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BMC Oral Health
Published in: BMC Oral Health 1/2023

Open Access 01-12-2023 | Tooth Extraction | Research

Slim the face or not: 3D change of facial soft and hard tissues after third molars extraction: a pilot study

Authors: Xin-Wen Wang, Hui-Fang Yang, En-Bo Wang, Xin-Yu Cui, Yi-Jiao Zhao, Jiu-Hui Jiang

Published in: BMC Oral Health | Issue 1/2023

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Abstract

Background

Whether slim the face or not after removed third molars is the concern of some orthodontic treatment candidates. The aim of this article is to explore the volume changes of facial soft and hard tissues after third molars extraction, as well as develop a reproducible clinical protocol to precisely assess facial soft tissue volume change.

Methods

A non-randomized, non-blind, self-controlled pilot study was conducted. 24 adults aged 18–30 had ipsilateral third molars extracted. The body weight change was controlled within 2 kg. Structured light scans were taken under a standardized procedure pre-extraction (T0), three (T1), and six (T2) months post-extraction; CBCTs were taken at T0 and T2. The projection method was proposed to measure the soft tissue volume (STV) and the soft tissue volume change (STVC) by the Geomagic software. The hard tissue volume change (HTVC) was measured in the Dragonfly software.

Results

The final sample size is 23, including 5 males (age 26.6 ± 2.5 years) and 18 females (age 27.3 ± 2.5 years). The HTVC was − 2.33 ± 0.46ml on the extraction side. On the extraction side, the STV decreased by 1.396 (95% CI: 0.323–2.470) ml (P < 0.05) at T1, and increased by 1.753 (95% CI: -0.01-3.507) ml (P = 0.05) at T2. T2 and T0 had no difference (P > 0.05). The inter and intra-raters ICC of the projection method was 0.959 and 0.974. There was no correlation between the STVC and HTVC (P > 0.05).

Conclusions

After ipsilateral wisdom teeth extraction, the volume of hard tissue on the extraction side reduces, and the volume of facial soft tissue does not change evidently. However, further research with large sample size is still needed. The STV measurement has excellent repeatability. It can be extended to other interested areas, including forehead, nose, paranasal, upper lip, lower lip and chin, which is meaningful in the field of orthodontics and orthopedics.

Trial registration

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Metadata
Title
Slim the face or not: 3D change of facial soft and hard tissues after third molars extraction: a pilot study
Authors
Xin-Wen Wang
Hui-Fang Yang
En-Bo Wang
Xin-Yu Cui
Yi-Jiao Zhao
Jiu-Hui Jiang
Publication date
01-12-2023
Publisher
BioMed Central
Published in
BMC Oral Health / Issue 1/2023
Electronic ISSN: 1472-6831
DOI
https://doi.org/10.1186/s12903-023-03214-5

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