Radiographic Evaluation in the Diagnosis of Alveolar Bone Quality in Implant Rehabilitation

This study evaluated the optical bone density of the maxilla and mandible and correlate with the classification of bone quality of the Lekholm and Zarb (L \& Z). Sixty edentulous areas were evaluated. Panoramic and periapical radiographs were performed with an aluminum scale to evaluate the optical bone density. L \& Z classification was also applied. By using periapical radiographs, a statistically significant difference was observed in the optical bone density of the posterior maxilla (2.38 +/- 1.06) and the posterior mandible (3.84 +/- 0.68), when compared to the other regions (P <= 0.015). However, with panoramic radiographs, no differences were observed in the optical bone density (P = 0.6322). A negative correlation was observed between the L \& Z classification and the optical bone density obtained by the periapical radiographs (rho = -0.463; P < 0.001), that is, the worse the bone quality, the lower the bone density. However, there was no significant correlation with the bone density obtained by panoramic radiographs (rho = -0.009; P = 0.948). As for gender, a correlation between aging and the presence of medullary bone was observed in females, assessed by the L \& Z classification (rho = 0.398; P = 0.006). However, there was a correlation between aging and a denser and less medullary presence in males, both assessed by the L \& Z classification (rho = -650; P = 0.016), as well as the optical density assessed by periapical (rho = 0.621; P = 0.023) and panoramic (rho = 0.588; P = 0.035) radiographs. These results suggest that gender and age interfere with the bone quality and periapical radiographs are an acceptable method for evaluating bone density. However, a panoramic radiograph was not found to be a reliable method. (AU)