A cone-beam CT-based study of maxillary and zygomatic bone morphology in children with different sagittal face types
Objective To investigate the differences in maxillary and zygomatic bone width and protuberance in children with different sagittal facet deformities by cone beam CT(CBCT),and to analyze the correlation between maxilla and zygomatic bone,as well as the significance of maxillary and zygomatic bone morphology for facial aesthetics.Methods We retrospectively analyzed the relevant imaging indexes of the zygomatic bone and maxilla in 135 children with malocclusion who underwent CBCT and lateral cephalometric films,including the nasozygomatic angle(fmo-n-fmo),zygomaticomandibular angle(zm-ss-zm),facial width(Za-Za),zygomatic point-auricular point(mp-po),zygomatico-mandibular suture point-papillary point(zm-ms),basal bone width and protuberance in the first molar region of the maxilla,first and second premolar region,and the maxillary bone width,and the maxillary bone shape for facial aesthetics.and second premolar regions,basal bone width and alveolar bone width(MBW,MAW,PBW,PAW,SPBW,SPAW),anterior intermandibular distance(AIMD),posterior zygomatico-intermandibular distance(PIZD),and posterior intertemporal distance(PITD),in order to compare the differences in CBCT imaging parameters between patients with bony Ⅰ,Ⅱ,and Ⅲ sagittal facial features,and the correlation between zygomatic bones and the maxilla,and analyze the significance of the central bone development for the shape of the face.We also analyzed the significance of the development of the middle bone for facial morphology.Results(1)MBW was significantly smaller than bone class Ⅲ in bone class Ⅰ and Ⅱ(P＜0.05),and MAW,SPBW,SPAW,PBW,and PAW did not show statistically significant differences among the three groups(P＞0.05);(2)Za-Za,AIMD,PIZD,and PITD were significantly smaller than bone class Ⅰ and Ⅱ in bone class Ⅲ(P＜0.05);(3)zm-ss-zm,mp-po and zm-ms were significantly smaller than bone class Ⅰ and Ⅱ in bone class Ⅲ(P＜0.05),and fmo-n-fmo had no statistically significant difference among the three groups(P＞0.05);(4)Za-Za,PIZD and PITD showed a significant positive correlation with MBW,MAW,SPBW,SPAW,PBW,PAW relationship(P＜0.05);(5)zm-ss-zm was positively correlated with fmo-n-fmo(P＜0.01)and zm-ms was positively correlated with mp-po(P＜0.01).Conclusions The maxillary base bone and zygomatic bone in the horizontal and sagittal directions in patients with osseous category Ⅲ had less growth than those with osseous categories Ⅰ and Ⅱ,and the face was more flat or even depressed;there was a correlation between the width and protuberance of the maxilla and the zygomatic bone.
万方数据
维普
