使用快速上颌扩弓器和上颌骨骨骼扩弓器对上颌骨复合体上颌扩弓时应力分布和位移模式的比较：有限元模型分析

Comparison of stress distribution and displacement pattern of maxillary expansion in craniomaxillary complex using rapid maxillary expander and maxillary skeletal expander: A finite element model analysis.

作者信息

Goswami Monalisa, Sahu Anshu, Prasad Raghu Ranjan, Priya Parul, Priya Parul, Roy Shovan, A Abhijith

机构信息

Department of Orthodontics and Dentofacial Orthopaedics, Hazaribag College of Dental Sciences and Hospital, Demotand, Hazaribagh, Jharkhand, 825301, India.

出版信息

Int Orthod. 2025 Sep;23(3):100997. doi: 10.1016/j.ortho.2025.100997. Epub 2025 Mar 26.

DOI:10.1016/j.ortho.2025.100997

PMID:40147292

Abstract

INTRODUCTION

A combination of miniscrews and the maxillary skeletal expander (MSE) was created to address potential issues with the traditional rapid maxillary expander (RME). This study was conducted to assess and compare stress distribution and displacement patterns in the craniomaxillary complex during maxillary expansion using Rapid Maxillary Expander (RME) and Maxillary Skeletal Expander (MSE) using 3D Finite Element model.

METHODS

A 3D Finite Element model of the craniomaxillary complex, including the maxilla and maxillary dentition, was generated using computer aided design software. Stress distribution and displacement patterns were analysed for both RME and MSE treatments.

RESULTS

The results showed that MSE had greater bone displacement, bone stress, teeth displacement, teeth stress, and periodontal displacement and stress compared to RME. In terms of suture displacement, MSE had higher frontonasal suture displacement compared to RME. Teeth displacement showed that central and lateral incisors showed palatal displacement with RME and buccal displacement with MSE, while canine, premolars, and molars all showed greater buccal displacement with MSE compared to RME along the transverse axis. Central incisor displacement was observed in the extrusion direction with RME, while it was in the intrusion direction with MSE. In terms of teeth stress, MSE treatment resulted in higher stress on the central incisor, lateral incisor, canine, premolars, and molars compared to RME treatment.

DISCUSSION

Overall, MSE exhibited greater bone displacement, stress, and suture displacement/stress compared to RME. Additionally, MSE induced different tooth displacement patterns with higher stress on teeth compared to RME. These findings suggest differences in treatment outcomes and biomechanical effects between the two expansion methods.

摘要

引言

微型螺钉与上颌骨骨骼扩弓器（MSE）相结合，旨在解决传统快速上颌扩弓器（RME）的潜在问题。本研究旨在使用三维有限元模型评估和比较使用快速上颌扩弓器（RME）和上颌骨骨骼扩弓器（MSE）进行上颌扩弓时颅上颌复合体中的应力分布和位移模式。

方法

使用计算机辅助设计软件生成包括上颌骨和上颌牙列的颅上颌复合体的三维有限元模型。分析了RME和MSE治疗的应力分布和位移模式。

结果

结果表明，与RME相比，MSE的骨位移、骨应力、牙齿位移、牙齿应力以及牙周位移和应力更大。在缝位移方面，与RME相比，MSE的额鼻缝位移更高。牙齿位移显示，RME时中切牙和侧切牙出现腭向位移，MSE时出现颊向位移，而尖牙、前磨牙和磨牙在横轴上MSE时的颊向位移均比RME时更大。RME时中切牙在垂直向上出现伸长位移，而MSE时则出现压低位移。在牙齿应力方面，与RME治疗相比，MSE治疗导致中切牙、侧切牙、尖牙、前磨牙和磨牙上的应力更高。