Effectiveness of a Novel Mono-Block Splint Versus a Twin-Block Splint for Anterior Disc Displacement With Reduction: A Randomised Controlled Trial.

BACKGROUND

Anterior disc displacement with reduction (ADDwR) is a common subtype of temporomandibular disorders (TMD). Anterior repositioning splint (ARS) serves as a key conservative treatment modality. This study aimed to compare the clinical efficacy of a novel Mono-Block splint (nMB) with that of a Twin-Block (TB) splint in the management of ADDwR.

METHODS

A total of 118 patients with ADDwR were randomised to receive either an nMB or TB splint. Clinical outcomes were assessed at baseline (T0), 1 month (T1), 3 months (T3) and 6 months (T6). CBCT scans were obtained at T0 and T6, and patient satisfaction was evaluated at T6.

RESULTS

Joint noise: The nMB group showed significantly greater improvement than the TB group at T1 and T6. Joint pain: Greater symptom relief was observed in the nMB group at the third time point (T3). MMO: The nMB splint induced a significantly greater increase in MMO only at T1. The condyle-fossa relationship: CBCT evaluation revealed comparable outcomes between the two groups, with no significant difference. Patient satisfaction: The nMB splint achieved significantly higher ratings in general satisfaction, comfort and stability, while no significant differences were noted in cleaning and retention.

CONCLUSION

The nMB splint demonstrated superior effectiveness in reducing joint noise and improving patient comfort compared to the TB splint, while both splints exhibited similar efficacy in relieving joint pain and enhancing MMO. The nMB design offers a promising, patient-oriented approach for conservative treatment of ADDwR. Future studies will incorporate more comprehensive assessments, including MRI evaluation, and extend the follow-up period beyond 6 months to better determine the long-term therapeutic effectiveness of the nMB splint.