الفهرس 
AcknowledgmentOnly 14 pages are availabe for public view
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Abstract
The present study investigated the bone regeneration potential of
xenografts versus Platelet-Rich fibrin in immediate implants in
mandibular premolars.
Twelve patients with an age range from 20-50 were enrolled in
this study. All patients were indicated for immediate implant placement with a total of 12 implants placed. The selection criteria was patient with sufficient alveolar bone height between the apices and the coronal part of the mental nerve to avoid nerve injury , sufficient buccal bone, and absence of any pathological lesion preoperative CBCT, and free of any medical conditions that may impair bone healing.
Aatraumatic extraction was carried out using periotomes.
Implants were placed into the socket of mandibular premolar followed by filling of jumping gap with xenograft in control group and PRF in study group.
Implant stability was measured after implant insertion, 2 weeks, 4weeks, 6 weeks, 10 weeks and 12 weeks The results showed that the measurements of primary stability forimmediately extracted sockets with PRF and implant placement weregreater than that with the xenograft; there was a statistically significant difference between the PRF group and the control group regarding measurements of primary stability.
The higher mean value was found in (PRF) group, while the lowest mean value was found in (Xenograft) group.