Journal of Prevention and Treatment for Stomatological Diseases ›› 2017, Vol. 25 ›› Issue (5): 316-319.doi: 10.12016/j.issn.2096-1456.2017.05.008

• Cinical Study • Previous Articles     Next Articles

Clinical study of root canal numbers in maxillary second primary molars

Rui-zhi JIA(), Dong-mei YANG, Jia-jian SHANG()   

  1. Department of Pediatric Dentistry, Capital Medical University Beijing Stomatological Hospital, Beijing 100050, China
  • Received:2017-01-09 Revised:2017-01-30 Online:2017-05-20 Published:2018-09-03

Abstract:

Objective To investigate the root canal numbers of maxillary second primary molars. Methods 216 max illary second primary molars from 204 children aged 3-8 years old were selected. All the teeth need to do the root canal therapy. After opening the pulp chamber, the root canal were examined and determined with small size K file and 17%ethylene diaminetetraacetic acid (EDTA). Hand instruments were used for root canal preparation and then zinc-oxide iodoform paste was used for filling. Results 216 maxillary second p rimary molars, 122 teeth had three root canals(56.5%), and 94 teeth had four root canals (43.5%). The incidence of second mesiobuccal canal (MB2) was 41.2%. There was no correlation between the incidence of the MB2 canal and gender and tooth position. Conclusion The root canals of maxillary second primary molars had more variations, and there was a high incidence of the second mesiobuccal canal.

Key words: Maxillary second primary molars, Root canals number, Second mesiobuccal canal, Root canal therapy, Root canal variation

CLC Number: 

  • R781.05

Figure 1

The floor of pulp chamber in maxillary second primary molar"

Figure 2

The root canal variations showed in the filling film"

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