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Incidence and relationship of an additional root in the mandibular first permanent molar and primary molars

Authors
 Je Seon Song  ;  Seong-Oh Kim  ;  Byung-Jai Choi  ;  Hyung-Jun Choi  ;  Heung-Kyu Son  ;  Jae-Ho Lee 
Citation
 ORAL SURGERY ORAL MEDICINE ORAL PATHOLOGY ORAL RADIOLOGY AND ENDODONTICS, Vol.107(1) : 56-60, 2009 
Journal Title
ORAL SURGERY ORAL MEDICINE ORAL PATHOLOGY ORAL RADIOLOGY AND ENDODONTICS
ISSN
 1079-2104 
Issue Date
2009
MeSH
Child ; Child, Preschool ; Dental Pulp Cavity/anatomy & histology* ; Female ; Humans ; Male ; Mandible ; Molar/anatomy & histology* ; Tooth Root/anatomy & histology* ; Tooth, Deciduous/anatomy & histology
Abstract
OBJECTIVES: The mandibular first permanent and primary molars occasionally have an additional root located distolingually. This study aimed to determine the incidences of an additional root in these molars and their relationship.

STUDY DESIGN: This study involved 4050 children for whom periapical radiographs of the mandibular molar area were available. The incidence of an additional root for each molar was calculated and the pattern of concurrent additional roots in different molars was also investigated.

RESULTS: Additional roots were present in 33.1%, 27.8%, and 9.7% of the first permanent, second primary, and first primary molars, respectively. When an additional root was present in a primary molar, the probability of the posterior adjacent molar also having an additional root was greater than 94.3%.

CONCLUSION: The presence of an additional root in a primary molar can be used to predict the presence of an additional root in molars posterior to it.
Full Text
http://www.sciencedirect.com/science/article/pii/S1079210408006550
DOI
10.1016/j.tripleo.2008.09.004
Appears in Collections:
2. College of Dentistry (치과대학) > Dept. of Pediatric Dentistry (소아치과학교실) > 1. Journal Papers
Yonsei Authors
Kim, Seong Oh(김성오) ORCID logo https://orcid.org/0000-0002-8620-1377
Son, Heung Kyu(손흥규)
Song, Je Seon(송제선) ORCID logo https://orcid.org/0000-0001-8620-5629
Lee, Jae Ho(이제호) ORCID logo https://orcid.org/0000-0002-1556-3485
Choi, Byung Jai(최병재)
Choi, Hyung Jun(최형준) ORCID logo https://orcid.org/0000-0002-3315-6912
URI
https://ir.ymlib.yonsei.ac.kr/handle/22282913/103393
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