Affiliation:
1. Department of Stomatology Quzhou Hospital of Traditional Chinese Medicine Quzhou Zhejiang Province China
2. Department of Stomatology, the First Affiliated Hospital, College of Medicine Zhejiang University Hangzhou Zhejiang Province China
Abstract
AbstractObjectivesTo analyze the three‐dimensional stability and morphologic changes of tent space after the osteotome sinus floor elevation (OSFE) procedures without bone grafts.Materials and MethodsForty‐six implants placed using the OSFE technique with simultaneous implant placement without bone grafts were included in this retrospective study. Cone‐beam computed tomography (CBCT) scans of the augmented sinuses were obtained pre‐ and postoperatively up to 48 months of follow‐up. The maxillary sinus cavity profiles were outlined using three‐dimensional virtual reconstruction and superimposition of CBCT scans. The three‐dimensional changes in the tent space were measured. A generalized estimating equation (GEE) was used to explore potential factors.ResultsThe implant survival rate was 97.8%. The mean volume of remaining tent space immediately after surgery was 96.8 ± 70.5 mm3, shrinking to 31.0 ± 24.9 mm3 after 48 months, while the mean percentage of remaining tent space volume decreased to 29.1 ± 20.7%. The tent space volume and the percentage of residual tent space volume only decreased significantly within 12 months after surgery (p = .008, .013). GEE results indicated positive correlations between the percentage of remaining tent space volume and implant protrusion length (p = .000) and apical height (p = .000), with a negative correlation between the sinus floor area immediately after surgery (p = .002) and the healing time (p = .022).ConclusionsThe volume of the tent space rapidly shrank after OSFE without bone grafts. Several factors might influence the tent space stability. Long‐term clinical trials with larger sample sizes are necessary to further validate the results.