Implant Site Development for the Proper Crown/Implant Ratio :Case Report

Implant Site Development for the Proper Crown/Implant Ratio :Case Report
H.-S. SEOK1, Y. HERR2, J.-B. PARK2, Y.-H. KWON2, and J.-H. CHUNG2, 1 Seoul Advantist Dental Hospital, South Korea, 2 College of Dentistry, Kyung Hee University, Seoul, South Korea
March 2004
Clinical Implant Studies
Objectives: The aim of this clinical trial was to improve the crown/implant ratio when the dental implants were installed in the vertically severe resorbed ridge of the maxillary posterior area. Simultaneous application of sinus elevation and vertical hard tissue augmentation may offer the sufficient bone quantity and improve the ridge height for the proper crown/implant ratio. Materials and Methods: We simultaneously applied the lateral window approach for sinus elevation and vertical hard tissue augmentation using GBR technique. This technique comprised with titanium mesh for barrier membrane and selective cell repopulation, autogenous block bone graft procured from ramus, and artificial bone grafts for the remaining space. The combination of deproteinized bovine bone mineral(Bio-Oss, Geistlich Pharma AG Wolhusen, Switzerland ) and demineralized freeze-dried bone allograft(Dembone¨¢?¢, Pacific Coast Tissue Bank, Los Angeles, USA) was utilized for the space-making materials. 6 months af! ter the sinus elevation and ridge augmentation, the dental implants were installed in the proper tri-dimensional position. Results: Sufficient bone was attained apically(with sinus elevation) and coronally(with GBR technique). The dental implants could be installed in the proper tri-dimensional position. The crown/implant ratio could be properly improved. Conclusion: This clinical case demonstrates that simultaneous application of sinus elevation and vertical hard tissue augmentation using titanium mesh with combined bone grafts not only offers the sufficient bone quantity but also improves the crown/implant ratio for the ideal tri-dimensional position of dental implants. Supported by the Korean Ministry of Health & Welfare, Grant No. 03-PJ1-PG1-CH08-0001.