Torres, JesúsTamimi, FalehMartínez, Pedro PabloAlkhraisat, MohammadLinares, RafaelHernandez, GonzaloTorres-Macho, JuanLópez-Cabarcos, Enrique2011-12-022011-12-022011-12-021742-7061http://hdl.handle.net/10115/58586 7 Objective: The combination of anorganic bovine bone (ABB) with platelet rich plasma ABSTRACT 8 (PRP) has been widely used in bone regeneration procedures although its benefits are 9 10 11 12 13 14 15 16 17 18 19 20 a histology level and any adjunctive effects, we performed an ancillary study in 5 still unclear. The purpose of this study was to evaluate whether or not PRP improves the efficacy of ABB in sinus floor augmentation. In addition, we have investigated the effect of residual bone height and tobacco on implant survival in sinus augmentation procedures. Materials and Methods: 87 patients recruited for this study underwent 144 sinus floor augmentation procedures using ABB alone or ABB plus PRP (ABB+PRP) in a randomized clinical trial. A total of 286 implants were placed in the augmented bone, and their evolution was followed up for a period of 24 months. In order to investigate on 21 edentulous patients with symmetrical severely resorbed maxilla. In these patients, a 22 23 24 25 26 27 Results: Overall, 96.2% of ABB and 98.6% of ABB+PRP implant success was 28 bilateral sinus augmentation was randomly performed using ABB or ABB+PRP in a split-mouth design, and after 6 months, bone biopsies were taken from the implant sites for histological and histomorphometric analysis. obtained during the monitoring period and differences were not found between sites grafted with and without PRP in the 87 patients studied. Densitometry assessments and graft resorption were similar in both experimental groups. However, the histological and histomorphometrical analysis in the 5 edentulous patients revealed that bone 29 30 31 32 33 augmentation was significantly higher in sites treated with ABB+PRP (p¿0.05). 34 Another outcome from our study is that the lack of initial bone support (p¿0.05) and smoking (p=0.05) appeared to have a negative effect on the treatment success, that was accentuated when both circumstances coincided. 35 36 37 38 39 40 procedures. However, this study revealed that PRP can improve the osteoconductive 41 Conclusions: PRP is not a determining factor for implant survival in sinus lifting properties of ABB by increasing the volume of new bone formed. Moreover, in sinus augmentation procedures implant¿s survival rate seems more influenced by the residual bone height or by tobacco than by the type of bone graft. 42 43 44engbone regenerationprpinfo:eu-repo/semantics/articleinfo:eu-repo/semantics/openAccess3213.04 Cirugía de Huesos3213.13 Ortodoncia-Estomatología