Effects of Skeletally Supported Anterior en Masse Retraction with Varied Lever Arm Lengths and Locations in Lingual Orthodontic Treatment: A 3D Finite Element Study

Autor: Mohammad Ghannam, Beste Kamiloğlu
Rok vydání: 2021
Předmět:
Male
Cuspid
business.product_category
Article Subject
Tooth Movement Techniques
Orthodontic Brackets
Periodontal Ligament
medicine.medical_treatment
Bone Screws
Finite Element Analysis
General Biochemistry
Genetics and Molecular Biology
Crown (dentistry)
Finite element study
03 medical and health sciences
Imaging
Three-Dimensional
0302 clinical medicine
stomatognathic system
Maxilla
Orthodontic Anchorage Procedures
Orthodontic Wires
medicine
Humans
Orthodontic Appliance Design
Torque
Computer Simulation
Maxillary central incisor
030212 general & internal medicine
Mechanical Phenomena
Lateral incisor
Tooth Crown
Orthodontics
Lever
General Immunology and Microbiology
digestive
oral
and skin physiology
030206 dentistry
General Medicine
Molar
Biomechanical Phenomena
Line of action
Incisor
stomatognathic diseases
Medicine
Stress
Mechanical
business
Geology
Control methods
Research Article
Zdroj: BioMed Research International
BioMed Research International, Vol 2021 (2021)
ISSN: 2314-6141
2314-6133
DOI: 10.1155/2021/9975428
Popis: Objective. This study is aimed at analyzing different points of force application during miniscrew supported en masse retraction of the anterior maxillary teeth to identify the best line of action of force in lingual orthodontic treatment. Materials and Methods. Three-dimensional (3D) finite element models were created to stimulate en masse retraction with different heights and positions of the miniscrew and lever arm to change the force application points; a 150 g retraction force was applied from the miniscrew to the lever arms, and the initial tooth displacements were analyzed. Results. Lingual crown tipping and occlusal crown extrusion were seen at all heights and positions of the miniscrew and lever arm, but when the miniscrew height was at 8 mm and the power arm was located between the lateral incisors and canines, these tipping patterns were less than those obtained with a 4.5 mm high miniscrew and a lever arm located distal to the canines. Conclusion. All miniscrew heights and lever arm positions showed initial lingual crown tipping and labial root tipping with occlusal crown extrusion. However, the 8 mm miniscrew height and the lever arm located between the lateral incisor and canine showed fewer amounts of these tipping patterns than a 4.5 mm miniscrew height and lever arm located distal to the canines. Therefore, this could be the preferred point of force application during en masse retraction in lingual treatment with additional torque control methods.
Databáze: OpenAIRE
Externí odkaz:
Nepřihlášeným uživatelům se plný text nezobrazuje