Evaluation the effect of disclusion time reduction (Dtr) in management myofacial pain syndrome in iraqi patients using the digital occlusal analysis (t-scan)

Abstract

The aim of the study is to evaluate the effectiveness of disclusion time reduction in treatment of myofacial pain syndrome using immediate complete anterior guidance development (ICAGD) protocol monitored by digital occlusal analysis (T-scan). Methods and materials: Subjects with full dentition and angle class I relation. DC/TMD criteria were used to diagnose the patients with various MFDS symptoms including mouth opening (assisted and unassisted), excursion movements (mediotrusion and protrusion) and painful masticatory muscles involvement. A visual analog scale was used to assess the pain intensity. Disclusion Time Reduction (DTR) of all molars and premolars to < 0.5 second on all studied locations include: (Centric relation, Maximum intercaspation, Right lateral, left lateral and protrusion) have been made, the patients were recalled tow times at the 7th day and 14th day for the follow up and the subjects were assessed for the symptoms relief. Results: Highly significant difference P≤ 0.001 in period (1st day pretreatment-7th day post treatment) and(1st day pretreatment-14th day post treatment) related to changes in disclusion time and all symptoms of MFDS but in period (7th day post treatment-14th day post treatment),the data outside the comparison limited (OCL) was stated according to the pain intensity, mouth opening (assisted and unassisted)and excursion movements while a non-significant difference P>0.05 were documented related to changes in disclusion time and painful masticatory muscle involvement . Conclusion: The results showed the DTR less than 0.5 seconds reduces musculoskeletal-based symptoms of MFDS patients, and this method can be used clinically with highly success in treatment MPDS.