Abstract
Purpose: To compare the removal of smear layer and the structure of the hybrid layer formed after the use of EDTA or MTAD solutions when used as a final flush. Methods: Single-rooted extracted premolars (n=18) were collected and treated for root canal therapy using NaOCl irrigation followed by a final rinse of 17% EDTA, Biopure MTAD, or saline (negative control). The roots were obturated with gutta-percha and a hydrophilic HEMA-containing root canal sealer. The TEM specimens were impregnated with 50% silver nitrate to visualize sealing imperfections and nanoleakage. The structure of the coronal, middle and apical parts of root canal walls was examined using transmission electron microscopy. Results: After NaOCl irrigation, a final rinse with BioPure MTAD or 17% EDTA completely removed the 2 μm-thick smear layer on mechanically instrumented root canal walls. The BioPure MTAD hybrid layer was thicker than the 17% EDTA hybrid layer. Both the BioPure MTAD and EDTA caused a collapse of the dentin matrix structure which impeded sealer infiltration and the formation of high quality hybrid layer bonding. The hybrid layers created in smear layer-covered dentin exhibited less potential for nanoleakage than the MTAD or EDTA hybrid layers.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 281-290 |
| Number of pages | 10 |
| Journal | American Journal of Dentistry |
| Volume | 18 |
| Issue number | 4 |
| State | Published - Aug 1 2005 |
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ASJC Scopus subject areas
- Dentistry(all)
Cite this
Application of biologically-oriented dentin bonding principles to the use of endodontic irrigants. / García-Godoy, Franklin; Loushine, Robert J.; Itthagarun, Anut; Weller, R. Norman; Murray, Peter E.; Feilzer, Albert J.; Pashley, David H.; Tay, Franklin Chi Meng.
In: American Journal of Dentistry, Vol. 18, No. 4, 01.08.2005, p. 281-290.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Application of biologically-oriented dentin bonding principles to the use of endodontic irrigants
AU - García-Godoy, Franklin
AU - Loushine, Robert J.
AU - Itthagarun, Anut
AU - Weller, R. Norman
AU - Murray, Peter E.
AU - Feilzer, Albert J.
AU - Pashley, David H.
AU - Tay, Franklin Chi Meng
PY - 2005/8/1
Y1 - 2005/8/1
N2 - Purpose: To compare the removal of smear layer and the structure of the hybrid layer formed after the use of EDTA or MTAD solutions when used as a final flush. Methods: Single-rooted extracted premolars (n=18) were collected and treated for root canal therapy using NaOCl irrigation followed by a final rinse of 17% EDTA, Biopure MTAD, or saline (negative control). The roots were obturated with gutta-percha and a hydrophilic HEMA-containing root canal sealer. The TEM specimens were impregnated with 50% silver nitrate to visualize sealing imperfections and nanoleakage. The structure of the coronal, middle and apical parts of root canal walls was examined using transmission electron microscopy. Results: After NaOCl irrigation, a final rinse with BioPure MTAD or 17% EDTA completely removed the 2 μm-thick smear layer on mechanically instrumented root canal walls. The BioPure MTAD hybrid layer was thicker than the 17% EDTA hybrid layer. Both the BioPure MTAD and EDTA caused a collapse of the dentin matrix structure which impeded sealer infiltration and the formation of high quality hybrid layer bonding. The hybrid layers created in smear layer-covered dentin exhibited less potential for nanoleakage than the MTAD or EDTA hybrid layers.
AB - Purpose: To compare the removal of smear layer and the structure of the hybrid layer formed after the use of EDTA or MTAD solutions when used as a final flush. Methods: Single-rooted extracted premolars (n=18) were collected and treated for root canal therapy using NaOCl irrigation followed by a final rinse of 17% EDTA, Biopure MTAD, or saline (negative control). The roots were obturated with gutta-percha and a hydrophilic HEMA-containing root canal sealer. The TEM specimens were impregnated with 50% silver nitrate to visualize sealing imperfections and nanoleakage. The structure of the coronal, middle and apical parts of root canal walls was examined using transmission electron microscopy. Results: After NaOCl irrigation, a final rinse with BioPure MTAD or 17% EDTA completely removed the 2 μm-thick smear layer on mechanically instrumented root canal walls. The BioPure MTAD hybrid layer was thicker than the 17% EDTA hybrid layer. Both the BioPure MTAD and EDTA caused a collapse of the dentin matrix structure which impeded sealer infiltration and the formation of high quality hybrid layer bonding. The hybrid layers created in smear layer-covered dentin exhibited less potential for nanoleakage than the MTAD or EDTA hybrid layers.
UR - http://www.scopus.com/inward/record.url?scp=26944468711&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=26944468711&partnerID=8YFLogxK
M3 - Article
C2 - 16296438
AN - SCOPUS:26944468711
VL - 18
SP - 281
EP - 290
JO - American Journal of Dentistry
JF - American Journal of Dentistry
SN - 0894-8275
IS - 4
ER -