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Abstract
Objective: To describe remodeling of the mesial and distal marginal bone level around platform-switched (PS) and platform-matched (PM) dental implants that were sandblasted with large grit and etched with acid over a three-year period. Materials and Methods: Digital periapical radiographs were obtained at the following time-points: during Stage I of the surgical placement of dental implants, before loading, immediately after loading (baseline), and one, three, six, 12, and 36 months after loading for measuring the horizontal and vertical marginal bone levels. Results: Sixty implants were successfully osseointegrated during the overall observation period. Vertical marginal bone levels for the PS and PM dental implants were 0.78 ± 0.77 and 0.98 ± 0.81 mm, respectively, whereas the horizontal marginal bone levels for the PS and PM implants were 0.84 ± 0.45 and 0.98 ± 0.68 mm, respectively. During the time leading up to the procedure until 36 months after the procedure, the average vertical marginal bone level resulted in less bone loss for the PS and PM groups—0.96 ± 1.28 and 0.30 ± 1.15 mm, respectively (p < 0.05). The mean levels of the horizontal marginal bone also showed increases of 0.48 ± 1.01 mm in the PS and 0.37 ± 0.77 mm in the PM groups from the time before loading until 36 months after the procedure. However, these increases were not statistically significant (p > 0.05). Conclusion: PS dental implants appeared to be more effective than PM implants for minimizing the mean marginal vertical and horizontal marginal bone loss during the three-year period. Regardless of which abutment connection was used, the dental implant in the present retrospective investigation exhibited minimal marginal bone remodeling, thus indicating long-term stability.
Highlights
Implant therapy is a reliable and predictable tool for dental rehabilitation that requires multiple factors for the maintenance of long-term treatment success and aesthetics
Gardner and Lazzara introduced the concept of platform switching (PS), which refers to the situation where a larger-diameter implant is combined with a narrower abutment, resulting in a shift of the implant abutment gap away from the implant shoulder [1,2,3,4]
We found that minimal vertical marginal bone remodeling occurred in all cases, which could be attributed to the remodeling of biological bone that occurs in the first year after the dental implant is loaded
Summary
Implant therapy is a reliable and predictable tool for dental rehabilitation that requires multiple factors for the maintenance of long-term treatment success and aesthetics. Gardner and Lazzara introduced the concept of platform switching (PS), which refers to the situation where a larger-diameter implant is combined with a narrower abutment, resulting in a shift of the implant abutment gap away from the implant shoulder [1,2,3,4]. The benefits and feasibility of PS have been discussed in. Res. Public Health 2019, 16, 2570; doi:10.3390/ijerph16142570 www.mdpi.com/journal/ijerph
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