الفهرس 
IntroductionOnly 14 pages are availabe for public view
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Abstract
lveolar ridge volume loss after extraction is an irreversible process that includes both horizontal and vertical reduction. When implant-supported restorations are intended, alveolar ridge atrophy may have a significant effect on tooth replacement therapy. Three-dimensional bone loss is a permanent and irreversible event that occurs as a result of tooth extraction. The rate of resorption peaks in the first year, particularly in the first three months.
Implant stability and osseointegration prognosis are both dependent on sufficient peri-implant bone. A variety of grafting materials are required for bone augmentation procedures. The findings differ depending on the grafting materials used in combination with regenerative techniques. The ideal bone grafting material is biocompatible, accepts tissues, poses no risk of disease transmission, promotes bone regeneration, and maintains initial mechanical stability throughout the treatment period. In GBR barrier membranes must meet a few specific criteria in order to be used safely in dental applications. Since collagen is the basic structural unit of connective tissue, it is one of the widely used resorbable membranes.
The aim of this study was to compare amount of horizontal bone gain 4 months after alveolar ridge augmentation using IPRF Nano- micro Sticky Bone with perforated collagen membrane versus occlusive barrier membrane by clinical and Radiographic analysis & Histomorphometric analysis.
In the current study, a total of twenty patients were included, where each group was composed of ten participants. Two surgeries were carried out for each patient; the first surgery was for alveolar ridge augmentation (bone grafting) while the second surgery was for bone biopsy and dental implant placement.The width of the alveolar ridge labio-lingually was measured immediately after ridge augmentation and then after 4 months at time of implant placement by the bone caliper and by the CBCT. Also a Histomorphometrical Analysis was done by both Photomicrography & Morphometric analysis to assess bone quality.
For bone width reduction measurements non-perforated membrane group had lower mean of 4 months follow up than that for immediate post-operative. Same was recorded for the perforated membranes group. For histomorphometric analysis showed that the (mean of non-perforated membrane group) for the SA group was lower than those for perforated group, while for the AF group was lower than that of perforated membrane group. For the AS group was lower than that of perforated membrane group. Those differences were statistically significant.
For the bone quality analysis, the current study showed that among the AF (analysis of degree of mineralization of newly formed bone), the non-perforated membrane group showed lower mean than that of perforated membrane group.That difference was statistically significant.