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Microleakage of endodontically treated teeth with different dowel systems.
J Prosthet Dent. 2004 Aug; 92(2):163-9.JP

Abstract

STATEMENT OF PROBLEM

Several new esthetic dowel systems are available for the restoration of endodontically treated teeth, but little is known about how effectively these dowels seal the restored teeth.

PURPOSE

The purpose of this in vitro study was to compare microleakage of 3 esthetic, adhesively luted dowel systems with a conventional dowel system.

MATERIAL AND METHODS

The root canals of 41 human intact single-rooted extracted teeth were prepared using a step-back technique. The teeth were randomly divided into 4 experimental groups (n=10), and 1 tooth served as a positive control. The decoronated roots were obturated with gutta-percha using lateral condensation. Roots were restored with 1 of the following dowel systems according to the manufacturer's instructions: (1) stainless steel dowels (ParaPost), (2) glass fiber dowels (Snowpost), (3) resin-supported polyethylene fiber (Ribbond) dowels, or (4) zirconia dowels (Cosmopost). Using a fluid filtration method, coronal leakage of the specimens along the dowel space and root canal restorative material was measured. Fluid movement measurements were made at 2-minute intervals for 8 minutes to measure the presence of voids existing in the obturated canals, at 1 week, 3 months, and 6 months following dowel insertion. A repeated-measures analysis of variance (ANOVA) was used to analyze logarithmic transformations of data (time and dowel material) for significant differences. The Tukey HSD test and paired 2-tailed tests were used to perform multiple comparisons (alpha=.05).

RESULTS

The data indicated that the leakage values varied according to the dowel system used (P<.01). There was significant interaction between dowel systems and time of testing (P<.01). The sealing ability of zirconia dowels decreased over time (P<.01), but sealing abilities of stainless steel and resin-supported polyethylene fiber dowels remained constant (P>.05). The sealing ability of glass fiber dowels increased at 3 months (P=.032) and remained constant over the next 3 months (P=.758). Statistically, resin-supported polyethylene fiber and glass fiber dowels showed the lowest coronal leakage when compared with stainless steel and zirconia dowels at all time periods (P<.01). There were no significant differences between resin-supported polyethylene fiber and glass fiber dowels at any time period. The initial leakage measurement in zirconia dowel and stainless steel dowels were similar (P=.914), but became significantly different at 3 and 6 months (P<.01).

CONCLUSION

Resin-supported polyethylene fiber dowels and glass fiber dowels tested exhibited less microleakage compared to zirconia dowel systems. The latter system should be further evaluated because of its unacceptable level of leakage.

Authors+Show Affiliations

Department of Prosthodontics, Faculty of Dentistry, University of Selcuk, Konya, Turkey. asli_u@hotmail.comNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Clinical Trial
Comparative Study
Journal Article
Randomized Controlled Trial

Language

eng

PubMed ID

15295326

Citation

Usumez, Aslihan, et al. "Microleakage of Endodontically Treated Teeth With Different Dowel Systems." The Journal of Prosthetic Dentistry, vol. 92, no. 2, 2004, pp. 163-9.
Usumez A, Cobankara FK, Ozturk N, et al. Microleakage of endodontically treated teeth with different dowel systems. J Prosthet Dent. 2004;92(2):163-9.
Usumez, A., Cobankara, F. K., Ozturk, N., Eskitascioglu, G., & Belli, S. (2004). Microleakage of endodontically treated teeth with different dowel systems. The Journal of Prosthetic Dentistry, 92(2), 163-9.
Usumez A, et al. Microleakage of Endodontically Treated Teeth With Different Dowel Systems. J Prosthet Dent. 2004;92(2):163-9. PubMed PMID: 15295326.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Microleakage of endodontically treated teeth with different dowel systems. AU - Usumez,Aslihan, AU - Cobankara,Funda Kont, AU - Ozturk,Nilgun, AU - Eskitascioglu,Gurcan, AU - Belli,Sema, PY - 2004/8/6/pubmed PY - 2004/9/24/medline PY - 2004/8/6/entrez SP - 163 EP - 9 JF - The Journal of prosthetic dentistry JO - J Prosthet Dent VL - 92 IS - 2 N2 - STATEMENT OF PROBLEM: Several new esthetic dowel systems are available for the restoration of endodontically treated teeth, but little is known about how effectively these dowels seal the restored teeth. PURPOSE: The purpose of this in vitro study was to compare microleakage of 3 esthetic, adhesively luted dowel systems with a conventional dowel system. MATERIAL AND METHODS: The root canals of 41 human intact single-rooted extracted teeth were prepared using a step-back technique. The teeth were randomly divided into 4 experimental groups (n=10), and 1 tooth served as a positive control. The decoronated roots were obturated with gutta-percha using lateral condensation. Roots were restored with 1 of the following dowel systems according to the manufacturer's instructions: (1) stainless steel dowels (ParaPost), (2) glass fiber dowels (Snowpost), (3) resin-supported polyethylene fiber (Ribbond) dowels, or (4) zirconia dowels (Cosmopost). Using a fluid filtration method, coronal leakage of the specimens along the dowel space and root canal restorative material was measured. Fluid movement measurements were made at 2-minute intervals for 8 minutes to measure the presence of voids existing in the obturated canals, at 1 week, 3 months, and 6 months following dowel insertion. A repeated-measures analysis of variance (ANOVA) was used to analyze logarithmic transformations of data (time and dowel material) for significant differences. The Tukey HSD test and paired 2-tailed tests were used to perform multiple comparisons (alpha=.05). RESULTS: The data indicated that the leakage values varied according to the dowel system used (P<.01). There was significant interaction between dowel systems and time of testing (P<.01). The sealing ability of zirconia dowels decreased over time (P<.01), but sealing abilities of stainless steel and resin-supported polyethylene fiber dowels remained constant (P>.05). The sealing ability of glass fiber dowels increased at 3 months (P=.032) and remained constant over the next 3 months (P=.758). Statistically, resin-supported polyethylene fiber and glass fiber dowels showed the lowest coronal leakage when compared with stainless steel and zirconia dowels at all time periods (P<.01). There were no significant differences between resin-supported polyethylene fiber and glass fiber dowels at any time period. The initial leakage measurement in zirconia dowel and stainless steel dowels were similar (P=.914), but became significantly different at 3 and 6 months (P<.01). CONCLUSION: Resin-supported polyethylene fiber dowels and glass fiber dowels tested exhibited less microleakage compared to zirconia dowel systems. The latter system should be further evaluated because of its unacceptable level of leakage. SN - 0022-3913 UR - https://www.unboundmedicine.com/medline/citation/15295326/Microleakage_of_endodontically_treated_teeth_with_different_dowel_systems_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0022391304002811 DB - PRIME DP - Unbound Medicine ER -