Evaluation of two reference planes to the horizon in the natural head position [electronic resource] /
EVALUATION OF TWO REFERENCE PLANES
TO THE HORIZON IN THE NATURAL HEAD
David M. Allport, D.D.S.
Dental casts are mounted to dental articulators using anatomical records in order
to simulate and duplicate static and dynamic interocclusal relationships. The three
dimensional relationship of the maxillary arch to the transverse horizontal axis of the
mandible is defined by establishing a third point of reference. The most common
reference plane is the Frankfort horizontal plane, which is theoretically parallel to the
horizon when the patient is in the natural head position.
1 The HIP [hamular notch
incisive papilla] plane has also been proposed as a true horizontal reference plane for
orienting the maxillary cast to the articulator.
2 The purpose of this study was to
examine the relationship of the Frankfort horizontal plane and the HIP plane to the
horizontal when the patient is in the natural head position. Ten subjects were
evaluated in the natural head position with angular measurements made from lateral
photographs and lateral skull radiographs to determine the relationship of these two
reference planes to the true horizontal plane. The mean, standard deviation and
coefficient variation were calculated for both reference planes. The clinical
significance of this information is to verify or modify those techniques used for
mounting dental casts to the dental articulator, which is used in treatment planning
and laboratory procedures.
I would like to dedicate this research to my Grandfathers’ Orval Allport and
Auston Crookshanks. Both these men dedicated their life working hard and taking care of
their families. They mean so much to me personally and all of my accomplishments.
Thank you, I love and miss you both.
To my parents, Thank you for giving me every opportunity a son could ask for
and the constant support and guidance that you have provided. You have influenced me
more than you probably realize. You have given me the two most important things
parents can give their children—roots and wings.
School:West Virginia University
School Location:USA - West Virginia
Source Type:Master's Thesis
Keywords:prosthodontics dental casting technique
Date of Publication: