OBJECTIVE: This study aims to determine the mean collum angle of maxillary central incisor and to compare it between high angle and low angle patients undergoing orthodontic treatment. METHODOLOGY: This cross-sectional, observational study was conducted using lateral cephalometric radiographs of 61 class II division 1 patients (comprised 32 males, 29 females, age range 13 to 30 years) from the record files of patients inducted for Orthodontic management from June 2020 till August 2020 at the Department of Orthodontics, Sindh Institute of Oral Health Science, Jinnah Sindh Medical University, Karachi, Pakistan. The sample was divided on the basis of Vertical Analysis (angulation of mandibular plane) into high and low angle cases. Collum angle was measured using the angulation of the Maxillary Central Incisor (MCI). Student t-test was used to compare the mean difference of the collum angle between skeletal vertical malocclusions. RESULTS: Mean value of the collum angle for high angle (Vertical Growth pattern) cases were mean ± standard deviation (4.35°±1.49°) while for low angle groups (Horizontal Growth pattern) were (2.41°±1.60°). CONCLUSION: There Collum angle of permanent maxillary central incisors differ significantly (p<0.001) among high angle and Low angle malocclusions cases (n=61) and showed pronounced axial bending in Class II division 1 incisors with high angle (4.35° ± 1.49°) as compared to low angle malocclusion (2.41° ± 1.60°). KEYWORDS: Collum Angle, Maxillary Central Incisor, Orthodontic Treatment, High Angle, Low Angle.
Objective: To determine the awareness of regular orthodontic follow-up visits among the patients. The secondary objective was to assess patients’ perception towards orthodontic treatment needs and their psychological status during lockdown. Study Design and Setting: This cross-sectional study was conducted at Sindh Institute of Oral Health Sciences, (JSMU) from August, 2020 to January, 2021. Methodology: The questionnaire contained 15 questions divided into 3 categories. First category was about the awareness of routine checkup among patients Q1-Q5, second was to assess the impact of lockdown on patients’ visit to orthodontist Q6-Q12 and third was to assess the psycho-social effect of lockdown Q13-Q15. Three point likert scale was applied on each question with cut off value set as 70% for the 3 categories to get positive/negative response. SPSS version 22 was used for data entry and analyzing. Percentages and frequencies were calculated for qualitative variables like age, gender and educational level. Chi-square test was applied on all the three categories keeping the p-value <0.05 as significant. Results: The study included 115 subjects comprising of 21(18.3%) males and 94(81.7%) females, aged 12-30 years with mean age 19.15±3.96. Out of 115 patients 47(40.9%) patients met the 70 % cut off criteria for category 1.Similarly, for category 2, 73(63.5%) patients met the 70% cut off value. For category 3, 7(6.1%) patients met the 70% cut off value. Statistically significant difference was found for category 1 with age, gender and educational level at p-value<0.05. Similarly, in category 3, only educational level showed statistically significant association. Conclusion: The patients were quite aware of the need to visit orthodontists for regular follow ups during their treatment. The psychological status of the patients was the prime concern of the orthodontists as they had not sought orthodontic help during this time.
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