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Ridge dimensional changes following single-tooth extraction in the aesthetic zone
1Periodontics, Melbourne Dental School, University of Melbourne, Parkville, Vic., Australia.
Clinical Oral Implants Research
|January 26, 2013
Summary
Tooth extraction in the aesthetic zone causes significant ridge reduction and buccal bone resorption within 6-8 weeks. This dimensional change often necessitates bone augmentation for successful dental implant placement.
Area of Science:
- Dental Implantology
- Oral Surgery
- Periodontology
Background:
- Alveolar ridge dimensional changes after tooth extraction are a concern for dental implant success.
- The aesthetic zone presents unique challenges due to functional and esthetic demands.
Purpose of the Study:
- To quantify dimensional changes in the alveolar ridge after single tooth extraction in the aesthetic zone over a 6-8 week healing period.
- To analyze the resorption pattern and extent of the buccal bone plate during this timeframe.
Main Methods:
- Twenty subjects undergoing single tooth extraction in the aesthetic zone were selected.
- Hard and soft tissue measurements were taken pre-extraction and 6-8 weeks post-extraction.
Main Results:
- A 15% reduction in crestal ridge thickness was observed.
- Buccal bone plate resorption occurred in an 'inverted V shape'.
- 42% of subjects experienced 4 mm or more of buccal bone loss.
Conclusions:
- Significant hard and soft tissue reduction occurs post-extraction in the aesthetic zone.
- Coronal mid-buccal aspect showed the most notable reduction.
- Simultaneous augmentation was required for all implant placements.
