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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.
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| Label | Type | Description | Intervention Names |
|---|---|---|---|
| Prospective longitudinal study design | Other | Patients that will undergo orthognatic surgery will be given opportunity to participate in jaw and neck motor function analysis. |
|
| Name | Type | Description | Arm Group Labels | Other Names |
|---|---|---|---|---|
| Orthognathic surgery | Procedure | 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). |
| Measure | Description | Time Frame |
|---|---|---|
| Change in Kinematic outcome variables | Jaw and head movement amplitudes (mm) | Preoperatively, postoperatively 8 weeks, 18 months |
| Change in Kinematic outcome variables | Movement cycle time (s) | Preoperatively, postoperatively 8 weeks, 18 months |
| Change in Kinematic outcome variables | Movement acceleration from start to peak (mm/s2) | Preoperatively, postoperatively 8 weeks, 18 months |
| Change in Kinematic outcome variables | Jaw movement area (mm2) | Preoperatively, postoperatively 8 weeks, 18 months |
| Change in Kinematic outcome variables | Jaw movement volume (mm3) | Preoperatively, postoperatively 8 weeks, 18 months |
| Change in Electromyography (EMG) | Muscle activity in micro-Volt in jaw and neck muscles bilaterally | Preoperatively, postoperatively 8 weeks, 18 months |
| Change in Maximum voluntary occlusal bite force (MVOBF) | Newton (N) | Preoperatively, postoperatively 8 weeks, 18 months |
| Change in Occlusal contact area | mm2 |
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Inclusion Criterias:
Exclusion Criterias:
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| Facility | Status | City | State | ZIP | Country | Contacts |
|---|---|---|---|---|---|---|
| Faculty of Medicine, Department of Odontology, Umeå University | Umeå | Sweden |
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| ID | Term |
|---|---|
| D002971 | Cleft Lip |
| ID | Term |
|---|---|
| D008047 | Lip Diseases |
| D009059 | Mouth Diseases |
| D009057 | Stomatognathic Diseases |
| D009056 | Mouth Abnormalities |
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| ID | Term |
|---|---|
| D057909 | Orthognathic Surgery |
| D019416 | Head Movements |
| D001732 | Bite Force |
| ID | Term |
|---|---|
| D013515 | Surgery, Oral |
| D003813 | Dentistry |
| D009068 | Movement |
| D009142 | Musculoskeletal Physiological Phenomena |
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|
|
| Preoperatively, postoperatively 8 weeks, 18 months |
| D018640 |
| Stomatognathic System Abnormalities |
| D000013 | Congenital Abnormalities |
| D009358 | Congenital, Hereditary, and Neonatal Diseases and Abnormalities |
| D055687 |
| Musculoskeletal and Neural Physiological Phenomena |
| D003766 | Dental Occlusion |