Association Between Self-Reported Bruxism and tooth wear in Northern Finland Birth Cohort (NFBC) 1966
Dr. Anne Ekman1, Assoc. Prof. Ville Vuollo2, Dr. Anna-Sofia Silvola3, Prof. Kirsi Sipilä2, Assoc. Prof. Ritva Näpänkangas2
1 Päijät-Häme Central hospital, Research Unit of Oral Health Sciences, Faculty of Medicine University of Oulu, Oulu, Finland,
2 Research Unit of Oral Health Sciences, Faculty of Medicine University of Oulu, Oulu, Finland Medical Research Center, Oulu, Oulu University Hospital and University of Oulu,
3 Research Unit of Oral Health Sciences, Faculty of Medicine University of Oulu, Oulu, Finland
Objectives
Object: to investigate the progression of dental wear using digital dental models in 12-year longitudinal cohort study and to evaluate its association with the self-reported bruxism.
Materials and Methods
Methods: At first follow-up of the NFBC 1966 study the subgroup of subjects (n=101) was examined in 2000. Alginate impressions were taken from the dentition. The gypsum casts were digitized by using 3D surface laser scanner. At second follow-up in 2012 the digital 3D models were taken of the dentition of all subjects using an intraoral scanner. Data on sleep (SB) and awake bruxism (AB) was collected in 2012 through a questionnaire. Surface processing, registration and measurements of the tooth were accomplished by Rapidform2006 software at both time points. Association of average and percentage tooth wear with AB and SB was assessed using regression analysis.
Results
Progressive tooth wear of premolars, canines and incisors was associated with SB. Progressive tooth wear of canines was associated with AB.
Conclusions
Conclusion: Progressive tooth wear is associated with self-reported bruxism among middle-aged adults. Tooth wear was more extensive among subjects reporting SB compared to subjects reporting AB. Although further studies on possible confounding factors of this association is needed because the etiology of bruxism and tooth wear is multifactorial.