Related Experiment Video
Updated: Dec 14, 2025

A Coupled Experiment-finite Element Modeling Methodology for Assessing High Strain Rate Mechanical Response of Soft Biomaterials
Published on: May 18, 2015
Stress distribution with extra-short implants in an angled frictional system: A finite element analysis study
Edelcio de Souza Rendohl1, William Cunha Brandt2
1PhD student, Department of Implantology, University of Santo Amaro, UNISA, Sao Paulo, Brazil.
Statement Of Problem:
Short and extra-short implants with Morse taper connections were developed to avoid grafting procedures. How the stresses around these implants differ with abutments of different angulations is unclear.
Purpose:
The purpose of this finite element study was to analyze the stress distribution in different structures (abutment, implant, and bone) of an extra-short implant with a Morse taper connection to the abutment (Arcsys-FGM-Brazil) (5.0×5.0 mm and 4.3×5.0 mm) when different abutment degrees were used.
Material And Methods:
Eight 3D models were designed according to each group under analysis: group 5DS (5.0×5.0-mm implants with straight abutment), group 5DA (5.0×5.0-mm implants with 20-degree angled abutments), group 4DS (4.3×5.0-mm implants with straight abutments), and group 4DA (4.3×5.0-mm implants with 20-degree angled abutments). Axial and oblique loads of 150 N were applied on the mandibular molar crowns.
Results:
The oblique loads and angled abutments had higher stress values in the whole model (implant, abutment, and bone) than the axial loads and straight abutments. Implants with a different diameter had almost the same stress distribution on the implant, abutment, and bone. The yield limit was exceeded in the cortical bone with oblique loads and was also exceeded in implant models when an angled abutment with oblique loads was used.
Conclusions:
Extra-short implants with Morse taper connections to the abutment had higher stress concentrations with an angled abutment on oblique loads, and the peri-implant bone was the most damaged structure.
Related Concept Videos
Stress Concentrations in Circular Shafts
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....
Bearing Stress
Due to the intricacy of these microforces, an average value, known as bearing stress, is often used by...
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...
Components of Stress
Interestingly, the hidden cube faces also experience these stresses, equal and...

