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Longitudinal study of soft-tissue profile changes in patients receiving immediate complete dentures
A Tallgren1, B R Lang, R L Miller
1University of Michigan School of Dentistry, Ann Arbor.
The International Journal of Prosthodontics
|January 1, 1991
Summary
Complete denture wearers experience significant facial changes due to residual ridge reduction. Mandibular rotation and bone resorption alter chin and lip profiles over two years.
Area of Science:
- Dentistry
- Orthodontics
- Gerontology
Background:
- Complete denture use can lead to progressive changes in the jawbone structure.
- Residual ridge reduction is a common consequence of wearing complete dentures.
- These anatomical changes can affect the facial profile and aesthetics of denture wearers.
Purpose of the Study:
- To investigate the skeletal and soft-tissue profile alterations in complete denture wearers.
- To quantify changes resulting from residual ridge reduction over a two-year period.
- To correlate bone resorption with specific facial profile modifications.
Main Methods:
- Longitudinal study design involving 21 complete denture wearers.
- Profile cephalometric radiography was used to capture skeletal and soft-tissue data.
- 58 digitized reference points were analyzed at multiple observation stages over two years.
Main Results:
- Significant anterosuperior rotation of the mandible observed within the first six months.
- Ridge resorption correlated with changes in the soft-tissue chin and mandibular lip.
- At two years, further ridge reduction led to mandibular repositioning, causing chin and lip protrusion and maxillary lip eversion.
Conclusions:
- Residual ridge reduction significantly impacts the facial profile of complete denture wearers.
- Mandibular rotation and bone resorption are key drivers of these aesthetic changes.
- The findings highlight the need for strategies to manage denture-induced anatomical modifications.