The Effect of Splint Usage in Laterognathic Cl III Orthognathic Surgery Patients

Study Overview
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Brief Summary
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It is crucial to maintain the anatomic condylar positions during orthognathic surgery. Condylar positions are affected directly under general anesthesia because of joint and muscle relaxation. Possible unwanted changes in the joint position may cause incorrect positioning of the jawbones. This could affect the success of the surgery in terms of function and facial aesthetics causing the need for a second surgery. Our aim is to evaluate whether the use of MR Splint has a statistically significant effect on muscle relaxation-induced condyle position deviations under general anesthesia in Class III Laterognathia patients.

Detailed Description
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It is crucial to maintain the anatomic condyle positions during orthognathic surgery to prevent iatrogenic temporomandibular joint complications. Condyle shunts are affected directly under general anesthesia because of the joint and muscle relaxation. Surgical guidance appliances are prepared according to the TMJ records taken chairside while patients are in an upright position. During surgery, these appliances are applied in a supine position while the muscles are relaxed. Postoperative and long-term effects of TMJ and muscle relaxation obtained under general anesthesia in class III and asymmetric patients will be examined. Patients who had occlusal splint before records taken will be evaluated in terms of condyle location by MPI. Our aim is to evaluate whether the use of MR Splint has a statistically significant effect on muscle relaxation-induced condyle position deviations under general anesthesia in Class III Laterognathia patients.

Official Title
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The Effect of Splint Usage in Laterognathic Cl III Orthognathic Surgery Patients: Controlled Clinical Trial

Conditions
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Skeletal Malocclusion, Class III Malocclusion, Laterognathia

Intervention / Treatment
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* Device: Oclusal Splint


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: being ready for orthognathic surgery must be able to give centric relation records Exclusion Criteria: having any TMDsyndromes cleft lip and palate, have bruxism, TMJ or muscle disfunctions, under any medication of muscle relaxants, narcotics and antidepressants, usage of removeable prosthetics have toothless areas that can affect the wax impression for centric record used horizontal elastics within the last 2 months

Ages Eligible for Study
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Minimum Age: 18 Years

Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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No

Study Plan
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How is the study designed?
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Design Details

Primary Purpose: Prevention
Allocation: Randomized
Intervention Model: Parallel Assignment
Interventional Model Description: Preoperative occlusal splint treatment Cl III Laterognathia patients
Masking: Single


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Experimental: Occlusal stabilization splint<br>Skeletal class III laterognathia surgery patients who has occlusal stabilization splint thearapy for at least 2 mounths before surgery | Device: Oclusal Splint<br>* Cl III Laterognati volunteer group using occlusal stabilization splint before orthognathic surgery -Splint will be used for at least two months<br>|
| No Intervention: Control<br>Skeletal class III laterognathia surgery patients did not have occlusal stabilization splint thearapy | |

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| MPI Records for Splint Users | Difference between preoperative and intraoperative condylar positions will be observed as mm with bite records. MPI will be used in the lab to determine the difference. | 12 months |