Angle씨 1급 부정교합 환자에서 교정치료 전,후의 악궁크기 변화에 관한 연구

Abstract

[한글]

저자는 Angle씨 1급 부정교합 환자의 치료전, 후 및 보정이후의 악궁크기 변화를 연구하기 위하여 Edgewise appliance로 교정치료를 받은 환자 58명(제1소구치 발치군 28명, 비발치군 30명)의 치료전, 후 및 보정후의 석고모형을 대상으로 조사한 바 다음과 같은 결론을 얻었다.

1. 비발치군의 경우 치료기간중 상악 대구치간 폭경, 상악 소구치간 폭경, 하악치열궁 주위장경이 증가하였으나 보정기간중 동 계측치의 감소가 나타났다.

2. 발치군의 경우 치료기간중 하악 대구치간 폭경, 상하악 소구치간 폭경, 하악 치열궁 장경, 상하악 치열궁 주위장경이 감소하였다.

3. Iregularity index는 비발치, 발치군 모두에서 치료기간중 유의성있게 감소하였다.

4. 상하악 대구치간 폭경,상하악 소구치간 폭경, 상하악 치열궁 장경, 상하악 치열궁 주위장경에 관한 악궁크기 변화량은 비발치군과 발치군간에 유의성있는 차이를 나타냈다.

[영문]

The purposes of present study were to identify possible relationships between post-treatment changes and post-retention changes. The patient's models were composed of 58 samples, and were classified non-extraction group (30 samples) and extraction group (28 samples). For each sample the first models were taken prior to the start of treatment, the second models just after the end of treatment, and the third models two years after.

The results were as follows:

1.In the cases of non-extraction group, increases were in intermolar width of maxilla, interbicuspid width of maxilla and arch perimeter of mandible during treatment period, but decreases were in the same measurements during poet-retention period.

2. In the cases of extraction group, decreases were in intermolar width of mandible, interbicuspid widths of maxilla and mandible, arch length of mandible, arch perimeters of maxilla and mandible during treatment period.

3. Significant decreases were in the irregularity index of both extraction and non-extraction group during treatment period.

4. There were significant differences of arch dimensional changes in intermolar widths of maxilla and mandible, interbicuspid widths of maxilla and mandible, arch lengths of maxilla and mandible, arch perimeters of maxilla and mandible between non-extraction and extraction group.