The comparison of the clinical and muscular effects of traditional twin block and clear twin block::a randomized clinical trial

Abstract

Introduction: Tissue damage caused by the use of different orthodontic appliances is a common phenomenon. In this clinical trial study, we compared the muscular and clinical effects of two conventional and transparent twin block devices.

Materials and methods: 60 patients in need of growth correction treatment of skeletal class 2 - div 1 were selected and randomly divided into two groups (transparent twin block (intervention) and normal twin block (control)). Sequentially (numbered, sealed, opaque envelopes) were used for allocation concealment. Both the doctor and the speech therapist who performed the EMG test were not blinded to the groups, because the type of device It was clearly seen. To check the clinical effects, the cephalometric examination and the electromyograph device were used to evaluate the effects of the treatment 6 months after the treatment It was registered in the prepared checklist. SPSS software version 21 was used for comparison. One way ANOVA and TUKEY POST HOC TEST were used. Results: Both CTB and TTB devices are capable of making changes in the muscle activity of the muscles around the mouth. No significant difference was observed between CTB and TTB muscle activity after treatment. (P>.05) No significant difference was observed in the dental and skeletal effects of CTB and TTB devices. (P>.05) Conclusion: The clear twin block has acceptable muscular, skeletal and dental performance.