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Conometric Single Restorations with Prosthetic Margin Below the Bone Crest: A Case Series.
Summary
This study shows that subcrestal placement of single dental implants with conometric retention is stable long-term. The conometric connection allows prosthetic margins below the bone crest with minimal bone loss.
Area of Science:
- Dentistry
- Oral Implantology
- Prosthodontics
Background:
- Single implant-prosthetic rehabilitation is a common dental procedure.
- Subcrestal implant placement and conometric retention offer potential advantages.
- Evaluating long-term stability and bone levels is crucial for implant success.
Purpose of the Study:
- To assess the radiographic and clinical outcomes of single implant-prosthetic rehabilitation using conometric retention.
- To evaluate the stability of subcrestal implants and prosthetic crowns over two years.
- To determine the feasibility of positioning prosthetic connection margins below the bone crest.
Main Methods:
- Prospective case series involving 10 sites with single edentulism.
- Rehabilitation with subcrestal implants and conometric-retained prosthetic crowns.
- Radiographic evaluation of crestal bone levels and clinical assessment of peri-implant soft tissues over 2 years.
Main Results:
- All implant rehabilitations demonstrated clinical and radiographic stability after 2 years.
- Mean vertical bone loss was minimal (0.1 mm) after 2 years of functional load.
- Mean horizontal bone loss was observed at the abutment-cap interface (0.59 mm distal, 0.21 mm mesial).
Conclusions:
- Conometric connection at both implant-abutment and abutment-crown interfaces facilitates subcrestal margin placement.
- This technique appears to allow prosthetic margins to be positioned below the bone crest with favorable outcomes.
- The findings suggest a stable and predictable treatment option for single edentulism.
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