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General anesthesia in orthognathic surgeries: does it affect horizontal jaw relations?
Masoud Yaghmaei1, Masoud Ejlali, Sekieneh Nikzad
1Professor, Department of Oral and Maxillofacial Surgery, Dental Research Center, Faculty of Dentistry, Shahid Beheshti University of Medical Sciences, Tehran, Iran.
Summary
General anesthesia may alter jaw relation records in orthognathic surgery patients, especially those with Angle Class II malocclusion. Surgeons should consider these changes to prevent complications.
Area of Science:
- Dental Surgery
- Orthognathic Surgery
- Anesthesiology
Background:
- Accurate centric jaw relation (CR) records are crucial for orthognathic surgery planning.
- The influence of general anesthesia on CR records in different patient positions is not fully understood.
Purpose of the Study:
- To evaluate the impact of general anesthesia on centric jaw relation (CR) records in orthognathic surgical patients across various postural positions.
Main Methods:
- 50 orthognathic surgery patients had CR records taken pre-operatively (conscious, upright/supine) and intra-operatively (supine, under general anesthesia).
- Differences in CR records were measured using calipers and analyzed with paired t-tests and regression models.
Main Results:
- Statistically significant differences in CR records were observed across all Angle classification groups, though changes were generally under 2 mm.
- Angle Class II patients showed a significant difference in CR records under general anesthesia compared to conscious states (P = .001).
- General anesthesia significantly impacted CR records, particularly in Angle Class II malocclusions.
Conclusions:
- General anesthesia may not significantly affect mandibular condylar position in supine orthognathic patients compared to conscious supine positioning.
- Angle Class II patients exhibited more significant CR record changes under general anesthesia.
- Oral and maxillofacial surgeons must be aware of anesthesia-induced CR record alterations to avoid mismanagement and potential complications.
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