In a prospective longitudinal study design, details in jaw-neck kinematics and electromyography (EMG) activity changes in patients (women and men) referred for surgical correction of basal relations between the maxilla and mandible over time; pre-operative and during follow-up 8 weeks and 18 months after surgical correction will be evaluated. The results will contribute with novel insights on jaw-neck motor function before, in short- and long-term after the surgical process. We will have blinded evaluation of outcomes.
Consecutive patients referred to department of Oral and Maxillofacial Surgery, Umeå University Hospital for corrective maxillofacial-mandibular surgery, will offer opportunity to be included in the study. Expected number of patients: 20 - 25 patients annually. Blinded evaluation will be pre-operative and during follow-up 8 weeks and 18 months after surgical correction.
Study Type
INTERVENTIONAL
Allocation
NA
Purpose
TREATMENT
Masking
NONE
Enrollment
40
Surgical corrections of the maxilla and/or the mandible. Integrated jaw-neck movement patterns, muscle activity, bite force and occlusal contact area will be registered and mapped with quantitative objective functional variables. The state-of-the-art core equipment to evaluate jaw-neck motor function in detail is located in the Movement Lab (Department of Odontology, Umeå University).
Faculty of Medicine, Department of Odontology, Umeå University
Umeå, Sweden
Change in Kinematic outcome variables
Jaw and head movement amplitudes (mm)
Time frame: Preoperatively, postoperatively 8 weeks, 18 months
Change in Kinematic outcome variables
Movement cycle time (s)
Time frame: Preoperatively, postoperatively 8 weeks, 18 months
Change in Kinematic outcome variables
Movement acceleration from start to peak (mm/s2)
Time frame: Preoperatively, postoperatively 8 weeks, 18 months
Change in Kinematic outcome variables
Jaw movement area (mm2)
Time frame: Preoperatively, postoperatively 8 weeks, 18 months
Change in Kinematic outcome variables
Jaw movement volume (mm3)
Time frame: Preoperatively, postoperatively 8 weeks, 18 months
Change in Electromyography (EMG)
Muscle activity in micro-Volt in jaw and neck muscles bilaterally
Time frame: Preoperatively, postoperatively 8 weeks, 18 months
Change in Maximum voluntary occlusal bite force (MVOBF)
Newton (N)
Time frame: Preoperatively, postoperatively 8 weeks, 18 months
Change in Occlusal contact area
mm2
Time frame: Preoperatively, postoperatively 8 weeks, 18 months
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