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Article
Angle’s classification and hypodontia, is there an association?

Authors: Afrah Kh Al–Hamdany --- Ne’am R Al–Saleem --- Aisha A Qasim
Journal: Al-Rafidain Dental Journal مجلة الرافدين لطب الأسنان ISSN: 18121217 Year: 2007 Volume: 7 Issue: 1 Pages: 1-5
Publisher: Mosul University جامعة الموصل

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Abstract

Aims: To find the association between different Angle’s classes of malocclusion and to estimate the distribution of hypodontia according to gender, number of missing teeth and the site of the missing teeth. In addition, the heredity role in hypodontia was investigated. Materials and Methods: About 3415 subjects, 1750 females and 1665 males aging between 18–30 years were examined clinically in addition periapical radiographs were taken for each patient to exclude a possibility of impaction. A family history of hypodontia for each patient was taken (for father, mother, brothers and sisters). Then the sample was divided into 3 groups depending on Angle’s classification of malocclusion. Results: No clear association was found between Angle's classes and hypodontia, females showed higher prevalence of hypodontia than males. Family history was obvious in patients with hypodontia. The upper lateral incisor was the most frequent absent tooth. Conclusions: No association was found between Angle’s classification and hypodontia. The upper lateral incisor was the most frequent missing tooth. Maxilla was affected by hypodontia more than mandible. Females were affected more than males with very obvious effect of family history on hypodontia.


Article
Pattern of Malocclusion in Iraqi Patients Seeking Orthodontic Treatment

Journal: MUSTANSIRIA DENTAL JOURNAL مجلة المستنصرية لطب الاسنان ISSN: 18138500 Year: 2018 Volume: 15 Issue: 1 Pages: 41-48
Publisher: Al-Mustansyriah University الجامعة المستنصرية

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Abstract

Background: Malocclusion problems and orthodontic treatment demand is increasingover recent years. In most of the patients, malocclusion carry significantpsychological stigma to them and may cause many serious dental esthetic andfunctional problems. Thus, it is mandatory to assess the epidemiological figureson the pattern of malocclusion to plan and determine the resources needed forplanning the appropriate orthodontic treatment. This study aimed to assess thepattern and distribution of malocclusion based on Angle’s classification systemamong Iraqi orthodontic patients.Materials and methods: This study included 474 patients (230 males, 244 females)between the age 13 to 20 years attending the undergraduate Department ofOrthodontics at Al-Rafidain University College. Occlusal variables examinedwere molar relationship, crowding, spacing, buccally displaced canines, deep bite,open bite, anterior crossbite, and posterior crossbite. A descriptive statistics wasused to analyze the data and the relationship was studied utilizing “Chi square test(p<0.05) and Fisher’s exact probability test”.Results: The frequency of “Angle class I, II and III malocclusion” of first molars was89.66%, 8.22%, and 2.1% respectively. However, no significant differences werefound between the sexes in the prevalence of different types of malocclusionexcept for Class III malocclusion. The percentages of other occlusal traits werecrowding 72.23%, spacing 9.88%, deep bite 0.6%, open bite 0.6%, buccallydisplaced canines 6.82%, anterior crossbite 4%, and posterior crossbite wasreported in 3.06%.Conclusion: The Angle’s Class I malocclusion with crowding was the most prevalent,followed by Class II malocclusion while the least predominant was Class IIImalocclusion.

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