Association between Tooth Agenesis and Skeletal Malocclusions
| Autor: | Erika Calvano Küchler, Ana M. Costa, Léa Assed Bezerra da Silva, Karla Carpio Horta, Fábio Lourenço Romano, Raquel Assed Bezerra da Silva, Mariana Trevizan, Mirian Aiko Nakane Matsumoto, Paulo Nelson-Filho |
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| Jazyk: | angličtina |
| Rok vydání: | 2017 |
| Předmět: |
Original Paper
business.industry Tooth Abnormality Dentistry anodontia 030206 dentistry medicine.disease Anodontia lcsh:RK1-715 03 medical and health sciences stomatognathic diseases 0302 clinical medicine birth defects stomatognathic system 030220 oncology & carcinogenesis lcsh:Dentistry medicine tooth abnormalities Tooth agenesis business |
| Zdroj: | eJournal of Oral Maxillofacial Research, Vol 8, Iss 2, p e3 (2017) Journal of Oral & Maxillofacial Research |
| Popis: | Objectives The aim of this study was to evaluate the association between tooth agenesis and skeletal malocclusions in Brazilian non-syndromic orthodontic patients. Material and Methods Pretreatment orthodontic records of 348 patients of both genders and with various skeletal malocclusions were examined. Tooth agenesis was evaluated in panoramic radiographs. Angular measurements were taken from lateral cephalometric radiographs to classify the patient’s malocclusion as skeletal Class I, Class II and Class III. Subjects were divided into 2 groups, “with tooth agenesis” and “without tooth agenesis”. Chi-square or Fisher exact test was used to compare categorical data. ANOVA with Tukey’s post-test was used for means comparisons. An alpha of 5% was established. Results From 348 analysed patients, 28 presented tooth agenesis. There was no difference between genders (P = 0.27) nor mean age (P = 0.16). The most prevalent skeletal malocclusion was Class I (63.11%), followed by Class II (25.94%), and Class III (10.95%). The mean of congenitally missing teeth was 1.3 (SD 0.13). Thirteen subjects had premolar agenesis, 13 upper lateral incisor agenesis, 4 lower incisor agenesis and 2 molars agenesis. The group with tooth agenesis presented A point-nasion-B point (ANB) angle smaller (1.66 [SD 2.52]) than the group without tooth agenesis (2.86 [SD 2.49]) (P = 0.01). ANB angle had a negative correlation with the number of congenitally missing teeth (P = 0.039; r = -0.39). Conclusions Tooth agenesis is associated with a smaller A point-nasion-B point angle and is negatively correlated with the number of congenitally missing teeth. |
| Databáze: | OpenAIRE |
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