혼합치열기 전치부 반대교합 아동에서 Fr¨ankel functional regulator Ⅲ의 치료효과
TREATMENT EFFECTS OF FR?NKEL FUNCTIONAL REGULATOR Ⅲ IN MIXED DENTITION CHILDREN WITH ANTERIOR CROSSBITE
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초록
본 연구는 혼합치열기 전치부 반대교합 어린이를 대상으로 FR Ⅲ가 치아와 골격의 성장에 미치는 효과를 평가하고자 하였 다. FR Ⅲ로 처치한 전치부 반대교합을 지닌 30명의 아동(평균나이 7.9 ± 1.1세 : 평균 치료기간 1.5 ± 0.8년)을 대상으 로 치료 전후의 측모 두부방사선 사진을 분석하여 다음과 같은 결과를 얻었다. 1. 상악에 대한 FR Ⅲ의 골격적인 효과는 상악의 하방이동이며, 전방이동은 대조군과 유의한 차이를 보이지 않았다. 2. 하악에 미치는 FR Ⅲ의 골격적인 효과는 하악의 후하방이동과 SNB의 감소이다. 3. 치아에 대한 FR Ⅲ의 효과는 하악 전치 첨부의 후방이동과 수평피개의 증가였다. 이상의 결과로 단기간의 FR Ⅲ 치료는 상악골의 전방이동 촉진효과는 미미하며 상악골의 하방이동, 하악골의 후하방 회 전, 수평피개 증가효과가 있음을 알 수 있었다.
Abstract
The purpose of this study was to evaluate the skeletal and dental effects obtained by the Frankel functional regulator Ⅲ in growing children with Class Ⅲ malocclusions. Cephalometric changes in thirty children at the time of mixed dentition malocclusions (initial mean age, 7.9 ± 1.1 years; mean treatment duration, 1.5 ± 0.8 years) were analysed. The results were as follows : 1. The skeletal effects on the maxilla showed a significant downward displacement whereas forward displacement was not significant in comparison with the control group. 2. The skeletal effects on the mandible showed statistically significant backward and downward displacement. 3. The dental effects showed statistically significant backward movement in the mandibular incisor tip and increase of overjet The results suggested that forward displacement on the maxilla was insufficient and treatment effects were caused mainly by downward displacement of the maxilla, backward and downward rotation of the mandible, and the increase of overjet during short period.
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