Thirty patients will be selected from outpatient clinic of the Oral and Maxillofacial Surgery Department, Faculty of Dentistry, Mansoura University seeking for extraction of non-restorable mandibular posterior teeth For the 1st group: the socket will be grafted with completely demineralized dentin graft after 3 days of extraction, followed by delayed implant placement after 4 months. For the 2nd group: the socket will be grafted with partially demineralized dentin graft in in the same day of extraction, followed by delayed implant placement after 4 months.
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Histomorphometric evaluation:
Timeframe: 4 monhs
Histomorphometric analysis
Timeframe: 4 months
Bone density:
Timeframe: 12 months