Abstract
The benefits and feasibility of platform switching have been discussed in several studies, reporting lesser crestal bone loss in platform-switched implants than in platform-matched implants. Objective. The aim of the present study was to observe the changes in vertical and horizontal marginal bone levels in platform-switched and platform-matched dental implants. Materials and Methods. 51 patients received 60 dental implants in the present study over a 1-year period. Measurement was performed between the implant shoulder and the most apical and horizontal marginal defect by periapical radiographs to examine the changes of peri-implant alveolar bone before and 12 months after prosthodontic restoration delivery. Results. These marginal bone measurements showed a bone gain of 0.23 ± 0.58 mm in the vertical gap and 0.22 ± 0.53 mm in the horizontal gap of platform matching, while in platform switching a bone gain of 0.93 ± 1 mm (P < 0.05) in the vertical gap and 0.50 ± 0.56 mm in the horizontal gap was found. The average vertical gap reduction from the baseline until 12 months was 0.92 ± 1.11 mm in platform switching and 0.29 ± 0.85 mm in platform matching (P < 0.05). Conclusions. Within the limitations of the present study, platform switching seemed to be more effective for a better peri-implant alveolar bone vertical and horizontal gap reduction at 1 year.
Highlights
Dental implant therapy is considered an appropriate treatment for edentulous and partially dentulous patients since Dr Branemark began performing dental implant operations on edentulous patients in 1965
Patients requiring single-tooth extraction were selected according to the following selection criteria: good systemic health; nonsmoking or smoking ≤ 10 cigarettes/day; good oral hygiene; full-mouth plaque score (FMPS) ≤ 25% at baseline; full-mouth bleeding of probing (FMBS) ≤ 25% at baseline; probing pocket depth (PPD) at six aspects of the teeth adjacent to the implant site ≤ 3 mm; periodontal attachment level (PAL) at six aspects of the teeth adjacent to the implant site ≤ 2 mm; absence of active infection around the surgical site; presence of natural teeth adjacent to the implant site; adequate bone tissue to ensure implant primary stability; presence of keratinized tissue (KT) ≥ 2 mm; stable posterior occlusion; absence of parafunctional habits
Findings from the present study revealed that the vertical and horizontal bone gaps were reduced at the end of the 12 months in comparison with the gaps before loading, there was minimal marginal bone remodeling in all cases; this could be attributed to the biological bone remodeling that occurs in the first year after dental implant loading (Figure 5)
Summary
The aim of the present study was to observe the changes in vertical and horizontal marginal bone levels in platform-switched and platform-matched dental implants. The aim of the present study was to observe the changes in both vertical and horizontal marginal bone defect measured between the implant shoulder and the most apical and horizontal marginal defect by using periapical radiographs to examine the changes in mesial and distal peri-implant alveolar bone before and 12 months after prosthodontic restoration delivery between platform-switched and platform-matched dental implants. The aim of this study was to evaluate the changes in both vertical and horizontal bone gaps between the periimplant crestal bone and the dental implant surface
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