Relativity For Dental Age, Cervical Vertebral Bone Age Of Unilateral Complete Cleft Lip And Palate, Non- Cleft Lip And Palate In Children And Adolescent

Objective: To investigate the relationship between the dental age,cervical vertebral bone age among Unilateral Complete Cleft Lip and Palate Patients(UCLP) and non- Cleft Lip and Palate Patients.In the mean time,provided a basis for orthodontic diagnosis and treatment with dental age of children and adolescents.Methods: Experiment1: Digital panoramic radiographs and lateral skull cephalograms of 215(102 boys and 113 girls) non-Cleft Lip and Palate Patients were examined.Dental maturity was assessed by Demirjian, s method, whereas cervical vertebral bone maturity was estimated by Baccetti, s method. The Spearman rank-order correlation coefficient was used to analyze the dental age and cervical certebral bone age. Experiment 2: Digital panoramic radiographs and lateral skull cephalograms of 123(71 boys and 52 girls) Unilateral Complete Cleft Lip and Palate Patients were examined.Dental maturity was assessed by Demirjian, s method, whereas cervical vertebral bone maturity was estimated by Baccetti, s method. The Spearman rank-order correlation coefficient was used to analyze the dental age and cervical certebral bone age.Results: Experiment 1:The dental age of the canine, first premolar, second premolar, and second molar was significantly correlated with cervical certebral bone age in non-Cleft Lip and Palate patients(r=0.762~0.864). The second molar was the tooth showing the highest correlation(boys r=0.864; girls r=0.815). Experiment 2:The dental age of the canine, first premolar, second premolar, and second molar was significantly correlated with cervical certebral bone age in UCLP patients(r=0.809~0.914). The first premolar has the highest correlation(boys r=0.846,0.861; girls r=0.905,0.914).Conclusions: 1、The dental age can be used clinically to estimate the skeletal maturity of non-Cleft Lip and Palate patients. When judged by the mandibular second molar,with stages(D、E),(F、G), and H of root formation of the lower second molar of both genders indicating, may respectively, the skeletal maturation stages before, during, and after peak growth. 2、The dental age can be used clinically to estimate the skeletal maturity of UCLP patients. When judged by the mandibular first premolar,with stages E,(F、G), and H of root formation of the lower first premolar of both genders indicating, may respectively, the skeletal maturation stages before, during, and after peak growth.