Effects of occlusal wear on 16‐year progression of non‐carious cervical lesions–Results of the study of health in Pomerania (SHIP‐START).

Background: It is still discussed whether occlusal wear (OW) affects the formation of non‐carious cervical lesions (NCCLs). Objective: To estimate effects of OW on the presence and development of NCCLs, using 16‐year follow‐up data from a cohort study. Methods: Occlusal and cervical defects were measured in 728 cast models (one from the upper jaw and one from the lower jaw) of 364 participants. Adjusted mixed‐effects ordinal logistic models analysing estimated cross‐sectional (N = 1308 teeth/291 subjects) and longitudinal (N = 718 teeth/226 subjects) associations of OW with NCCLs using tooth level data. Results: OW size was cross‐sectionally (OR = 1.74; 95% CI: 1.27–2.38 for OW size; OR = 0.97; 95% CI: 0.94–0.99 for squared OW size), but not longitudinally (OR = 1.14; 95% CI: 0.99–1.30) associated with odds of higher NCCL sizes. For cross‐sectional analyses, predicted probabilities of an NCCL size of 0 decreased from about 0.996 to 0.010 for OW sizes of 0 to 25. Conclusion: Results suggest an association between OW and NCCL size. However, as longitudinal results were non‐significant, while consistent in direction, large‐scaled cohort studies are demanded to more precisely estimate effect strength. [ABSTRACT FROM AUTHOR]