Mohamad Saleh Khaghaninejad1, Leila Khojastepour2, Hanie Ahmadi3, Saeid Tavanafar4, Alireza Ebrahimi3, Mohammad Mahjoori-Ghasrodashti5. 1. Department of Oral and Maxillofacial Surgery, School of Dentistry, Shiraz University of Medical Sciences, Ghasrodasht St, Shiraz, Iran. 2. Department of Oral and Maxillofacial Radiology, School of Dentistry, Shiraz University of Medical Sciences, Shiraz, Iran. 3. Student Research Committee, School of Dentistry, Shiraz University of Medical Sciences, Shiraz, Iran. 4. Department of Oral and Maxillofacial Surgery, School of Dentistry, Shiraz University of Medical Sciences, Ghasrodasht St, Shiraz, Iran. s.tavanafar@gmail.com. 5. Eastman Institute for Oral Health, Rochester, USA.
Abstract
BACKGROUND: This study aimed to determine how successful reconstruction of the mandible can recover the symmetry. MATERIALS AND METHODS: All patients who underwent surgical treatment for unilateral mandibular reconstruction in 4 years were retrospectively examined. Bilateral differences of gonion (GO) positions were measured in 3 dimensions based on immediate postoperative computed tomography. The data collected was analyzed in 3 ways: First, the comparison of bilateral differences of GO in 3 dimensions. Second, the mean Asymmetry Index in control subjects was used to divide all cases into three groups: "Symmetry," "Asymmetry," and "Marked asymmetry." Third, "maximum normal asymmetry" was calculated, and all cases were categorized as below and above maximum normal asymmetry. The difference between two gonial angles was used to determine the amount of asymmetry. RESULTS: Forty-seven patients and 47 normal adults were enrolled. The mean bilateral GO difference in the control group was higher than in the study group patients, but it was not statistically significant. The mean Asymmetry Index for the control group was not also significantly higher than the study cases. The study group was "Symmetric" in 78.7% of the cases whereas the control group in 91.4%, 19.1% of the study group and 8.5% of controls were "Asymmetric," and 2.1% of study cases and 0% of controls were "Markedly Asymmetric." Maximum normal asymmetry was 82.9% in the study group and 97.8% in the control group. The mean differences between the right and left gonial angles were higher in the study group, but it was not significant (P = 0.1). CONCLUSIONS: Our study's results showed that bilateral symmetry in mandibular reconstruction patients was satisfactory and similar to the normal individuals.
BACKGROUND: This study aimed to determine how successful reconstruction of the mandible can recover the symmetry. MATERIALS AND METHODS: All patients who underwent surgical treatment for unilateral mandibular reconstruction in 4 years were retrospectively examined. Bilateral differences of gonion (GO) positions were measured in 3 dimensions based on immediate postoperative computed tomography. The data collected was analyzed in 3 ways: First, the comparison of bilateral differences of GO in 3 dimensions. Second, the mean Asymmetry Index in control subjects was used to divide all cases into three groups: "Symmetry," "Asymmetry," and "Marked asymmetry." Third, "maximum normal asymmetry" was calculated, and all cases were categorized as below and above maximum normal asymmetry. The difference between two gonial angles was used to determine the amount of asymmetry. RESULTS: Forty-seven patients and 47 normal adults were enrolled. The mean bilateral GO difference in the control group was higher than in the study group patients, but it was not statistically significant. The mean Asymmetry Index for the control group was not also significantly higher than the study cases. The study group was "Symmetric" in 78.7% of the cases whereas the control group in 91.4%, 19.1% of the study group and 8.5% of controls were "Asymmetric," and 2.1% of study cases and 0% of controls were "Markedly Asymmetric." Maximum normal asymmetry was 82.9% in the study group and 97.8% in the control group. The mean differences between the right and left gonial angles were higher in the study group, but it was not significant (P = 0.1). CONCLUSIONS: Our study's results showed that bilateral symmetry in mandibular reconstruction patients was satisfactory and similar to the normal individuals.
Entities:
Keywords:
Facial asymmetry; Gonion point; Hard tissue; Mandibular reconstruction
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