Transalveolar maxillary sinus floor elevation using osteotomes with or without grafting material. Part II: radiographic tissue remodeling

Clinical Oral Implants Research - Tập 20 Số 7 - Trang 677-683 - 2009
Bjarni E. Pjetursson1,2, Diana Ignjatovic2, Giedré Matuliené2, Urs Brägger2, Kurt Schmidlin3, Niklaus P. Lang4,2
1Department of Reconstructive Dentistry, Faculty of Odontology, University of Iceland, Reykjavik, Iceland
2School of Dental Medicine, University of Bern, Bern, Switzerland
3Research Support Unit, Institute of Social and Preventive Medicine, University of Bern, Bern, Switzerland
4Prince Philip Dental Hospital, The University of Hong Kong, Hong Kong

Tóm tắt

AbstractObjectives: To evaluate the pattern of tissue remodeling after maxillary sinus floor elevation using the transalveolar osteotome technique with or without utilizing grafting materials.Methods: During the period of 2000–2005, 252 Straumann® dental implants were inserted using the transalveolar sinus floor elevation technique in a group of 181 patients. For 88 or 35% of those implants, deproteinized bovine bone mineral with a particle size of 0.25–1 mm was used as the grafting material, but for the remaining 164 implants, no grafting material was utilized. Periapical radiographs were obtained with a paralleling technique and digitized. Two investigators, who were blinded to whether grafting material was used or not, subsequently evaluated the pattern of tissue remodeling.Results: The mean residual bone height was 7.5 mm (SD 2.2 mm), ranging from 2 to 12.7 mm. The mean residual bone height for implants placed with grafting material (6.4 mm) was significantly less compared with the implants installed without grafting material (8.1 mm). The implants penetrated on average 3.1 mm (SD 1.7 mm) into the sinus cavity. The measured mean radiographic bone gain using the transalveolar technique without grafting material was significantly less, 1.7 mm (SD 2 mm) compared with a mean bone gain of 4.1 mm (SD 2.4 mm), when grafting material was used. Furthermore, the probability of gaining 2 mm or more of new bone was 39.1% when no grafting material was used. The probability increased to 77.9% when the implants were installed with grafting material.Conclusion: When the transalveolar sinus floor elevation was performed without utilizing grafting material, only a moderate gain of new bone could be detected mesial and distal to the implants. On the other hand, when grafting material was used, a substantial gain of new bone was usually seen on the radiographs.

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Clinical Oral Implants Research

Tập 20 Số 7

677-683

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