Effects on canine intrusion treatment with different Invisalign parameters
10.16156/j.1004-7220.2017.01.010
- VernacularTitle:无托槽隐形矫治器各参数对尖牙压低移动治疗的影响
- Author:
Yong-Qing CAI
1
;
Xiao-Xiang YANG
;
Bing-Wei HE
Author Information
1. 福州大学 石油化工学院
- Keywords:
Invisalign;
Canine movement;
Intrusion displacement;
Elastic modulus;
Compressive stress
- From:
Journal of Medical Biomechanics
2017;32(1):60-65
- CountryChina
- Language:Chinese
-
Abstract:
Objective To study the effects of different parameters (thickness,orthodontic displacement,elastic modulus) from Invisalign on canine displacement and periodontal ligament (PDL) stress during mandibular canine intrusion treatment.Methods Forty-eight different Invisalign models were used to simulate canine intrusion treatment by using the finite element method.Results The initial displacement of the canine and stress on canine PDL were proportional to the thickness,intrusion displacement,and elastic modulus of the Invisalign,and the intrusion displacement had the greatest influence on canine displacement.During canine intrusion treatment,the compressive stress on PDL was the most sensitive and changed easily with the change of parameters.Conclusions The canine displacement may increase with the thickness,intrusion displacement and elastic modulus of Invisalign increasing,however,the stress on PDL will also increase,showing the largest increasing magnitude in compressive stress on PDL meanwhile.Therefore,to accelerate tooth movement in Invisalign treatment,it is suggested to use the assisted devices or some other measures such as attachment,supplement of bracket-wires treatment,or implant anchorage.
