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A comparison of ICAGD (immediate complete anterior guidance development) to mock ICAGD for symptom reductions in chronic myofascial pain dysfunction patients.

The purpose of this study is to assess what impact shortening disclusion time to less than .5 seconds during right and left mandibular excursions has on myofascial pain(s) symptoms present in a dental student population. Twenty-five dental students, who exhibited symptomatology consistent with myofascial pains patient, were divided into a treatment, control, and an untreated group. They participated in an occlusal adjustment study which measured changes in disclusion time, as well as, myofascial pains muscular symptom remissions resultant from treatment. The treated group of ten subjects received ICAGD occlusal adjustments to shorten their disclusion time to less than .5 seconds per mandibular excursion. The goal of this therapy was to totally disclude the posterior teeth in a measurable time frame of .5 seconds or less. The control group of eight subjects received mock ICAGD with tooth polishing. The goal of this therapy was to simulate ICAGD adjustments for possible placebo effect on symptom remissions. The untreated group had their disclusion times measured but received no treatment to adjust, or to simulate adjustment to their occlusion. The goal of analyzing an untreated group was to attempt to show that mock treatment (performed on the control subjects), or no treatment (performed on the untreated subjects), resulted in no measurable change in the disclusion time in either of these two subject groups. Each subject was recalled for disclusion time measurement four to five times in a one-year period of observation, at which time, they were required to report their myofascial pains symptom status by answering an ordinal scale questionnaire. The results suggest that shortening disclusion time to less than .5 seconds per mandibular excursion can induce remissions of many muscular myofascial pains symptoms. Additionally, mock ICAGD occlusal adjustments did not appear to be a factor in the control subjects treatment response, as this group showed no statistically significant symptom remissions.