Effectiveness of novel versustraditional anterior repositioning splints for anterior disc displacement with reduction of the temporomandibular joint

Abstract Background Anterior disc displacement with reduction (ADDwR) is a common subtype of temporomandibular disorders (TMD). Anterior repositioning splints (ARSs) serve 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 traditional Twin-Block splint (tTB) in the management of ADDwR. Methods A total of 118 patients with ADDwR were randomized to receive either an nMB or tTB splint. Clinical outcomes were assessed at baseline (T0) and 1 (T1), 3 (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 tTB group at T1 and T6. Joint pain: Greater symptom relief was observed in the nMB group at T3. 3. MMO: The nMB splint induced a significantly greater increase in MMO only at T1. Anterior disc displacement: CBCT evaluation revealed comparable outcomes between the two groups, with no significant differences in relative disc position. 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 tTB splint, while both splints exhibited similar efficacy in relieving joint pain and enhancing MMO. Although neither splint significantly improved disc reduction on CBCT, the nMB design offers a promising, patient-oriented approach for conservative treatment of ADDwR.