J Periodontal Implant Sci.  2017 Aug;47(4):231-239. 10.5051/jpis.2017.47.4.231.

Marginal bone level changes in association with different vertical implant positions: a 3-year retrospective study

Affiliations
  • 1Department of Periodontology, Wonkwang University Daejeon Dental Hospital, Wonkwang University College of Dentistry, Daejeon, Korea. seongnyum@wonkwang.ac.kr

Abstract

PURPOSE
To retrospectively evaluate the relationship between the vertical position of the implant-abutment interface and marginal bone loss over 3 years using radiological analysis.
METHODS
In total, 286 implant surfaces of 143 implants from 61 patients were analyzed. Panoramic radiographic images were taken immediately after implant installation and at 6, 12, and 36 months after loading. The implants were classified into 3 groups based on the vertical position of the implant-abutment interface: group A (above bone level), group B (at bone level), and group C (below bone level). The radiographs were analyzed by a single examiner.
RESULTS
Changes in marginal bone levels of 0.99±1.45, 1.13±0.91, and 1.76±0.78 mm were observed at 36 months after loading in groups A, B, and C, respectively, and bone loss was significantly greater in group C than in groups A and B.
CONCLUSIONS
The vertical position of the implant-abutment interface may affect marginal bone level change. Marginal bone loss was significantly greater in cases where the implant-abutment interface was positioned below the marginal bone. Further long-term study is required to validate our results.

Keyword

Alveolar bone loss; Bone-implant interface; Dental implants
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