Radiographic Evaluation of the Prevalence of Dental Anomalies of Number
Introduction:Dental anomalies of number can be defined as any abnormality in the number of teeth in a subject’s oral cavity. When a tooth is absent, the patient presents tooth agenesis (classified as hypodontia, oligodontia, or anodontia, depending on the number of missing teeth). If supernumerary t...
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| Format: | Dissertation |
| Language: | Portuguese |
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ProQuest Dissertations & Theses
01-01-2022
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| Online Access: | Get full text |
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| Summary: | Introduction:Dental anomalies of number can be defined as any abnormality in the number of teeth in a subject’s oral cavity. When a tooth is absent, the patient presents tooth agenesis (classified as hypodontia, oligodontia, or anodontia, depending on the number of missing teeth). If supernumerary teeth are present, patients are diagnosed with hyperdontia. The prevalence of tooth agenesis is generally estimated between 1,6% and 36,5%, being most common among females, while supernumerary teeth have a prevalence of about 0,04% to 3%, being most common among males. Dental anomalies of number have been associated with several genetic syndromes and, more recently, with certain malignant tumors. The proper diagnosis of these anomalies requires a good understanding of the chronology of eruption for human dentition.Objectives:This study aims to determine the prevalence of both tooth agenesis and supernumerary teeth and characterize both anomalies in a Portuguese pediatric population.Methodology:Clinical records of patients attending Pediatric Dentistry appointments in the Faculty of Dental Medicine of the University of Porto were consulted. Appointments from September 2020 to December 2021 were analyzed. For each patient, their sex and age (at the time of their orthopantomography) were recorded, along with any relevant data in their clinical history. Patients were included in this study if their records contained an orthopantomography dated from January 2010 to December 2021 and if they were aged 4 to 17 years old at the time of their orthopantomography. They were excluded if their clinical records contained a diagnosis of any genetic syndrome or if their orthopantomography was of insufficient quality. Statistical analysis of the results was conducted using Chi-Square tests with a significance level of 0,05.Results:This study found a prevalence for tooth agenesis of 20,83% (11,81% excluding the third molars) and a prevalence for supernumerary teeth of 1,39%. Male patients had a higher prevalence of tooth agenesis (26,1%) compared to female patients (16%), with no statistical significance (p>0,05). The most affected teeth were the third molars, followed by the second premolars. Tooth agenesis was more common on the mandibular arch (52,63% of all cases), with no statistical significance (p>0,05). Two cases of supernumerary teeth were found, both in male patients and in the second quadrant, being morphologically identical to lateral incisors. No statistical significance was inferred regarding sex. (p>0,05).Conclusions:The results of this study contributed to the existing data regarding the prevalence of dental anomalies of number within the Portuguese population. The importance of complete medical and dental records, as well as clinical examination were highlighted. The diagnosis of dental anomalies of number may contribute towards early intervention in cases of genetic syndromes or certain types of cancer. |
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| ISBN: | 9798383385128 |