| Autor: |
Marc Quirynen, Wim Coucke, Nele Van Assche, Bruno Collaert |
| Rok vydání: |
2007 |
| Předmět: |
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| Zdroj: |
Journal of Clinical Periodontology. 35:76-79 |
| ISSN: |
0303-6979 |
| DOI: |
10.1111/j.1600-051x.2007.01158.x |
| Popis: |
Aim: This retrospective study aimed to determine the consequence of early cover screw exposure on peri-implant marginal bone level. Material and Methods: Sixty Astra Tech® MicroThread implants installed in partially edentulous jaws were compared: 20 implants were placed following a two-stage procedure and were unintentionally exposed to the oral cavity (two-stage exposed), 20 implants were placed following a two-stage procedure and were surgically exposed after a subgingival healing time of 3–6 months (two-stage submerged), and 20 implants were placed following a one-stage surgical protocol (one-stage). Digital radiographs were taken at implant placement for all implants, and after abutment surgery for the two-stage exposed and two-stage submerged groups or after 3 months for the one-stage group. Bone loss mesially and distally was measured with an on-screen cursor after calibration. Results: Mean bone re-modelling was 1.96 mm (range: 0.2–3.2 mm) around the two-stage exposed implants, 0.01 mm (range: 0.0–0.3 mm) around the two-stage submerged implants and 0.14 mm (range: 0.0–1.2 mm) around the one-stage implants. Conclusion: The unintentional perforation of two-stage implants resulted in significant bone destruction, probably because the biological width was not considered. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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