Abstract
Background
Several hypotheses have been proposed to explain hypodontia of the various tooth types with evolutionary and anatomic models. Hypodontia of all primary canines in a healthy individual is exceptionally rare and has not been previously reported in the dental literature.
Case report
This clinical report describes a 4-year-old southern Chinese female with the congenital absence of the primary canines in all quadrants. Furthermore, all of the permanent tooth germs excluding the third molars were evident on a panoramic radiograph and were developing consistent with the subject’s chronological age.
Conclusion
This case serves as an excellent example to refute the conventional wisdom that “all primary canines can never go missing” and that all of the currently proposed hypotheses to explain hypodontia have limitations.
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References
Birnboim-Blau G, Spierer S, Keinan D. Congenital bilateral missing primary mandibular canines while their successors exist: a case report. Dentistry. 2014;4:224.
Butler PM. Studies of the mammalian dentition—differentiation of the postcanine dentition. Proc Zool Soc Lond B. 1939;109:1–36.
Cho SY, Lee CK. Congenitally missing maxillary primary canines: report of three cases. Int J Paediatr Dent. 2006;16:444–7.
Daugaard-Jensen J, Nodal M, Kjaer I. Pattern of agenesis in the primary dentition: a radiographic study of 193 cases. Int J Paediatr Dent. 1997;7:3–7.
Kjaer I. Can the location of tooth agenesis and the location of initial bone loss seen in juvenile peri-odontitis be explained by neural developmental fields in the jaws? Acta Odontol Scand. 1997;55:70–2.
Rodd HD, Davidson LE. ‘Ilko Dacowo:’ canine enucleation and dental sequelae in Somali children. Int J Paediatr Dent. 2000;10:290–7.
Sofaer JA, Chung CS, Niswander JD, Runck DW. Developmental interaction, size and agenesis among permanent maxillary incisors. Hum Biol. 1971;43:36–45.
Svinhufvud E, Myllarniemi S, Norio R. Dominant inheritance of tooth malpositions and their association to hypodontia. Clin Genet. 1988;34:373–81.
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Anthonappa, R.P., King, N.M. Hypodontia of all primary canines. Eur Arch Paediatr Dent 17, 485–487 (2016). https://doi.org/10.1007/s40368-016-0259-3
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DOI: https://doi.org/10.1007/s40368-016-0259-3