Examinando por Materia "Agenesis"

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(Universidad Privada Norbert Wiener, 2017) Cordero Chávez, Carolina Teresa de Jesús; Mezzich Gálvez, Jorge Luis
The objective of this study was to determine the frequency of dental anomalies in form, size, and number in patients aged 4 to 13 years treated at a reference radiological center in 2016. The following materials and methods were used: Permission was obtained from the Radiological Center of Stomatological Images to access panoramic radiographs of patients who visited between January and June 2016. The anomalies in form, size, number, gender, and dental piece were evaluated. Results: The prevalence of dental anomalies in the studied population was 29.8%. Of these, 8.6% were anomalies in form. Fusion was the most prevalent (3.8%), with lateral incisors and canines being the most affected teeth. Additionally, 13.4% of the cases had anomalies in number, with agenesis being the most prevalent (8.6%), mostly affecting the upper second premolar. Finally, 7.7% had anomalies in size, where macrodontia was the most common (5.7%), and the most affected teeth were the lower lateral incisors. According to sex, fusion was more frequent (1.9%) in both males and females for form anomalies. For size anomalies, macrodontia had a higher frequency (4.8%) in males, and for number anomalies, agenesis had a higher frequency (6.7%) in females. Conclusion: In the studied sample of 104 radiographs, the most prevalent anomalies were those related to number, with agenesis being the most frequent (8.6%), predominantly affecting the upper second premolars. The least prevalent anomaly was peg-shaped tooth (0.96%).
Acceso abierto

(Universidad Privada Norbert Wiener, 2017) Ramos Huayta, Rosario Jazmín; Weilg Fernandez, Miguel Angel
The objective of this study was to determine the prevalence of dental anomalies in number in patients attending the Orthodontics Service of the Police National of Peru Dental Clinic in Angamos, Lima, from 2010 to 2016. The study was descriptive and retrospective. The sample consisted of 154 conventional and digital panoramic radiographs, clinical records, and orthodontic files, with ages ranging from 6 to 25 years. A data collection form was designed specifically for the objectives of the study. The results were analyzed using descriptive statistics with frequency analysis. The study concluded that the prevalence of dental anomalies in number was 38 cases (24.7%), with hypodontia found in 32 patients (20.8%) and hyperdontia in 6 (3.9%). The upper jaw was the most affected (47.37%), followed by the lower jaw (13.16%) and both jaws (13.16%). The most affected teeth by agenesis were the lower third molars (34.5%), followed by the upper third molars (30.9%). Canines were also among the most affected teeth by agenesis. Regarding hyperdontia, 7 supernumerary teeth were found, with 3 in the parapremolar region, 2 in the molar region, and 2 in the premaxilla (mesiodens and lateral). No cases of distomolar were found. Finally, regarding sex, it was concluded that males were more affected by dental anomalies in number with 22 cases (28.2%) and were the only ones with hyperdontia. No statistically significant differences were found. It is recommended that general dentists include this valuable auxiliary examination as part of a protocol, as it plays an important role in diagnosis and treatment.