Abstract
(1) Background: In the lateral area of the maxilla, the alveolar bone can lose significant volume due to maxillary sinus pneumatization following teeth extractions. This preliminary study evaluated the effectiveness of a novel technique for one-stage sinus lifting and simultaneous implant placement in cases with less than 1.5 mm residual alveolar bone. The subsequent survival rate at 1-year post-occlusal loading was assessed. (2) Methods: 15 patients were selected, the main inclusion criteria were the partially edentulous area in the posterior maxilla with alveolar bone height of less than 1.5 mm below the sinus. All of the patients underwent one-stage sinus lifting, along with simultaneous implant placement using a “butterfly” anchorage device to optimize the primary stability and xenograft bone as graft material. At 6 to 9 months after surgery, the anchorage device was removed and implants were loaded. Panoramic x-ray images were used to assess the new bone formation, while the biological stability was measured using resonance frequency analysis. (3) Results: 15 implants were inserted. The mean implant stability quotient (ISQ) value was 71.3 (SD = ±2.51) and the mean healing period was 7.3 (SD = ±1.23) months. The mean bone height after the healing period was 14.4 (SD = ±2.05). A statistically significant correlation was found between the healing period and the ISQ value (Spearman rho = 0.684, sig. = 0.005). No statistically significant correlation was found between the ISQ value and the new regenerated bone height (Person r = 0.389, sig. = 0.152). Smoking was identified as a risk factor involved in postoperative complications. (4) Conclusions: The results of the present preliminary study demonstrated that the proposed “butterfly” technique was effective when performing one-stage sinus lifting and simultaneous implant placement in cases with less than 1.5 mm of residual alveolar bone. The survival rate was 100% at 1-year post occlusal loading.
Highlights
Introduction distributed under the terms andThe main goal of implant rehabilitation is the masticatory function
It has been shown that conventional radiographic imaging is only 73% reliable [4], while cone beam computed tomography (CBCT) is a more comprehensive and more accurate radiological investigation that may be considered indispensable nowadays, in cases where a sinus lift procedure is planned
As the protocol of the present study was one-stage sinus lifting and simultaneous implant placement in cases with less than 1.5 mm alveolar bone height, only 15 implants fulfilling this criterion were included in the statistical analysis
Summary
Introduction distributed under the terms andThe main goal of implant rehabilitation is the masticatory function. Bone loss is a subsequent consequence of tooth extraction that may undermine the optimal condition of the alveolar bone for implant placement. In the lateral area of the maxilla, the alveolar bone can lose significant volume due to maxillary sinus pneumatization following teeth conditions of the Creative Commons. An adjunct augmentation procedure is indicated in order to restore the subantral bone volume. The goal of maxillary sinus lifting is to raise the Schneiderian membrane and augment the resulting space with a biomaterial in order to restore the subantral bone height. The prerequisites for this procedure demand a careful pre-operative assessment of the maxillary sinus conditions. It has been shown that conventional radiographic imaging is only 73% reliable [4], while cone beam computed tomography (CBCT) is a more comprehensive and more accurate radiological investigation that may be considered indispensable nowadays, in cases where a sinus lift procedure is planned
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