Tooth sizes in nonsyndromic hypodontia patients

Abstract

Objective: To evaluate and compare the sizes of teeth in mild and severe hypodontia patients with those of healthy controls. Materials and Methods: Dental casts of 154 patients with two or more congenitally missing teeth were obtained. Patients were divided into two groups according to severity of hypodontia. Group I (mild) consisted of 118 patients with two to five missing teeth. Group II (severe) consisted of 36 patients with six or more missing teeth. In addition, a control group was included, which consisted of 50 patients who had an Angle Class I jaw relationship and no missing teeth. Mesiodistal and labiolingual dimensions of the teeth were measured with a digital caliper on dental casts. The independent-samples t-test was used to evaluate the effect of gender on measurements. Intergroup differences for mesiodistal and labiolingual dimensions were evaluated with analysis of variance and post hoc Tukey tests. Results: Statistically significant differences were found between girls and boys with hypodontia in the mesiodistal dimension of the mandibular first premolar and the labiolingual dimension of the mandibular lateral incisor (P , .01). Mesiodistal and labiolingual width measurements of the teeth of hypodontia patients showed statistically significant differences compared with the control group (P , .05). Most teeth showed significant dimensional reductions in severe hypodontia compared with mild hypodontia (P , .05). Conclusions: The mesiodistal and labiolingual dimensions of teeth in both mild and severe hypodontia groups were smaller than those in control subjects. The reduction in size was more excessive in the severe hypodontia group. The teeth showing the greatest difference in tooth dimensions were the maxillary lateral incisor (in mesiodistal dimension) and the mandibular canine (labiolingual dimension). (Angle Orthod. 2013;83:16-21.)

Validity of the Demirjian method for dental age estimation for Southern Turkish children

“…Subjects with systemic diseases affect the growth and development of the teeth and tooth agenesis excluded from the study because dental anomalies like hypodontia could affect tooth development and eruption. [22,23] In addition, malocclusions such as cross bite and sagittal skeletal discrepancies might affect the dental development as reported by some authors. [24,25] In the present study, care was taken while selecting the patients so that none had posterior cross bite and skeletal sagittal malocclusions.…”

Congenitally missing teeth (hypodontia): A review of the literature concerning the etiology, prevalence, risk factors, patterns and treatment

“…[ 2 3 4 8 14 20 31 32 33 ] While some researchers have reported that the size of teeth and the width of the dental arch are not related to dental agenesis,[ 68 ] some others reported conflicting results indicating that CMT is associated with dental anomalies such as microdontia and decreases in the size of the incisors and canines as well as conical or tapered teeth such as peg lateral. [ 14 28 31 164 165 ] However, some investigators did not find a link between tooth agenesis and microdontia but with peg laterals. [ 14 ] They concluded that CMT was not associated with changes in the overall tooth size, while changes in tooth morphology especially in the maxillary lateral incisors might still be possible.…”

“…Both CMT and taurodontism seem to be a part of syndromes characterized by decreased mitotic cellular activity which might also affect dental germ development. [ 4 ] On the other hand, some other studies found clear associations between both mild and severe CMT and reduced tooth size,[ 21 32 160 165 167 ] especially in the upper laterals (in the mesiodistal dimension) and the lower canines (the labiolingual dimension). [ 165 ] The latter agrees with the synergism and allelism of major genes possibly affecting CMT.…”

Three-dimensional evaluation of root dimensions and alveolar ridge width of maxillary lateral incisors in patients with unilateral agenesis

“…McKeown et al [ 15 ] found a reduction in crown width in both buccolingual and mesiodistal dimensions in cases with oligodontia. Gungor and Turkkahraman [ 16 ] evaluated tooth dimensions in mild and severe hypodontia cases and found that the mesiodistal and buccolingual dimensions of the teeth in both mild and severe hypodontia were smaller. In addition, the maxillary lateral incisor showed the greatest reduction in the mesiodistal dimension.…”