The Effect of a Combined Home-based Orofacial Exercise Program on Oral Aperture of Patients With Systemic Sclerosis: a Single-blind Prospective Randomized Controlled Trial

The study was designed as a single-blind, prospective, randomized controlled study with a 2-month follow-up period, carried out in rheumatology outpatient clinic, between March 2017 - January 2019. Systemic sclerosis patients with an oral aperture of <40mm were included in the study. Patients were randomly divided into two groups. Randomization was done as the sealed envelope method. After the informed consent was taken, the opaque envelope that the patient have chosen was opened and patients were offered the allocated treatment regimen. Group 1 was given exercise regimen and oral hygiene care advices for the first one month; followed by no exercise but oral hygiene care advices for the next four weeks. Group 2, as the control group, received oral hygiene care advices for the first one month, followed by the exercise regimen twice a day along with oral hygiene care advices for the next four weeks. Oral care advices were given to every participant by a dentist involved in the study at their first visit. With this protocol, we aimed (a) to investigate whether there is a benefit of the exercise program on microstomia; (b) to observe the carryover effect of exercise therapy on microstomia after discontinuing the treatment over a period of time; (c) to estimate the intervention strategy by comparing the same medical approach with different sequences. The exercise program was demonstrated to patients by a clinician at the first visit and given to all patients printed as a manual to be done every day for one month duration of the exercise program. Additionally, a diary was given to patients to mark when they have completed the exercise and to note in the case of pain on daily basis. The exercise regimen was developed on the basis of previous studies and clinical knowledge.