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HOME > Restor Dent Endod > Volume 35(1); 2010 > Article
Basic Research Pulp response of beagle dog to direct pulp capping materials: Histological study
Ji-Hyun Bae1, Young-Gyun Kim2, Pil-Young Yoon2, Byeong-Hoon Cho3orcid, Yong-Hoon Choi1
2010;35(1):-12.
DOI: https://doi.org/10.5395/JKACD.2010.35.1.005
Published online: January 31, 2010

1Department of Conservative Dentistry, Seoul National University Bundang Hospital, Korea.

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Corresponding Author: Yong-Hoon Choi. Department of Conservative Dentistry, Seoul National University Bundang Hospital, 300 Gumi-dong, Bundang-gu, Seongnam-si Gyeonggi-do, 463-707, Korea. Tel: 82-31-787-2780, Fax: 82-31-787-4068, yhchoi@snubh.org
• Received: September 8, 2009   • Revised: October 1, 2009   • Accepted: October 23, 2009

Copyright © 2010 Korean Academy of Conservative Dentistry

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  • The purpose of this study was to evaluate the pulp tissue reaction to direct pulp capping of mechanically exposed beagle dogs'pulp with several capping materials. A total of 36 teeth of 2 healthy beagle dongs were used. The mechanically exposed pulps were capped with one of the followings: (1) Mineral Trioxide Aggregate (MTA: ProRoot® MTA, Dentsply, Tulsa, USA), (2) Clearfil SE Bond (Dentin adhesive system: Kuraray, Osaka, Japan), (3) Ultra-Blend (Photo-polymerized Calcium hydroxide: Ultradent, South Jordan, USA), (4) Dycal (Quick setting Calcium hydroxide: LD Caulk Co., Milford, USA) at 7, 30, and 90 days before sacrificing. The cavities were restored with Z350 flowable composite resin (3M ESPE, St. Paul. MN, USA). After the beagle dogs were sacrificed, the extracted teeth were fixed, decalcified, prepared for histological examination and stained with HE stain. The pulpal tissue responses to direct pulp capping materials were assessed.
    In MTA, calcium hydroxide, and photo-polymerized calcium hydroxide groups, initial mild inflammatory cell infiltration, newly formed odontoblast-like cell layer and hard tissue bridge formation were observed. Compared with dentin adhesive system, these materials were biocompatible and good for pulp tissue regeneration.
    In dentin adhesive system group, severe inflammatory cell infiltration, pulp tissue degeneration and pulp tissue necrosis were observed. It seemed evident that application of dentin adhesive system in direct pulp capping of beagle dog teeth cannot lead to acceptable repair of the pulp tissue with dentine bridge formation.
  • Keywords: Direct pulp capping; Pulp inflammation; Dentinal bridge; Histological evaluation; Beagle dog
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Figure 1
a. Pulp capping with MTA at 7 days. Inflammatory cells infiltrated around the capping material under odontoblast-like cell. b. Pulp capping with MTA at 30 days. Newly formed dentinal bridge was observed. c. Pulp capping with MTA at 90 days. The thickness of hard tissue increased, compared with that of 30 days.
jkacd-35-5-g001.jpg
Figure 2
a. Pulp capping with SE Bond at 7 days. Inflammatory cells infiltrated accompanied by soft tissue disturbances. b. Pulp capping with SE Bond at 30 days. Coronal pulp tissue necrosis beneath the exposure site was observed. c. Pulp capping with SE Bond at 90 days. Severe pulp tissue necrosis beneath the exposure site was seen.
jkacd-35-5-g002.jpg
Figure 3
a. Pulp capping with Ultra-blend at 7 days. Inflammatory cell infiltration and hemorrhage was observed. b. Pulp capping with Ultra-blend at 30 days. Odontoblast-like cells arranged beneath exposure site. Pulp degeneration and partial pulp necrosis was seen. There was no hard tissue formation. c. Pulp capping with Ultra-blend at 90 days. Complete dentinal bridge protected the exposure site.
jkacd-35-5-g003.jpg
Figure 4
a. Pulp capping with Dycal at 7 days. Pulp tissue degeneration was seen. b. Pulp capping with Dycal at 30 days. Partial pulp tissue degeneration and hard tissue formation were observed. c. Pulp capping with Dycal at 90 days. Complete hard tissue formation and normal soft tissue organization beneath the exposure site.
jkacd-35-5-g004.jpg
Table 1
Criteria for grading inflammatory cell response
jkacd-35-5-i001.jpg
Table 2
Criteria for grading hard tissue formation
jkacd-35-5-i002.jpg
Table 3
Inflammatory responses and hard tissue formation resulted with 4 pulp capping materials
jkacd-35-5-i003.jpg

Tables & Figures

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    • Experimental Study of Pulp Capping Using Xenogenic Demineralized Dentin Paste
      Ji-Young Yun, Yong-Hoon Choi, Young-Kyun Kim, In-Woong Um, Joo-Cheol Park, Ji-Yoon Kim
      Journal of Hard Tissue Biology.2016; 25(3): 321.     CrossRef
    • Comparison of gene expression profiles of human dental pulp cells treated with mineral trioxide aggregate and calcium hydroxide
      Yong-Beom Kim, Won-Jun Shon, Woocheol Lee, Kee-Yeon Kum, Seung-Ho Baek, Kwang-Shik Bae
      Journal of Korean Academy of Conservative Dentistry.2011; 36(5): 397.     CrossRef
    • Gene expression profiling in human dental pulp cells treated with mineral trioxide aggregate
      Yong-Beom Kim, Won-Jun Shon, WooCheol Lee, Kee-Yeon Kum, Seung-Ho Baek, Kwang-Shik Bae
      Journal of Korean Academy of Conservative Dentistry.2010; 35(3): 152.     CrossRef
    • Histology of dental pulp healing after tooth replantation in rats
      Eun-Jin Go, Han-Seong Jung, Eui-Seong Kim, Il-Young Jung, Seung-Jong Lee
      Journal of Korean Academy of Conservative Dentistry.2010; 35(4): 273.     CrossRef

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      Pulp response of beagle dog to direct pulp capping materials: Histological study
      J Korean Acad Conserv Dent. 2010;35(1):5-12.   Published online January 31, 2010
      DOI: https://doi.org/10.5395/JKACD.2010.35.1.005
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    Pulp response of beagle dog to direct pulp capping materials: Histological study
    Image Image Image Image
    Figure 1 a. Pulp capping with MTA at 7 days. Inflammatory cells infiltrated around the capping material under odontoblast-like cell. b. Pulp capping with MTA at 30 days. Newly formed dentinal bridge was observed. c. Pulp capping with MTA at 90 days. The thickness of hard tissue increased, compared with that of 30 days.
    Figure 2 a. Pulp capping with SE Bond at 7 days. Inflammatory cells infiltrated accompanied by soft tissue disturbances. b. Pulp capping with SE Bond at 30 days. Coronal pulp tissue necrosis beneath the exposure site was observed. c. Pulp capping with SE Bond at 90 days. Severe pulp tissue necrosis beneath the exposure site was seen.
    Figure 3 a. Pulp capping with Ultra-blend at 7 days. Inflammatory cell infiltration and hemorrhage was observed. b. Pulp capping with Ultra-blend at 30 days. Odontoblast-like cells arranged beneath exposure site. Pulp degeneration and partial pulp necrosis was seen. There was no hard tissue formation. c. Pulp capping with Ultra-blend at 90 days. Complete dentinal bridge protected the exposure site.
    Figure 4 a. Pulp capping with Dycal at 7 days. Pulp tissue degeneration was seen. b. Pulp capping with Dycal at 30 days. Partial pulp tissue degeneration and hard tissue formation were observed. c. Pulp capping with Dycal at 90 days. Complete hard tissue formation and normal soft tissue organization beneath the exposure site.

    Figure 1

    Figure 2

    Figure 3

    Figure 4

    Pulp response of beagle dog to direct pulp capping materials: Histological study

    Criteria for grading inflammatory cell response

    Criteria for grading hard tissue formation

    Inflammatory responses and hard tissue formation resulted with 4 pulp capping materials
    Table 1 Criteria for grading inflammatory cell response

    Table 2 Criteria for grading hard tissue formation

    Table 3 Inflammatory responses and hard tissue formation resulted with 4 pulp capping materials

    Table 1

    Table 2

    Table 3

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