To replace the autogenous bone block graft in socket preservation technique that has disadvantages despite gold standard such as second surgery, more healing period and cost, the author introduces the surgical technique and five-year clinical outcome of using preformed autogenous tooth bone graft block (ABTB) which was fabricated from the patient's own extracted tooth, with simultaneous implant placement. Evaluations of the five-year clinical outcome were also performed with cone beam computed tomography (CBCT).ABTB is root dentin block composed of Type I collagen matrix with several osteoinductive non-collagenous proteins such as bone morphogenetic proteins (BMP) and dentin matrix proteins. Geometrically, alveolar bone morphology was maintained by ABTB as well as it has micropores (dentinal tubules) of 3-5 μm diameter and macropores of 0.2-0.3 mm diameter for enhancing osteoinductive and osteoconductive functions.Five year follow up with CBCT showed that alveolar bone volume and shape were maintained successfully which was repaired and restored by ABTB. This might become the effective technique for socket preservations given the well controlled long term follow up studies.
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