RELATIONSHIP BETWEEN TOMOGRAPHIC BONE DENSITY AND PRIMARY STABILITY OF OSTEOINTEGRATED IMPLANTS

• DOI: 10.22533/at.ed.1593892323108

• Palavras-chave: Cone beam tomography, CBCT, bone density, torque, dental implants

• Keywords: Cone beam tomography, CBCT, bone density, torque, dental implants

• Abstract:

  The objective of this study is to correlate the primary stability of implants, given by the insertion torque obtained during installation, to the tomographic bone density measured on cone beam tomography (CBCT), in the same region, considering factors such as age, gender, location, length and diameter of the implants. Data were collected from medical records of 19 patients attended in the specialization course in Implantology at ABO/Petrópolis-RJ, who underwent implant installation surgery between 2011 and 2015. From a total of 114 implants, the insertion torques were obtained, measured by the surgical torquemeter, immediately after insertion into the receptor site. In each patient's CBCT, using the Dental Slice® software, virtual implants were installed in the same positions corresponding to the implants described in the care record. Using the “Hounsfield line” tool present in the program, bone density values were recorded in 3 positions around the implant (buccal, apical and lingual/palatal), in 3 trans-axial sections of the tomography, obtaining an average which was considered the bone density in the region. The results were analyzed using parametric and non-parametric tests, with a significance level of 0.05. Density and torque were greater in the mandible than in the maxilla (p=0.000), and greater in type I and II bones than in type III and IV bones (p=0.000). A moderately significant correlation was found between bone density and implant torque (Spearman correlation coefficient=0.439; p=0.000), suggesting that CBCT can be used to predict insertion torque during surgical planning.