Result of Malocclusion Pattern in Patients of Orthodontic Department in Dental Central Hospital, MNUMS

Abstract

Introduction: There are many studiesdone about prevalence of malocclusion in many countries but there are few studies about malocclusion pattern in orthodontic patients.In Dental Central Hospital of Mongolian National University of Medical Science (MNUMS), orthodontic treatment has been offered since 2011. Since then there haven’t been any studies about the numberof patients, common malocclusion pattern, and treatment types used in orthodontic department. Our purpose was to identify skeletal and dental malocclusion in patients who received treatment during 20112020 at orthodontic department of Dental Central Hospital. In this study,we included orthodontically referred patient without any age barrierand our study design was descriptive.We used patients’ sheets, photos, dental models, and polygons. Result:At the Department of Orthodontics of Dental Central Hospital 2186 patients received treatmentduring 2011-2020 with the mean age of11.45±6.16.Out of these observations, 40.4% (886) were male, while 59.6%(1300) were female. Most patients visited theOrthodontic department in 2017 and 2018 which were545 patients (27.1%) in 2017,531 patients(26.4%)in 2018.Patients` mean overbite was 1.86 mm and the overjet was 2.1 mm. When we evaluated occlusiondental Class Imalocclusion was 51.1%,dental Class II malocclusion was 27.5%, dental Class III malocclusionwas 20.7%. Meanwhile skeletal Class Imalocclusion was 35.1%, skeletal Class IImalocclusion was 19.3%, skeletal ClassIII malocclusion was 45.59%.Mean SNA was 79.480,mean SNB was 75.160 and mean was ANB-1.670. Mean maxillary ALD was -4.34 mm, mean ALD in mandible was -0.77 mm respectively. SNA-79.480, SNB-75.160, ANB-1.670. There are 33 types of appliances used for treatment in orthodontic department and 40.1% was removable appliance. Conclusion: Considering the fact that younger groups seek the most treatment, the use of removable appliance are more frequently used. As years pass by, number of patients seeking treatment and types of orthodontic appliances used are increasing.