• 제목/요약/키워드: Protraction

검색결과 106건 처리시간 0.027초

상악골 전방견인 후 경조직과 연조직의 재발에 관한 연구 (THE STDUY OF THE RELAPSE OF HARD AND SOFT TISSUE AFTER MAXILLARY PROTRACTION)

  • 양준호;박수병;손우성
    • 대한치과교정학회지
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    • 제27권3호
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    • pp.373-389
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    • 1997
  • 본 연구는 성장기 아동 중 골격성 III급 부정교합 환자에서 구외력을 이용한 상악골 전방견인시에 발생하는 경조직과 연조직의 변화와 상악골 전방견인 장치의 제거 후 관찰되는 경조직과 연조직의 재발 양상 및 이들의 상관성을 알아 보고자 하였다. 부산대학교병원 치과교정과에 내원하여 상악골 열성장을 동반하는 골격성 III급 부정교합으로 진단받은 아동 중 안면 비대칭과 순구개열이 없고 상악골 전방견인 치료 전이나 후에 상하악에서 고정성 또는 가철성 장치를 사용하지 않은 29명 (남자 10명, 여자 19명 )을 대상으로 상악골 전방견인 전,후와 장치제거 후 1-3개월때 채득한 측모두부 방사선 규격사진을 계측,분석하여 다음과 같은 결과를 얻었다. 1. 상악골 전방견인에 의하여 상순부 연조직은 그 하방 경조직과 함께 전하방 이동되었고 하순부 연조직은 경조직의 변화에도 불구하고 수평적으로는 비교적 안정적이었다. 2. 상악골 전방견인 장치제거 후 상하 전치의 재발양상에도 불구하고 상하순 모두 수평방향으로는 비교적 안정적이었으며 수직방향으로는 전방견인 후보다 더 하방이동 하였다. 3. 상악골 전방견인에 의하여 상악골과 상악치열이 전방 이동되었고 구개평면은 전상방 회전되었으며 하악골과 하악치열은 하후방 회전되었다. 4. 상악골 전방견인 장치제거 후 악골의 위치는 비교적 안정적이었으나 상하 전치의 치축과 전상방 회전되었던 구개평면이 치료 전 위치로 재발되었다. 5. 경조직과 연조직의 상관성 검정에서 입술의 위치는 그 하방 경조직과 밀접한 상관성을 보였다.

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Comprehensive Orthodontic Treatment in a Middle-Aged Patient with Missing Maxillary Left First Premolar: A Case Report

  • Kwon, Sun-Mi;Baik, Hyoung-Seon;Choi, Sung-Hwan
    • Journal of Korean Dental Science
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    • 제11권1호
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    • pp.32-41
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    • 2018
  • As the adult population continues to increase, orthodontic treatment for adult patients is becoming more common. This case report describes comprehensive orthodontic treatment of a middle-aged patient with closure of the extraction space without prosthetic restoration. A 55-year-old woman with her maxillary left first premolar extracted because of a periodontal problem, wanted to close the space with orthodontic treatment. Since she had generalized crowding and mild skeletal discrepancy, we planned comprehensive orthodontic treatment, including closure of the extraction space by protraction of the left maxillary molars using miniscrews and aesthetic alignment of anterior teeth. The total treatment period was 28 months. As a result of these treatments, the extraction space was successfully closed, good tooth alignment and satisfactory occlusion were achieved.

하악편측절근환자의 교근활성도에 대한 근전도학적 연구

  • 양재현
    • 대한치과의사협회지
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    • 제12권2호
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    • pp.123-129
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    • 1974
  • The electrical activities of masseter muscle were recorded on 9 subjects with unilateral fracture of mandible. The electromyographic studies were executed with 2 channel RS dynograph recorder for electromyography. The graphs were recorded in the physiologic rest position, incisal occlusion, molar occlusion, left lateral excursion, right lateral excursion, and protraction. The following conclusions were drawn; 1. In the physiologic rest position, incisal occlusion, molar occlusion, and protraction, the electrical potentials of the masseter muscle were greater in the affected side. 2. In the right lateral excursion, the electrical potentials of the masseter muscle were greater in the right side, and in the left lateral excursion, greather in the left side. There is no correlation mutually between the affected side and unaffected side.

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성장기 구순구개열 환자의 악정형 치료에 관한 최신 지견 (Orthopedic treatment of cleft lip and palate child. An update.)

  • 임성훈
    • 대한치과의사협회지
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    • 제55권12호
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    • pp.870-882
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    • 2017
  • Maxillary growth is hindered by the restricting pressure from the scar tissue formed after lip closure and palate closure surgeries of the cleft. Therefore, the anteroposterior skeletal relationship of both jaws exacerbates as patient grows. Conventional facemask treatment is valuable for dentoalveolar compensatory treatment and for very mild maxillary hypoplasia. To achieve further maxillary protraction, bone-anchored facemask or bone-anchored maxillary protraction can be attempted. For moderate maxillary hypoplasia, surgical orthodontic treatment after growth completion can be an efficient treatment reducing uncontrollable problems. For moderate to severe maxillary hypoplasia, distraction osteogenesis (DO) can be used alone or with later surgical orthodontic treatment. To compensate the severe relapse after DO, overcorrection and bone plate placement after DO are recommended. In case of hypernasality, maxillary anterior segmental distraction osteogenesis can be chosen to prevent exacerbation of the hypernasality.

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급속상악확장장치와 Facemask를 이용한 골격성 III급 부정교합 환아의 치험례 (CASE REPORTS ON TREATMENT OF SKELETAL CLASS III MALOCCLUSION WITH RME AND FACEMASK)

  • 김숙의;양규호
    • 대한소아치과학회지
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    • 제25권3호
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    • pp.604-612
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    • 1998
  • The majority of Class III malocclusion have maxillary retrusion. Thus, it becomes obvious that management of most skeletal Class III malocclusion cases should include maxillary protraction as major objective. Additionally, in Class III malocclusion with posterior crossbite, RME "disarticulates" the maxilla and initiates cellular response in the sutures, allowing a more positive reaction to protraction forces. Using facemask with RME helped in correction of skeletal Class III malocclusion by the anterior displacement of maxilla and maxillary dentition, and changing the direction of the growth of mandible. Thus, acceptable improvement in the Class III profile was performed.

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