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评价正畸拔牙病例与非拔牙病例切牙转矩与侧貌美观的关系。

Evaluation of the relationship between incisor torque and profile aesthetics in patients having orthodontic extractions compared to non-extractions.

机构信息

Department of Biotechnological and Applied Clinical Sciences, University of L'Aquila, L'Aquila, Italy.

Department of Clinical and Experimental Medicine, University of Foggia, Foggia, Italy.

出版信息

Clin Oral Investig. 2023 Sep;27(9):5233-5248. doi: 10.1007/s00784-023-05143-7. Epub 2023 Jul 27.

DOI:10.1007/s00784-023-05143-7
PMID:37500932
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC10492872/
Abstract

OBJECTIVE

The aim of the present study was to evaluate the relationship between soft tissues aesthetics and incisor torque, as well as the effect of crowding, anchorage, and extraction pattern, in adult patients treated without extraction or with two or four extractions.

MATERIALS AND METHODS

Seventy-seven subjects with permanent dentition were selected retrospectively. Among these, 24 patients were treated with four extractions, 24 with two extractions and 29 without extractions. Lateral cephalograms and photographies taken before (T0) and after (T1) treatment were retrieved. The amount of crowding and the type of anchorage were recorded, and a cephalometric analysis was performed. A one-way ANOVA was used to compare the variables within and between groups. Linear regressions were performed to evaluate the effect of different predictors on soft tissues variables at T1.

RESULTS

The statistical analysis showed no differences within and between groups for soft tissue aesthetics. A significant reduction of the angle obtained from the intersection of Frankfurt plane and mandibular plane was observed in the four-extractions group, and a significant proclination of the lower incisors was observed in the two-extraction group. Linear regressions revealed that the change in soft tissue profile aesthetics was affected by the type of anchorage and the two-extractions pattern.

CONCLUSIONS

Similar soft tissue aesthetics were observed after treatment in the three groups, despite the presence of some skeletal and dental differences.

CLINICAL RELEVANCE

A well-controlled incisor torque helps to preserve soft tissues aesthetics. The type of anchorage could influence soft tissues.

摘要

目的

本研究旨在评估成人非拔牙或拔牙矫治患者中软组织美学与切牙转矩的关系，以及拥挤度、支抗和拔牙模式的影响。

材料和方法

回顾性选取 77 名恒牙患者，其中 24 名患者接受了 4 拔牙矫治，24 名患者接受了 2 拔牙矫治，29 名患者未拔牙矫治。获取治疗前（T0）和治疗后（T1）的侧位头颅侧位片和照片。记录拥挤量和支抗类型，并进行头影测量分析。采用单因素方差分析比较组内和组间变量。进行线性回归分析，以评估不同预测因子对 T1 软组织变量的影响。

结果

统计学分析显示，各组间软组织美学无差异。四拔牙组法兰克福平面与下颌平面交点角显著减小，二拔牙组下切牙显著前倾。线性回归显示，软组织轮廓美学的变化受支抗类型和双拔牙模式的影响。

结论

尽管存在一些骨骼和牙齿差异，但三组治疗后的软组织美学相似。良好控制的切牙转矩有助于保持软组织美学。支抗类型可能会影响软组织。

临床意义

良好控制的切牙转矩有助于保持软组织美学。支抗类型可能会影响软组织。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/286b/10492872/624a0c53fc3d/784_2023_5143_Fig8_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/286b/10492872/87abf918189b/784_2023_5143_Fig1_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/286b/10492872/3f82c7aaf7ea/784_2023_5143_Fig2_HTML.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/286b/10492872/88124e1ca28d/784_2023_5143_Fig4_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/286b/10492872/e35c8486889f/784_2023_5143_Fig5_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/286b/10492872/1a0c1d1a482a/784_2023_5143_Fig6_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/286b/10492872/9ab8356a4cdf/784_2023_5143_Fig7_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/286b/10492872/624a0c53fc3d/784_2023_5143_Fig8_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/286b/10492872/87abf918189b/784_2023_5143_Fig1_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/286b/10492872/3f82c7aaf7ea/784_2023_5143_Fig2_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/286b/10492872/69625b214e4d/784_2023_5143_Fig3_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/286b/10492872/88124e1ca28d/784_2023_5143_Fig4_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/286b/10492872/e35c8486889f/784_2023_5143_Fig5_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/286b/10492872/1a0c1d1a482a/784_2023_5143_Fig6_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/286b/10492872/9ab8356a4cdf/784_2023_5143_Fig7_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/286b/10492872/624a0c53fc3d/784_2023_5143_Fig8_HTML.jpg

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