Browse > Article
http://dx.doi.org/10.5933/JKAPD.2015.42.2.172

Abberant Root Morphology in the Permanent First Molars : Case Reports  

Lee, Eunkyoung (Department of Pediatric Dentistry, School of Dentistry, Kyungpook National University)
Kim, Youngjin (Department of Pediatric Dentistry, School of Dentistry, Kyungpook National University)
Kim, Hyunjung (Department of Pediatric Dentistry, School of Dentistry, Kyungpook National University)
Nam, Soonhyeun (Department of Pediatric Dentistry, School of Dentistry, Kyungpook National University)
Publication Information
Journal of the korean academy of Pediatric Dentistry / v.42, no.2, 2015 , pp. 172-179 More about this Journal
Abstract
The developmental mechanism of root formation is a complex process. Hereditary and environmental factors may affect the morphology of the developing root. A total of 12 cases was presented with permanent first molars with abberant root morphology. Clinically, these teeth appeared as a normal crown. However, radiographically, the root was slender, twisted and characterized by irregular lengths. In addition, root trunk length was shorter and pulp chamber was obliterated. In these cases, periapical radiolucency and loss of lamina dura were often observed. In 6 cases, an abnormal root of the primary second molars were also present, as well as root malformation of permanent first molars. In 3 cases, permanent central incisors also had a dysmorphic crown. These cases almost all had medical history, such as premature birth, brain infection or congenital heart disease in infants. The present paper describes cases of permanent first molars with an abnormal root that are rarely reported in literature. This case may intensify the variation in the permanent first molar and is intended to reinforce the clinician's awareness of rare morphology of the roots.
Keywords
Abberant root morphology; Permanent first molar; Premature birth;
Citations & Related Records
Times Cited By KSCI : 5  (Citation Analysis)
연도 인용수 순위
1 Avery JK, Steele PF, Avery N : Oral Development and Histology, 2nd edition. Thieme Medical Pub Inc., 94-108, 1994.
2 Teaford M, Smith MM, Ferguson MWJ, et al. : Development, Function and Evolution of Teeth. 1st edition. Cambridge University Press, 212, 2000.
3 Maguire JJ, Murray AW, Kernahan CJ : Radiological features of the long-term effects from treatment of malignant disease in childhood. Pediatr Dent, 7:99-102, 1987.
4 Casamassimo PS, Fields HW, Nowak AJ, et al. : Pediatric dentistry: infancy through adolescence. Elsevier, 61-62, 2012.
5 Yoon SI, Choi HJ, Son HK, et al. : Bilaterally primary first molars with single root. J Korean Acad Pediatr Dent, 31:701-703, 2004.
6 Kim SH, Kim YJ, Nam SH, et al. : Familial Occurrence of Dentin Dysplasia Type I: Case Report. J Korean Acad Pediatr Dent, 41:47-53, 2014.   DOI
7 Witkop CJ : Hereditary defects of dentin. Dent Clin North Am, 19:25-45, 1975.
8 Logan J, Becks H, Pindborg JJ, et al. : Dentinal dysplasia. Oral Surg Oral Med Oral Pathol, 15:317-333, 1962.   DOI   ScienceOn
9 Wesley RK, Wysoki GP, Jackson J, et al. : Dentin dysplasia type I: Clinical, morphologic, and genetic studies of a case. Oral Surg Oral Med Oral Pathol, 41:516-524, 1976.   DOI   ScienceOn
10 Crowford PJ, Aldred MJ : Regional odontodysplasia: a bibliography. J Oral Pathol Med, 18:251-263, 1989.   DOI
11 Lee HS, Kim JM, Jeong TS, et al. : The management of regional odontodysplasia of permanent teeth in children. J Korean Acad Pediatr Dent, 35:737-743, 2008.
12 Sadeghi EM, Ashrafi MH : Regional odontodysplasia: clinical, pathologic, and therapeutic considerations, J Am Dent Assoc, 102:336-336, 1981.   DOI
13 Spini TH, Sargenti-Neto S, Cardoso SV, et al. : Progressive dental development in regional odontodysplasia. Oral Surg Oral Med Oral Pathol Oral Radiol Endod, 104:40-45, 2007.
14 Van der Wal JE, Rittersma J, Baart JA, et al. : Regional odonto dysplasia: report of three cases. Int J Oral Maxillofac Surg, 22:356-358, 1993.   DOI
15 Lee HS, Kim SH, Kim SO, et al. : A new type of dental anomaly: molar-incisor malformation (MIM). Oral Surg Oral Med Oral Pathol Oral Radiol, 118:101-109, 2014.   DOI
16 Witt CVA, Hirt T, Rutz G, Luder HU : Root malformation associated with a cervical mineralized diaphragm - a distinct form of tooth abnormality? Oral Surg Oral Med Oral Pathol Oral Radiol, 117:e311-e319, 2014.   DOI
17 Park JC, Yeek Herr, Cho MI. et al. : Nfic Gene Distribution inhibits differentiation of odontoblast responsible for root formation and results in formation of short and abnormal roots in mice. J Periodontol, 78:1795-1802, 2007.   DOI
18 George SP, Kenneth GB, Richard MG, et al. : Essential Role for NFI-C/CTF Transcription-Replication Factor in Tooth Root Development. Mol. Cell. Biol, 23:1075-1084, 2003.   DOI
19 Vello MA, Martinez-Costa C, Guijarro-Martinez R, et al. : Prenatal and neonatal risk factors for the development of enamel defects in low birth weight children. Oral Diseases, 16:257-262, 2010.   DOI
20 Aine L, Backstrom MC, Maki M, et al. : Enamel defects in primary and permanent teeth of children born prematurely. J Oral Pathod Med, 29:403-409, 1999.
21 Seow WK : A controlled study of the development of the permanent dentition in very-low birth weight children. Pediatr Dent, 18:379-84, 1996.
22 Hallett KB, Radford DJ, Seow WK. : Oral health of children with congenital cardiac diseases: a controlled study. Pediatr Dent, 14: 224-230, 1992.
23 Seow WK : Effect of preterm birth on oral growth and development. Australian Dental Journal, 42:85-91, 1997.   DOI
24 Falicity Crombie, David Manton, Nicola Kilpatrick. : Aetiology of molar-incisor hypomineralization: a critical review. Int J Paediatr Dent, 19:73-83, 2009.   DOI
25 Shin JH, An UJ, Jeong TS, et al. : The prevalence of molar incisor hypomineralization and status of first molars in primary school children. J Korean Acad Pediatr Dent, 37:179-185, 2010.
26 Jeong HK, Yang YM, Soh YR, et al. A pattern of the formation and eruption of first permanent molars. J Korean Acad Pediatr Dent, 37:317-327, 2010.