Does the Time of Osseointegration in the Maxilla and Mandible Differ?

Objectives: The objectives of the present study were to measure the implant stability quotient (ISQ) values at 3 different time points after the surgical insertion and to determine whether the time of osseointegration differs in the maxilla and mandible. Materials and Methods: To measure implant stability, resonance frequency analysis (RFA) was performed in 44 patients (40 women, 4 men) with a total of 100 Implacil De Bortoli implants; the patients were divided into 2 groups: group 1, implants in the maxilla (22 in the anterior maxilla and 37 in the posterior maxilla); and group 2, implants in the mandible (41 posterior mandibles). Using RFA, implant stability was measured immediately after implant placement to assess the immediate stability (time 1) and at 90 (time 2) and 150 (time 3) days. Results: Overall, the mean (SD) ISQ was 63.3 (6.63) (95% confidence interval [CI], 39-79) for time 1, 70.5 (6.32) (95% CI, 4688) for time 2, and 73.5 (6.03) (95% CI, 58-88) for time 3. In group 1, the mean (SD) ISQ was 61.8 (6.56) (95% CI, 39-79) for time 1, 68.8 (5.19) (95% CI, 57-83) for time 2, and 72.3 (5.91) (95% CI, 58-85) for time 3. In group 2, the mean (SD) ISQ was 65.5 (6.13) (95% CI, 44-75) for time 1, 72.9 (7.02) (95% CI, 46-88) for time 2, and 75.3 (5.80) (95% CI, 60-88) for time 3. Conclusions: The stability of the implants placed in the maxilla and mandible showed a similar evolution in the ISQ values and, consequently, on osseointegration; however, the implants in the mandible presented superior values at all time points.