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Local sinus lift for single-tooth implant. I: clinical and radiographic follow-up
Karl-Erik Kahnberg1, Mats Wallström, Lars Rasmusson
1Department of Oral and Maxillofacial Surgery, Institute of Odontology, The Sahlgrenska Academy at University of Gothenburg, Sweden. k-e_kahnberg@odontologi.gu.se
Background:
For single-tooth implant replacement in the posterior maxilla, it is often necessary to do an augmentation of the alveolar process because of post-extraction resorption and include part of the maxillary sinus.
Purpose:
The purpose of this study is to present a technique for a local sinus lift with autogenous bone in a one-stage procedure. Additionally, volume changes of the grafted area were evaluated radiographically up to 2 years.
Materials And Methods:
Twenty patients, 12 female and 8 males, were included in the study. Single-tooth replacement was made in the second premolar area in 7 cases and in the molar area in 13 cases. Local sinus lift and implant installation were made simultaneously. Abutment connection was made after 6 months of healing.
Results:
Two years of clinical and radiographic follow-ups have been made in all patients. The survival rate was 100%. The residual bone volume in the actual area was 2-5 mm preoperatively, after sinus lifting in mean 13 mm, after 1 year in mean 11.4 mm, and 2 years postoperatively in mean 10.6 mm.
Conclusions:
Local sinus lift with simultaneous bone augmentation and single-tooth replacement in the posterior maxilla is a predictable method although a certain bone volume reduction around the implant was evident at the 2-year follow-up.