Ibrahim, Sara and Cheong, Joo Ming and Md Dasor, Maryati and Ahmad Alwi, Akmal Azim and Mohd Ibrahim, Mohamad Shafiq
(2024)
Nasal profile differences between skeletal Class II and Class III in Malay females.
In: IIUM Research & Innovation Day 2024, 2 July 2024, Grand hall, Office of Campus Director, IIUM Kuantan.
Abstract
PURPOSE: To compare the nasal profile differences between skeletal Class II and Class III Malay females.
METHODS: 30 pre-treatment lateral cephalograms of skeletal Class II and Class III female patients, aged 20-30 years old, were retrieved from IIUM Postgraduate Orthodontics Clinic. After calibration, the cephalograms were manually hand traced using a 0.05mm lead pencil on an acetate sheet on a light viewing box in a dark room. Five nasal parameters (nasomental, nasofrontal, nasofacial, nasolabial, and nasal bone angle) were measured using a protractor and metal ruler. The measurements were repeated after two weeks for intra-examiner reliability with intraclass correlation coefficient (ICC). Independent t-test was used to measure the differences between the groups.
RESULTS: The study found that the nasofrontal, nasofacial and nasolabial angles were significantly more obtuse in the skeletal Class II group (139.63±5.44º; 32.17±3.25º; 94.03±12.07º) compared to the skeletal Class III group (136.40±6.91º; 28.47±3.31º; 82.60±13.32º), with mean differences of 3.23º (p=0.049), 3.70º (p<0.001) and 11.43 º (p<0.001) respectively. Additionally, the nasomental angle was found to be larger in the skeletal Class III group (140.07±4.26º) as compared to the skeletal Class II group (129.83±5.59º), with a mean difference of 10.23º (p<0.001). However, no significant differences were found in the nasal bone angles between the groups.
CONCLUSION: The nose of skeletal Class II patients appears longer and more projected from the face as compared to skeletal Class III patients.
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