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The main occluding area in patients with fixed partial dentures
Haruomi Abe1, Hiroyuki Miura, Daizo Okada
1Fixed Prosthodontics, Department of Restorative Sciences, Division of Oral Health Sciences, Graduate School, Tokyo Medical and Dental University.
Journal of Medical and Dental Sciences
|July 31, 2013
Summary
The main chewing area in patients with fixed partial dentures (FPDs) is positioned further back and is less stable compared to those with complete dentition. This finding is crucial for understanding potential excessive forces on FPD abutment teeth.
Area of Science:
- Dental occlusion and biomechanics
- Prosthodontics and restorative dentistry
Background:
- Food crushing occurs in the main occluding area between functional cusps.
- The quantitative position of this area in patients with fixed partial dentures (FPDs) remains under-investigated.
- Potential for excessive load on FPD abutment teeth due to main occluding area position exists.
Purpose of the Study:
- To quantitatively evaluate the position of the main occluding area in patients with FPDs.
- To compare the main occluding area position between FPD patients and controls with complete dentition.
Main Methods:
- Utilized temporary filling material to identify the main occluding area.
- Calculated centroid coordinates of the test material and projected them onto a reference axis.
- Recorded occlusal contact areas at the intercuspal position for correlation analysis.
Main Results:
- The main occluding area in the FPD group was significantly more posterior than in the control group.
- The main occluding area in the FPD group tended to be less stable.
- Differences may be influenced by occlusal contact area and periodontal ligament presence in the pontic region.
Conclusions:
- Fixed partial denture patients exhibit a posterior and less stable main occluding area compared to controls.
- Further research is needed to fully understand the implications of these findings on FPD biomechanics and longevity.
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