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ePaper created 2018-01-31, 10:01:59 | version 1.38.0
| research Lingual BC Buccal BC Lingual BC Buccal BC Fig. 5a Fig. 5b Fig. 6a Fig. 6b Figs. 5a & b: Radiological analysis. Comparison between a titanium abutment (a) and a SKY elegance abutment (b). Figs. 6a & b: Histological analysis of the SKY elegance abutment. Detail of platform switching and connective -tissue insertion over platform. Connective tissue at four weeks (a). Connective tissue at eight weeks (b). and soft-tissue in growth at the top of the platform by reducing bacterial migration and, consequently, of soft-tissue ingrowth and peri-implant bone loss. Marginal bone loss is drastically reduced and the objective criteria for peri-implant inflammation are greatly improved.22 Human study Table 5 lists clinical parameters from human stud- ies at one, three and five months. Figures 7a to h show radiological findings at one, three and five months. Figures 8a and b show the customisation of a SKY elegance abutment. Rationale for single-stage treatments Successive insertions and reconnections when re- storing an implant according to conventional proto- cols provoke bacterial invasion and colonisation of the biological space and mark the onset of marginal bone loss. Offering treatment in a single session provides the biological benefits described and saves time and money, increasing patient satisfaction.23 Figs. 7a–h: Radiological analysis. Preoperative (a, e), at one month (b, f), at three months (c, g), and at five months (d, h). Rationale for platform switching The switch in implant platform diameter pre- vents apical migration of the epithelial attachment Titanium PEEK p value Buccal bone Mean ± Sd 1.96 ± 0.21 * 1.43 ± 0.11 0.013 Median 1.96 1.43 Lingual bone Mean ± Sd 1.78 ± 0.33 * 1.28 ± 0.43 0.031 Median 1.78 1.28 Tab. 4: Radiological analysis of bone first contact distance to the implant shoulder. Values as mean ± Sd and median. Non-parametric Friedman test analysis. (*) Significant differences with p < 0.05. 12 CAD/CAM 1 2018