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Extracted tooth roots used for lateral alveolar ridge augmentation: a proof‐of‐concept study

Research paper by Frank Schwarz, Vladimir Golubovic, Kathrin Becker, Ilja Mihatovic

Indexed on: 18 Mar '16Published on: 17 Mar '16Published in: Journal of Clinical Periodontology



Abstract

To assess the efficacy of tooth roots used as autografts for lateral ridge augmentation and two‐stage early osseointegration of titanium implants.The maxillary premolars were randomly assigned to either endodontic therapy (PM‐E) or were left untreated (PM‐C). Retromolar cortical autogenous bone (AB) blocks served as controls. PM‐E/PM‐C and AB were used for ridge augmentation at chronic‐type defects in both lower quadrants (n = 8 foxhounds). At 12 weeks, titanium implants were inserted and left to heal for another 3 weeks. Histological analyses considered crestal ridge width (CW); augmented area (AA) and bone‐to‐implant contact (BIC).Both PM and AB grafts (exposures: AB = 3; PM‐C = 4; PM‐E = 7) were gradually involved in the bone remodelling process and associated with a replacement resorption. Median CW (PM‐C: 2.70 versus AB: 3.30 mm; PM‐E: 2.96 versus AB: 3.35 mm), AA (PM‐C: 7.55 versus AB: 8.56 mm2; PM‐E: 11.20 versus AB: 6.60 mm2) and BIC (PM‐C: 36.96 mm versus AB: 64.10%; PM‐E: 50.79 versus AB: 32.53%) values were comparable in both PM and AB groups (p > 0.05, respectively).Extracted tooth roots revealed a structural and biological potential to serve as an alternative autograft to autogenous bone. A higher exposure rate may be expected when using endodontically treated teeth.