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Soft and Hard Tissue Changes around Tissue‐Oriented T ulip‐Design Implant Abutments: A 1‐Year Randomized Prospective Clinical Trial
Author(s) -
Gutmacher Zvi,
Levi Guy,
Blumenfeld Israel,
Machtei Eli E.
Publication year - 2015
Publication title -
clinical implant dentistry and related research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.338
H-Index - 85
eISSN - 1708-8208
pISSN - 1523-0899
DOI - 10.1111/cid.12209
Subject(s) - soft tissue , implant , randomized controlled trial , dentistry , hard tissue , medicine , dental abutments , surgery
Abstract Background The advantages of platform switching using narrower abutments remain controversial. Many researchers suggest that platform switching can yield enhanced clinical results, while others remain skeptical. We hypothesize that the effectiveness of platform switching might be associated with the degree of reduction in size of the abutment. Purpose To radiographically and clinically examine a new abutment design created to move the implant‐abutment interface farther medially. Materials and Methods This was a prospective, randomized controlled clinical trial that included 27 patients (41 MIS L ance Plus® implants; MIS Implant Technologies, Karmiel, Israel). The patients' age ranged from 39 to 75 years. At the second stage of the surgery, the implants were randomly assigned to either the new platform switch T ulip abutment ( TA ) design or to the standard platform abutment ( SA ). Implant probing depth ( IPD ) and bleeding on probing ( BOP ) were recorded at baseline and after 12 months. Standardized periapical radiographs were taken (at baseline and at 12 months) and the marginal bone height measured. Results All implants were successfully integrated. The mean IPD at 1 year post‐op was 2.91 mm for the SA group and 2.69 mm for the TA group ( p > .05). Similarly, the BOP at 1 year was almost identical in both groups. The mean values of bone resorption at baseline were 0.98 ± 0.37 mm and 0.69 ± 0.20 for the TA and SA groups, respectively ( p > .05). Bone loss (baseline to 12 months) was significantly greater in the SA group compared with the TA group. Conclusions Use of the new TA , with its significantly downsized diameter, resulted in reduced bone loss at 1 year. Further research will be required to assess the long‐term effect of this abutment on peri‐implant health.