Maxillary Central Incisors’ collum angle in different skeletal vertical malocclusions – A Cephaometric study
Gomaa, N., Elmarhoumy, S., Fakhry, N. (2019). Maxillary Central Incisors’ collum angle in different skeletal vertical malocclusions – A Cephaometric study. EKB Journal Management System, 65(Issue 1 - January (Orthodontics, Pediatric & Preventive Dentistry)), 1-7. doi: 10.21608/edj.2019.71240
Nahla Gomaa; Shaimaa Elmarhoumy; Neveen Fakhry. "Maxillary Central Incisors’ collum angle in different skeletal vertical malocclusions – A Cephaometric study". EKB Journal Management System, 65, Issue 1 - January (Orthodontics, Pediatric & Preventive Dentistry), 2019, 1-7. doi: 10.21608/edj.2019.71240
Gomaa, N., Elmarhoumy, S., Fakhry, N. (2019). 'Maxillary Central Incisors’ collum angle in different skeletal vertical malocclusions – A Cephaometric study', EKB Journal Management System, 65(Issue 1 - January (Orthodontics, Pediatric & Preventive Dentistry)), pp. 1-7. doi: 10.21608/edj.2019.71240
Gomaa, N., Elmarhoumy, S., Fakhry, N. Maxillary Central Incisors’ collum angle in different skeletal vertical malocclusions – A Cephaometric study. EKB Journal Management System, 2019; 65(Issue 1 - January (Orthodontics, Pediatric & Preventive Dentistry)): 1-7. doi: 10.21608/edj.2019.71240

Maxillary Central Incisors’ collum angle in different skeletal vertical malocclusions – A Cephaometric study

Egyptian Dental Journal
Article 2, Volume 65, Issue 1 - January (Orthodontics, Pediatric & Preventive Dentistry), January 2019, Page 1-7  XML PDF (1.29 MB)
Document Type: Original Article
DOI: 10.21608/edj.2019.71240
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Authors
Nahla Gomaa1; Shaimaa Elmarhoumy2; Neveen Fakhry2
1Assisstant Professor of Orthodontics, Faculty of Dentistry, Tanta University, Egypt.
2Lecturer of Orthodontics, Faculty of Dentistry, Tanta University, Egypt
Abstract
Introduction: The Collum angle can be defined as a crown root supplementary angle of maxillary central incisors. The aim of the study was to assess the maxillary central incisors’ collum angle in a sample of Egyptian patients with different vertical malocclusions using cephalometric radiographs.
Methods: Ninety lateral cephalometric radiographs were collected and divided into three groups, with equal size, according to lateral cephalograms (SN-GoGn angle). Group І: consisted of lateral cephalmetric radiographs of 30 who had the strongest predominance of horizontal growth pattern (SN-GoGn ≤28º), Group ІІ: consisted of lateral cephalmetric radiographs of 30 subjects who had the strongest predominance of vertical growth pattern (SN-GoGn ≥35º). Angular and linear parameters on cephalometric radiograph for each subject were measured to identify the facial growth patterns, and Collum angle was then measured.
Results: mean of collum angle for the maxillary central incisor in horizontal growth pattern sample was 7.8°±2.2° with minimum being 5° and max­imum 14°. The mean values for vertical growth pattern was 2.1°±2.1° with minimum 0° and a maximum 6°. Paired samples t-test comparison revealed that there was a high significant increase in maxillary central incisor collum angle in horizontal growers than in vertical growers, mean difference being 5.7°±1°.
Conclusion: Maxillary central incisor collum angle in horizontal growers is higher than in vertical growers.
Keywords
collum angle; horizontal growth pattern; vertical growth pattern
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