Hypodontia In Permanent Dentition Research Articles

Prevalence of Hypodontia in North Indian Orthodontic Subjects and its Association with Other Dental Anomalies

Abstract Objectives: The objectives of the present study were to (a) estimate the prevalence of hypodontia in permanent dentition of the North Indian Orthodontic subjects and to compare the results of the present study with specific findings of other populations; (b) evaluate occurrence of hypodontia in relation to gender, tooth type, location and pattern of distribution in maxillary and mandibular dental arches. Materials and Methods: Initial Pretreatment Orthodontic records of 1063 patients in the age range of 12–30 years collected from the archives of the department and the subjects who reported to the routine outpatient department of the department for orthodontic treatment and gave their consent for collecting pre–treatment orthodontic records. The initial pretreatment records to diagnose hypodontia and other dental anomalies included (a) orthodontic study models, (b) orthopantomograms, and (c) relevant findings from patient history sheets. Results: Thirty-two subjects fulfilled the selection criteria thus, giving the prevalence rate of hypodontia in the North Indian Orthodontic population of 3.01% out of which 21 were females and 11 were males with most common age group of 12–15 years. Maximum number of subjects were found to have only 1 CMT more commonly in the anterior region than the posterior region of the jaw and more in mandibular arch with mandibular central incisor to be the most common type of congenitally missing permanent tooth. In majority of hypodontia subjects, the most common associated dental anomaly was retained primary tooth. Conclusion: The prevalence of hypodontia of this study was within the range of that reported in the literature. Prompt diagnosis of hypodontia and other anomalies at an early age can help in planning various treatment modalities with a multidisciplinary team approach to establish a functional and esthetic dentition.

Prevalence of nonsyndromic hypodontia in a south-east Transylvanian region.

Abstract Introduction. Clinicians claim that the prevalence of hypodontia has skyrocketed in recent years. However, there is no clear evidence whether it is really a change in dentition in Homo Sapiens or a purely hypothetical observation, due to the advanced modern technology used in the diagnosis of dento-maxillary anomalies. The aim of this study was to establish the prevalence and distribution of nonsyndromic hypodontia in young patients from the South-East Transylvanian region of Romania. Material and methods. A number of 325 dental charts were selected. The patients who needed orthodontic treatment were treated in the Pedodontics Department and Orthodontic Department of UMFST “George Emil Palade“ Targu Mures and two private dental offices during 2017-2019. The age of the patients was between 12 and 25 at the moment when the clinical and paraclinical examination were performed. Results. From a total number of 275 cases investigated, 78 patients were diagnosed with hypodontia in permanent dentition, not taking into consideration the third molars. Hypodontia’s prevalence is 6.47% for patients which seek orthodontic treatment, without taking into consideration the third molars. This value is found in the range of 2.8%-11.3% reported in studies in the literature. The present study showed that hypodontia affects a greater proportion of females (6.83%) than males (5.74%), without statistically significant differences. Conclusions. The prevalence of non-syndromic hypodontia in permanent dentition, compared to the total number of patients who requested orthodontic treatment, is 6.47%, being higher than the data reported in the literature of our country, but falls within the range reported in the international literature in general.

Prevalence and Pattern of Hypodontia among Croatian Orthodontic Patients.

ObjectiveThe objective of this retrospective study was to assess the prevalence of hypodontia in the permanent dentition among Croatian orthodontic patients. The occurrence was evaluated concerning gender, specific missing teeth, the location, pattern of distribution in the maxillary and mandibular arches and sagittal and vertical skeletal pattern.Material and MethodsThe sample consisted of 194 patients (75 males and 119 females) from the Department of Orthodontics, Dental Clinic, Clinical Hospital Center Zagreb. Based on the severity of hypodontia the sample was divided into mild (1-2 missing teeth), moderate (3-5 missing teeth) and severe groups (6 or more missing teeth). The location of missing teeth was used to further divide the sample into anterior (intercanine region), posterior (premolars and molars) and anteroposterior groups. In addition, jaw localization of hypodontia was also considered.ResultsPermanent dentition hypodontia among Croatian orthodontic patients was found to be generally mild (80%), and a distribution was similar in the maxilla (39%) and the mandible (41%), as well as in the anterior and posterior segments of dental arch (44%). The number of missing teeth per person ranged from 1 to 12, with no significant difference between genders. The severity and location of hypodontia did not differ significantly between the genders, as well as in between the categories of sagittal and vertical skeletal patterns.ConclusionPresent results suggest that the treatment plan for patients with hypodontia in permanent dentition should be individualized and adjusted for each case.

Prevalence of second premolar hypodontia in the Polish cleft lip and palate population

BackgroundCleft lip and/or palate is the most frequent congenital abnormality occurring in the craniofacial region and is often associated with numerous dental defects such as tooth agenesis, supernumerary teeth, microdontia, taurodontism, crown malformations, or delay in eruption. The prevalence of hypodontia in cleft-affected patients is much higher in comparison with a healthy population. The aim of this study was to evaluate the prevalence of second premolar hypodontia in patients with cleft lip and/or palate.Material/MethodsWe performed a retrospective, evaluation of panoramic radiographs and dental casts in the Department of Dentofacial Orthopeadics and Orthodontics, Wroclaw Medical University. Two independent observers evaluated the records of 469 patients with various types of clefts and analyzed dental casts and panoramic radiographs.Results202 individuals met inclusion criteria. The sample comprised 120 UCLP patients, 38 BCLP patients, 28 CP patients, and 17 CLA patients. Hypodontia in the premolar region was observed in 39 individuals (19.3%). A total number of 58 second premolars were missing, of which 35 were maxillary second premolars (U5) and 23 were mandibular second premolars (L5).ConclusionsEstimated hypodontia in the Polish CL/P sample was considerably higher than the hypodontia in permanent dentition reported for a European healthy population. The number of congenitally missing second premolars was higher in the maxillary arch than in the mandibular.

Dental management of 49,XXXXY syndrome with taurodontism: A case report

A Japanese male with a karyotype of 49,XXXXY was presented for dental treatments from 6 years to 20 years of age. The patient had pulmonary stenosis as well as mental retardation, hypogonadism, fifth finger and toe clinodactyly, genu valgus, pes cavus and mandibular prognathism. Dental manifestations revealed multiple caries and taurodontism of both primary and permanent dentitions and hypodontia in permanent dentition. Dental management of a patient with 49,XXXXY syndrome is important to accomplish both controlling behavioral problems and medical considerations for preventing infective endocarditis.

A CASE OF LOWER ANTERIOR PRIMARY TEETH FUSION

Dental fusion is the most common problem seen in the primary dentition. The incidence of dental fusion was approximately 0.5% for deciduous dentition and 0.1% for permanent dentition. Fusion may be complete or incomplete. Its etiology was related to genetic or local factor. These anomalies could result in dental caries, esthetic problem, periodontal disease, dental malocclusion, and hypodontia in permanent dentition. Treatment of fused teeth depends on the location and extent of fusion. This report describes an incomplete dental fusion with dentinal caries occurred on 72 and 73 while 32 was agenesis. The purpose of the treatment was to improve the esthetic performance and subsequently to keep the teeth until the exfoliation time. After the restoration of 72 and 73, the patient feels satisfied.