한국인 하악골 전돌증 환자의 악교정수술을 위한 ENaP(Esthetic NaP)선의 유효성에 관한 연구 = EFFICACY OF ENaP(ESTHETIC NaP)-LINE FOR ORTHOGNATHIC SURGERY OF KOREAN MANDIBULAR PROGNATHISM

다국어 초록 (Multilingual Abstract)

As the most of dentofacial deformity patients indicated to orthognathic surgery have strong desire for
esthetic improvement as well as functional improvement, ideal esthetic evaluation should be made at surgical
prediction.
Lateral cephalographs has been commonly used for surgical prediction, however, remarkable discrepancy
between esthetic viewpoint by simple looking and analysis on lateral cephalographs often found on evaluation
of sagittal position of the upper and lower jaws especially in cases of mandibular prognathism of Koreans. In
these cases, we have been employed Esthetic NaP(ENaP)-line for corrective evaluation and ideal surgical prediction
on lateral cephalographs, but the efficacy of ENaP-line has not been evaluated.
This is a study on efficacy of ENaP-line for orthognathic surgery of Korean mandibular prognathism. 170 Korean
patients who had been diagnosed as mandibular prognathism and planned for orthognathic surgery at Department of
Oral and Maxillofacial Surgery, College of Dentistry, Yonsei University during last 10 years are studied. The obtained
results are as followings; among 170 patients of mandibular prognathism, 132 patients(77.6%) had not discrepancy
in evaluation of sagittal position of the maxilla between cephalometric and esthetic evaluation(they are classified as
Group I), however, 38 patients(22.4%) had definite discrepancy(they are classified as Group II). ENaP-line was
employed in all cephalometric analysis of Group II. The proportions of male and female were similar in both Groups.
Sixteen vertical reference lines perpendicular to 16 horizontal reference lines were obtained as followings;
Each of the representative degree of ∠SN/AFH, ∠SN/CFH and ∠AFH/CFH obtained at Group I was applied to SN
plane, AFH plane and CFH plane of Group II each other, and so 16 horizontal reference lines could be obtained
individually according to each of the applied degree to each plane. And then their reliability to coincide with
ENaP-line of Group II was evaluated. A vertical reference line perpendicular to a horizontal line made by
application of the representative degree of ∠AFH/CFH in Group I to AFH line in Group II had the most highest
coincidence with ENaP-line of Group II, however, its agreement was 42% in male and 47% in female.
From this results, the rest of them should be determined their corrective jaw position definitely depend on