Related Experiment Video
Updated: May 6, 2026
07:11
Treatment of Facial Deformities using 3D Planning and Printing of Patient-Specific Implants
Published on: May 23, 2020
7.4K
Displacement and stress distribution pattern during complete mandibular arch distalization using buccal shelf bone
Parul Priya1, Abhay Kumar Jain2, Raghu Ranjan Prasad1
1Department of Orthodontics and Dentofacial Orthopedics, Hazaribag College of Dental Sciences and Hospital, Hazaribag, Jharkhand, India.
Journal of Orthodontic Science
|March 22, 2024
Summary
Utilizing buccal shelf screws for mandibular arch distalization, increasing lever arm height reduces stress and enhances bodily tooth movement. This improves predictability in orthodontic treatment outcomes.
Area of Science:
- Orthodontics
- Biomechanical Engineering
- Dental Mechanics
Background:
- Mandibular arch distalization is a common orthodontic procedure.
- Buccal shelf screws offer skeletal anchorage for efficient tooth movement.
Purpose of the Study:
- To evaluate and compare stress and displacement of teeth during mandibular arch distalization using buccal shelf screws.
- To determine the effect of lever arm height on biomechanical outcomes.
Main Methods:
- Three-dimensional finite element models of the mandibular arch were created with varying lever arm heights (0, 3, 6 mm).
- Buccal shelf screws were placed, and orthodontic forces were applied using a stainless-steel archwire and nickel-titanium closed coil springs.
- Tooth displacement and von Mises stress distribution were analyzed using ANSYS software.
Main Results:
- Maximum stress was observed at 0 mm lever arm height.
- Increasing lever arm height reduced stress in the buccal shelf screw and cortical bone.
- A 6 mm lever arm height promoted greater biomechanical bodily movement for molar distalization.
Conclusions:
- Lever arm height significantly influences stress distribution and tooth movement during distalization.
- Optimal lever arm height enhances predictable, bodily movement of the mandibular arch.
- This suggests a direct relationship between anchorage, force application, and overall arch displacement.
Related Concept Videos
01:04Applications of Stress
856
Consider a structure made of a boom and a rod designed to support a load. These two components are connected by a pin and stabilized by brackets and pins. The boom and the rod are detached from their supports to assess the different stresses imposed on this structure, and a free-body diagram is drawn. Then, all the forces applied, including the load acting on the structure, are identified. The reaction forces exerted on both the boom and the rod are computed using the equilibrium equations.
The...
The...
856
01:11Deformation of Member under Multiple Loadings
697
When a rod is made of different materials or has various cross-sections, it must be divided into parts that meet the necessary conditions for determining the deformation. These parts are each characterized by their internal force, cross-sectional area, length, and modulus of elasticity. These parameters are then used to compute the deformation of the entire rod.
In the case of a member with a variable cross-section, the strain is not constant but depends on the position. The deformation of an...
In the case of a member with a variable cross-section, the strain is not constant but depends on the position. The deformation of an...
697
01:18Residual Stresses in Bending
690
In the study of elastoplastic members subjected to bending moments, understanding the loading and unloading phases is crucial for assessing material behavior and structural integrity. During the loading phase, as the bending moment increases, the material initially responds elastically, adhering to Hooke's Law, where stress is directly proportional to strain. When the load exceeds the yield strength, plastic deformation occurs, resulting in permanent strain and deformation that remains even...
690
01:14Bending of Curved Members - Strain Analysis
678
The mechanics of deformation in curved members, such as beams or arches, under bending moments, involve complex responses. When such a member, symmetric about the y-axis and shaped like a segment of a circle centered at point C, is subjected to equal and opposite forces, its curvature and surface lengths change significantly. This alteration results in the shift of the curvature's center from C to C', indicating a tighter curve.
The important part of bending analysis for such a member...
The important part of bending analysis for such a member...
678
01:29Three-Dimensional Analysis of Strain
798
Three-dimensional strain analysis is crucial for understanding how materials deform under stress, particularly in elastic, homogeneous materials. This method employs principal stress axes to simplify complex stress states into more understandable forms. Subjected to stress, a small cubic element within a material either expands or contracts along these axes, transforming into a rectangular parallelepiped. This transformation effectively illustrates the material's deformation. The principal...
798
01:15Deformation of a Beam under Transverse Loading
972
Understanding beam deflection, particularly for indeterminate beams with overhanging segments and multiple concentrated loads, is crucial for ensuring structural integrity and functionality. The process begins with constructing an accurate free-body diagram, which helps identify the forces and moments acting on the beam. This diagram is vital for visualizing how bending moments vary along the beam's length, influencing its curvature.
The insights from the bending moment diagram extend to...
The insights from the bending moment diagram extend to...
972