Rapid maxillary expansion and quad-helix are two well established appliances in dentistry used for posterior cross bite treatment. This study aims to compare this two different appliances in patients in their early mixed dentition, regarding treatment effects of the extra oral soft tissue but also dental and skeletal effects, if the children experience any pain and discomfort during treatment and the study also aims to make a cost minimization analysis. Comparison of these different treatments are barely made and no randomized controlled trial is yet published. No study has evaluated the difference of subjective experience during these two treatments. After this study we will know which one of these two appliances are the most effective, regarding cost minimization and treatment result but we are also able to put it in relation to the patients subjective experience
Study Type
INTERVENTIONAL
Allocation
RANDOMIZED
Purpose
TREATMENT
Masking
SINGLE
Enrollment
72
Correction of the unilateral posterior cross bite in children
Postgraduate Dental Education Center
Örebro, Sweden
Skeletal expansion at the level of the palatal median suture - the change fram Baseline
Skeletal expansion evaluated by computed tomography at three time points in both arms. The change in width of the palatal median suture is going to be evaluated and compared to the Baseline values, in both arms.
Time frame: At baseline, directly after expansion and one year after expansion
The change of inclination of teeth and alveolar bone and side effects between the time points
Dental effects and side effects evaluated by computed tomography at three time points in both arms.The change in degree of angulation and inclination of the dental structures (e.g. tooth inclinations) is going to be evaluated and compared to the Baseline values, in both arms.
Time frame: At baseline, directly after expansion and one year after expansion
Assessment of the soft tissue changes
3D assessment of the soft tissue changes during and after treatment by 3D -photography
Time frame: At baseline, directly after expansion, six months and one year after expansion
Evaluation of pain and discomfort
Questionnaire The Questionnaire has some questions with Visual Analogue Scale. With the minimum value of "0" and maximum value of "10". Higher values mean worse outcome. Other questions in the questionnaire have a "yes" and "No" nature.
Time frame: Three times during the first week after inserting the appliances
Evaluation of Temporomandibular Disorder (TMD)
Questionnaire The questionnaire has no scale and the questions have a "Yes" och "No" nature.
Time frame: Baseline and one year after expansion
Cost-effectiveness of two treatment modalities in treatment of posterior cross bite
Evaluation of both the direct and indirect costs of the treatment, number of emergency visits, treatment duration (in total) etc are going to be evaluated.
Time frame: Through study completion, an average of 18 months
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