Hi, Thanks for using HCM.
One leg shorter than other may be due to congenital problem or due to surgery induced. If congenital the chance of the damage specially arthritis
with one limb is more due to uneven pressure on it. Since you had complete replacement the chance for it to cause size variation is also there. We can tell only with complete measurement and examination, hence consult your doctor for examination and management.
Hope I answered your question. Feel free to ask me if you have any further queries.
Wish you good health. Take care.