Christopher Riben, Susanne Lewin, Johan Kämpe, Caroline Öhman-Mägi, Andreas Thor
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引用次数: 0
Abstract
Purpose: To assess, using CBCT, the volume and height of bone formation after open maxillary sinus elevation without the use of grafts. Materials and Methods: The study was retrospective and included 24 patients with a total of 67 implants. CBCT examinations were conducted at baseline (0 to 43 days postsurgery) and after an average healing period of 6.2 months (range: 5.1 to 7.8 months). The image analysis included metal artifact reduction, registration, and a standardized protocol for segmenting the anatomical structures of the maxillary sinus, including calculating the 3D volumetric changes after bone formation. Conventional manual 2D measurement of vertical bone formation was executed for comparison. Clinical factors assumed to be relevant for bone formation were obtained from patient medical records. Results: One implant was lost before prosthetic loading, representing an early implant loss rate of 1.5%. Differences in intra- and interexaminer reproducibility were registered for the conventional 2D method (P < .05). The average vertical bone formation measured with the 2D method was 4.8 mm (4.6 to 5.0 mm), covering 60.2% of the implant height within the sinus. The average volumetric bone formation measured with the developed 3D image-analysis method was 801 mm3 in total and 195 mm3 in a restricted region around each implant. Bone formation was registered in 62% of the volume of the restricted region. A correlation regarding bone formation was found between the two methods (R2 = 0.705). Clinical factors such as age, smoking, general health, and postoperative complications did not correlate with the amount of bone formed. Conclusion: CBCT image analysis is a promising method for objective 3D evaluation of bone formation after sinus elevation. A correlation was seen between the manually measured bone height (2D) and the bone volume in a restricted region around each implant using the developed method (3D). Reducing visual interpretation minimizes errors related to examiner reliability. Clinical factors did not significantly affect the volumetric bone formation.
期刊介绍:
Edited by Steven E. Eckert, DDS, MS ISSN (Print): 0882-2786
ISSN (Online): 1942-4434
This highly regarded, often-cited journal integrates clinical and scientific data to improve methods and results of oral and maxillofacial implant therapy. It presents pioneering research, technology, clinical applications, reviews of the literature, seminal studies, emerging technology, position papers, and consensus studies, as well as the many clinical and therapeutic innovations that ensue as a result of these efforts. The editorial board is composed of recognized opinion leaders in their respective areas of expertise and reflects the international reach of the journal. Under their leadership, JOMI maintains its strong scientific integrity while expanding its influence within the field of implant dentistry. JOMI’s popular regular feature "Thematic Abstract Review" presents a review of abstracts of recently published articles on a specific topical area of interest each issue.