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

BMC Oral Health

Research

En-Bo Wang¹  Jiu-Hui Jiang²  Xin-Yu Cui²  Hui-Fang Yang³  Yi-Jiao Zhao³  Xin-Wen Wang⁴ 

[1] Department of Oral and Maxillofacial Surgery, Peking University School and Hospital of Stomatology, Beijing, CN, China;Department of Orthodontics, Peking University School and Hospital of Stomatology, #22 Zhongguancun South Avenue, Haidian District, 100081, Beijing, CN, China;National Engineering Research Center of Oral Biomaterials and Digital Medical Devices, Beijing, CN, China;Third Clinical Division, Peking University School and Hospital of Stomatology & National Center of Stomatology & National Clinical Research Center for Oral Diseases & National Engineering Research Center of Oral Biomaterials and Digital Medical Devices, Beijing, CN, China;

关键词: Molar, third;    Tooth extraction;    Cone-Beam Computed Tomography;    Imaging, Three-Dimensional;    Face;    Reproducibility of results;   

DOI  :  10.1186/s12903-023-03214-5

 received in 2023-02-23, accepted in 2023-07-07,  发布年份 2023

来源: Springer

【 摘 要 】

BackgroundWhether 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.MethodsA 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.ResultsThe 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).ConclusionsAfter 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 registrationChiCTR, ChiCTR1800018305 (11/09/2018), http://www.chictr.org.cn/showproj.aspx?proj=28868.

【 授权许可】

CC BY   
© The Author(s) 2023

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