1* Senior Demonstrator, Orthodontics, Azra Naheed Dental College, Superior University. Email: aisha.bano@superior.edu.pk (Corresponding Author)
2 Senior Registrar, Orthodontics, Jalawan Medical College, Khuzdar. Email: pakowaja@gmail.com
3 Associate Professor, Orthodontics, Azra Naheed Dental College, Superior University. Email: munawar.manzoor@superior.edu.pk
4 Senior Registrar, Orthodontics, Azra Naheed Dental College, Superior University. Email: aaisha.akbar@superior.edu.pk
5 Senior Demonstrator, Orthodontic Department, Azra Naheed Dental College, Superior University. Email: drnomantariq1989@gmail.com
6 House Officer, Azra Naheed Dental College, Superior University. Email: laraibtahir814@gmail.com
Introduction: The collum angle is an angular measurement between the root and coronal axes of maxillary central incisors. The angle is very important to orthodontics because it can affect root positioning and torquing. Abnormal values can affect sagittal skeletal differences.
Objective: This study aimed to evaluate the relationship between the collum angle of the maxillary central incisors and skeletal sagittal differences among orthodontic patients in pakistan.
Methods: The study design is a cross-sectional one, which shall take place at azra naheed dental college, lahore, within a 12 months' duration (january 2025 to december 2025) after seeking institutional review board (irb) permission (irb-ref-no: idh/irb/2023/07). A total of 29 subjects will participate in this research, aged 18-30 years, with complete oral dentition and no history of any orthodontic work. The measurement of collum angle and sagittal skeletal patterns (anb, anb₂, and anb₃) on lateral cephalograms will also be performed. The subjects shall denote specific values concerning:
Results: Subjects can be classified into 3 categories. The mean value of the collum angle was 7.12° ± 3.05°. The collum angle values were significantly higher in group ii (8.76°) than in group i (6.45°) and group iii (5.12°). The strength of association between the collum angle and anb₂ was very strong (r = 0.613, p < 0.001), and that between the collum angle and anb₃ was moderately large and borderline non-significant (r = -0.346, p = 0.066). The difference between group ii and groups i and iii was significant (p = 0.018 and 0.007, respectively).
Conclusion: The maxillary central incisor collum angle was significantly larger in class ii skeletal sagittal relationships and positively correlated with anb₂. A personalized assessment of the tooth angle could be important during orthodontic diagnosis and treatment.
Keywords: Collum Angle, Maxillary Central Incisor, Skeletal Sagittal Discrepancy, Cephalometric Analysis, Orthodontics.
How To Cite This Article: Bano A, Nizam F, Ali Mm, Akbar A, Tariq N, Tahir L. Correlation Between Maxillary Incisors' Collum Angle And Skeletal Sagittal Discrepancies: A Radiographic Analysis. Int J Drug Deliv Technol. 2026;16(21s):658. Doi: 10.25258/ijddt.16.21s.68