الفهرس 
INTRODUCTIONOnly 14 pages are availabe for public view
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Abstract
Abstract Objectives: The present study evaluated clinically and radiographically the efficacy of chitosan collagen membrane with and without nanohydroxyapatite particles, versus collagen or chitosan membrane with nanohydroxyapatite bone graft, in the treatment of class II mandibular furcation defects. Materials and Methods: Forty class II mandibular furcation defects in 13 patients were selected. The defects were selected with ≥3 mm horizontal probing depth according to criteria outlined by Hamp el al.,(35) , with clinical attachment level (CAL) ≥ 5 mm. They were treated with four different modilities, namely, collagen membrane plus chitosan mixed together as one membrane with nanohydroxyapatite particles on its surface (c/ch/OH) m* (group 1), collagen membrane plus chitosan mixed together as one membrane (c/ch) m (group 2), nanohydroxyapatite bone graft with collagen membrane (OH/c) g**+m (group 3), nanohydroxyapatite bone graft with chitosan membrane (OH/ch) g+m (group 4). The following clinical parameters were recorded: PI, PD, CAL and BOP at baseline, 6 & 12 months post therapy and furcation assessment (F) at baseline & 12 months post therapy. During the surgical procedure, the furcation depth (D), height (H), width (W) and trunk (T) were assessed. CBCT was taken at baseline & 12 months post-surgery. The following parameters (D, H, W and T) were assessed from sagital, coronal and axial sections of CBCT. Also 3D volume of furcation involvement was assessed using simplant software. Standardized periapical radiographs were taken at baseline & 12 months post-surgery. The collected data was statistically analyzed at the different follow up periods.