Comparison of the relationship between value of radiographic bone density with resonance frequency analysis in dental i̇mplants: clincal study

Recently, immediate or early loading of dental implants is a clinically feasible concept. However, there are only few studies regarding the immediate or early loading of posterior maxillary implants supporting single-tooth crowns. The purpose of the present clinical study was to evaluate and investigate the difference in implant seconder stability parameters and bone density changes around, immediately, early and delayed loaded of single implants in the posterior maxilla. In this study 40 implants (Implantium, Dentium, South Korea) were placed in 34 patients. To determine prerequisites for immediate or early loading protocols; bone density value derived from CBCT(PreOpHu), subjective classification of bone quality(SKS), insertion torque value(ITV) and primary implant stability(ISQ_Primer) values were considered. 13 implants providing the prerequisites were loaded immediately, the other 13 of them were loaded early and 14 implants which, were not providing the prerequisites were loaded in delayed loading protocol. The seconder stability follow-up of the implants was made by using Osstell (RFA) device in 1st, 3rd, 6th, 9th and 12th months. Bone density around the implants was evaluated in the images from CBCT(12th month). Datas was statistically analyzed using one-way ANOVA followed by post-hoc TUKEY test (p=0,05). Significant differences were not detected between loading groups in terms of 1st month ISQ values. However, ISQ values in 12th months of the immediate loading group were statistically higher then delayed loading group. No significant differences could be detected in bone density around the implants between the loading groups. Also, significant correlations were detected between bone density values derived from CBCT, subjective classification of bone quality(SKS) and implant stability parameters (ITV, ISQ_Primer) Within the limitations of this study, immediate or early loading protocols can be used for single implants with the presence of pre-conditions in the posterior maxilla. Also CBCT can be used as an effective method for the assessment of bone density and for estimating the stability parameters before surgery.