Mandibular asymmetry in patients with skeletal class I and skeletal class II Malocclusions: A cone-beam computed tomography study. 2023

Yu Wang, and Yan Wang, and Chunhui Wang, and Yuming Cao, and Bing Zhang, and Yitian Chen, and Chang Liu
Department of Orthodontics, Stomatology Hospital of Guangzhou Medical University, 59th Huangsha Road, Guangzhou, Guangdong 510120, China.

OBJECTIVE To study the difference in mandibular asymmetry between patients with skeletal Class I and skeletal Class II malocclusions and analyze the correlation between mandibular asymmetry and different facial skeletal sagittal patterns based on CBCT measurements. METHODS One hundred and twenty patients were selected according to the inclusion and exclusion criteria. Patients were divided into two groups (60 in the skeletal Class I group and 60 in the skeletal Class II group) based on ANB angles and Wits values. Patients' CBCT data were collected. Dolphin Imaging 11.0 was used to determine the mandibular anatomic landmarks and calculate the linear distance in patients in the two groups. RESULTS Intragroup comparison: in skeletal Class I group, measurements of the most posterior point of the condyle (Cdpost), the outer lateral point of the condyle (Cdlat), sigmoid notch point (Sn)), coronoid process point (Cop), gonion point (GO) and antimony notch point (Ag), right>left (P<0.05); in skeletal Class II group, measurements of Cdpost and Cop, right>left (P<0.05). Intergroup comparison: for measurements of GO and Ag, skeletal Class I group>skeletal Class II group (P<0.05). The asymmetry of the Ag and GO points was negatively correlated with the ANB angle (p<0.05). CONCLUSIONS Mandibular asymmetry was significantly different between patients with skeletal Class I and skeletal Class II malocclusions. The asymmetry of the mandible angle region in the former group was greater than that in the latter group, and the asymmetry of the mandibular angle was negatively correlated with the ANB angle.

UI MeSH Term Description Entries
D008312 Malocclusion, Angle Class II Malocclusion in which the mandible is posterior to the maxilla as reflected by the relationship of the first permanent molar (distoclusion). Angle Class II,Angle Class II, Division 1,Angle Class II, Division 2,Class II Malocclusion, Division 1,Class II Malocclusion, Division 2,Malocclusion, Angle Class II, Division 1,Malocclusion, Angle Class II, Division 2,Class II, Angle
D008334 Mandible The largest and strongest bone of the FACE constituting the lower jaw. It supports the lower teeth. Mylohyoid Groove,Mylohyoid Ridge,Groove, Mylohyoid,Grooves, Mylohyoid,Mandibles,Mylohyoid Grooves,Mylohyoid Ridges,Ridge, Mylohyoid,Ridges, Mylohyoid
D006801 Humans Members of the species Homo sapiens. Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D054893 Cone-Beam Computed Tomography Computed tomography modalities which use a cone or pyramid-shaped beam of radiation. CAT Scan, Cone-Beam,Cone-Beam CT,Tomography, Cone-Beam Computed,Tomography, Volume Computed,CT Scan, Cone-Beam,Cone-Beam Computer-Assisted Tomography,Cone-Beam Computerized Tomography,Volume CT,Volume Computed Tomography,Volumetric CT,Volumetric Computed Tomography,CAT Scan, Cone Beam,CAT Scans, Cone-Beam,CT Scan, Cone Beam,CT Scans, Cone-Beam,CT, Cone-Beam,CT, Volume,CT, Volumetric,Computed Tomography, Cone-Beam,Computed Tomography, Volume,Computed Tomography, Volumetric,Computer-Assisted Tomography, Cone-Beam,Computerized Tomography, Cone-Beam,Cone Beam CT,Cone Beam Computed Tomography,Cone Beam Computer Assisted Tomography,Cone Beam Computerized Tomography,Cone-Beam CAT Scan,Cone-Beam CAT Scans,Cone-Beam CT Scan,Cone-Beam CT Scans,Scan, Cone-Beam CAT,Scan, Cone-Beam CT,Scans, Cone-Beam CAT,Scans, Cone-Beam CT,Tomography, Cone Beam Computed,Tomography, Cone-Beam Computer-Assisted,Tomography, Cone-Beam Computerized,Tomography, Volumetric Computed
D059925 Anatomic Landmarks Reference points located by visual inspection, palpation, or computer assistance, that are useful in localizing structures on or within the human body. Anatomic Landmark,Landmark, Anatomic,Landmarks, Anatomic
D021621 Imaging, Three-Dimensional The process of generating three-dimensional images by electronic, photographic, or other methods. For example, three-dimensional images can be generated by assembling multiple tomographic images with the aid of a computer, while photographic 3-D images (HOLOGRAPHY) can be made by exposing film to the interference pattern created when two laser light sources shine on an object. Computer-Assisted Three-Dimensional Imaging,Imaging, Three-Dimensional, Computer Assisted,3-D Image,3-D Imaging,Computer-Generated 3D Imaging,Three-Dimensional Image,Three-Dimensional Imaging, Computer Generated,3 D Image,3 D Imaging,3-D Images,3-D Imagings,3D Imaging, Computer-Generated,3D Imagings, Computer-Generated,Computer Assisted Three Dimensional Imaging,Computer Generated 3D Imaging,Computer-Assisted Three-Dimensional Imagings,Computer-Generated 3D Imagings,Image, 3-D,Image, Three-Dimensional,Images, 3-D,Images, Three-Dimensional,Imaging, 3-D,Imaging, Computer-Assisted Three-Dimensional,Imaging, Computer-Generated 3D,Imaging, Three Dimensional,Imagings, 3-D,Imagings, Computer-Assisted Three-Dimensional,Imagings, Computer-Generated 3D,Imagings, Three-Dimensional,Three Dimensional Image,Three Dimensional Imaging, Computer Generated,Three-Dimensional Images,Three-Dimensional Imaging,Three-Dimensional Imaging, Computer-Assisted,Three-Dimensional Imagings,Three-Dimensional Imagings, Computer-Assisted

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