Spontaneous space closure after extraction of young first permanent molar. Retrospective cohort study.

IF 4.6 Q2 MATERIALS SCIENCE, BIOMATERIALS

ACS Applied Bio Materials Pub Date : 2024-10-23 eCollection Date: 2024-01-01 DOI:10.7717/peerj.18276

Heba Jafar Sabbagh, Ahmad Adnan Samara, Shoroog Hassan Agou, Jihan Turkistani, Manal Ibrahim Al Malik, Hadeel Abdulatief Alotaibi, Abrar Shimi Dhaifallah Alsolami, Nada Othman Bamashmous

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引用次数: 0

Abstract

Background: Early compromised first-permanent-molar (FPM) extraction can adversely affect occlusion. However, the current literature does not provide sufficient support for definitive early extraction outcome. This cohort study aimed to evaluate the pattern of post-FPM extraction spontaneous space closure and its pre-extraction indicators.

Methods: Patients of 7-13 years, with compromised FPM at three-tertiary-centers between 2015 and 2019 were retrospectively screened. Pre-extraction indicators were evaluated (extraction location, direction of the second permanent molar (SPM) long-axis, and SPM Demirjian development stage). Spontaneous space closure pattern was evaluated clinically and radiographically using the American Board of Orthodontics (ABO) grading system.

Results: In total, 112 FPMs (73-patients) were identified and five (4.5%) of the extraction sites showed favorable combined-ABO-scores. Distal direction of the SPM long-axis in the maxillary arch significantly decreased the relative risk (RR) of having a SPM rotation/alignment ABO score-1 (P = 0.002; RR = 0.64). For the mandibular arch, Demirjian stage D and E significantly decreased the RR of having ABO score-1 for spacing between the SPMs and second premolars (P = 0.029; RR:0.57, P = 0.004; RR:0.53, respectively) and vertical dimension (P = 0.02; RR = 0.53).

Conclusions: The direction of the SPM long-axis and its developmental stage are key indicators of the favorable outcome pattern of spontaneous space closure after FPM early extraction.

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年轻第一恒磨牙拔除后的自发间隙闭合。回顾性队列研究。

背景：第一永久性臼齿（FPM）拔牙过早会对咬合产生不利影响。然而，目前的文献并没有为明确的早期拔牙结果提供足够的支持。这项队列研究旨在评估 FPM 拔牙后自发间隙闭合的模式及其拔牙前的指标：回顾性筛选了 2015 年至 2019 年期间在三家三级医疗中心就诊的 7-13 岁 FPM 损害患者。评估拔牙前指标（拔牙位置、第二恒磨牙（SPM）长轴方向、SPM Demirjian发育阶段）。采用美国口腔正畸委员会（ABO）的分级系统对自发间隙关闭模式进行临床和影像学评估：共发现 112 个 FPM（73 名患者），其中 5 个（4.5%）拔牙部位显示出良好的 ABO 综合评分。上颌牙弓SPM长轴的远端方向显著降低了SPM旋转/对齐ABO评分-1的相对风险（RR）（P = 0.002; RR = 0.64）。在下颌牙弓中，Demirjian阶段D和E显著降低了SPM与第二前磨牙间距（P = 0.029; RR:0.57，P = 0.004; RR:0.53）和垂直尺寸（P = 0.02; RR = 0.53）的ABO评分-1的相对风险：结论：SPM长轴方向及其发育阶段是FPM早期拔牙后自发间隙闭合良好结果模式的关键指标。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

ACS Applied Bio Materials Chemistry-Chemistry (all)

CiteScore

9.40

自引率

2.10%

发文量

464