Maxillary total arch distalization using midpalatal mini-implant: Case report
2
조회
0
다운로드
0
인용
0
참고문헌
키워드
초록
Orthodontic mini-implant is usually placed in the buccal interdental area for molar distalization or total arch distalization. However, this requires timely replacement of the mini-implant to prevent contact between root and mini-implant and ensuing root resorption. Alternatively, midpalate may be considered as the mini-implant placement site because it has considerably dense bone and there is no interference with roots. Also, distalization forces may be designed to pass through the center of resistance of dentition for translatory distal movement. In this case report, end-on Class II occlusion with lip protrusion was successfully treated by applying distal forces from a transpalatal arch to a lever attached to two midpalatal mini-implants. Anti-rotation bends were bent on transpalatal arch to prevent mesial rotation of first molars during distalization. Another benefit of this approach is that molar distalization may be initiated at the beginning of treatment because distal tipping of molars can be prevented by applying distal force at the level of the center of resistance of molars thus eliminating the need of stiff rectangular archwire. With this approach, time-consuming molar distalization may be initiated at the beginning of treatment and therefore, overall treatment duration can be reduced.
Abstract
Orthodontic mini-implant is usually placed in the buccal interdental area for molar distalization or total arch distalization. However, this requires timely replacement of the mini-implant to prevent contact between root and mini-implant and ensuing root resorption. Alternatively, midpalate may be considered as the mini-implant placement site because it has considerably dense bone and there is no interference with roots. Also, distalization forces may be designed to pass through the center of resistance of dentition for translatory distal movement. In this case report, end-on Class II occlusion with lip protrusion was successfully treated by applying distal forces from a transpalatal arch to a lever attached to two midpalatal mini-implants. Anti-rotation bends were bent on transpalatal arch to prevent mesial rotation of first molars during distalization. Another benefit of this approach is that molar distalization may be initiated at the beginning of treatment because distal tipping of molars can be prevented by applying distal force at the level of the center of resistance of molars thus eliminating the need of stiff rectangular archwire. With this approach, time-consuming molar distalization may be initiated at the beginning of treatment and therefore, overall treatment duration can be reduced.
참고문헌 (12)
- Gregory Stylianos Antonarakis, "Maxillary Molar Distalization with Noncompliance Intramaxillary Appliances in Class II Malocclusion", The Angle Orthodontist, 78(6), pp.1133~1140 (2008), The Angle Orthodontist (EH Angle Education & Research Foundation)[DOI]
- Park HS, "Nonextraction treatment with microscrew implants", Angle Orthod, 74, pp.539~549 (2004)[DOI]
- Keles A, "Bodily distalization of molars with absolute anchorage", Angle Orthod, 73, pp.471~482 (2003)[DOI]
- Kazuyo Yamada, "Distal Movement of Maxillary Molars Using Miniscrew Anchorage in the Buccal Interradicular Region", The Angle Orthodontist, 79(1), pp.78~84 (2009), The Angle Orthodontist (EH Angle Education & Research Foundation)[DOI]
- 마수정, "Analysis of midpalatal miniscrew-assisted maxillary molar distalization patterns with simultaneous use of fixed appliances: A preliminary study", 대한치과교정학회지, 46(1), pp.55~61 (2016), 대한치과교정학회
- Maurício Barbieri Mezomo, "A extração de segundos molares superiores para o tratamento da Classe II", Dental Press Journal of Orthodontics, 15(3), pp.94~105 (2010), FapUNIFESP (SciELO)[DOI]
- Daniela Gamba Garib, "Morfologia alveolar sob a perspectiva da tomografia computadorizada: definindo os limites biológicos para a movimentação dentária", Dental Press Journal of Orthodontics, 15(5), pp.192~205 (2010), FapUNIFESP (SciELO)[DOI]
- 2.0.CO;2,
- 경승현, "미니스크류 식립 부위로서 정중 구개봉합부 골의 두께에 관한 연구", 대한치과교정학회지, 34(1), pp.63~70 (2004), 대한치과교정학회
- Jung MH, "Biomechanical considerations in treatment with miniscrew anchorage. Part 1: the sagittal plane", J Clin Orthod, 42, pp.79~83 (2008)
- Jung MH, "Biomechanical considerations in treatment with miniscrew anchorage. Part 2: the horizontal and transverse planes", J Clin Orthod, 42, pp.144~148 (2008)
- Yu IJ, "Comparison of tooth displacement between buccal miniimplants and palatal plate anchorage for molar distalization:a finite element study", Eur J Orthod, 36, pp.394~402 (2014)[DOI]