Pattern of Distribution of Malocclusion among Patients Seeking Orthodontic Treatment at Dental College - Nepal Medical College

Anshu Piya, V BShrestha, J Acharya, Sanskriti Khanal, P Bhattarai


Background: Malocclusion can cause dental caries, periodontal diseases, esthetic and functional problems. This may also lead to temporomandibular disorder. The demand of orthodontic treatment is increasing. Therefore, it is essential to assess the epidemiological data on the pattern of malocclusion so that it can aid in determining the resources for plan ning the appropriate treatment. This also provides the baseline data for planning further orthodontic treatment.

Objective: To determine the prevalence of individual traits of malocclusion based on Angle’s classification of molar relationship and to provide quantitative information regarding the pattern of dentofacial characteristics in orthodontic patients attending dental hospital in Nepal Medical College, along with the gender differences if any.

Materials and Method: A cross-sectional study was done among 131 patients (78 females, 53 males). Angle’s classification was used to assess the molar relationship. Chief complaints, crowding, spacing, overjet, overbite, crossbite, scissorbite, openbite, dental anomalies and supernumerary tooth were recorded. All data were collected from the records and dental casts of orthodontic patients. Association was analyzed using Chi square test (p<0.05).

Results: This study demonstrated that Angle’s Class I malocclusion was seen to be most prevalent (59.5%). Class II malocclusion was seen in 26.7% of the patients and class III was seen in 13.7%. Upper and lower arch spacing was seen to be more prevalent in Class I malocclusion. However, this was not statistically significant.

Conclusion: There are certain drawbacks of Angle’s classification of malocclusion as this classification only reveals the malocclusion in antero posterior planes not transverse and vertical planes. Further researches involving skeletal analysis are recommended.


Angle’s classification, malocclusion, prevalence

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