En-masse 견인에 의한 발치공간 폐쇄 후 상악치열의 이동양상 -제1소구치 및 제2소구치 발치 비교
Spatial changes of the upper dentition following en-masse space closure: A comparison between first and second premolar extraction
2
조회
0
다운로드
0
인용
0
참고문헌
키워드
초록
제1소구치 또는 제2소구치 발치 후 발치공간 폐쇄 시 치아이동의 양상 즉, 치아이동방향과 이동량을 구명하는 것이 본 연구의 목적이었다. 상악 우측 인공 치조골부에 제1소구치 또는 제2소구치를 제외한 중절치부터 제2대구치까지 실험용 치아들을 식립하고 bull loop이 형성된 반쪽 호선에 15도의 gable bend를 부여한 후 전치부를 후방견인하여 발치공간을 폐쇄시켰다. 실험 전후에 교합면 방사선사진과 시상면 방사선사진을 촬영하고 인공치조골부 하단에 식립된 기준표지점에 중첩하여 이동방향 및 이동량을 계측하였다. 그 결과 제2소구치 발치군의 전치부 후방이동량이 제1소구치 발치군에 비해 더 적었으며 구치부의 고정원 소실 및 고정원의 근심설측회전량은 제2소구치 발치군에서 더 크게 나타났다.
Abstract
The purpose of this experimental study was to evaluate and compare maxillary arch dimensional and positional changes between first and second premolar extraction groups. The Calorific Machine was used to illustrate tooth movement in three dimensions. The experimental teeth except the first or second premolars were embedded in artificial alveolar bone. The extraction space was closed using arch wires with bull loops into which 15 degree gable bends were placed. Before and after space closure, radiographs were taken in the sagittal and occlusal directions using occlusal films. The results showed greater mean maxillary incisor retraction and less anchorage loss in the maxillary first premolar extraction group than in the maxillary second premolar extraction group. Mesiopalatal rotation of anchor teeth was greater after extraction of a maxillary second premolar than a maxillary first premolar (p <.001).
참고문헌 (23)
- "Long-term assessment of orthodontic relapse", 82, pp.456~63 (1982)
- "Stability and relapse of mandibular anterior alignment-First premolar extraction cases treated by traditional edgewise orthodontics", 80, pp.349~65 (1981)
- "Treatment and postretention changes in dental arch width dimensions-a long term evaluation of influencing cofactors", 109, pp.368~78 (1996)
- "1986 JCO study of orthodontic diagnosis and treatment procedures", 20, pp.612~25 (1986)
- "1996 JCO study of orthodontic diagnosis and treatment procedures", 30, pp.615~29 (1996)
- "Forty-year review of extraction frequencies at a university orthodontic clinic", 64, pp.407~14 (1994)
- "Long term results of premolar extractions in orthodontic treatment", 5, pp.61~6 (1978)
- "An occlusal and cephalometric analysis of maxillary first and second premolar extraction effects", 71, pp.90~102 (2001)
- "An occlusal and cephalometric analysis of mandibular first and second premolar extraction effects", 117, pp.351~61 (2000)
- "Arch width and form:a review", 115, pp.305~13 (1999)
- "An analysis of second premolar extraction procedures", 34, pp.292~302 (1964)
- "The effect of different extraction sites upon incisor retraction", 69, pp.388~410 (1976)
- "Therapeutic changes in extraction versus non-extraction orthodontic treatment", 20, pp.225~36 (1998)
- "A comparison between friction and frictionless mechanics with a new typodont simulation system", 119, pp.292~9 (2001)
- "Precision-TPA를 이용한 구치부 회전시 근심 및 원심 삽입법에 따른 동적인 치아이동 양상에 관한 실험 연구", 29, pp.425~33 (1999)
- "Different extractions for different malocclusion", 68, pp.15~41 (1975)
- "Differential premolar extractions", 112, pp.480~6 (1997)
- "Contemporary Orthodontics", pp.308~11 (1999), Mosby
- "상악전치 후방 견인시 견인 loop 후방에 부여한 gable bend 양에 따른 치아이동 양상에 관한 연구", 34, pp.33~45 (2004)
- "Where teeth should be positioned in the face and jaws and how to get them there", 31, pp.586~608 (1997)
- "The effects of premolar-extraction a long-term comparison of outcomes in", pp.257~72
- "Long- term changes in arch form after orthodontic treatment and retention", pp.518~30
- "Facial keys to orthodontic diagnosis and treatment planning- Part Ⅱ", 103, pp.395~411 (1993)