Purpose: The purpose of this study is to evaluate correlation between fractal dimension (FD), implant stability quotient (ISQ) value and
insertion torque value (ITV) regarding to implant stability
Materials and Methods: A total of 18, 4×8 mm tapered-type implant (active II, Neo-biotech, Korea) was placed at 3 human cadaver’s
right and left maxillary posterior area. All cadavers have sufficient bone volume so that don't need bone graft and favorable bone quality
(D2 or D3). All placement procedures have done by single operator. ITV was recorded simultaneously with implant placement. After
implant placement, ISQ was measured four time from buccal and palatal side. The average of ISQ was used for analysis. FD value was
gained by White&Rudolph1’s method. 50×50 pixel size region of interest (ROI) was selected at second (FD_coronal) and seventh (FD_apical)
thread. For the analysis of correlation with each methods, Pearson correlation test was done with SPSS ver 20.0.
Results: Correlation analysis results of ISQ and ITV (r;0.667, P＜0.05), ISQ and FD_coronal (r; 0.604, P＜0.05), ISQ and FD_apical
(r; 0.677, P＜0.05), ITV and FD-coronal (r; 0.524, P＜0.05), ITV and FD_apical (r; 0.576, P＜0.05) have revealed distinct positive correlation
in all methods and the results were statistically significant.
Conclusions: The result of positive correlation of ISQ and ITV was similar with existing studies and both methods have become known
as a criterion of implant stability evaluation. FD evaluated in this study is simple to gain, inexpensive and has relatively lower radiation
dose compared to computed tomography (CT). Because FD can gain from periapical view. In this study, FD has distinct positive correlation
with ISQ and ITV, so it is useful clinical radiographic analysis technique for implant primary stability evaluation. (JOURNAL OF DENTAL
IMPLANT RESEARCH 2016;35(2):53-58)