Introduction: The loss of dental elements can lead to excessive bone loss in the posterior maxillary segments, which can limit the placement of dental implants in that area, the pneumatization of the maxillary sinus and the absence of dental elements to keep the bone active are some of the main causes. Among the wide range of available grafting materials, bovine hydroxyapatite has been extensively studied and has shown excellent clinical and histological results. Materials and methods: A total of 17 maxillary sinus floor elevations were performed (n = 8 Osteodens, n = 9 Bio-Oss). After a healing period of 6 to 8 months, a block of the grafted area was obtained using trephines and analyzed by histomorphometry. Results: The percentage of neoformed bone tissue was higher for Bio-Oss (39.0% ± 11.1) compared to Osteodens (33.4% ± 8.3), while the remaining graft values were slightly lower in...

Objective: Evaluate the biomechanical behavior of three implant brands with different surfaces by comparing stability parameters during placement and removal. Materials and Methods: An experimental study was conducted with 8 rabbits, in which 21 implants from three different brands were placed: ML Implant System®, Roster Dent®, and Biomet 3i® Osseotite. Seven implants of each brand were placed in each femur, and resonance frequency analysis was performed to measure the initial stability coefficient (initial ISQ). At 60 days, the final stability coefficient of the implants was measured. To measure removal torque, the implants were fixed in a press, and a Mark-10 precision digital torque wrench was used. Implants were removed by reverse rotation, recording the peak removal torque value. Results: Regarding initial-stage stability, the Roster Dent® and ML Implant System® groups showed h...