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  • Title: Individual prediction of treatment outcome in patients with temporomandibular disorders. A quality improvement model.
    Author: Sundqvist B.
    Journal: Swed Dent J Suppl; 2007; (186):8-42, 1p preceding table of contents. PubMed ID: 17674664.
    Abstract:
    The general aim of this thesis was to create and evaluate a quality improvement model for prediction of treatment outcome in patients diagnosed with Temporomandibular Disorders (TMD) of either Muscle or Mainly TMJ (Temporomandibular Joint) origin, treated with interocclusal appliances and/or occlusal adjustment. The model was assumed to generate negative predictors of treatment outcome through evaluating all patients predicted Good reaching an objective treatment goal but not having an improvement of 50% or more. The model was created and evaluated by one TMD specialist. The questions were: (I) Was it possible for the TMD specialist to predict treatment outcome individually in patients diagnosed with TMD and, from the results, create a quality improvement model? (II) Was it possible for eight TMD-trained general dental practitioners, under the supervision of the TMD specialist, to treat TMD patients with similar results to the TMD specialist if the TMD specialist had examined, treatment planned, and individually predicted the treatment outcome? (III) Was it possible for the TMD specialist to improve the possibility to predict individual treatment outcome overtime? (IV) Was it possible for one TMD-trained general dental practitioner to copy the clinical part of the model and achieve the same results as the TMD specialist, in patients selected by the TMD specialist? Out of 5165 patients subjected to a functional examination of the masticatory system, 3602 were diagnosed with TMD and subgrouped as either Muscle or Mainly TMJ symptoms. The patients were predicted to have a Good, Dubious, or Poor possibility to have an improvement of 50% or more after treatment. Patients predicted Poor were not offered any treatment. A correct prediction of actual treatment outcome Good was defined as an improvement of 50% or more for muscle and/or TMJ symptoms. A total of 2625 patients began treatment at the specialist clinic for TMD and 2128 completed the full course of treatment. The patients were treated with counseling, interocclusal appliances and/or occlusal adjustment. Treatment outcome was evaluated at an objective treatment goal as improvement in percent using a verbal Numeric Rating Scale ranging from 0 to 100. The results suggest that (I) individual treatment outcome can be predicted in patients with TMD treated by one specialist in TMD and a quality improvement model could be created, (II) eight TMD-trained general dental practitioners could, under the supervision of the TMD specialist, treat TMD patients with similar results to the TMD specialist, (III) the TMD specialist could improve the possibility to predict individual treatment outcome over time, and (IV) the clinical part of the model could be copied by one TMD-trained general dental practitioner with similar results to the TMD specialist. In conclusion, the model works in the hand of one TMD specialist and the clinical part for one general dental practitioner, but it needs to be evaluated by other clinics/clinicians before it can be claimed to be generalizable. The model has identified new negative predictors for treatment outcome in patients with TMD. These predictors need to be investigated further in well controlled clinical trials. The created model is a PDSA cycle.
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