A New Approach to Set the Absolute Midsagittal Plane of the Mandible Using a Similarity Index in Skeletal Class III Patients with Facial Asymmetry
| Autor: | Kee Joon Lee, Yun-Hoa Jung, Woo-Jin Han, Bong-Hae Cho, Hyung Seog Yu, Sung Hwan Choi, Jae Joon Hwang |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
medicine.medical_treatment
Orthognathic surgery similarity index mental foramen lcsh:Technology Plane (Unicode) lcsh:Chemistry Mental foramen 03 medical and health sciences 0302 clinical medicine Similarity (network science) medicine General Materials Science computer algorithm lcsh:QH301-705.5 Instrumentation Mathematics Fluid Flow and Transfer Processes Orthodontics lcsh:T Process Chemistry and Technology General Engineering Mandible 030206 dentistry Skeletal class lcsh:QC1-999 Sagittal plane computed modified absolute mandibular midsagittal plane Computer Science Applications medicine.anatomical_structure lcsh:Biology (General) lcsh:QD1-999 lcsh:TA1-2040 030220 oncology & carcinogenesis facial asymmetry lcsh:Engineering (General). Civil engineering (General) lcsh:Physics Facial symmetry |
| Zdroj: | Applied Sciences Volume 10 Issue 23 Applied Sciences, Vol 10, Iss 8550, p 8550 (2020) |
| ISSN: | 2076-3417 |
| DOI: | 10.3390/app10238550 |
| Popis: | This study sought to test the feasibility of a newly developed plane called computed modified absolute mandibular midsagittal plane (cmAMP) based on the similarity index (SI) for evaluating the stereoscopical symmetry of the mandible by comparison with other proposed midsagittal planes. This study involved 29 adult patients (15 men, 14 women average age, 23.1 ± 6.9 years) with skeletal Class III facial asymmetry who underwent bimaxillary orthognathic surgery. Using cone-beam computed tomography images taken before and 1 year after surgery, cmAMP with the highest SI value between the two anterior segments of the hemi-mandible was set by a computer algorithm. Results show that the SI using cmAMP had the highest value (0.83 ± 0.04) before surgery compared to the other midsagittal planes, and was not significantly different from the SI (0.80 ± 0.05) using a facial midsagittal plane (MSP) after surgery. The distance (1.15 ± 0.74 mm) and angle (2.02 ± 0.82° ) between MSP and cmAMP after surgery were significantly smaller than those between MSP and other midsagittal planes. In conclusion, the cmAMP plane best matches the two anterior segments of hemi-mandible symmetrically and is the closest to MSP after orthognathic surgery in skeletal Class III patients with facial asymmetry. |
| Databáze: | OpenAIRE |
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