Cervical Vertebrae Anomalies In Patients With Different Skeletal Malocclusions

Objectives: This study aimed to Identify the cervical vertebra anomalies and the prevalence of those anomalies among skeletal class I,II and III malocclusions in a Chinese population.METHODS: A total of 400 patients who were seeking treatment at Affiliated Hospital of Stomatology of Guangxi Medical University,Department of Orthodontics from 2013 to 2017 were selected.According to the inclusion criteria,104 patients were included in this study and divided into three groups:skeletal class ? consisting of 38 subjects(male 8,female 30,mean age 24.39years);Skeletal class ?consisting of 34 subjects(male 12,female 22,mean age24.5 years)and skeletal class ? consisting of 32 subjects(male 20,female 12,mean age 23.97 years).Cervical vertebrae anomalies(CVAs)were divided into four groups:(1)fusion(Fus);(2)block fusion(Blo);(3)Occipitalization,(Occ);(4)Posterior arch deficiency(PAD).SPSS 22.0 was used to analyze and count the incidence of cervical vertebra abnormalities in patients with different skeletal malocclusion.RESULT:(1)The incidence of cervical vertebra abnormality was 21.1% in skeletal class I malocclusion,44.1% in skeletal class II malocclusion,and 53.1%in skeletal class III malocclusion.The incidence of Cervical vertebra abnormalities were statistically significant in the three groups.(2)The incidence of Occipitalization in patients with skeletal class I malocclusion was 2.63%,skeletal class II malocclusion 11.76%,skeletal class III malocclusion 21.87%.The incidence difference of Occipitalization between the three groups was statistically significant.There was no statistically significant difference in the incidence of fusion,block fusion and posterior arch defect between the three groups.Conclusions: 1.The incidence of cervical vertebra abnormalities in patients with different skeletal malocclusion is lowest in skeletal class I,followed by class II,and highest in skeletal class III.2.The incidence of Occipitalization was the highest in skeletal class III malocclusion patients,followed by skeletal class II and skeletal class I.