Orthodontic and orthopaedic changes associated with treatment in subjects with Class III malocclusions

Kama, Jalen Devecioğlu; Özer, Törün; Baran, Sedat

doi:10.1093/ejo/cjl011

Cited by 53 publications

(33 citation statements)

References 25 publications

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“…[1][2][3][4] When a patient's problems include a combination of maxillary retrusion and mandibular protrusion, combined treatment with maxillary protraction and a chincup has been demonstrated to be effective for correcting the skeletal discrepancy. [5][6][7] Yoshida et al 7 found that the combined use of a maxillary protraction appliance and a chincup was effective in correcting intermaxillary and interarch discrepancies, although moderate rebound-like changes occurred in mandibular size and position at the end of pubertal growth.…”

Section: Introductionmentioning

confidence: 99%

Long-term stability of rapid maxillary expansion combined with chincup protraction followed by fixed appliances

Palma

Tejedor-Sanz

Oteo

et al. 2015

The Angle Orthodontist

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Objective: To analyze the long-term stability of rapid maxillary expansion (RME) and protraction from chincup therapy in girls with Class III malocclusion. Materials and Methods: Twenty-two girls (mean age 5 9.1 6 0.6 years) with Class III malocclusion were treated with combined RME and protraction from a chincup, followed by fixed appliances. Lateral cephalograms were evaluated before treatment, at the end of a two-phase treatment protocol (mean age 5 15.1 6 1.1 years), and 10.9 6 0.5 years after the end of treatment (mean age 5 27.5 6 0.5 years). The control group consisted of 22 matched girls with skeletal Class I malocclusion. Results: After treatment, the Class III group showed significant improvement of the Class III malocclusion, mainly due to changes in the mandible (ie, SNB angle decreased 1.8 6 1.6u) and significant improvement of the sagittal maxillomandibular relationship (Wits appraisal increased 2.6 6 2.1 mm; ANB angle increased 1.0 6 0.3 mm). These changes remained stable for an average of 10 years after the end of therapy. No tendency toward relapse was detected, and the mandibular position showed favorable outcomes. Conclusions: RME and protraction from chincup therapy led to successful long-term outcomes in 18 of 22 patients (81.8%). This treatment approach can be considered an efficient therapy in growing girls with mild skeletal Class III malocclusion caused by maxillary retrusion and mandibular protrusion. (Angle Orthod. 2015;85:270-277.)

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Section: Introductionmentioning

confidence: 99%

Long-term stability of rapid maxillary expansion combined with chincup protraction followed by fixed appliances

Palma

Tejedor-Sanz

Oteo

et al. 2015

The Angle Orthodontist

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“…[1][2][3][4][5] This malocclusion is considered one of the most difficult to treat. 5,6 Nongrowing patients with skeletal Class III malocclusion could be treated by orthognathic surgery or orthodontic camouflage treatment. In severe cases, surgical procedures should be performed to correct the skeletal and dental discrepancies, as well as to improve facial esthetics and harmonize the profile.…”

Section: Introductionmentioning

confidence: 99%

Camouflage treatment of skeletal Class III malocclusion with multiloop edgewise arch wire and modified Class III elastics by maxillary mini-implant anchorage

Gao

Wamalwa³

et al. 2013

The Angle Orthodontist

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Objective: To evaluate the effect of the multiloop edgewise arch wire (MEAW) technique with maxillary mini-implants in the camouflage treatment of skeletal Class III malocclusion. Materials and Methods: Twenty patients were treated with the MEAW technique and modified Class III elastics from the maxillary mini-implants. Twenty-four patients were treated with MEAW and long Class III elastics from the upper second molars as control. Lateral cephalometric radiographs were obtained and analyzed before and after treatment, and 1 year after retention. Results: Satisfactory occlusion was established in both groups. Through principal component analysis, it could be concluded the anterior-posterior dental position, skeletal sagittal and vertical position, and upper molar vertical position changed within groups and between groups; vertical lower teeth position and Wits distance changed in the experimental group and between groups. In the experimental group, the lower incisors tipped lingually 2.7 mm and extruded 2.4 mm. The lingual inclination of the lower incisors increased 3.5u. The mandibular first molars tipped distally 9.1u and intruded 0.4 mm. Their cusps moved 3.4 mm distally. In the control group, the upper incisors proclined 3u, and the upper first molar extruded 2 mm. SN-MP increased 1.6u and S-Go/N-ME decreased 1. Conclusions: The MEAW technique combined with modified Class III elastics by maxillary miniimplants can effectively tip the mandibular molars distally without any extrusion and tip the lower incisors lingually with extrusion to camouflage skeletal Class III malocclusions. Clockwise rotation of the mandible and further proclination of upper incisors can be avoided. The MEAW technique and modified Class III elastics provided an appropriate treatment strategy especially for patients with high angle and open bite tendency. (Angle Orthod. 2013;83:630-640.)

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“…A direção do vetor de força para frente e para baixo apresentou inclinação mínima de 20 graus 16,20,39,41,43,44,45 e máxima de 45 graus 13,30 em relação ao Plano Oclusal. A inclinação média determinada neste trabalho foi de 27,5º em relação ao Plano Oclusal, semelhante com a recomendação da maioria dos estudos 15,19,22,23,25,27,28,29,[31][32][33][34][35] .…”

Section: Discussionunclassified

“…Diversos estudos 16,20,40,42,44,45,46 relataram o uso do vetor força com 20º em relação ao Plano Oclusal.…”

Section: Direção Do Vetor De Forçaunclassified

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O tratamento da Classe III: revisão sistemática - Parte I. Magnitude, direção e duração das forças na protração maxilar

Perrone¹,

Mucha²

2009

Rev. Dent. Press Ortodon. Ortop. Facial

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Introdução: para o tratamento da Classe III durante o crescimento, a protração maxilar é a terapia mais relatada na literatura. Durante o tratamento, é requerida especial atenção à mecânica utilizada para a correção do problema. Objetivo: sintetizar as informações relativas à magnitude, direção e tempo diário da aplicação das forças, por meio de uma revisão sistemática. Métodos: estudos foram identificados a partir de uma pesquisa eletrônica no Medline database -Entrez PubMed (178 artigos) e Bireme (550 artigos), no período de janeiro de 1983 a dezembro de 2008. Após um criterioso processo de inclusão e exclusão, 56 estudos primários foram selecionados e submetidos a um segundo processo de seleção, restando 39 artigos. Foram calculados a média e o desvio-padrão, bem como os valores mínimos e máximos para a magnitude, a direção e a quantidade de horas de uso das forças de protração maxilar. Resultados e Conclusão: as mé-dias de magnitude, direção e duração das forças de protração maxilar foram de, respectivamente, 447,8 gramas, 27,5 graus de inclinação em relação ao Plano Oclusal, e 15,2 horas por dia. INTRODUÇÃOA etiologia multifatorial e a dificuldade de prever o padrão de crescimento do complexo craniofacial contribuem para que o tratamento da Classe III seja desafiador. Essa pode ser caracterizada pelo retrognatismo maxilar, prognatismo mandibular ou a combinação de ambos. Entretanto, a retrusão da maxila foi considerada a situação mais comum 1,42 . Uma pesquisa realizada em latinos 36 mostrou sua incidência em 5% da população estudada, a qual variou de 3,3% a 4,4% na população brasileira 7 . Em estudos na população asiática, observou-se uma incidência maior, variando de 9% a 19%, sendo sua prevalência em torno de 16,7% em pacientes coreanos 18 .Várias são as possibilidades de tratamento para a Classe III. Todavia, a maioria dos autores são unâ-nimes em considerar a protração maxilar associada ou não à expansão palatina rápida como a melhor terapia para os pacientes em fase de crescimento 1,2,12,21,24,32,40,41,43 .Diferentes tipos de dispositivos utilizados como ancoragem extrabucal para protração maxilar já foram descritos na literatura, como: máscara facial tipo Delaire, máscara facial tipo Petit, máscara facial de Turley e Sky Hook, entre outros 2,21 .

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Orthodontic and orthopaedic changes associated with treatment in subjects with Class III malocclusions

Cited by 53 publications

References 25 publications

Long-term stability of rapid maxillary expansion combined with chincup protraction followed by fixed appliances

Long-term stability of rapid maxillary expansion combined with chincup protraction followed by fixed appliances

Camouflage treatment of skeletal Class III malocclusion with multiloop edgewise arch wire and modified Class III elastics by maxillary mini-implant anchorage

O tratamento da Classe III: revisão sistemática - Parte I. Magnitude, direção e duração das forças na protração maxilar

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