Studies of cephalometric analysis and surgical planning of the dentofacial deformities with computer system.

概要

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Several treatments have been chosen as methods of surgical technic of the dentofacial deformities depending on various conditions.<BR>The results of the treatment are highly influenced by pre-operative planning. Then it is necessary to make a perfect pre-operative planning by understanding data of the dentoskeletal analysis. In order to get enough information from the facial profile, a comprehensive cephalometric analysis of "normal" adults was accomplished by examining a carefully selected subject group (30 men and 30 women) between the ages of 18 and 22.<BR>The X axis as a standard axis is constructed by drawing a line through nasion 6° up from sella (s)-nasion (n) line and the Y axis is a straight line crossing the X axis and passing point N. The 43 examining points (26 points found on the soft tissue and 17 points found on the hard tissue) were created on this X and Y axis. The 26 soft tissue points were considered as a function of several hard tissue points. Soft tissue-to-hard tissue ratios after operation were made by examining the 70 patients (with an average post-operative follow-up of 6 months) who required orthognathic surgery. A standardized profile was created from these data.<BR>The computer system was introduced based on this standardized figure and data This system is very useful for diagnosis, treatment planning and prediction of post-operative soft-tissue profile.
社団法人日本口腔外科学会の論文