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LETTER TO EDITOR
Year : 2012  |  Volume : 2  |  Issue : 1  |  Page : 50

Sealing ability of root canal sealers


Department of Conservative Dentistry and Endodontics, Manipal College of Dental Sciences, Manipal University, Manipal, Karnataka, India

Date of Web Publication10-Dec-2012

Correspondence Address:
Vasudev Ballal
Department of Conservative Dentistry and Endodontics, Manipal College of Dental Sciences, Manipal University, Manipal 576 104, Karnataka
India
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Source of Support: None, Conflict of Interest: None


DOI: 10.4103/1658-5984.104424

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How to cite this article:
Ballal V. Sealing ability of root canal sealers. Saudi Endod J 2012;2:50

How to cite this URL:
Ballal V. Sealing ability of root canal sealers. Saudi Endod J [serial online] 2012 [cited 2019 Dec 8];2:50. Available from: http://www.saudiendodj.com/text.asp?2012/2/1/50/104424

Sir,

I read with great interest the article entitled "A comparison of sealing ability of four sealer cements in apically perforated root canals" by Iqbal et al. which has been published in your esteemed journal (Saudi Endodontic Journal 2011;1(1);12-8). I want to share a few of my thoughts regarding this article. It was a good study comparing the apical sealing ability of four different sealers in apically perforated root canals. However, the authors can further redefine the study by incorporating few parameters. First, the length of the teeth should have been standardized. Since the dye leakage is measured from the apex to the coronal aspect of the teeth, the length of all the specimens should be equal to prevent any bias while measuring the leakage of the dye. Second, after shaping and cleaning the root canals, a final flush with 17% EDTA should have been performed to remove the smear layer. It has been reported that, presence of smear layer inhibits the penetration of sealers into dentinal tubules thus compromising the seal. [1],[2] Third, dye leakage studies can be conducted under vacuum pressure, since the validity of dye leakage studies has been questioned because of the possible effect of entrapped air on the ingress of the dye solution. [3] It has been reported that, vacuum pressure decreases the volume of entrapped air and allows complete dye penetration. [4] Fourth, ultrasonic file could have been used for the uniform placement of the sealer into the root canals rather than using a hand file. [5] Fifth, post obturation radiographs should have been taken mesiodistally and buccolingually of each specimen to assess the homogeneity, density and apical extent of the root filling. Hence, authors can perform further similar studies using the above mentioned parameters for the better appreciation of the results.

 
  References Top

1.Orstavik D, Haapasalo M. Disinfection by endodontic irrigants and dressings of experimentally infected dentinal tubules. Endod Dent Traumatol 1990;6:142-9.  Back to cited text no. 1
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2.Foster KH, Kulild JC, Weller RN. Effect of smear layer removal on the diffusion of calcium hydroxide through radicular dentin. J Endod 1993;19:136-40.  Back to cited text no. 2
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3.Spradling PM, Senia ES. The relative sealing ability of paste-type filling materials. J Endod 1982;8:543-9.  Back to cited text no. 3
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4.Oliver CM, Abbott PV. Entrapped air and its effects on dye penetration of voids. Endod Dent Traumatol 1991;7:135-8.  Back to cited text no. 4
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5.Jeffrey IW, Saunders WP, Thomas GE. An investigation into the movement of sealer during placement of gutta-percha points. Int Endod J 1986;19:21-8.  Back to cited text no. 5
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