The adhesion between fiber posts and root canal walls: comparison between microtensile and push‐out bond strength measurements

European Journal of Oral Sciences - Tập 112 Số 4 - Trang 353-361 - 2004
Cecilia Goracci1, Andréa Tavares2, Andrea Fabianelli3, Francesca Monticelli3, Ornella Raffaelli3, Paulo Eduardo Capel Cardoso2, Franklin R. Tay4, Marco Ferrari3
1Department of Dental Materials, University of Siena, Siena, Italy
2Universidade de Sao Paulo#TAB#
3University of Siena
4The University of Hong Kong

Tóm tắt

Aim of the study was to compare the trimming and non‐trimming variants of the microtensile technique with the ‘micro’ push‐out test in the ability to measure accurately the bond strength of fiber posts luted inside root canals. In 15 endodontically treated teeth (Group A), fiber posts were cemented with Excite DSC in combination with Variolink II (Ivoclar‐Vivadent). In 15 roots RelyX Unicem (3M‐ESPE) was used for fiber post luting (Group B). Within each group, the bond strength of cemented fiber posts was assessed with the trimming and non‐trimming microtensile technique, as well as with the push‐out test. The great number of premature failures (16.9% in Group A, 27.5% in Group B) and the finding of high standard deviation values make questionable the reliability of the trimming microtensile technique. With the non‐trimming microtensile technique, only five sticks were obtained from a total of six roots. The remaining specimens failed prematurely during the cutting phase. With the push‐out test no premature failure occurred, the variability of the data distribution was acceptable, and regional differences in bond strength among root levels could be assessed. Relatively low values of bond strength were, in general, recorded for luted fiber posts. In conclusion, when measuring the bond strength of luted fiber posts, the push‐out test appears to be more dependable than the microtensile technique.

Từ khóa


Tài liệu tham khảo

10.1097/00004770-200112000-00010

10.1016/S0109-5641(02)00030-1

Ferrari M, 2000, Bonding to root canal: structural characteristics of the substrate, Am J Dent, 13, 255

10.1016/S0109-5641(00)00102-0

Nikaido T, 1999, Bond strengths to endodontically treated teeth, Am J Dent, 12, 177

Drummond JL, 2000, In vitro evaluation of endodontic posts, Am J Dent, 13, 5B

10.1016/0109-5641(94)90046-9

Qualthrough AJ, 2003, A comparison of the retention of tooth‐colored posts, Quint Int, 34, 199

10.1067/mpr.2003.84

10.1111/j.1365-2591.1996.tb01379.x

Prisco D, 2003, Fiber post adhesion to resin luting cements in the restoration of endodontically treated teeth, Oper Dent, 28, 515

10.1111/j.1600-9657.1996.tb00520.x

10.1016/S0109-5641(02)00003-9

10.1111/j.1532-849X.2002.00025.x

Sudsangiam S, 1999, Do dentin bond strength tests serve a useful purpose?, J Adhes Dent, 1, 57

10.1097/00004770-200106000-00011

Pashley DH, 1999, The microtensile bond test: a review, J Adhes Dent, 1, 299

10.1097/00004770-200105000-00001

10.1097/00004770-200304000-00004

Mannocci F, 2001, Microtensile bond strength and confocal microscopy of dental adhesives bonded to root canal dentin, Am J Dent, 14, 200

GoracciC FerrariM GrandiniS MonticelliF TayFR.Bonding of a self‐adhesive resin cement to dental hard tissues.J Adhes Dent in press.

GoracciC SadekFT MonticelliF CardosoPEC FerrariM.Influence of substrate shape and thickness on microtensile specimens' structural integrity and their measured bond strength.Dent Mater in press.

Thông tin
Thông tin xuất bản

European Journal of Oral Sciences

Tập 112 Số 4

353-361

Thông tin tác giả