A new orthodontic force simulation system with a simulated periodontal ligament to measure the delivered force at the root apex.

IF 1.4 Q3 DENTISTRY, ORAL SURGERY & MEDICINE

Journal of Orthodontics Pub Date : 2023-12-01 Epub Date: 2023-06-05 DOI:10.1177/14653125231176844

Keisuke Tochigi, Kazuhito Arai

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引用次数: 0

Abstract

Objective: To develop a new orthodontic force simulation system with a simulated periodontal ligament (PDL) that enables measurement of the delivered force at the root apex and to clarify the relationship between the applied orthodontic force and the delivered force at the root apex.

Design: In vitro study.

Setting: Orthodontics department of a university, Tokyo, Japan.

Methods: A new orthodontic force simulation system that enables measurement of the force at the root apex of the maxillary central incisor, was developed. Lingual and intrusion movements were simulated with applied orthodontic force at three levels: 50, 100 and 200 gf. The delivered forces at the root apex were compared between the two movements. Furthermore, the ratio of delivered force at the root apex to the applied orthodontic force (the apex force ratio) was calculated.

Results: The magnitudes of delivered forces at the root apex were significantly greater in intrusion movement than in lingual movement (P < 0.01). The apex force ratios were in the range of 47.3%-56.2% for lingual movement and 85.6%-86.2% for intrusion movement.

Conclusion: The present study, of a newly developed orthodontic force simulation system, showed that the characteristics of the delivered force at the root apex differed according to the direction of tooth movement.

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采用模拟牙周膜的正畸力模拟系统，测量牙根尖处的力。

目的:研制一种新型的模拟牙周韧带(PDL)正畸力模拟系统，用于测量根尖处的施加力，阐明正畸力与根尖处施加力之间的关系。设计:体外研究。地点:日本东京某大学正畸系。方法:开发了一种新的正畸力模拟系统，可以测量上颌中切牙根尖处的力。在50,100和200gf三个水平的正畸力下模拟舌部和侵入部的运动。比较两种运动对根尖处的作用力。计算根尖处所施加的力与所施加的正畸力之比(牙尖力比)。结果:牙根尖上的力在牙根尖上的传递量在牙根尖上的传递量明显大于牙根尖上的传递量(P < 0.01)。舌尖运动的尖力比为47.3% ~ 56.2%，侵入运动的尖力比为85.6% ~ 86.2%。结论:新研制的正畸力模拟系统显示牙体移动方向不同，牙根尖处的力输出特性不同。

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

Journal of Orthodontics DENTISTRY, ORAL SURGERY & MEDICINE-

CiteScore

2.60

自引率

15.40%

发文量

期刊介绍： The Journal of Orthodontics has an international circulation, publishing papers from throughout the world. The official journal of the British Orthodontic Society, it aims to publish high quality, evidence-based, clinically orientated or clinically relevant original research papers that will underpin evidence based orthodontic care. It particularly welcomes reports on prospective research into different treatment methods and techniques but also systematic reviews, meta-analyses and studies which will stimulate interest in new developments. Regular features include original papers on clinically relevant topics, clinical case reports, reviews of the orthodontic literature, editorials, book reviews, correspondence and other features of interest to the orthodontic community. The Journal is published in full colour throughout.