• Title/Summary/Keyword: Upper molar distalization

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Frog appliance를 이용한 상악 대구치의 원심 이동: 증례 보고 (The frog appliance for upper molar distalization: a case report)

  • Bayram, Mehmet;Nor, Metin;Kilkis, Dogan
    • 대한치과교정학회지
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    • 제40권1호
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    • pp.50-60
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    • 2010
  • 본고의 목적은 2급 1류 치열안면 구조를 가지는 한 환자에 적용된 새로이 고안된 상악 대구치 원심 이동 장치인 Frog appliance의 효과를 평가하기 위함이다. 11세의 여자 환자가 교정 치료를 위해 본 진료실로 의뢰되었다. 환자는 미약한 2급 골격관계와 2급의 대구치 및 견치 관계를 양측 모두에서 보이고 있었다. 고정성 장치 치료를 통해 양측 상악 제1대구치를 원심 이동시키는 방법을 포함하는 치료 계획을 수립하였으며 상악 대구치를 원심 이동하기 위해 새로이 고안된 Frog appliance를 제작 및 적용하였다. 측모 두부방사선 사진으로 치료 결과를 평가하였으며 상악 제1대구치의 원심 이동이 4개월의 치료 기간 동안 이루어 졌고 1급의 구치 관계가 얻어졌다. 총 치료 기간은 16개월이 소요되었다. 두부방사선 사진을 평가한 결과 약간의 고정원 상실과 함께 대구치의 원심 이동이 치축 이동에 가깝게 일어난 것을 확인하였다. 결론적으로 Frog appliance는 환자의 협조를 요하지 않는 장치로서 간단하고 효과적으로 양측 대구치의 원심이동을 이룰 수 있는 구내 장치이다.

Zygoma-gear를 이용한 구치부 후방이동을 통한 비발치 치험례 (Zygoma-gear appliance for intraoral upper molar distalization)

  • Nur, Metin;Bayram, Mehmet;Pampu, Alper
    • 대한치과교정학회지
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    • 제40권3호
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    • pp.195-206
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    • 2010
  • 본 증례보고에서는 골격성 II급 관계를 보이는 16세 여자 환자에서 zygomatic-anchorage plates (Zygoma-gear Appliance, ZGA)를 이용하여 상악 구치를 후방 이동시킴 구내 장치를 소개하고자 한다. 이 장치는 양측성 zygomatic anchorage plates, inner-bow와 강한 힘을 내는 구강 내 고무줄로 구성되어 있다. 3개월 내에 상악 구치의 후방 이동이 이루어 졌으며, 측모 두부 방사선 사진 분석 결과, 상악 구치는 4mm 후방 이동, $4.5^{\circ}$ 후방 경사되었다. 본 연구 결과 ZGA 장치를 이용해 고정원 소실 없이 단기간에 상악 구치의 후방 이동이 효과적으로 이루어졌음이 확인되었으며, 이를 통해 구치의 후방 견인이 요하는 증례에서 구외 장치 대신 사용될 수 있을 것으로 판단된다.

A reliable method for evaluating upper molar distalization: Superimposition of three-dimensional digital models

  • Nalcaci, Ruhi;Kocoglu-Altan, Ayse Burcu;Bicakci, Ali Altug;Ozturk, Firat;Babacan, Hasan
    • 대한치과교정학회지
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    • 제45권2호
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    • pp.82-88
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    • 2015
  • Objective: The aim of this study was to evaluate the reliability of measurements obtained after the superimposition of three-dimensional (3D) digital models by comparing them with those obtained from lateral cephalometric radiographs and photocopies of plaster models for the evaluation of upper molar distalization. Methods: Data were collected from plaster models and lateral cephalometric radiographs of 20 Class II patients whose maxillary first molars were distalized with an intraoral distalizer. The posterior movements of the maxillary first molars were evaluated using lateral cephalometric radiographs (group CP), photocopies of plaster models (group PH), and digitized 3D models (group TD). Additionally, distalization and expansion of the other teeth and the degrees of molar rotation were measured in group PH and group TD and compared between the two groups. Results: No significant difference was observed regarding the amount of molar distalization among the three groups. A comparison of the aforementioned parameters between group PH and group TD did not reveal any significant difference. Conclusions: 3D digital models are reliable to assess the results of upper molar distalization and can be considered a valid alternative to conventional measurement methods.

미니스크류를 이용한 상악구치부 후방이동장치 효과 (Noncompliance screw supported maxillary molar distalization in a parallel manner)

  • Nalcaci, Ruhi;Bicakci, Ali Altug;Ozan, Fatih
    • 대한치과교정학회지
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    • 제40권4호
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    • pp.250-259
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    • 2010
  • 상악 구치의 후방이동을 위한 구강 내 장치 중 환자의 협조를 필요로 하지 않는 방법은 제II급 부정교합의 개선에 성공적으로 널리 사용되고 있다. 본 연구는 스크류에 의해 지지되는 구강 내 후방이동 장치를 소개하고 그 효율성을 조사하고자 하였다. Angle Class II 부정교합으로 진단된 21명의 환자(여자 11명, 남자 10명; 평균 연령 14.9세)를 대상으로 하였다. 2개의 스크류를 incisive foramen 후방에 식립하고, 식립한 즉시 힘을 주어 상악 제1대구치의 후방이동에 사용하였다. 상악 구치를 후방이동시켜 제I급 구치관계를 얻기 위해 스크류에 의해 지지되는 구강 내 후방이동 장치를 사용하였다. 치료 전후 측모두부 방사선 사진과 3차원 모델 분석을 통해 골격 및 치아의 변화를 평가하였다. 연구결과 상악 구치는 평균 3.95 mm 후방이동하였고, 추가적인 고정원 소실 없이 제I급 구치관계를 확립하였다. 상악 대구치는 $1.49^{\circ}$ 후방경사 되었고, 회전된 정도는 좌우 각각 $0.74^{\circ}$, $0.54^{\circ}$으로 통계적으로 유의성 있는 변화를 보이지 않았다 (p > 0.05). 새롭게 고안된 장치는 스크류에 의해 지지되어 환자의 협조도를 요하지 않으며 특별한 고정원 소실 없이 구치의 치체이동을 통한 후방이동을 얻는 데 효과적인 것으로 판단된다.

Analysis of midpalatal miniscrew-assisted maxillary molar distalization patterns with simultaneous use of fixed appliances: A preliminary study

  • Mah, Su-Jung;Kim, Ji-Eun;Ahn, Eun Jin;Nam, Jong-Hyun;Kim, Ji-Young;Kang, Yoon-Goo
    • 대한치과교정학회지
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    • 제46권1호
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    • pp.55-61
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    • 2016
  • Skeletal anchorage-assisted upper molar distalization has become one of the standard treatment modalities for the correction of Class II malocclusion. The purpose of this study was to analyze maxillary molar movement patterns according to appliance design, with the simultaneous use of buccal fixed orthodontic appliances. The authors devised two distinct types of midpalatal miniscrew-assisted maxillary molar distalizers, a lingual arch type and a pendulum type. Fourteen patients treated with one of the two types of distalizers were enrolled in the study, and the patterns of tooth movement associated with each type were compared. Pre- and post-treatment lateral cephalograms were analyzed. The lingual arch type was associated with relatively bodily upper molar distalization, while the pendulum type was associated with distal tipping with intrusion of the upper molar. Clinicians should be aware of the expected tooth movement associated with each appliance design. Further well designed studies with larger sample sizes are required.

근심이동된 상악 대구치에서 Open Coil Jig 장치를 이용한 치험례 (DISTALIZATION OF THE MESIAL DRIFTED UPPER FIRST MOLAR WITH OPEN COIL JIG IN THE MIXED DENTITION: A CASE REPORT)

  • 김병창;김진태
    • 대한소아치과학회지
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    • 제21권2호
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    • pp.486-490
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    • 1994
  • Maxillary first molar is the key in normal occlusion. Mesial drifting of maxillary first molar result form early loss of second deciduous molar. Mesial drifted maxillary first molar was treated by headgear, Hawley appliance with screw, brasswire, etc. But, these appliance should be necessary for patients cooperation. Recently, several appliance for molar distalizing without patients cooperation has been introduced. We are reporting in this paper about distalizing of mesial drifted maxillary first molar because of early loss of deciduous second molar by open coil jig. Distalization of molar by open coil jig is predictable, rapid, painless method without mecesscity of patient cooperation.

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Treatment effects of mandibular total arch distalization using a ramal plate

  • Yu, Jonghan;Park, Jae Hyun;Bayome, Mohamed;Kim, Sungkon;Kook, Yoon-Ah;Kim, Yoonji;Kim, Chang-Hyen
    • 대한치과교정학회지
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    • 제46권4호
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    • pp.212-219
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    • 2016
  • Objective: The purpose of this study was to evaluate treatment effects after distalization of the mandibular dentition using ramal plates through lateral cephalograms. Methods: Pre- and post-treatment lateral cephalograms and dental casts of 22 adult patients (11 males and 11 females; mean age, $23.9{\pm}5.52years$) who received ramal plates for mandibular molar distalization were analyzed. The treatment effects and amount of distalization of the mandibular molars were calculated and tested for statistical significance. The significance level was set at p < 0.001. Results: The mandibular first molar distalization at the crown and root were 2.10 mm (p < 0.001) and 0.81 mm (p = 0.011), respectively. In the evaluation of skeletal variables, there was a significant increase in the Wits appraisal (p < 0.001). In the evaluation of the soft tissue, there was no significant effect on upper lip position, but the lower lips showed a significant retraction of 2.2 mm (p < 0.001). Conclusions: The mandibular molars showed a significant amount of distalization accompanied by limited extrusion and mesiobuccal rotation of the crowns. A ramal plate may be a viable device for mandibular total arch distalization in Class III patients who are reluctant to undergo orthognathic surgery.

C-activator를 이용한 성장기 II급 부정교합환자의 구치부 원심이동 치험례 (C-activator treatment for distalization of maxillary molars in Class II anterior deep bite malocclusion)

  • 김성훈;정규림;국윤아
    • 대한치과교정학회지
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    • 제34권3호
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    • pp.269-277
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    • 2004
  • 혼합 치열기의 교정치료 증례 중에서 경도의 총생을 가진 경우 상악 대구치를 원심 이동함으로서 양호한 치료의 결과를 얻는 경우가 많다 주로 악외 견인장치를 적용하여 원심이동을 시행하지만 환자의 협조도에 따라 구치의 원심이동이 결정되는 단점을 가지고 있다. 구강내 고정원 사용시 생길 수 있는 반작용을 최소화하기 위해 정에 의해 개발된 C-space regainer는 후방이동 시키고자 하는 치아를 제외한 거의 모든 치아들을 완벽하게 묶음으로서 효과적인 후방이동을 가능케 하는 장치이다. 후속영구치의 맹출 공간 부족으로 매복 치에 의한 인접치의 치근손상이 예상되는 성장기 II급 부정교합 환자에서 악기능 교정장치에 t-space regainer의 개념을 적용한 변형된 C-space regainer, 즉 C-activator가 사용되어 양호한 치료 결과를 얻었기에 이어 보고하는 바이다.

Distalization with a modified C-palatal plate for severe upper crowding and a missing lower incisor

  • Park, Jae Hyun;Saito, Traci;Yoo, Sun Kyong;Alfaifi, Mohammed;Kook, Yoon-Ah
    • 대한치과교정학회지
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    • 제50권1호
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    • pp.52-62
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    • 2020
  • This case report presents the orthodontic treatment of a 25-year-old patient with skeletal Class II and severe maxillary arch crowding, moderate mandibular arch crowding, anterior crossbite, and a missing lower incisor. He was treated with molar distalization using a modified C-palatal plate and temporary anchorage devices to create sufficient space for retraction. The total treatment duration was 21 months. After treatment, his occlusion and smile esthetics showed significant improvement. The modified C-palatal plate represents a treatment modality that enhances the prospects of non-extraction treatment and reduces the need for extraction.

상악 제 2 대구치 발거에 의한 교정치료의 효과 (A STUDY ON TREATMENT EFFECTS OF MAXILLARY SECOND MOLAR EXTRACTION CASES)

  • 정규림;박영국;이영준;이성희;김성훈
    • 구강회복응용과학지
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    • 제16권2호
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    • pp.93-104
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    • 2000
  • Orthodontic treatment in conjunction with second-molar extraction has been a controversial issue among orthodontists over many decades. The aim of this study was to investigate the treatment effects of upper second molar extraction cases. The sample included 19 upper second molar extraction orthodontic cases(ten Angle's Class I's and nine Class II's, average age=13Y 6M) cared at Kyung-Hee University Department of Orthodontics. Lateral cephalometric radiographs were taken before and immediately after treatment. Seventy-nine points were digitized on each cephalogram and 38 cephalometric parameters were computed comprising 22 angular measurements, 13 linear measurements, and 3 facial proportions. The data obtained from each malocclusion group were analyzed by paired t-test. The statistical results disclosed that there was no significant change in skeletal pattern after treatment except for that accountable by growth while there was statistically significant change in dentoalveolar and soft tissue patterns. There were no significant changes in Bjork sum, posterior facial height /anterior facial height and lower anterior facial height /anterior facial height. No significant changes in anteroposterior position of maxilla and palatal plane were manifested. Although facial axis and lower facial height was slightly increased and the mandible was rotated backward and downward, there was no remarkable change in the mandibular plane. There were statistically significant changes in distal movement of upper first molar, molar key correction and overjet reduction while there was no change in the occlusal plane. The upper lip was slightly retracted simultaneously with slight increase in nasolabial angle. These results signify that distalization of upper dentition with the second molar extraction does change occlusal relationship without gross modifications in the craniofacial skeletal configurationson. Henceforth the second molar extracted would be recommended to treat severe anterior crowding and protrusion with minor skeletal discrepancy.

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