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Journal of Oral Science & Rehabilitation No. 1, 2018

I n d i v i d u a l i z e d t i t a n i u m s c a f f o l d s Dehiscence Parameter No Yes Dehiscence according to classification Point-shaped < 10 mm > 10 mm (large-scale) Not specified Distribution in % (number of cases) Table 5a 77.4 22.6 30.8 42.3 7.7 19.2 (89) (26) (8) (11) (2) (5) Table 5b Fig. 2 Group Number Grafted volume Percentile Valid Miss Average Std 98 22 76 17 3 14 979.4 1173.0 923.3 855.4 1145.0 751.6 Min 59 251 59 Max 4742 4742 3341 25th 391.3 419.8 385.3 Median 689.0 804.5 680.5 75th 1230 1403 1120 Total (P = 0.395)* With dehiscence Without dehiscence * Mann–Whitney U test. Table 5a Wound dehiscence. Total number of defect regions: n = 115. Table 5b Grafted volume is similar in defects with dehiscence to those without dehiscence. Total number of defect regions: n = 115. Fig. 2 Distribution of augmented volumes was not statistically different between defect sites with and without wound dehiscence, as calculated by the Mann–Whitney U test. Total number of defect sites: n = 115. no statistically significant association between the prevalence of dehiscence with demographic or surgical parameters was found. A tendency to greater dehiscence with regio iCTS might point to increasing prevalence of dehiscence with the width of the defect. One possible reason could be the greater disturbance of blood supply in larger defects that impairs optimal wound closure. However, this hypothesis needs further clinical and experimental analysis. Application of native collagen membranes did not show increased prevalence of membrane exposure or wound dehiscence.15, 16 An important advantage of iCTSs is the easy handling and the perfect fitting of the scaffolds, resulting in fewer injuries and shorter operation time. In contrast, conventional titanium scaf- folds need to be adapted during surgery, neces- sitating time-consuming cutting and bending of the scaffolds.9, 10 An evidence-based review on clinical results in alveolar ridge augmentation showed that an average horizontal and vertical volume gain of 3.7 mm is possible using particulate guided bone regeneration techniques.5 These results can be significantly improved by inlay or onlay bone grafts using extraoral bone blocks or by distrac- tion osteogenesis. However, these techniques seem to be accompanied by a higher complica- tion rate, that is, infection and loss of block 44 Volume 4 | Issue 1/2018 Journal of Oral Science & Rehabilitation

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