Epidemiological investigation of second premolar agenesis and its relationship with agenesis of other permanent teeth (original) (raw)
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Dental agenesis is associated with mesiodistal dental dimensions: a study in a Brazilian population
Conjeturas, 2022
The aimed to evaluate the association between dental agenesis and mesiodistal dimensions of permanent teeth in a Brazilian population. Dental agenesis was diagnosed using panoramic radiographs and anamnesis. Dental dimensions were evaluated using dental casts for orthodontic diagnosis and a digital caliper. Mann-Whitney test compared the tooth measurements between groups (p<0.05). The associations between dental agenesis and mesiodistal dimensions were analyzed by a general linear model adjusted by sex (p<0.05). Statistical differences were observed in the total group and the other agenesis group. Maxillary right canine, mandibular left second premolar, mandibular left first molar, and mandibular right first molar demonstrated dental dimensions were bigger in the total dental agenesis group (p<0.05). Maxillary right canine, maxillary right first molar, mandibular left first premolar, mandibular left second premolar, mandibular left first molar, and mandibular right first molar demonstrated bigger dental dimensions in the other agenesis group (p<0.05). Dental agenesis were associated with mesiodistal dimensions of permanent teeth in a Brazilian population.
Les agénésies dentaires dans la population portugaise
International Orthodontics, 2012
Objective: The aim of this retrospective study was to evaluate the prevalence and pattern of hypodontia in the permanent dentition, including and excluding third molars, in a Portuguese sample. Patients and methods: The study group comprised 2888 patients, observed between 2005 and 2009 at the Dentistry Clinic of the Instituto Superior de Ciências de Sa ude-Norte (ISCSN, Portugal). The patients were examined for evidence of hypodontia and presence or absence of deciduous teeth in those presenting agenesis. The age range varied from 7 to 21 years. In order to study the absence of the third molar, subjects under 14 years were excluded. Statistical analysis was performed using SPSS Ò. Results: Excluding third molars, the prevalence of tooth agenesis was 6.1% for the Portuguese population. Tooth agenesis was found more frequently in females than in males, although this difference was not statistically significant (P > .05). The most commonly missing tooth was the mandibular second premolar, followed by maxillary lateral incisor, and maxillary second premolar. There was a significantly higher prevalence of missing third molars in the agenesis group than in the nonagenesis group. There was a correlation between second premolar and upper lateral agenesis with presence of their corresponding deciduous teeth.
RGO - Rev. Gaúcha Odontol., 2012
Objective The purpose of this study was to assess the prevalence of hypodontia and its distribution by sex, arch and quadrant, through the analysis of panoramic radiographs from the pediatric population of the Faculty Methods Panoramic radiographs of 1,438 patients of the Faculty of Dentistry of the University of Oporto (714 boys and 724 girls between the ages of 6 and 15) were evaluated to determine the occurrence and distribution of tooth agenesis. Chi-square and Fisher's Exact Tests were performed. The level of significance was set at 5%. Results The prevalence of hypodontia was 8% (excluding the third molar). Hypodontia was found in the mandible of 74 patients (64.3%). The most commonly missing teeth were the mandibular second premolars (28.6%). The maxilla had 52.3% of the dental agenesis detected. Similarity in the distribution of missing teeth between left and right sides of the dental arches was also detected. The prevalence of oligodontia was 0.42% and the average number of missing teeth per affected child was 2.31. There were no statistically significant differences between sexes. Conclusion In a pediatric population of 1,438 patients, the prevalence of hypodontia was 8% (excluding the third molar). The results are consistent with those previously described in different populations.
A study of prevalence and distribution of tooth agenesis
Journal of medicine and life
Introduction. Tooth agenesis is a phenomenon that occurs relatively commonly. The incidence of the missing teeth presented in the previous reports varies according to the studied population. Objective. The aim of this study was to find the prevalence of tooth agenesis in a population group in Bucharest. Methods and results. The prevalence and distribution of dental agenesis was determined in a sample of 518 patients, 285 females and 233 males, aged 6 to 41 years, who had been treated in the Clinic of Orthodontics and Dentofacial Orthopedics in Bucharest. The tooth agenesis was diagnosed by using the orthodontic records and study casts for each patient. 35 of the patients, 17 males and 18 females, were diagnosed with at least one absent permanent tooth and 47 missing permanent teeth were reported. A prevalence of 6.757% was observed for tooth agenesis. The mandibular second premolar was found to be the most affected tooth, followed by the maxillary lateral incisor, maxillary second p...
A radiographic assessment of the prevalence and pattern of dental agenesis in a Nigerian population
African Journal of Oral Health, 2018
Objective: Dental agenesis is responsible for dental presentation for orthodontic, restorative and prosthodontic reasons. This study presents the prevalence and pattern of permanent tooth agenesis in a group of Nigerian patients. Methods: of orthodontic patients were assessed for missing permanent teeth. Orthopantomograms Demographic data was obtained, and the prevalence and pattern of individual tooth agenesis presented. The relationship between dental agenesis and gender, jaw as well as side affected was assessed using the Chi square test while the T-test was used to assess the variation in number Student's of missing teeth across the genders. Data was analysed using the SPSS version 22. Statistical significance was set at p<0.05. Results: Tooth agenesis including third molars was observed in 37(17.1%) while exclusion of the third molars gave an agenesis prevalence of 10.2% in 22 patients. There was no significant difference in the prevalence of dental agenesis based on gender whether third molars were considered or not (p=0.77 and p=0.37). There was no significant difference in mean number of missing tooth per person based on gender whether third molars were considered (p=0.12) or excluded from analysis (p=0.26). There was significant difference in the type of tooth involved in agenesis and the arch affected (p=0.01). Conclusion: The prevalence of dental agenesis among this group of patients is comparable with that from other populations. Excluding third molars, incisors are more predisposed to agenesis in the maxilla, while premolars are more likely not to develop in the mandible.