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Calvarial Model of Bone Augmentation in Rabbit for Assessment of Bone Growth and Neovascularization in Bone Substitution Materials
Published on: August 13, 2019
Extracted tooth roots used for lateral alveolar ridge augmentation: a proof-of-concept study
Frank Schwarz1, Vladimir Golubovic1, Kathrin Becker2
1Department of Oral Surgery, Universitätsklinikum Düsseldorf, Düsseldorf, Germany.
Objectives:
To assess the efficacy of tooth roots used as autografts for lateral ridge augmentation and two-stage early osseointegration of titanium implants.
Material & Methods:
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).
Results:
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 mm(2) ; PM-E: 11.20 versus AB: 6.60 mm(2) ) 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).
Conclusions:
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.
