Effect of orthodontic space closure on dental pulp sensitivity. Prospective clinical trial

IF 2.4 3区医学 Q2 DENTISTRY, ORAL SURGERY & MEDICINE

Orthodontics & Craniofacial Research Pub Date : 2024-04-18 DOI:10.1111/ocr.12792

Aljaž Golež, Maja Ovsenik, Ksenija Cankar

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引用次数: 0

Abstract

Background

Orthodontic tooth movement (OTM) is a biological process that can influence the function of the pulp, including its innervation. The excitability of the nerve fibres of the pulp may be altered by forces exerted on the nerve fibres or by reduced blood flow to the pulp. The aim of this clinical study was to evaluate the sensitivity of the dental pulp during levelling and during the phase of space closure, to assess the role of certain controlled risk factors.

Methods

Twenty-two adolescent participants requiring orthodontic space closure in transcanine sector were enrolled in a prospective clinical study. Patients were observed before OTM, after levelling and 1 month during active space closure. The sensitivity threshold of the pulp was measured using the electric pulp test (EPT). Dental models were obtained using an intraoral scanner, allowing measurement of interdental distances and calculation of OTM speed. The teeth were categorized according to position and tooth type.

Results

The EPT values increased significantly during orthodontic treatment (one-way RM-ANOVA, P = .014). There was a significant difference in EPT values between the tooth categories. Teeth with a single root adjacent to the residual space had the highest EPT thresholds (two-way RM-ANOVA, P < .001; Holm-Sidak, P < .05).

Conclusions

OTM reduced pulpal sensitivity. Pulpal sensitivity during active space closure was similar to sensitivity during the levelling phase. The pulpal sensitivity of molars was less affected by OTM than that of single-rooted teeth, while teeth closer to the gap had a significantly higher pulpal sensitivity threshold during active OTM.

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正畸间隙封闭对牙髓敏感性的影响。前瞻性临床试验

背景正畸牙齿移动（OTM）是一个生物过程，可影响牙髓的功能，包括其神经支配。牙髓神经纤维的兴奋性可能会因施加在神经纤维上的力或流向牙髓的血流减少而改变。这项临床研究的目的是评估牙髓在矫治期间和间隙关闭阶段的敏感性，并评估某些可控风险因素的作用。对患者进行了 OTM 前、矫治后和 1 个月的主动间隙关闭观察。牙髓的敏感阈值是用电髓试验（EPT）测量的。使用口内扫描仪获取牙齿模型，测量牙间距离并计算 OTM 速度。结果在正畸治疗期间，EPT 值显著增加（单向 RM-ANOVA，P = .014）。不同类型牙齿的 EPT 值差异明显。与残余间隙相邻的单根牙齿的 EPT 阈值最高（双向 RM-ANOVA，P < .001；Holm-Sidak，P < .05）。主动间隙关闭时的牙髓敏感性与平整阶段的敏感性相似。与单根牙相比，磨牙的牙髓敏感性受 OTM 的影响较小，而距离间隙较近的牙齿在主动 OTM 期间的牙髓敏感性阈值明显较高。

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来源期刊

Orthodontics & Craniofacial Research 医学-牙科与口腔外科

CiteScore

5.30

自引率

3.20%

发文量

审稿时长

>12 weeks

期刊介绍： Orthodontics & Craniofacial Research - Genes, Growth and Development is published to serve its readers as an international forum for the presentation and critical discussion of issues pertinent to the advancement of the specialty of orthodontics and the evidence-based knowledge of craniofacial growth and development. This forum is based on scientifically supported information, but also includes minority and conflicting opinions. The objective of the journal is to facilitate effective communication between the research community and practicing clinicians. Original papers of high scientific quality that report the findings of clinical trials, clinical epidemiology, and novel therapeutic or diagnostic approaches are appropriate submissions. Similarly, we welcome papers in genetics, developmental biology, syndromology, surgery, speech and hearing, and other biomedical disciplines related to clinical orthodontics and normal and abnormal craniofacial growth and development. In addition to original and basic research, the journal publishes concise reviews, case reports of substantial value, invited essays, letters, and announcements. The journal is published quarterly. The review of submitted papers will be coordinated by the editor and members of the editorial board. It is policy to review manuscripts within 3 to 4 weeks of receipt and to publish within 3 to 6 months of acceptance.