does caffeine affect dental implant stability? a prospective cohort study

Statement of the problem: caffeine intake affects bone metabolism through inhibition of osteoblast proliferation. purpose: this study aims to assess the effect of caffeine consumption on implant stability in the healing period of patients. materials and method: a prospective cohort study is designed to assess implant stability in the posterior of the maxilla. patients were divided into two groups based on daily caffeine intake as group 1 with consumption of 400 mg/daily caffeine or more, and group 2 with consumption of 100 mg/daily caffeine or less. the implant stability was measured by reso-nance frequency analysis (rfa). the mean implant stability quotients (isqs) were calculat-ed. rfa measurements were made at 4, 6 and 8 weeks after implant placement. results: a total of 102 patients were studied (51 in each group). the mean of isq was 43.49± 2.32 in the group 1 and 42.78±2.34 in the group 2 at four weeks after insertion. the mean of isq was 50.86±3.06 in group 1 and 51.37±2.44 in the group at six weeks after implant placement. at eight weeks after implant surgery, the mean of isq was 56.78±3.77 in the group 1 and 57.84±1.82 in the group 2. the mean of isq between the two groups at 4, 6 and 8 weeks after implant placement was not statistically different. (p= 0.13, p= 0.36 and p= 0.08 respectively) the repeated measure test indicated a similar increase in isq in vari-ous study times in the two studied groups (p=0.47, df=1, f=0.52). conclusion: acquired data suggest that caffeine intake may not have a negative effect on implant stability in the healing period at the posterior of the maxilla.