[Comparison of adverse oral behaviors between patients with anterior disc displacement without reduction and healthy individuals].

PURPOSE: To explore the differences in adverse oral behavior between patients with anterior disc displacement without reduction(ADDWoR) and healthy individuals without temporomandibular disorders(TMD).

METHODS

From January to October 2023, a total of 170 patients with clinically confirmed ADDWoR were recruited from the Department of Rehabilitation Medicine, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, and 165 healthy subjects were recruited as controls during the same period. All subjects completed baseline data survey and Oral Behavior Checklist(OBC). The scores of each item and the total score of OBC were compared between the two groups. Logistic regression was used to analyze the relationship between oral behavior and ADDWoR. SPSS 23.0 software package was used for data analysis.

RESULTS

The oral behavior scores of 16 items, sleeping oral behavior scores, waking oral behavior scores, and total OBC scores of the ADDWoR group were significantly higher than those of the healthy group(P＜0.05). Logistics regression analysis showed that the three behaviors of chin compression during sleep, teeth clenching and chin leaning forward or to one side when awake were risk factors for ADDWoR(P＜0.05).

CONCLUSIONS

Compared with non-TMD healthy individuals, ADDWoR patients have a higher frequency of multiple adverse oral behaviors, among which, the occurrence of 3 behaviors (compression of the chin during sleep, gnashing of the teeth and leaning of the chin forward or to one side when awake) can increase the risk of ADDWoR.