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[Jawbone reduction in immediate prostheses. A comparison between overdentures and complete dentures]
M A van Waas1, W Kalk, R E Jonkman
1Vakgroep Orale Functieleer en de Faculteit der Medische Wetenschappen van de Katholieke Universiteit Nijmegen.
Nederlands Tijdschrift Voor Tandheelkunde
|October 1, 1993
Summary
Immediate overdentures, utilizing retained canine roots, significantly reduce mandibular bone loss compared to complete dentures in the first two years post-treatment. This finding is crucial for long-term denture stability.
Area of Science:
- Dentistry
- Oral Surgery
- Prosthodontics
Background:
- Immediate dentures are a common treatment for tooth loss.
- Mandibular bone reduction is a significant concern following immediate denture placement.
- The long-term effects of different immediate denture types on bone preservation are not fully understood.
Purpose of the Study:
- To compare mandibular bone reduction in patients receiving immediate overdentures versus immediate complete dentures.
- To evaluate the effect of retained canine roots on alveolar process collapse.
Main Methods:
- A randomized controlled clinical trial involving 74 patients requiring immediate dentures.
- Treatment groups: immediate overdentures on lower canines vs. immediate complete dentures.
- Mandibular bone reduction measured via oblique lateral cephalometric radiographs at baseline, 1 year, and 2 years.
Main Results:
- Immediate overdenture group showed significantly less bone reduction (0.75 mm canine, 0.77 mm posterior) than the complete denture group (1.90 mm canine, 1.77 mm posterior) in the first year.
- Statistically significant differences in bone reduction were observed in all measured regions in the first year.
- Significant differences persisted in most regions by the two-year mark, excluding the molar region.
Conclusions:
- Retaining canine roots under immediate mandibular dentures effectively reduces alveolar bone loss.
- Immediate overdentures offer superior bone preservation compared to immediate complete dentures.
- This root retention strategy is beneficial for maintaining mandibular bone structure in immediate denture patients.