후진 이부성형술의 경조직과 연조직 측모 변화 예측에 관한 연구
A Study on the Prediction of Hard and Soft Tissue Changes after Setback Genioplasty
양정은, 김일규, 조현영, 주상현, 편영훈, 정범상, 배상필, 조현우,
소속 상세정보
양정은 ( Yang Jung-Eun ) - 인하대학교 의과대학 치과학교실 구강악안면외과
김일규 ( Kim Ill-Kyu ) - 인하대학교 의과대학 치과학교실 구강악안면외과
조현영 ( Cho Hyun-Young ) - 인하대학교 의과대학 치과학교실 구강악안면외과
주상현 ( Ju Sang-Hyun ) - 인하대학교 의과대학 치과학교실 구강악안면외과
편영훈 ( Pyun Young-Hoon ) - 인하대학교 의과대학 치과학교실 구강악안면외과
정범상 ( Jung Bum-Sang ) - 인하대학교 의과대학 치과학교실 구강악안면외과
배상필 ( Pae Sang-Pill ) - 인하대학교 의과대학 치과학교실 구강악안면외과
조현우 ( Cho Hyun-Woo ) - 인하대학교 의과대학 치과학교실 구강악안면외과
KMID : 0360120120340060413
Abstract
Purpose: The purpose of this setback genioplasty study is to develop a prediction method for the calculated osteotomy angle using horizontal and vertical changes as well as to evaluate the proportion of hard and soft tissue changes.
Methods: Twelve patients who had received setback genioplasty with other maxillofacial surgery were examined. Three lateral cephalograms were taken just before surgery, immediately after surgery, and 3 months later surgery. A reference line was established to the reference point of the inner most point of the lingual symphysis cortex, incisor tip, and 2nd molar cusp tip. Measuring was conducted from pogonion (Pg), menton (Me), labrale inferius (Li), Mentolabial fold, soft tissue pogonion (Pg’), and soft tissue menton (Me’) to the reference lines.
Results: In setback genioplasty, the skeletal Pg moved posteriorly 5.07 mm. The ratios of soft tissue to hard tissue movement were 36% posteriorly and 62% inferiorly at Pg’, 67% posteriorly and 104% inferiorly at Me’, and 34% anteriorly and 164% posteriorly at Li. In reduction & setback genioplasty, skeletal Pg moved posteriorly 4.63 mm and skeletal Me moved superiorly 3.63 mm. The ratios of soft tissue to hard tissue movement were 76% posteriorly and 18% superiorly at Pg’, 68% posteriorly and 42% superiorly at Me’, and 44% anteriorly, 124% posteriorly at Li. The calculated mean slope angle, based on ${\Delta}H/{\Delta}V$ 수식 이미지 ratio, was 61.25 and the measured mean slope angle was 60.17. Thus, the calculated and measured slope angles have a similarity.
Conclusion: In setback genioplasty, soft tissue moves posteriorly and inferiorly. In particular, at the Me’ and Pg’, the inferior movement of the soft tissue is greater than the posterior movement. Also, the predictable results (measured slope angle) after operation can be achieved by the calculated slope angle. Thus, the relationship of soft and hard tissue changes must be considered as the results are predictable.
키워드
Osteotomy;Genioplasty;Soft tissue
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