Clinical Outcome of Dental Implants after Maxillary Sinus Augmentation with and without Bone Grafting: A Retrospective Evaluation

Abstract

(1) Background: The purpose of the present study was to retrospectively evaluate and compare the outcome of two sinus augmentation grafting protocols using a xenograft or blood clot alone over a 72-month follow-up. (2) Methods: Patients who received simultaneous lateral sinus floor augmentation and implant placement were included. Subjects were divided into two groups according to the grafting material, namely xenograft or blood clot, and into sub-groups based on the residual alveolar bone height (RABH) below the maxillary sinus, namely 4 to 6 mm or > 6 mm. Kaplan–Meier survival estimates were calculated for each material group and for each sub-group at 1, 3, and 6 years. (3) Results: In total, 289 implants inserted in 136 patients with a one-stage procedure were considered. A total of 35 failures were registered. Overall survival rates were 94.2% for xenograft and 85.9% for blood clot alone at 1 year, 91.1% and 81.6% at 3 years, and 91.1% and 78.7% at 6 years. (4) Conclusions: In patients with 4–6 mm RABH, graftless interventions exploiting blood clot alone were not as successful as those using xenograft. When the RABH is low, sinus floor augmentation associated with grafting materials should be preferred whenever possible.

Prediction of the bone volume for sinus augmentation through 3-dimensional analysis

“…The amount of available bone can be increased through maxillary sinus augmentation, which increases the survival rate of implants. 12 , 13 , 14 However, little is known regarding how much bone graft material is required. Therefore, the goal of this study was to calculate the amount of bone graft required for maxillary sinus augmentation that allows an implant fixture of a specific length.…”

Evaluation of volume changes following lateral window maxillary sinus floor elevation using Minics software

“…Bone augmentation through maxillary sinus floor elevation is widely used to treat vertical bone deficiency in the maxillary posterior area. Maintaining graft stability during maxillary sinus elevation is key to successful surgery (1)(2)(3)(4)(5)(6).…”