Related Experiment Videos
Anchorage effect of various shape palatal osseointegrated implants: a finite element study
Fengshan Chen1, Kazuto Terada, Kooji Handa
1Division of Orthodontics, Graduate School of Medical and Dental Sciences, Niigata University, 2-5274 Gakko Machi-Dori, Niigata 9518126, Japan. chenfengshan@hotmail.com
The Angle Orthodontist
|May 19, 2005
Summary
Palatal implants significantly reduce stress in the periodontal ligament (PDL) during orthodontic treatment. While implants enhance anchorage, adding a step to the implant is more beneficial than a screw design for reducing stress.
Area of Science:
- Orthodontics
- Biomaterials Engineering
- Finite Element Analysis
Background:
- Anchorage control is crucial in orthodontics.
- Palatal osseointegrated implants offer a stable anchorage solution.
- Understanding stress distribution with different implant designs is essential.
Purpose of the Study:
- To compare the anchorage effects of different palatal osseointegrated implant designs.
- To evaluate stress distribution in the periodontal ligament (PDL), implant, and surrounding bone.
- To assess the influence of implant design modifications (step, screw) on anchorage.
Main Methods:
- Finite element analysis (FEA) was employed.
- Three-dimensional models included maxillary second premolars, PDL, alveolar bone, palatal bone, implants, and a transpalatal arch.
- Simulated orthodontic forces were applied to the premolars.
Main Results:
- Palatal implants significantly reduced von Mises stress in the PDL by 24.3-27.7%.
- PDL stress levels were similar across simple, step, and screw implant models.
- Stress in the implant-surrounding bone was minimal.
Conclusions:
- Palatal osseointegrated implants are effective for enhancing orthodontic anchorage.
- Incorporating a step design into the implant may reduce stress on the implant and surrounding bone.
- A screw design offers minimal additional anchorage benefit over a simple cylinder implant.