Pobploy Petchmedyai.. Correlation between cortical bone thickness and implant stability. Master's Degree(Implant Dentistry). Mahidol University. Mahidol University Library and Knowledge Center. : Mahidol University, 2015.
Correlation between cortical bone thickness and implant stability
Abstract:
The objective of this research was to determine the relationship between cortical bone thickness measured by CBCT (cone beam computed tomography) and primary implant stability from RFA measurement (Resonance Frequency Analysis). A total of 12 implants were placed in 8 patients at the posterior mandible sites. The crestal cortical bone thickness, buccolingual bone thickness at 5 mm. below the alveolar crest, and bone quality of implant recipient sites were preoperatively recorded using CBCT. RFA measurements (ISQ value) were taken using an Osstell ISQ immediately after implant placement. The correlation between crestal cortical bone thickness and primary implant stability and correlation between buccolingual bone thickness and primary stability were tested using Pearson's correlation with a P value of less than 0.05 considered statistically significant. The results showed that mean crestal cortical bone thickness and buccolingual bone thickness at 5 mm. below the alveolar crest were 1.42 ± 0.65 mm. and 6.95 ± 1.37 mm., respectively. The bone at the implant sites was classified as bone quality type II and III. The mean ISQ value was 73.33 ± 6.14. No significant correlations were found between crestal cortical bone thickness and primary stability (r = 0.171, P > 0.05) and buccolingual bone thickness and primary stability (r = 0.473, P > 0.05). With the limitations of this study, crestal cortical bone thickness and buccolingual bone thickness seem not to influence the primary implant stability. Further research is required to confirm the outcome.