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The Chinese Journal of Dental Research

Year 2003
Volume 6 , Issue 4

Pages: 49 - 53

Dentoskeletal Characteristics of Pseudo Class III Malocclusion in Mixed Dentition

Yan Guy

Objective: To find the dentoskeletal characteristics of pseudo class III malocclusion in mixed dentition. Materials and Methods: Thirty-six patients (15 females, 21 males with mean age 10.7 2.0 years) were included in the pseudo class III malocclusion group. Forty patients 921 females, 19 males with mean age 9.7 2.2 years) with class III incisor relationship and class III molar relationship were included in the skeletal class III malocclusion group. All the subjects were followed up after growth spurt and were diagnosed either as pseudo class III malocclusion or skeletal class III malocclusion. Thirty-one patients with class I malocclusion were included in the class I malocclusion group. Selection criteria included: skeletal class I malocclusion with normal overjet and overbite; mild to moderate crowding with class I molar relationship; straight facial profile. Cephalograms were taken in the mixed dentition for pseudo class III malocclusion, skeletal class III malocclusion and class I malocclusion groups to compare dentoskeletal characteristics. Results: Females in the pseudo class III malocclusion group showed more retrusion of A point with an average value of -1.63 mm compared with 0.52 mm in the class I malocclusion group (p<0.05). The upper incisors in the pseudo class III malocclusion group were upright. Conclusion: Pseudo class III malocclusion is characterized by decreased midface length, mandibular displacement, retroclined upper incisors and normalized vertical development.



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