Orthodontic treatment time in 2- and 4-premolar-extraction protocols

Janson, Guilherme; Maria, Fábio Rogério Torres; Barros, Sérgio Estelita; Freitas, Marcos Roberto de; Henriques, José Fernando Castanha

doi:10.1016/j.ajodo.2005.12.026

Cited by 61 publications

(82 citation statements)

References 31 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…This has been an ongoing concern of orthodontists. Although significant relationships between duration of treatment and the decision to extract, or not, have been widely observed in the literature, 5,6,8,9,15,16,18,19,20,21,23,24 this study could not find a significant relationship between these variables, concluding that the decision to extract or not does not affect treatment time. This outcome resembles the findings of Beckwith et al, 4 Poppwich et al, 10 and Bhattarai et al 17 As documented in the literature, patient sex had no impact on the duration of treatment.…”

Section: Resultscontrasting

confidence: 46%

See 1 more Smart Citation

Factors related to orthodontic treatment time in adult patients

Melo

Carneiro

Pontes

et al. 2013

Dental Press J. Orthod.

View full text Add to dashboard Cite

Introduction:The length of time that it takes an orthodontist to treat adult patients varies widely. Objective: The aim of this study was to investigate how different variables influence treatment time. Methods: Seventy clinical case reports of successfully treated adult patients were examined. The patients were selected from 4,723 records held by three experienced orthodontists. The influence exerted by the following variables on treatment time was assessed: age, sex, facial pattern, severity of malocclusion (measured by the PAR index), sagittal relationship of canines, type of brackets (ceramic or metal), tooth extractions, missed appointments and orthodontic appliance issues/breakages, the latter being the dependent variable. Assessment was performed by multiple linear regression analysis, followed by the stepwise method with P < 0.05. Results: The number of times a patient missed their appointment (no-show) (R 2 = 14.4%, p < 0.0001) and the number of appliance issues/breakages (R 2 = 29.71%, p = 0.0037) significantly affected variability in treatment time, and these two variables together can predict 43.75% (R 2 total) of the overall variability in treatment time. Other factors, such as canine relationship at the beginning of treatment, bracket type (metal or ceramic), tooth extractions, age at start of treatment, severity of the initial malocclusion, sex and facial pattern had no significant bearing on treatment time. Conclusions:The duration of orthodontic treatment in adults, when performed by experienced orthodontists, is mainly influenced by factors related to patient compliance. However, several factors which were not included in this study may contribute to variability in orthodontic treatment time.Keywords: Adult. Time factors. Orthodontics.Introdução: o tratamento ortodôntico de pacientes adultos apresenta grande variabilidade no tempo necessário para sua realização. Objetivo: o objetivo desse trabalho foi investigar a influência de diversas variáveis sobre o tempo de tratamento. Métodos: foram examinados 70 casos clínicos, de pacientes adultos, com bom resultado final, coletados em clínicas de três ortodontistas experientes, cujo acervo total inicial era de 4.723 prontuários. A influência das variáveis idade, sexo, padrão facial, severidade inicial da má oclusão (medida por meio do índice PAR), relação sagital de caninos, tipo de braquetes (estético ou metálico), exodontias, faltas às consultas e "quebras" de aparelho, sobre o tempo de tratamento (variável dependente), foram avaliadas por meio da análise de regressão linear múltipla, seguida do método Stepwise, com p < 0,05. Resultados: a quantidade de faltas (R 2 = 14,04%, p < 0,0001) e o número de "quebras" do aparelho (R 2 = 29,71%, p = 0,0037) tiveram influência significativa na variação do tempo de tratamento, sendo essas duas variáveis juntas capazes de prever 43,75% (R 2 total) da variação no tempo de tratamento. Outros fatores, como a relação de caninos ao início do tratamento, o tipo de braquete usado (metálico ou cerâmico), exodontias, a ...

show abstract

Section: Resultscontrasting

confidence: 46%

“…Moreover, some studies indicate that extractions may lengthen treatment time, compared to non-extraction therapy. 5,6,8,9,15,16,[18][19][20][21]23,24 These results, however, are not unanimous. l4,10,17,22 Another factor that yields conflicting results in the literature is initial severity of the malocclusion.…”

mentioning

confidence: 65%

Factors related to orthodontic treatment time in adult patients

Melo

Carneiro

Pontes

et al. 2013

Dental Press J. Orthod.

View full text Add to dashboard Cite

show abstract

“…This implies that extraction in the maxillary arch was more frequently performed in patients with skeletal Class II malocclusion. The lower pretreatment overbite depth index value in the 4-ext group might be associated with lingual tipping of the incisors according to the ''drawbridge principle'' described by Janson et al 21 However, there was no significant difference in pretreatment occlusal contact area and force among the three groups (non-ext, 2-ext, 4-ext).…”

Section: Discussionmentioning

confidence: 44%

“…12 In a previous study, occlusal contact area and force were reported to be greater in male patients than in female patients. Further, the occlusal contact area was reported to be larger in patients aged 40 years, while there was no statistically significant difference in the occlusal contact area among the three age groups (11)(12)(13)(14)(15)(16)(17)(18)(19)(20)(21)(22)(23)(24)(25)(26)(27)(28)(29)(30), and 31-40 years).…”

Section: Discussionmentioning

confidence: 99%

Changes in occlusal function after extraction of premolars: 2-year follow-up

Yoon

Hwang

Chung

et al. 2017

The Angle Orthodontist

View full text Add to dashboard Cite

Objective: To determine the effects of extraction and the number of teeth extracted on changes in occlusal function by measuring occlusal contact area and force before and after orthodontic treatment with a fixed appliance. Materials and Methods: Female patients treated with a fixed appliance were divided into nonextraction (n ¼ 36), two maxillary premolar extraction (n ¼ 31), and four premolar extraction (n ¼ 18) groups. Bite pressure-sensitive films were used to analyze the occlusal contact area and force. Measurements were performed before treatment (Pre-Tx), immediately afterward (After-Tx), and 2 years later (2Y After-Tx). The data were analyzed using a linear mixed model and the post hoc Bonferroni test. Results: The occlusal contact area and force after treatment decreased significantly compared with Pre-Tx values but were increased 2 years later in all groups. There were no significant differences in occlusal contact area or force during the entire observation period among the three groups (P . .05). The occlusal contact area and force in the nonextraction and two maxillary premolar extraction groups recovered to Pre-Tx levels 2 years later (P . .05). The occlusal contact area in the four premolar extraction group was significantly lower than the Pre-Tx level after 2 years of retention (P , .05). Conclusions: The occlusal contact area and force showed a tendency to decrease immediately after treatment and then gradually increase to pretreatment levels during the observation period. However, the occlusal contact area did not recover fully after 2 years in the four premolar extraction group. (Angle Orthod. 2017;87:703-708.)

show abstract

“…In our patient, treatment was completed in 13 months, which was markedly shorter than usual extraction treatments (13,14). It was previously reported that boys with ASD have a lower bone mineral density than controls (15).…”

Section: Discussionmentioning

confidence: 69%

Extraction Orthodontic Treatment in an Autistic Patient

Özsoy

Bingöl

2017

Turk J Orthod

View full text Add to dashboard Cite

Autism is a condition that restricts brain development. Early diagnostic criteria are as follows: less responsive to social stimuli, inability to develop natural speaking skills, lack of communication skills, and limited and repetitive behaviors. Orthodontic treatment is a challenging process for doctors in autistic patients. The clinical and cephalometric examination of a 17-year and 7-month-old autistic patient revealed class I malocclusion, increased vertical dimensions, proclined upper and lower incisors, and inconsistent lip closure. The treatment plan involved four premolar extractions from each quadrant. Upper and lower 1. premolar extraction with fixed treatment caused reduction in vertical dimensions and significant improvement in lip closure and incisor inclination. Due to the increased metabolic activity in these patients, treatment was completed in 13 months. As a result, autistic patients can be successfully treated. In this process, it is important to include communication as a major part of treatment.

show abstract

Orthodontic treatment time in 2- and 4-premolar-extraction protocols

Cited by 61 publications

References 31 publications

Factors related to orthodontic treatment time in adult patients

Factors related to orthodontic treatment time in adult patients

Changes in occlusal function after extraction of premolars: 2-year follow-up

Extraction Orthodontic Treatment in an Autistic Patient

Contact Info

Product

Resources

About