The pattern and prevalence of hypodontia in Koreans

Chung, Chooryung J.; Jh, Han; Kim, Kyung Ho

doi:10.1111/j.1601-0825.2007.01434.x

Cited by 142 publications

(167 citation statements)

References 24 publications

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“…Another possibility is that the difference in outcomes occurred owing to difference in the studied populations. Agenesis of one or more M3 occurs with variable frequency in different human populations; the frequencies reported vary from 0.2 to 11% in Africans, 9 to 25% in Europeans and 27 to 42% in East Asians, [37][38][39][40][41][42][43] and our observation in the Korean population (31.8%) was consistent with previous studies. Moreover, M3 agenesis is associated with crown-size reduction of the extant teeth in people of European ancestry, whereas M3 agenesis is associated with large crown size of molars in Japanese.…”

Section: Discussionsupporting

confidence: 92%

Association of common PAX9 variants with permanent tooth size variation in non-syndromic East Asian populations

et al. 2012

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Studies on the heredity of dental characteristics in humans have indicated that the variance in many dental traits results from genetic variation. However, the genetic factors that influence commonly occurring dental variants are poorly understood. Paired domain box 9 (PAX9) codes a transcription factor that is important in tooth development. We investigated whether PAX9 polymorphisms are associated with normal variations in tooth agenesis and morphology. The study subjects were 273 Japanese and 223 Korean adults. Single-nucleotide polymorphisms (SNPs) in PAX9 (rs2295222, rs4904155, rs2073244, rs12881240 and rs4904210) were genotyped, and third molar agenesis and mesiodistal and buccolingual diameters were measured. We found that four of the five SNPs were significantly associated with the crown size. However, no SNP was associated with third molar agenesis. In additional analyses on non-metric dental traits, we found significant associations of PAX9 SNPs with shoveling of upper first incisors. In summary, common variants in PAX9 contributed to morphological variation in permanent teeth in humans.

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Section: Discussionsupporting

confidence: 92%

Association of common PAX9 variants with permanent tooth size variation in non-syndromic East Asian populations

et al. 2012

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“…Evolutionary changes might as well contribute to the differences; some researchers suggested that hypodontia had increased in prevalence through time (2) whereas some studies do not support this statement (14,15).…”

Section: Materijali I Metodementioning

confidence: 94%

“…Razlika u frekvenciji može se objasniti razlikama u uzorcima zbog tehnika mjerenja -korištene su drukčije metode za radiografske i kliničke preglede, različiti su bili dob i spol te geografski ili demografski profil (2,4,13,14). Obrazac i prevalencija hipodoncije mogu varirati, ovisno o etničkim grupama (15). Evolucijske promjene također mogu pridonijeti razlikama.…”

Section: Uvodunclassified

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

Gökkaya¹,

Kargül²

2016

Acta Stomatol Croat

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“…The reason there may be a difference in M3 agenesis in the upper and lower arches is also not clear. 6 There have been some reports 26,27 showing that the skeletal morphology of hypodontia patients includes a tendency toward skeletal Class III pattern. Unfortunately, there have been few reports on the relationship between the existence of M3 germs and facial structures.…”

Section: Patterns Of Third-molar Agenesismentioning

confidence: 99%

Patterns of third-molar agenesis in an orthodontic patient population with different skeletal malocclusions

Çelikoğlu

Kamak

2011

The Angle Orthodontist

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Objective: To examine the relationship between third-molar agenesis and different skeletal malocclusion patterns. Materials and Methods: Pretreatment records of 1046 orthodontic patients (aged 13-17 years; mean age, 14.07 6 1.27) were used. Third-molar agenesis was calculated with respect to genders, number of missing teeth, jaws, and skeletal malocclusion patterns. The Pearson chi-square test was performed to determine potential differences. Results: Among the 1046 subjects, 237 subjects were diagnosed with third-molar agenesis (22.7%) with no statistical gender difference (P . .05). It was more common in the maxilla than in the mandible or in both jaws (P , .01). The prevalence of patients with a third-molar agenesis was the most commonly found type (P , .001). The prevalence of third-molar agenesis in those with a Class III malocclusion was significantly higher than in those with Class I or Class II (P , .05). However, there was similar prevalence among the hyper-divergent (24.5%), normal (23.8%), and hypodivergent (19.2%) groups (P . .05). Conclusion: These results suggest that agenesis of the third molar does not depend on vertical patterns of the skeletal malocclusions, but does depend on sagittal skeletal malocclusions in this orthodontic patient population. (Angle Orthod. 2012;82:165-169.)

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The pattern and prevalence of hypodontia in Koreans

Abstract: The pattern and prevalence of hypodontia can vary in different ethnic groups. In Koreans, the special features of hypodontia were its association with a higher level of congenital missing third molars and skeletal Class III malocclusion.

Cited by 142 publications

References 24 publications

Association of common PAX9 variants with permanent tooth size variation in non-syndromic East Asian populations

Association of common PAX9 variants with permanent tooth size variation in non-syndromic East Asian populations

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

Patterns of third-molar agenesis in an orthodontic patient population with different skeletal malocclusions

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