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- Table of Contents
Evidence-Based Complementary and Alternative Medicine
Volume 2013 (2013), Article ID 351062, 8 pages
Does Propolis Help to Maintain Oral Health?
1Department of Prosthetic Dentistry, Faculty of Dentistry, Wrocław Medical University, 50425 Wrocław, Poland
2Division of Dental Materials, Faculty of Dentistry, Wrocław Medical University, ul. Krakowska 26, 50425 Wrocław, Poland
3Department of Oral Surgery, Faculty of Medicine and Dentistry, Medical University of Silesia in Katowice, 41902 Bytom, Poland
Received 9 December 2012; Accepted 22 December 2012
Academic Editor: Wojciech Krol
Copyright © 2013 Włodzimierz Więckiewicz et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Propolis, known also as bee glue, is a wax-cum-resin substance which is created out of a mix of buds from some trees with the substance secreted from bee's glands. Its diverse chemical content is responsible for its many precious salubrious properties. It was used in medicine already in ancient Egypt. Its multiple applications during the centuries have been studied and described in details. The purpose of this study is to present the possible use of propolis in treatment of various diseases of oral cavity in their dental aspect. The paper presents properties and possible applications of bee glue depending on dental specialities. An overview of publications which appeared during the recent years will allow the reader to follow all the possibilities to apply propolis in contemporary dentistry.
Propolis is a wax-cum-resin substance that is produced by bees. The word itself comes from ancient Greek, means an outer wall of a city (pro: before, polis: city) and relates to the protective properties of the substance. Bees use it to protect and reinforce their hives, repair their structure, and to cover honeycombs. It kills pathogens, protects against rain and being a very sticky substance, prevents unwanted guests from entering the hive [1–3]. Not all species of bees produce bee glue at the same degree . The colonies of Apis dorsata, called giant honey bee, use propolis to strengthen adhesion of the hive, while Apis cerana does not use it at all. Apis mellifera is the species which uses propolis in every possible way . Bee glue is made from substances collected by bees from tree buds which are then digested and mixed with the substance secreted by bee’s glands. It is dark green or brown and its chemical content depends on the geographic zone from which it comes . Most often propolis is composed of: resins (40–55%), bee wax and fatty acids (20–35%), aromatic oils (about 10%), pollen (about 5%), and other components like minerals and vitamins. Nevertheless, their presence and percentage content in propolis changes and depends on their origin, the type of plant pollen, and the species of bees that produced it [7, 8]. The results of the study published by Dias et al. present the percentage content of phenol compounds within the range between % and %, flavonoids between % and % for propolis from different regions of Portugal . Choi et al. defined the range of phenol compounds between 12.0% and 21.2% for propolis from different areas of Korea . The research carried out by Inouye et al. showed that one of varieties of Japanese propolis contains neither flavonoid nor phenolic acid . The composition of chemical compounds is responsible for the properties of propolis. Application of bee adhesive in medicine has been described extensively. It has antibacterial, antifungal, anti-inflammatory, anticancer, antiviral, immunostimulator, and many other properties [12–21]. A wide spectrum of its reaction allows to use it in many medical specialisations. Contemporary dentistry is an inseparable part of medicine and therefore attempts were made to use propolis in dentistry, as well.
The aim of this paper is to present the possibilities to apply propolis in various branches of dentistry on the basis of chosen articles available from PubMed, PubMed Central, and CINAHL databases that were published between 1976 and 2012. The paper which have been selected include valuable original articles and case reports related to terms: propolis, dentistry, bee glue, and allergy.
2. Use of Propolis in Dental Specialties
2.1. Oral Hygiene
The basic role in development of dental caries plays Streptococcus mutans and, to a lower degree, Lactobacillus sp.. Cariogenic influence of other bacteria including Streptococcus, Enterococcus, or Actinomyces is disputable . Virulence of Streptococcus mutans results from its ability to adhesion, acid-forming properties, and tolerance to environment with low pH . In order to prevent dental caries an attempt was made to analyse the influence of propolis on mouth environment and bacterial flora, in particular on S. mutans. In 1991, Ikeno et al. proved that propolis considerably reduces teeth caries in rats as the result of its multidirectional influence on bacterial flora: it limits the number of microorganisms, slows down synthesis of insoluble glucans, and slows down activity of glucosyltransferase . Studies done by other authors unanimously show that extracts from bee glue limit the quantity of bacterial plaque which influences the reduction of tooth caries [27–34]. Duarte et al. explained cariostatic effects of propolis by high quantity of fatty acids which slow down the production of acids by Streptococcus mutans and decreases the tolerance of microorganisms to acid pH . Özan et al. and Arslan et al. proved that propolis-based solutions are not as effective as chlorhexidine gluconate solutions in prevention of caries; nevertheless, their anticaries impact was statistically important in comparison with a control group [36, 37]. The study done by Özan et al. shows, however, that propolis-based solutions have lower cytotoxic effect on the cells of human gum fibroblasts than chlorhexidine, which predisposes them to be used as ingredient of mouthwashes . Nevertheless, the research done by Murray indicated that the effect of propolis extract on reducing bacterial plaque growth is marginal . In this case, the effect of use of propolis was slightly better than in the case of a control group, however, statistically it was negligible. In most researches propolis is used directly in the mouth in the form of ethanol- or water-based mouth rinses [27, 28, 31, 32, 34–36, 38] or in the form of a toothpaste [29, 30]. Propolis can be also used in a form of a solution to decontaminate fibres of toothbrushes .
Bacterial flora of the mouth can cause not only caries but also periodontal diseases. Bacterial plaque accumulated over and under gums contributes to inflammation of the tissues adjacent to teeth which leads to clinical attachment loss and a loss of alveolar process [40, 41]. Socransky et al. divided microbes which are located in the subgingival plaque into five complexes. One of them, the “red complex,” made up of Tannerella forsythensis, Porphyromonas gingivalis, and Treponema denticola has strong relation with an increased depth of periodontal pockets and with a bleeding on probing . Results of some studies indicated also Prevotella intermedia and Fusobacterium nucleatum as potential etiologic factors of periodontitis . A decrease of the number of these pathogenic microbes could potentially influence epidemiology of periodontal diseases by a limitation of their number and intensity. A research by Koo et al. indicated high effectiveness of a propolis extract on reducing growth of bacteria that belong to red complex . Also Santos et al., Feres et al., and Koru et al. confirmed antibacterial properties of propolis in relation to pathogens of periodontitis [44–46]. Santos et al. indicated also that antibacterial effects are conditioned by flavonoids, phenol acids, and their esters . A research carried out by Tanasiewicz et al. showed clinical effectiveness of a toothpaste and gel containing 3% ethanolic extract of propolis in a group of patients with a greater risk of gingivitis caused by dental plaque . As propolis mouth rinses and propolis-based toothpastes stop the growth of pathogens of gingivitis and periodontitis, they seem to be promising not only as preventive but also as therapeutic agents [30, 45, 48, 49]. The results of the study by Sonmez et al. showed, however, that propolis extracts in concentration that effectively reduces pathogenic organisms for periodontal diseases are cytotoxic for the gingival fibroblasts . Preventive effect of propolis on periodontal tissues includes also the slowing down of formation of precipitates of calcium phosphates and because of that, it can be used as ingredient of mouthwashes or toothpastes in order to limit the accumulation of dental plaque .
Halitosis, an unpleasant breath, is also largely related to hygiene of the oral cavity. The byproducts of degradation of microorganisms located in the mouth are one of the reasons of bad breath . Microbes particularly related to the creation of bad breath include the red complex bacteria and: Prevotella intermedia, Porphyromonas endodontalis, and Eubacterium . The measurements of the content of volatile sulfur components in exhaled air with the use of Halimeter done by Sterer and Rubinstein  and Barak and Katz  indicate that propolis reduces halitosis. Nevertheless, propolis is not as effective as zinc-, echinacea- or lavender-based products.
2.2. Periodontology and Oral Mucosa Pathologies
The confirmation of effectiveness of propolis in fighting etiological factors of periodontitis made some authors include these preparations in the periodontologic therapeutic protocol. Bruschi et al. proved that mucoadhesive hydrophilic gel that contains propolis, when applied to gingival pockets, can be useful in treatment of periodontitis . Research done by Coutinho allowed to conclude that additional subgingival irrigations with a propolis extract during periodontologic treatment allowed to obtain better results than scaling and root planning by themselves, which results from the assessment of both clinical and microbiological parameters . For this reason, it should be considered to include this type of therapy in the algorithm of periodontitis treatment. Not only local, but also oral use of propolis-based preparations turns out to be effective in periodontal treatment. Toker et al. carried out a study which on the basis of a morphologic and histologic picture showed that oral application of propolis prevents the loss of alveolar process bone in the case of periodontitis in rats .
Herpes simplex, the virus which causes a disease of mouth mucosa, is one of most popular human pathogens . In cases of infection caused by this virus attempts were made to use propolis-based extracts in its treatment. The use of propolis solutions by Schnitzler et al. disclosed that bee glue has high antiviral effectiveness. It was also found that single components of propolis do not have the same antiviral effect as their mixture in the form of bee glue. This is the basis for the conclusion that propolis extracts can be used locally in viral infections . The research done by Shimizu et al. indicates that propolis delays growth and progression of skin changes in an early stage of infection with Herpes simplex and does not cause cytotoxic effect . Propolis is also used in treatment of recurrent aphthoid stomatitis. Although it is a common disease whose symptoms appear in the mouth, its exact etiology has not been found yet which makes the therapy more difficult . Bee glue turned out to be effective in the treatment as it lowers down the frequency of recurrence of the disease and improves the quality of life of patients who suffer from recurrent stomatitis . Bee glue-based preparations seem also to be useful in treatment of stomatitis caused by chemotherapy, however, more research has to be done on this subject .
2.3. Oral Surgery
In dental surgery, propolis is used in replantation of avulsed permanent teeth and supports the healing process after surgery in the oral cavity.
Maintenance of alive periodontal cells is one of the crucial factors that condition a successful replantation of an avulsed permanent tooth. For this reason, many studies were conducted in order to find the best means to transport the complete displacement teeth . Most scientific studies show very good effects of storage of avulsed teeth in propolis. In the study done by Özan et al. propolis turned out to be a better means for transportation than milk or Hank’s Balanced Salt Solution . Also research done by Mori et al. in rats and laboratory study done by Saxena et al. recommend propolis as their choice for a means of transport [64, 66]. Gulinelli et al. state that there are no statistically important differences between storage of a avulsed tooth in physiological saline, sodium fluoride, or propolis in relation to the effects of a delayed replantation of a tooth . Bee glue seems, however, to be less effective in comparison with coconut milk which allows maintaining a bigger quantity of alive cells of periodontium . Nevertheless, a recent study done by Gjersten et al. indicates that propolis is extremely effective; it not only reduces apoptosis of periodontium cells but also increases their metabolic activity and proliferation .
Magro-Filho and de Carvalho proved that local application of propolis helps to heal wounds after a surgery within the oral cavity, reduces inflammation and has analgesic effect . Also Lopes-Rocha et al. noted a beneficial effect of bee glue on healing of surgical wounds within the oral cavity. Propolis decreases inflammation and speeds up creation of granulation tissue and epithelialization .
In malocclusions accompanied by a considerable narrowing of the maxilla, it is necessary to use a device to expand the palatine suture. During the treatment bone remodeling takes place within the palatine suture. The research carried out by Altan et al. on rats confirms positive effect of propolis solution on bone forming process during the treatment with the device to expand the palatine suture . The results of the research show an increased quantity of osteoblasts in preparations from rats which received propolis during the treatment. In such cases the bone remodeling within the palatine suture was quicker.
2.5. Restorative Dentistry
In restorative dentistry, propolis can be used to decrease permeability of the dentin and to direct pulp capping in order to create restorative dentin.
Sales-Peres et al. found that propolis can reduce dentin permeability. On this basis, it can be concluded that it counteracts tooth sensitivity. This feature results from the fact that bee glue has the capacity to partially impregnate dental tubules .
The direct pulp capping after mechanical or chemical uncovering is made in order to stimulate the pulp to create restorative dentin. The regenerative effect of propolis on the tooth pulp has been known for a long time . Nevertheless, there is no consent on the subject of propolis extracts effectiveness in comparison with calcium hydroxide which is most often used in stimulation of creation a reparative dentin. Bretz et al. state that there are no important differences in direct capping with propolis and with calcium hydroxide-based products. Both of them offer a similar degree of healing pulp inflammation, reducing quantity of microbes and stimulating creation of dentin bridge . Also the studies carried out by Parolia et al. and Ozório et al. indicate that propolis, calcium hydroxide, and MTA have similar effectiveness in induction to create reparative dentin [69, 83]. However, the results of the research done by Ahangari et al. prove clearly higher effectiveness of direct pulp capping with propolis than with calcium hydroxide-based products. It not only stops inflammatory reaction, infection with microbes and pulp necrosis but also induces formation of high quality tubular dentin through stimulation of stem cells . According to Sabir et al., the simulative effect on dental pulp is conditioned by presence of flavonoids in propolis extracts .
One of the aims of endodontic treatment is a complete elimination of microbes in root canals . The effectiveness of medicines used in endodontology is often assessed through a test of Enterococcus faecalis growth which is resistant to unfavorable environment and can survive in root canal system despite application of some medicaments . Many studies show that propolis effectively limits the quantity of E. faecalis in root canals [71, 72, 88–91]. The studies done by Kayaoglu et al. and Mattigati et al. indicated that effectiveness of propolis in decontamination of root canals is lower than that of chlorhexidine [71, 72]. Some researches indicate that propolis is more effective in fighting microbes than calcium hydroxide-based products [71, 72]. Some authors proved that bee glue has antibacterial properties similar to calcium hydroxide or worse . Such differences may result from different times of measurement. Cuevas-Guajardo et al. carried a research which show that calcium hydroxide is more effective than propolis up to 24 hours from application. After 48 and 72 hours a mix of propolis with calcium hydroxide with volume proportion 1 : 3 showed best antibacterial properties . Because of inconsiderable inflammation of periapical tissue and protective effect on the cells of periodontium, propolis can be effectively used as a product to disinfect the root canals [73, 94].
2.7. Prosthetic Dentistry
Denture stomatitis is a frequent pathology in patients who use removable dentures. Etiological factors of this disease include, first of all, an infection with Candida albicans, an incorrect hygiene of the oral cavity and prolonged use of dental prosthesis . Propolis-based products have strong antifungal properties in relation to Candida albicans and to other types of Candida sp, whereas Candida albicans is most sensitive to propolis [28, 32, 96, 97]. Propolis solutions can be used in form of mouthwash [74, 97] or a gel for local application  in therapy of patients with oral candidiasis connected with use of removable dentures. However, da Silva et al. proved that a gel which contains propolis, used in treatment of denture stomatitis, can have a negative effect on the structure of the surface of acrylic resin which becomes rough and more prone to adhesion of microbes .
In spite of many benefits and possibilities of application of propolis in dentistry, presented in Table 1, there is a risk of allergy to it. The results of the study by Münstedt and Kalder in a group of 41 German bee beekeepers indicate that 70.7% of them had the symptoms of a contact allergy after 9.5 years of professional work, on average . Its symptoms were mostly limited to itching and a rash. The allergy for the second group was confirmed by skin tests. Brailo et al. described a case of a generally healthy 20-year-old patient who had irregular erosions partially covered with pseudomembranes that involved both lips and retrocomissural mucosa . She stated that she had used a propolis solution in treatment of aphthous ulcers. The changes in the mucosa appeared after 10 days of using the product. A late contact allergy to propolis was diagnosed. She was instructed to discontinue the use of propolis-based product and to use 0.05% betamethasone 3 times a day for 14 days. The patient followed the instructions and the changes on lips and the mucosa began to disappear. Zirwas and Otto state that during the last 10 years allergy to propolis has increased from 0.5% to 1.4% . This can be an important discovery, considering that bee glue is more and more often used as a component of toothpastes, chewing gums, creams, and ointments. For this reason, the research on propolis has to be continued in order to define the algorithms of its application in various branches of dentistry on the basis of its biological activity.
Propolis-based preparations have a wide range of applications in various specialities of dentistry. Thanks to the richness of natural components in it, bee glue has antibacterial, antiviral, antifungal, anti-inflammatory, analgesic, and many other applications. Although it offers many benefits, one should remember that its use may bring in the risk of an allergy.
- E. L. Ghisalberti, P. R. Jefferies, R. Lanteri, and J. Matisons, “Constituents of propolis,” Experientia, vol. 34, no. 2, pp. 157–158, 1978.
- P. T. Starks, C. A. Blackie, and P. T. Thomas D Seeley, “Fever in honeybee colonies,” Naturwissenschaften, vol. 87, no. 5, pp. 229–231, 2000.
- N. Wilson-Rich, M. Spivak, N. H. Fefferman, and P. T. Starks, “Genetic, individual, and group facilitation of disease resistance in insect societies,” Annual Review of Entomology, vol. 54, pp. 405–423, 2009.
- R. E. Page Jr and M. K. Fondrk, “The effects of colony-level selection on the social organization of honey bee (Apis mellifera L.) colonies: colony-level components of pollen hoarding,” Behavioral Ecology and Sociobiology, vol. 36, no. 2, pp. 135–144, 1995.
- T. D. Seeley and R. A. Morse, “The nest of the honey bee (Apis mellifera L.),” Insectes Sociaux, vol. 23, no. 4, pp. 495–512, 1976.
- M. Simone-Finstrom and M. Spivak, “Propolis and bee health: the natural history and significance of resin use by honey bees,” Apidologie, vol. 41, no. 3, pp. 295–311, 2010.
- A. H. Banskota, Y. Tezuka, and S. Kadota, “Recent progress in pharmacological research of propolis,” Phytotherapy Research, vol. 15, no. 7, pp. 561–571, 2001.
- M. L. Khalil, “Biological activity of bee propolis in health and disease,” Asian Pacific Journal of Cancer Prevention, vol. 7, no. 1, pp. 22–31, 2006.
- L. G. Dias, A. P. Pereira, and L. M. Estevinho, “Comparative study of different Portuguese samples of propolis: pollinic, sensorial, physicochemical, microbiological characterization and antibacterial activity,” Food and Chemical Toxicology, vol. 50, no. 12, pp. 4246–4253, 2012.
- Y. M. Choi, D. O. Noh, S. Y. Cho, H. J. Suh, K. M. Kim, and J. M. Kim, “Antioxidant and antimicrobial activities of propolis from several regions of Korea,” Food Science and Technology, vol. 39, no. 7, pp. 756–761, 2006.
- S. Inouye, M. Takahashi, and S. Abe, “Composition, antifungal activity and radical scavenging activities of 4 propolis,” Medical Mycology Journal, vol. 52, no. 4, pp. 305–313, 2011.
- H. Menezes, M. Bacci Jr, S. D. Oliveira, and F. C. Pagnocca, “Antibacterial properties of propolis and products containing propolis from Brazil,” Apidologie, vol. 28, no. 2, pp. 71–76, 1997.
- L. C. Lu, Y. W. Chen, and C. C. Chou, “Antibacterial activity of propolis against Staphylococcus aureus,” International Journal of Food Microbiology, vol. 102, no. 2, pp. 213–220, 2005.
- J. S. Bonvehi and A. L. Gutierrez, “The antimicrobial effects of propolis collected in different regions in the Basque Country (Northern Spain),” World Journal of Microbiology and Biotechnology, vol. 28, no. 4, pp. 1351–1358, 2012.
- M. L. Bruschi, K. F. D. Dota, M. E. L. Consolaro, and T. I. E. Svidzinski, “Antifungal activity of brazilian propolis microparticles against yeasts isolated from vulvovaginal candidiasis,” Evidence-based Complementary and Alternative Medicine, vol. 2011, Article ID 201953, 8 pages, 2011.
- A. N. Koç, S. Silici, F. Kasap, H. T. Hörmet-Oz, H. Mavus-Buldu, and B. D. Ercal, “Antifungal activity of the honeybee products against Candida spp. and Trichosporon spp,” Journal of Medicinal Food, vol. 14, no. 1-2, pp. 128–134, 2011.
- Z. Orban, N. Mitsiades, T. R. Burke Jr, M. Tsokos, and G. P. Chrousos, “Caffeic acid phenethyl ester induces leukocyte apoptosis, modulates nuclear factor-kappa B and suppresses acute inflammation,” NeuroImmunoModulation, vol. 7, no. 2, pp. 99–105, 2000.
- H. F. Liao, Y. Y. Chen, J. J. Liu et al., “Inhibitory effect of caffeic acid phenethyl ester on angiogenesis, tumor invasion, and metastasis,” Journal of Agricultural and Food Chemistry, vol. 51, no. 27, pp. 7907–7912, 2003.
- M. Amoros, F. Sauvagerb, L. Girre, and M. Cormier, “in vitro antiviral activity of propolis,” Apidologie, vol. 23, no. 3, pp. 231–240, 1992.
- M. R. Fesen, K. W. Kohn, F. Leteurtre, and Y. Pommier, “Inhibitors of human immunodeficiency virus integrase,” Proceedings of the National Academy of Sciences of the United States of America, vol. 90, no. 6, pp. 2399–2403, 1993.
- S. A. Nassar, A. H. Mohamed, H. Soufy, S. M. Nasr, and K. M. Mahran, “Immunostimulant effect of Egyptian propolis in rabbits,” Science World Journal, vol. 2012, Article ID 901516, 9 pages, 2012.
- C. J. Seneviratne, C. F. Zhang, and L. P. Samaranayake, “Dental plaque biofilm in oral health and disease,” Chinese Journal of Dental Research, vol. 14, no. 2, pp. 87–94, 2011.
- S. S. Socransky and A. D. Haffajee, “Periodontal microbial ecology,” Periodontology 2000, vol. 38, pp. 135–187, 2005.
- J. M. Tanzer, J. Livingston, and A. M. Thompson, “The microbiology of primary dental caries in humans,” Journal of dental education, vol. 65, no. 10, pp. 1028–1037, 2001.
- J. A. Banas, “Virulence properties of Streptococcus mutans,” Frontiers in Bioscience, vol. 9, pp. 1267–1277, 2004.
- K. Ikeno, T. Ikeno, and C. Miyazawa, “Effects of propolis on dental caries in rats,” Caries Research, vol. 25, no. 5, pp. 347–351, 1991.
- D. Steinberg, G. Kaine, and I. Gedalia, “Antibacterial effect of propolis and honey on oral bacteria,” American Journal of Dentistry, vol. 9, no. 6, pp. 236–239, 1996.
- H. Koo, B. P. F. A. Gomes, P. L. Rosalen, G. M. B. Ambrosano, Y. K. Park, and J. A. Cury, “In vitro antimicrobial activity of propolis and Arnica montana against oral pathogens,” Archives of Oral Biology, vol. 45, no. 2, pp. 141–148, 2000.
- M. Sato, S. Fujiwara, M. Nagayama et al., “Effect of propolis and propolis-containing toothpaste on the formation of dental plaque in vitro,” Oral Therapeutics and Pharmacology, vol. 20, no. 1, pp. 5–10, 2001.
- P. I. Botushanov, G. I. Grigorov, and G. A. Aleksandrov, “A clinical study of a silicate toothpaste with extract from propolis,” Folia Medica, vol. 43, no. 1-2, pp. 28–30, 2001.
- H. Koo, J. A. Cury, P. L. Rosalen, G. M. B. Ambrosano, M. Ikegaki, and Y. K. Park, “Effect of a mouthrinse containing selected propolis on 3-day dental plaque accumulation and polysaccharide formation,” Caries Research, vol. 36, no. 6, pp. 445–448, 2002.
- J. Momen-Beitollahi, A. Mansorian, M. Esmaili, M. Amanlou, A. Mohamadnia, and N. Bahrami, “Antimicrobial effects of propolis extract on the most prevalent oral pathogens: an in-vitro study,” Journal of Islamic Dentalal Association Iran, vol. 21, no. 1, pp. 33–39, 2009.
- J. G. Jeon, P. L. Rosalen, M. L. Falsetta, and H. Koo, “Natural products in caries research: current (limited) knowledge, challenges and future perspective,” Caries Research, vol. 45, no. 3, pp. 243–263, 2011.
- T. S. Kashi, R. K. Kermanshahi, M. Erfan, E. V. Dastjerdi, Y. Rezaei, and F. S. Tabatabaei, “Evaluating the in vitro antibacterial effect of Iranian propolis on oral microorganisms,” Iranian Journal of Pharmaceutical Research, vol. 10, no. 2, pp. 363–368, 2011.
- S. Duarte, P. L. Rosalen, M. F. Hayacibara et al., “The influence of a novel propolis on mutans streptococci biofilms and caries development in rats,” Archives of Oral Biology, vol. 51, no. 1, pp. 15–22, 2006.
- F. Özan, Z. Sümer, Z. A. Polat, K. Er, U. Ozan, and O. Deger, “Effect of mouthrinse containing propolis on oral microorganisms and human gingival fibroblasts,” European Journal of Dentistry, vol. 1, no. 4, pp. 195–201, 2007.
- S. Arslan, S. Silici, D. Perçin, A. N. Koç, and Ő. Er, “Antimicrobial activity of poplar propolis on mutans streptococci and caries development in rats,” Turkish Journal of Biology, vol. 36, pp. 65–73, 2012.
- M. C. Murray, “A study to investigate the effect of a propolis-containing mouthrinse on the inhibition of de novo plaque formation,” Journal of Clinical Periodontology, vol. 24, no. 11, pp. 796–798, 1997.
- P. F. Bertolini, O. Biondhi Filho, A. Pomilio, S. L. Pinheiro, and M. S. Carvalho, “Antimicrobial capacity of Aloe vera and propolis dentifrice against Streptoccocus mutans strains in toothbrushes: an in vitro study,” Journal of Applied Oral Science, vol. 20, no. 1, pp. 32–37, 2012.
- R. P. Darveau, “Periodontitis: a polymicrobial disruption of host homeostasis,” Nature Reviews Microbiology, vol. 8, no. 7, pp. 481–490, 2010.
- P. E. Kolenbrander, R. J. Palmer Jr, S. Periasamy, and N. S. Jakubovics, “Oral multispecies biofilm development and the key role of cell-cell distance,” Nature Reviews Microbiology, vol. 8, no. 7, pp. 471–480, 2010.
- S. S. Socransky, A. D. Haffajee, M. A. Cugini, C. Smith, and R. L. Kent Jr, “Microbial complexes in subgingival plaque,” Journal of Clinical Periodontology, vol. 25, no. 2, pp. 134–144, 1998.
- M. Feres, S. C. Cortellii, L. C. Figueiredo, A. D. Haffajee, and S. S. Socransky, “Microbiological basis for periodontal therapy,” Journal of Applied Oral Science, vol. 12, no. 4, pp. 256–266, 2004.
- F. A. Santos, E. M. A. Bastos, M. Uzeda et al., “Antibacterial activity of Brazilian propolis and fractions against oral anaerobic bacteria,” Journal of Ethnopharmacology, vol. 80, no. 1, pp. 1–7, 2002.
- M. Feres, L. C. Figueiredo, I. M. Barreto, M. H. Coelho, M. W. Araujo, and S. C. Cortelli, “In vitro antimicrobial activity of plant extracts and propolis in saliva samples of healthy and periodontally-involved subjects,” Journal of the International Academy of Periodontology, vol. 7, no. 3, pp. 90–96, 2005.
- O. Koru, F. Toksoy, C. H. Acikel et al., “In vitro antimicrobial activity of propolis samples from different geographical origins against certain oral pathogens,” Anaerobe, vol. 13, no. 3-4, pp. 140–145, 2007.
- M. Tanasiewicz, M. Sucha-Nowak, M. Dawiec, W. Król, D. Skaba, and H. Twardawa, “Influence of hygienic preparations with a 3% content of ethanol extract of brazilian propolis on the state of the oral cavity,” Advances in Clinical and Experimental Medicine, vol. 21, no. 1, pp. 81–92, 2012.
- E. M. R. Pereira, J. L. D. C. Da Silva, F. F. Silva et al., “Clinical evidence of the efficacy of a mouthwash containing propolis for the control of plaque and gingivitis: a phase II study,” Evidence-based Complementary and Alternative Medicine, vol. 2011, Article ID 750249, 7 pages, 2011.
- S. Sonmez, L. Kirilmaz, M. Yucesoy, B. Yücel, and B. Yilmaz, “The effect of bee propolis on oral pathogens and human gingival fibroblasts,” Journal of Ethnopharmacology, vol. 102, no. 3, pp. 371–376, 2005.
- S. Hidaka, Y. Okamoto, K. Ishiyama, and K. Hashimoto, “Inhibition of the formation of oral calcium phosphate precipitates: the possible effects of certain honeybee products,” Journal of Periodontal Research, vol. 43, no. 4, pp. 450–458, 2008.
- W. J. Loesche, “The effects of antimicrobial mouthrinses on oral malodor and their status relative to US Food and Drug Administration regulations,” Quintessence International, vol. 30, no. 5, pp. 311–318, 1999.
- A. M. W. T. van den Broek, L. Feenstra, and C. De Baat, “A review of the current literature on management of halitosis,” Oral Diseases, vol. 14, no. 1, pp. 30–39, 2008.
- N. Sterer and Y. Rubinstein, “Effect of various natural medicinals on salivary protein putrefaction and malodor production,” Quintessence International, vol. 37, no. 8, pp. 653–658, 2006.
- S. Barak and J. Katz, “The effect of Breezy candy on halitosis: a double-blind controlled and randomized study,” Quintessence International, vol. 43, no. 4, pp. 313–317, 2012.
- M. L. Bruschi, D. S. Jones, H. Panzeri, M. P. D. Gremião, O. De Freitas, and E. H. G. Lara, “Semisolid systems containing propolis for the treatment of periodontal disease: in vitro release kinetics, syringeability, rheological, textural, and mucoadhesive properties,” Journal of Pharmaceutical Sciences, vol. 96, no. 8, pp. 2074–2089, 2007.
- A. Coutinho, “Honeybee propolis extract in periodontal treatment. A clinical and microbiological study of propolis in periodontal treatment,” Indian Journal of Dental Research, vol. 23, no. 2, p. 294, 2012.
- H. Toker, F. Ozan, H. Ozer, H. Ozdemir, K. Eren, and H. Yeler, “A morphometric and histopathologic evaluation of the effects of propolis on alveolar bone loss in experimental periodontitis in rats,” Journal of Periodontology, vol. 79, no. 6, pp. 1089–1094, 2008.
- A. Jamali, M. H. Roostaee, H. Soleimanjahi, F. Ghaderi Pakdel, and T. Bamdad, “DNA vaccine-encoded glycoprotein B of HSV-1 fails to protect chronic morphine-treated mice against HSV-1 challenge,” Comparative Immunology, Microbiology and Infectious Diseases, vol. 30, no. 2, pp. 71–80, 2007.
- P. Schnitzler, A. Neuner, S. Nolkemper et al., “Antiviral activity and mode of action of propolis extracts and selected compounds,” Phytotherapy Research, vol. 24, no. 1, pp. 20–28, 2010.
- T. Shimizu, Y. Takeshita, Y. Takamori et al., “Efficacy of brazilian propolis against Herpes Simplex Virus type 1 infection in mice and their modes of antiherpetic efficacies,” Evidence-Based Complementary and Alternative Medicine, vol. 2011, Article ID 976196, 9 pages, 2011.
- L. Preeti, K. Magesh, K. Rajkumar, and R. Karthik, “Recurrent aphthous stomatitis,” Journal of Oral and Maxillofacial Pathologies, vol. 15, no. 3, pp. 252–256, 2011.
- N. Samet, C. Laurent, S. M. Susarla, and N. Samet-Rubinsteen, “The effect of bee propolis on recurrent aphthous stomatitis: a pilot study,” Clinical Oral Investigations, vol. 11, no. 2, pp. 143–147, 2007.
- M. Abdulrhman, N. S. El Barbary, D. A. Amin, and R. S. Ebrahim, “Honey and a mixture of honey, beeswax and olive-oil-propolis extract in treatment of chemotherapy induced oral mucositis: a randomized controlled pilot study,” Pediatric Hematology and Oncology, vol. 29, no. 3, pp. 285–292, 2012.
- P. Saxena, V. A. Pant, K. K. Wadhwani, M. P. Kashyap, S. K. Gupta, and A. B. Pant, “Potential of the propolis as storage medium to preserve the viability of cultured human periodontal ligament cells: an in vitro study,” Dental Traumatology, vol. 27, no. 2, pp. 102–108, 2011.
- F. Özan, Z. A. Polat, K. Er, Ü. Özan, and O. Deǧer, “Effect of propolis on survival of periodontal ligament cells: new storage media for avulsed teeth,” Journal of Endodontics, vol. 33, no. 5, pp. 570–573, 2007.
- G. G. Mori, D. C. Nunes, L. R. Castilho, I. G. D. Moraes, and W. R. Poi, “Propolis as storage media for avulsed teeth: microscopic and morphometric analysis in rats,” Dental Traumatology, vol. 26, no. 1, pp. 80–85, 2010.
- R. Lopes-Rocha, J. L. Miranda, N. L. Lima et al., “Effect of topical propolis and dexamethasone on the healing of oral surgical wounds,” Wound Healing Southern Africa, vol. 5, no. 1, pp. 25–30, 2012.
- B. A. Altan, I. M. Kara, R. Nalcaci et al., “Systemic propolis stimulates new bone formation at the expanded suture a histomorphometric study,” The Angle Orthodontist. In press.
- A. Parolia, M. Kundabala, N. N. Rao et al., “A comparative histological analysis of human pulp following direct pulp capping with Propolis, mineral trioxide aggregate and Dycal,” Australian Dental Journal, vol. 55, no. 1, pp. 59–64, 2010.
- S. H. Sales-Peres, F. N. Carvalho, J. A. Marsicano et al., “Effect of propolis gel on the in vitro reduction of dentin permeability,” Journal of Applied Oral Science, vol. 19, no. 4, pp. 318–323, 2011.
- G. Kayaoglu, G. Ömürlü, G. Akca et al., “Antibacterial activity of Propolis versus conventional endodontic disinfectants against Enterococcus faecalis in infected dentinal tubules,” Journal of Endodontics, vol. 37, no. 3, pp. 376–381, 2011.
- S. Mattigati, P. Ratnakar, S. Moturi, S. Varma, and S. Rairam, “Antimicrobial effect of conventional root canal medicaments vs propolis against Enterococcus faecalis, Staphylococcus aureus and Candida albicans,” Journal of Contemporary Dental Practice, vol. 13, no. 3, pp. 305–309, 2012.
- I. F. Ramos, M. T. Biz, N. Paulino et al., “Histopathological analysis of cortycosteroid-antibiotic preparation and propolis paste formulation as intracanal medication after pulpectomy: an in vivo study,” Journal of Applied Oral Science, vol. 20, no. 1, pp. 50–56, 2012.
- V. R. Santos, F. J. G. S. Pimenta, M. C. F. Aguiar, M. A. V. Do Carmo, M. D. Naves, and R. A. Mesquita, “Oral candidiasis treatment with Brazilian ethanol propolis extract,” Phytotherapy Research, vol. 19, no. 7, pp. 652–654, 2005.
- V. R. Santos, R. T. Gomes, R. A. De Mesquita et al., “Efficacy of brazilian propolis gel for the management of denture stomatitis: a pilot study,” Phytotherapy Research, vol. 22, no. 11, pp. 1544–1547, 2008.
- M. Goswami, T. Chaitra, S. Chaudhary, N. Manuja, and A. Sinha, “Strategies for periodontal ligament cell viability: an overview,” Journal of Conservative Dentistry, vol. 14, no. 3, pp. 215–220, 2011.
- J. L. Gulinelli, S. R. Panzarini, C. M. R. D. S. Fattah et al., “Effect of root surface treatment with propolis and fluoride in delayed tooth replantation in rats,” Dental Traumatology, vol. 24, no. 6, pp. 651–657, 2008.
- V. Gopikrishna, P. S. Baweja, N. Venkateshbabu, T. Thomas, and D. Kandaswamy, “Comparison of coconut water, propolis, HBSS, and milk on PDL Cell survival,” Journal of Endodontics, vol. 34, no. 5, pp. 587–589, 2008.
- A. W. Gjersten, K. A. Stothz, K. G. Neiva, and R. Pileggi, “Effect of propolis on proliferation and apoptosis of periodontal ligament fibroblasts,” Oral Surgury, Oral Medicine, Oral Pathology, Oral Radiology and Endodontics, vol. 112, no. 6, pp. 843–848, 2011.
- O. Magro-Filho and A. C. de Carvalho, “Topical effect of propolis in the repair of sulcoplasties by the modified Kazanjian technique. Cytological and clinical evaluation,” The Journal of Nihon University School of Dentistry, vol. 36, no. 2, pp. 102–111, 1994.
- S. Scheller, L. Ilewicz, and M. Luciak, “Biological properties and clinical application of propolis. IX. Experimental observation on the influence of ethanol extract of propolis (EEP) on dental pulp regeneration,” Arzneimittel-Forschung/Drug Research, vol. 28, no. 2, pp. 289–291, 1978.
- W. A. Bretz, D. J. Chiego Jr, M. C. Marcucci, I. Cunha, A. Custodio, and L. G. Schneider, “Preliminary report on the effects of propolis on wound healing in the dental pulp,” Zeitschrift fur Naturforschung C, vol. 53, no. 11-12, pp. 1045–1048, 1998.
- J. E. Ozório, L. F. Carvalho, D. A. de Oliveira, M. D. de Sousa-Neto, and D. E. Perez, “Standardized propolis extract and calcium hydroxide as pulpotomy agents in primary pig teeth,” Journal of Dentistry For Children, vol. 79, no. 2, pp. 53–58, 2012.
- Z. Ahangari, M. Naseri, M. Jalili, Y. Mansouri, F. Mashhadiabbas, and A. Torkman, “Effect of propolis on dentin regeneration and the potential Role of dental pulp stem cel in guinea pig,” Cell Journal, vol. 13, no. 4, pp. 223–228, 2012.
- A. Sabir, C. R. Tabbu, P. Agustiono, and W. Sosroseno, “Histological analysis of rat dental pulp tissue capped with propolis,” Journal of Oral Science, vol. 47, no. 3, pp. 135–138, 2005.
- A. Byström and G. Sundqvist, “Bacteriologic evaluation of the efficacy of mechanical root canal instrumentation in endodontic therapy,” Scandinavian Journal of Dental Research, vol. 89, no. 4, pp. 321–328, 1981.
- G. Pardi, “Detection of Enterococcus faecalis in teeth with endodontic treatment failure,” Acta Odontologica Venezolana, vol. 47, no. 1, pp. 110–121, 2009.
- O. Oncag, D. Cogulu, A. Uzel, and K. Sorkun, “Efficacy of propolis as an intracanal medicament against Enterococcus faecalis,” General Dentistry, vol. 54, no. 5, pp. 319–322, 2006.
- G. Shveta, “A comparative evaluation of the antibacterial efficacy of propolis, 3% sodium hypochlorite and 0,2% chlorhexidine gluconate against Enterococcus faecalis-an in vitro study,” Endodontology, vol. 19, no. 2, pp. 31–38, 2007.
- F. B. Ferreira, S. A. Torres, O. P. da Silva Rosa et al., “Antimicrobial effect of propolis and other substances against selected endodontic pathogens,” Oral Surgery, Oral Medicine, Oral Pathology, Oral Radiology and Endodontology, vol. 104, no. 5, pp. 709–716, 2007.
- L. Awawdeh, M. AL-Beitawi, and M. Hammad, “Effectiveness of propolis and calcium hydroxide as a short-term intracanal medicament against Enterococcus faecalis: a laboratory study,” Australian Endodontic Journal, vol. 35, no. 2, pp. 52–58, 2009.
- M. C. Valera, J. A. Da Rosa, L. E. Maekawa et al., “Action of propolis and medications against Escherichia coli and endotoxin in root canals,” Oral Surgery, Oral Medicine, Oral Pathology, Oral Radiology and Endodontology, vol. 110, no. 4, pp. e70–e74, 2010.
- S. Cuevas-Guajardo, G. Arzate-Sosa, R. I. Flores-Chavez, L. V. Fabela-Gonzalez, and H. Mendieta-Zeron, “Antimicrobial activity with mixture of calcium hydroxide and propolis,” International Journal of Pharma and Bio Sciences, vol. 2, no. 4, pp. 203–210, 2011.
- A. Al-Shaher, J. Wallace, S. Agarwal, W. Bretz, and D. Baugh, “Effect of propolis on human fibroblasts from the pulp and periodontal ligament,” Journal of Endodontics, vol. 30, no. 5, pp. 359–361, 2004.
- L. Gendreau and Z. G. Loewy, “Epidemiology and etiology of denture stomatitis,” Journal of Prosthodontics, vol. 20, no. 4, pp. 251–260, 2011.
- Y. B. Ghasem, A. Ownagh, and M. Hasanloei, “Antibacterial and antifungal activity of Iranian propolis against Staphylococcus aureus and Candida albicans,” Pakistan Journal of Biological Sciences, vol. 10, no. 8, pp. 1343–1345, 2007.
- C. Ota, C. Unterkircher, V. Fantinato, and M. T. Shimizu, “Antifungal activity of propolis on different species of Candida,” Mycoses, vol. 44, no. 9-10, pp. 375–378, 2001.
- W. J. da Silva, R. N. Rached, P. L. Rosalen, and A. A. Del Bel Cury, “Effects of nystatin, fluconazole and propolis on poly(Methyl Methacrylate) resin surface,” Brazilian Dental Journal, vol. 19, no. 3, pp. 190–196, 2008.
- K. Münstedt and M. Kalder, “Contact allergy to propolis in beekeepers,” Allergologia et Immunopathologia, vol. 37, no. 6, pp. 298–301, 2009.
- V. Brailo, V. V. Boras, I. Alajbeg, and V. Juras, “Delayed contact sensitivity on the lips and oral mucosa due to propolis-case report,” Medicina Oral, Patología Oral y Cirugía Bucal, vol. 11, no. 4, pp. E303–304, 2006.
- M. J. Zirwas and S. Otto, “Toothpaste allergy diagnosis and management,” Journal of Clinical and Aesthetic Dermatology, vol. 3, no. 5, pp. 42–47, 2010.