Vertical dimension of the face: Result of four premolar extractions or posterior teeth position

Campos, Marcio J. Silva; Caetano, Paula Liparini; Tanaka, Orlando Motohiro; Faria, Fernanda Ramos de; Vitral, Robert Willer Farinazzo

doi:10.1016/j.ajodo.2018.12.009

American Journal of Orthodontics and Dentofacial Orthopedics

2019

DOI: 10.1016/j.ajodo.2018.12.009

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Vertical dimension of the face: Result of four premolar extractions or posterior teeth position

Marcio J. Silva Campos¹,

Paula Liparini Caetano²,

Orlando Motohiro Tanaka³

et al.

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Cited by 3 publications

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“…In accordance with past no significant differences were detected in these variables between the two groups. Nonetheless, in borderline patients, the treatment decision on extraction did have more pronounced impacts on vertical skeletal measurements 28. However, in our study, when therewas only a trend of differences appearing in indicators such as ANB, SNA, FHI and Wits in the extraction group without statistical significance, the differences in the change of AOP-SN, POP-SN, AOP-POP angle were already significant compared with the non-extraction group.…”

contrasting

confidence: 65%

Effect of orthodontic treatment with premolar extractions on occlusal planes: A retrospective study

Zhu

Xiong

Yang

et al. 2022

Orthod Craniofacial Res

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Objective To figure out whether premolar extractions treatment would influence the cant of the occlusal planes and thus affect dentoskeletal patterns in patients with different types of malocclusions. Materials and Methods A total of 140 post‐orthodontic treatment subjects (96 females, 44 males) were included in this study, and their lateral cephalograms and demographic information were collected and analysed. The patients were divided into extraction and non‐extraction groups. The ANB, SNA, SNB, Wits, Facial Height Index (FHI), SN‐MP, SN‐AOP, SN‐POP and AOP‐POP angle were measured on the cephalograms. Other possible confounding factors were recorded. Data were analysed by univariate analysis, stratified analysis, multivariate analysis, and coefficient analysis. Results After treatment, the changes in the AOP‐SN, POP‐SN and AOP‐POP angle were statistically different between the extraction and non‐extraction groups. The results were consistent in different skeletal malocclusions and extent of crowding according to stratified analysis. After adjusting all confounding factors, the cant of the posterior occlusal plane was flattened further by 2.14 degrees in the extraction group than the non‐extraction group after orthodontic treatment, and the AOP‐SN and AOP‐POP angle would further increase by 1.72 and 3.81 degrees, respectively. Although no significant differences were found between the two groups, the SNA, ANB, and Wits in the extraction group decreased more with increased counterclockwise rotation of the mandible. Conclusion Compared to the non‐extraction group, there were more increases in the AOP‐SN and AOP‐POP angle and more posterior flattening in patients with four premolar extractions despite different types of dentoskeletal malocclusion, which were correlated to the change of variables in sagittal and vertical dimensions such as Wits and FHI.

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contrasting

confidence: 65%

Effect of orthodontic treatment with premolar extractions on occlusal planes: A retrospective study

Zhu

Xiong

Yang

et al. 2022

Orthod Craniofacial Res

View full text Add to dashboard Cite

show abstract

Corrective orthodontic treatment of high Frankfort mandibular plane angle with maxillary expansion and four premolar extractions with presence of external apical root resorption during treatment

Júnior

Azevedo

Gasparello

et al. 2023

AJO-DO Clinical Companion

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Vertical Skeletal Changes after Extraction and Nonextraction Orthodontic Treatment

et al. 2022

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Objectives Due to the constant battle regarding the controversial topic of orthodontic extraction, this study aims to assess the changes in vertical dimensions of patients treated with premolar extractions compared with nonextraction orthodontic patients. Materials and Methods A sample of 60 borderline patients were recruited and divided into extraction and nonextraction groups. Eleven pretreatment cephalometric measurements were recorded using WebCeph and patients were followed-up until the completion of treatment. Statistical Analysis Intragroup and intergroup comparisons were made using paired t-test and two-sample independent t-test, respectively. The joint significance of differences was measured using F-tests. Results The intragroup comparison revealed that in the extraction group, the vertical dimension was significantly increased posttreatment for four cephalometric measurements, that is, mandibular plane angle (p < 0.05), palatal plane angle (p < 0.05), Frankfort mandibular plane angle (p < 0.05), and y-axis (p < 0.05). In the comparison of the posttreatment values of both groups, the mean differences of the posttreatment values for sella nasion (SN)-gonion (Go)-gnathion (Gn) angle (p = 0.008), the total anterior (p = 0.050), and lower anterior facial heights (AFH; p = 0.011) were significantly higher. At the same time, the Jarabak ratio was significantly (p = 0.006) lower in the extraction group than in the nonextraction group. Conclusion The increase in vertical dimension is significantly higher in the extraction group than in the nonextraction group which indicates a significant impact of orthodontic extraction on the vertical dimensions.

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Vertical dimension of the face: Result of four premolar extractions or posterior teeth position

Cited by 3 publications

References 1 publication

Effect of orthodontic treatment with premolar extractions on occlusal planes: A retrospective study

Effect of orthodontic treatment with premolar extractions on occlusal planes: A retrospective study

Corrective orthodontic treatment of high Frankfort mandibular plane angle with maxillary expansion and four premolar extractions with presence of external apical root resorption during treatment

Vertical Skeletal Changes after Extraction and Nonextraction Orthodontic Treatment

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