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The International Journal of Oral & Maxillofacial Implants



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Int J Oral Maxillofac Implants 23 (2008), No. 5     15. Sep. 2008
Int J Oral Maxillofac Implants 23 (2008), No. 5  (15.09.2008)

Page 911-918, PubMed:19014162

A Long-term Retrospective Study of Two Different Implant Surfaces Placed After Reconstruction of the Severely Resorbed Maxilla Using Le Fort I Osteotomy and Interpositional Bone Grafting
Marchetti, Claudio / Pieri, Francesco / Corinaldesi, Giuseppe / Degidi, Marco
Purpose: In this retrospective study, the long-term survival and success rates of implants with 2 different surfaces placed in extremely atrophic maxillae augmented with Le Fort I osteotomy and interpositional bone grafts were assessed.
Materials and Methods: In 12 consecutive patients (7 female, 5 male; average age, 55 years; age range, 47 to 63 years), the resorbed maxilla was reconstructed using Le Fort I osteotomy in combination with interpositional iliac bone grafts. After 5 to 6 months, machined or titanium plasma-sprayed implants were inserted. The patients were followed clinically and radiographically for 6 to 12 years (mean 102 ± 24.42 months) after prosthetic loading. Implant outcome in terms of survival and success using Albrektsson's criteria was analyzed.
Results: In all cases, the bone-grafting procedures allowed implant placement. Of the 104 implants placed (53 machined and 51 titanium plasma-sprayed), 11 failed, resulting in an overall cumulative survival rate of 89.4%. When the success rate was calculated using the defined criteria, the cumulative success rate was 67.3%. The respective survival and success rates were 86.8% and 66.0% for the machined implants and 92.2% and 68.7% for the titanium plasma-sprayed implants. The mean marginal bone resorption was 2.91 ± 0.77 mm (range, 0.6 to 4.9 mm) around machined implants and 2.72 ± 0.84 mm (range, 0.7 to 5.3 mm) around titanium plasma-sprayed implants. No significant differences in survival, success rate, or marginal bone resorption were found between the 2 implant groups.
Conclusions: Le Fort I osteotomy combined with bone grafts and delayed implant placement gave predictable long-term results. There was a distinct relationship between implant survival and the long-term success rate. The implant surface had no significant effect on the survival, success rate, or marginal bone resorption.

Keywords: alveolar bone augmentation, atrophic maxilla, autogenous bone graft, dental implants, follow-up study, Le Fort I osteotomy