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Simultaneous Block Bone Grafting Using "L-Shaped Notch" Preparation in Mandible: Case Series and 1-Year Follow-up
Dong-Woon Lee1, Jin-Wook Lee, Hyun-Chang Lim
1*Faculty, Department of Periodontology, Veterans Health Service Medical Center, Seoul, Korea. †Resident, Department of Periodontology, Veterans Health Service Medical Center, Seoul, Korea. ‡Clinical Assistant Professor, Department of Periodontology, School of Dentistry, Kyung Hee University, Seoul, Korea. §Assistant Professor, Department of Periodontology, School of Dentistry, Kyung Hee University, Seoul, Korea. ‖Professor, Department of Periodontology, College of Dentistry, Yonsei University, Seoul, Korea. ¶Chairman, Department of Periodontology, Veterans Health Service Medical Center, Seoul, Korea.
Purpose:
A novel autogenous block bone grafting technique with simultaneous placement of dental implants is described for several cases of horizontal ridge augmentation.
Methods:
Seven patients with a mandibular horizontal ridge that was inadequate for proper implant placement were included in this study. Simultaneous implant placement and autogenous block bone grafting was planned; we designed the "L-shaped notch" preparation of the recipient site for the additional fixation with only 1 screw. This new technique also required minimal size of autogenous block bone.
Results:
In total, 11 implants and final restorations were delivered in 7 patients. The dehiscence defects were covered successfully (79.70 ± 5.58%; 2.26 ± 0.68 mm) at the uncover surgery. The marginal bone loss was 0.50 ± 0.26 mm on the mesial side and 0.58 ± 0.23 mm on the distal side. The outcomes were satisfactory clinically and radiographically during the 1-year follow-up.
Conclusion:
Although additional studies, with more than 7 patients, are needed to evaluate the L-shaped notch preparation, this was effective to accomplish horizontal ridge augmentation simultaneously with the placement of dental implants using the minimal size of autogenous block bone.
