Different manifestations of class II division 2 incisor retroclination and their association with dental anomalies. (December 2013)

• Record Type: Journal Article
• Authors: Pereira, Pedro Mariano; Ferreira, Afonso Pinhão; Tavares, Purificação; Braga, Ana Cristina
• Is Part Of: Journal of orthodontics. Volume 40:Number 4(2013:Dec.)
• Page Start: 299
• Page End: 306
• Publication Date: 2013-12
• Subjects: Class II division 2 -- dental anomalies -- incisor retroclinacion -- impacted tooth -- agenesis -- microdontia; Orthodontics -- Periodicals; 617.643005
• DOI: 10.1179/1465313313Y.0000000067
• Languages: English
• ISSNs: 1465-3125

Abstract

Abstract : Objective : To investigate whether there is an association between dental developmental anomalies (DDAs) and different manifestations of class II division 2 (CII/2) malocclusion incisor retroclination. Design : Retrospective comparative study. Setting : Private orthodontic practice in the regions of Lisbon and Porto, Portugal. Subjects and methods : The sample comprised 115 CII/2 malocclusions distributed into two groups on the basis of incisor retroclination: Group I composed of 48 CII/2 with retroclination exclusively of both maxillary central incisors; Group II composed of 67 CII/2 with retroclination of all four maxillary incisors. Using the initial orthodontic records, it was determined for each patient the presence of the following DDAs: tooth impaction, tooth agenesis, maxillary lateral incisor microdontia, tooth transpositions and supernumerary teeth. Results : Fifty-five per cent of patients were diagnosed with at least one of the DDAs studied. In the total sample the prevalence rates were: 20.0% of palatal maxillary canine impaction, 27.4% of third molar agenesis, and 15.7% of maxillary lateral incisor microdontia. No patient exhibited any transposition or supernumerary teeth. The distribution of the DDAs studied by groups revealed a strong association of palatal canine impaction, tooth agenesis and maxillary lateral incisor microdontia with Group II but not with Group I. Conclusion : The association of DDAs with CII/2 malocclusion is not common to all types of maxillary incisor retroclination, suggesting different etiologic factors among the different manifestations of CII/2 incisor retroclination.