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PREVALENCE OF DENTAL ANOMALIES AMONG ORTHODONTIC PATIENTS IN SOUTH-EAST
SABAH
NMRR-19-1143-47950

Lee JH

Objective: This study evaluated the prevalence of dental anomalies among orthodontic
patients at a referral centre in South-East Sabah. Materials and Methods: A total of 155
pre-treatment orthodontic records of patients who attended the orthodontic consultation
clinic from September 2017 to October 2019 were included in this cross-sectional study.
Data taken were demographic data (age, gender, and ethnic groups), and types of dental
anomalies. All data were analysed descriptively. The differences between females and
males and ethnic groups with respect of the dental anomalies were tested using Fisher’s
Exact test. The level of significance was set at 5% (P < 0.05). Results: The mean age of the
patients was 16.17 ± 0.23 years. More than three-quarters of the patients were females (n
= 117, 75.48%). Most of the patients were Chinese (n = 75, 48.39%) followed by Bumiputera
Sabah (n = 54, 34.84%). More than one-third of the patients presented with at least one
dental anomaly (n = 53, 34.19%). The most common dental anomalies were supernumerary
(n = 16, 10.32%), hypodontia (n = 14, 9.03%), and impacted maxillary canine (n = 12, 7.74%).
The prevalence of dental anomalies was higher in males (n = 15, 39.47%) than females (n =
38, 32.48%). Supernumerary was more common in males (n = 7, 18.42%) and hypodontia
in females (n = 12, 10.26%). Conclusions: The prevalence of dental anomalies among
orthodontic patients at a referral centre in South-East Sabah was 34.19%. The most
common dental anomalies were supernumerary, hypodontia, and impacted maxillary
canine. Supernumerary was more common in males and hypodontia in females.

Published in Malaysian Dental Journal. 2020, Vol. 2: Page 84-95.

Dr Lee Jin Han
Ortodontic Specialist Clinic
Queen Elizabeth II Hospital
Kota Kinabalu Sabah

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