Related Experiment Video
Updated: May 10, 2026

In situ Compressive Loading and Correlative Noninvasive Imaging of the Bone-periodontal Ligament-tooth Fibrous Joint
Published on: March 7, 2014
Quantitative evaluation and comparison of stress transmission characteristics of bar-clip and short coping
Alok Dwivedi1, Rajesh Vyas, Anurag Gupta
1Department of Prosthodontics, College of Dentistry, King Khalid University, Abha, Saudi Arabia. at1970c@yahoo.co.in
Statement Of Problem:
When two canine abutment teeth are used to support an overdenture prosthesis, optimal stress distribution to minimize forces to abutments is desired.
Purpose:
This study used photoelastic stress analysis to compare the stress patterns generated around canine abutments using two different overdenture retainer designs.
Materials And Methods:
Two canine abutments were anchored in the photoelastic mandible and overdentures were fabricated using two different overdenture attachments. The fitting surface of dentures were lined with resilient layer of light bodied silicon rubberbase impression material to simulate oral mucosa. The attachments used were Bar-Clip and Short coping type. Verticalload of 5 to 50 lb was applied by jaw simulator. Resultant stress fringes were photographed and evaluated quantitatively.
Results:
Bar-Clip type of attachment transmitted more amount of stress than short coping type transmitted. There was gross difference in magnitude of stresses between two types of retainers.
Conclusion:
As the retentivity of the attachment increased there was more stress concentration around the abutments.
Related Concept Videos
Applications of Stress
The...
Stress: General Loading Conditions
The shearing force, possessing potential directionality within the plane of the section, is simplified into two component forces running parallel to the x and y axes.
Stresses under Combined Loadings
The process begins by slicing the tube at critical points and analyzing the internal forces and stress components at these sections, focusing on the centroid. Normal stresses, generated by axial forces and bending moments, are either compressive or tensile and vary across the section from...
Stress Concentrations
Stress Concentrations
The stress concentration...
Stress-Strain Diagram - Ductile Materials
