The effect of the recipient site depth and diameter on the implant primary stability in pig's ribs

ABSTRACT

PURPOSE: This study was performed to compare and evaluate the effect of recipient site depths and diameters of the drills on the primary stability of implant in pig's ribs.MATERIALS AND METHODS: An intact pig's rib larger than 8 mm in width and 20 mm in height; RBM(resorbable blasting media) surface blasted phi3.75 mm and 8.0 mm long USII Osstem Implants (Osstem Co., Korea) were used. To measure the primary stability, Periotest(R) (Simens AG, Germany) and Osstell(TM) (Model 6 Resonance Frequency Analyser Integration Diagnostics Ltd., Sweden) were used. They were divided into 6 groups according to its recipient site formation method: D3H3, D3H5, D3H7, D3.3H3, D3.3H5, D3.3H7. Each group had, as indicated, 10 implants placed, and total 60 implants were used. The mean value was obtained by 4-time measurements each on mesial, distal, buccal, and lingual side perpendicular to the long axis of the implant using Periotest(R) and Osstell(TM). For statistical analysis one-way ANOVA was used to compare the mean value of each group, and the correlation between placement depths and the primary stability, and that of measuring instruments was analyzed using SPSS 12.0.RESULTS: The primary stability of the implants increased as the placement depths increased (p<0.05), and showed a proportional relationship (p<0.01). The primary stability increased when the diameter of the recipient site was smaller than that of the implant but with no statistical significance. There was a strong correlation between Osstell(TM) and Periotest(R) (p<0.01).CONCLUSION: These results suggest that increasing the placement depth of implants enhances the primary stability of implant.