An orthopantomographic study of hypodontia in permanent teeth of Japanese pediatric patients

Abstract

Hypodontia of permanent teeth was evaluated from orthopantomograms of 2072 apparently healthy pediatric patients at The Hospital of Nihon University School of Dentistry at Matsudo. The prevalence of congenitally missing teeth (CMT) was 8.7% in boys and 10.8% in girls, and 9.4% for both sexes combined. Most cases (67.8%) involved either one or two missing teeth. There were in total 574 CMT, and on average 2.8 teeth were missing per child. The most commonly absent tooth was the mandibular second premolar. On the other hand, no first molars were missing in any case. A high frequency of CMT mandibular incisors (18.82%) was observed, and this seems to be a characteristic peculiar to individuals of Asian ethnicity. Oligodontia (6 or more CMT excluding the third molar) ranged from 6 to 14 teeth, with a prevalence of 1.4% in general: 1.8% for girls and 0.9% for boys. Symmetry of CMT was predominant: 214 pairs for bilateral symmetry and 107 pairs for symmetry between two antagonistic quadrants. The distribution of CMT between maxillary and mandibular hypodontia in the right and left quadrants for boys and girls no had significant association (P < 0.05).

Prevalence and Pattern of Non-Syndromic Hypodontia in a Group of Turkish Children

“…Oligodontia refers to the absence of more than six teeth, excluding third molars. Dental agenesis affects more frequently the permanent dentition rather than the primary dentition (1,2,3,4). Hypodontia may detrimentally affect the aesthetics and function (4,5,6,7).…”

Ege Bölgesi̇ Çocuklarinda Konjeni̇tal Dai̇mi̇ Di̇ş Eksi̇kli̇ği̇ Prevalansinin Araştirilmasi

“…[2][3][4][5][14][15][16]18,19,21 Literatür incelendiğinde en sık eksikliği gözlenen dişlerin üst yan kesici dişler olduğunu bildiren çalışmalara da rastlanmaktadır. 15,20 Konjenital daimi diş eksikliğinin araştırılmasında hem radyografilerden hem de klinik muayeneden yararlanılması tavsiye edilir. 14,19,20 Sadece klinik muayene ile tespit edilen daimi diş eksikliğinin konjenital bir eksiklik olup olmadığının belirlenmesinde panoramik radyografiden yararlanılması gerekmektedir.…”

Prevalencia de anomalías dentarias de número en pacientes infantiles y adolescentes de las clínicas odontológicas de la Universidad del Valle desde el 2005 hasta el 2012

“…En los resultados de nuestra investigación, la prevalencia de agenesia dental (excluyendo los terceros molares) es baja, con un porcentaje de 3,8%, en comparación con estudios realizados en diversos países, como la investigación de Iglesias et al [2] en Venezuela con 6,9%, o la de Goya et al [30] en Japón con 9,4% de prevalencia, o en el estudio de Vibhute et al [31] en la India con 10,4%. Esta investigación obtuvo resultados similares al del Polder et al [32] en Norteamérica, con 3,9%.…”