Strength of Hollow-Screw Oral Implants
Author Information
Author(s): Cehreli Murat, Akkocaoglu Murat, Akca Kivanc
Primary Institution: Hacettepe University
Hypothesis
The study aims to determine the intraosseous torsional shear strength of an osseointegrated oral implant using finite element stress analysis.
Conclusion
The torsional strength of hollow-screw implants is primarily provided by the marginal bone, while the hollow part has a negligible effect on interfacial shear strength.
Supporting Evidence
- The in vivo torque failure test yielded 5952 μstrains and a torque failure of 750 N.cm.
- Finite element analysis revealed the highest shear stress value in the trabecular bone at 121 MPa.
- Trabecular bone in contact with the external surface of the hollow implant body participated in shear stress distribution.
Takeaway
This study looked at how strong a type of dental implant is when twisted. It found that the bone around the implant is what really holds it in place, not the hollow part of the implant.
Methodology
The study used a torque failure test on a hollow screw dental implant and finite element analysis to evaluate shear stress.
Limitations
The study was limited to a single patient and did not consider the effects of different implant designs or conditions.
Participant Demographics
A 62-year-old male patient with extensive breakdown of implant and teeth supported fixed prostheses.
Digital Object Identifier (DOI)
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