Objective Assessment of Tooth Mobility Using the Osstell Device

Background/Objectives: This study aimed to evaluate the applicability of Osstell for measuring natural tooth mobility using a custom-fabricated attachment and to assess its correlation with conventional methods. Methods: Sixteen patients (10 males, 6 females) with 94 permanent teeth were included. Mobility was assessed using the Miller Mobility Index, Periotest M, and Osstell Beacon. A custom titanium bracket bonded to the buccal surface enabled smartPeg attachment for Osstell measurements. Each tooth was measured twice, and mean values were recorded. Statistical analyses included Spearman’s correlation, Cohen’s kappa, and intraclass correlation coefficient (ICC). Results: Mean Periotest value was 12.70 ± 13.69, while mean Osstell values was 69.45 ± 19.37. Both devices showed excellent intra-examiner reliability (ICC >0.95). Periotest values demonstrated strong agreement with Miller classification (Kappa=0.763; p< 0.001), whereas Osstell showed weak agreement (Kappa=0.094; p=0.048). A strong negative correlation was observed between Periotest and Osstell values (r = –0.865; p < 0.001). Conclusions: The Osstell device demonstrated reproducible measurements in natural teeth but lower sensitivity compared with Periotest. Despite weak agreement with Miller classification, its strong negative correlation with Periotest suggests potential as an adjunctive tool for objective mobility assessment. Larger studies including different tooth groups are required to confirm clinical applicability. This study is registered at ClinicalTrials.gov (NCT07188168).