Abstract
ABSTRACTArtificial bone has been employed to reconstruct bone defects. However, only few reports on implant placement after block bone grafting exist. Objectives The purpose of this study was to evaluate the osseointegration of dental implant in bone reconstructions with interconnected porous calcium hydroxyapatite (IP-CHA).Material and Methods The IP-CHA cylinders (D; 4.3 mm, H; 10.0 mm) were placed into bone sockets in each side of the femurs of four male dogs. The IP-CHA on the right side was a 24-week sample. Twelve weeks after placement, a titanium implant was placed into a socket that was prepared in half of the placed IP-CHA cylinder on the right side. On the left side, another IP-CHA cylinder was placed as a 12-week sample. After another 12 weeks, the samples were harvested, and the bone regeneration and bone-implant contact (BIC) ratios were measured.Results New bone formation area was superior in the 24-week IP-CHA compared with the 12-week IP-CHA. BIC was not significantly different between IP-CHA and the parent sites. Osseointegration was detected around the implant in IP-CHA-reconstructed bone.Conclusion Our preliminary results suggest that IP-CHA may be a suitable bone graft material for reconstructing bones that require implant placement.
Highlights
Bone reconstruction in combination with bone JUDIWLQJ LV XVHG DW VLWHV ZLWK LQVXI¿FLHQW ERQH IRU proper implant placement
The implant and autologous bone were simultaneously placed on one side, while another implant was placed on the other side following autologous block bone grafting
This study demonstrates that osseointegration can be achieved in bone reconstructed using interconnected porous calcium hydroxyapatite (IP-CHA) blocks; notably, bone-to-implant contact ratio (BIC) and integration were equivalent to those observed in the parent bone site
Summary
Bone reconstruction in combination with bone JUDIWLQJ LV XVHG DW VLWHV ZLWK LQVXI¿FLHQW ERQH IRU proper implant placement. Dental implant placement using guided bone regeneration (GBR) LVTXLWHGLI¿FXOWZLWKODUJHERQHGHIHFWVFDXVHGE\ trauma, tumors, or severe periodontal disease. In such cases, implant placement is performed after bone reconstruction using bone grafting. The bone-to-implant contact ratio (BIC) in the delayed implant placement was higher than that in the simultaneous implant and autologous bone block placement. The bone-to-implant contact ratio (BIC) in the delayed implant placement was higher than that in the simultaneous implant and autologous bone block placement6 This suggests that implant placement after preliminary bone reconstruction would be suitable for GBR of large defects. Considering graft material shape, the granular type RI DUWL¿FLDO ERQH XVHG LQ *%5 LV GLI¿FXOW WR DSSO\ to large bone defects because of poor mechanical strength and retention morphology
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