TY - JOUR
T1 - The influence of dentin and/or metal surface treatment on the retention of cemented crowns in teeth with an increased taper
AU - Pilo, Raphael
AU - Lewinstein, Israel
AU - Ratzon, Tal
AU - Cardash, Harold S.
AU - Brosh, Tamar
PY - 2008/8
Y1 - 2008/8
N2 - Objectives: To evaluate the effect of dentin and/or metal surface treatments on retention of cast crowns cemented to preparations with compromised retention. Methods: Cast crowns (n = 105) were fabricated on extracted molars prepared to 40° convergence and standard height. 60 teeth were randomly divided into: (A) cemented with zinc phosphate cement; (B-D) cemented with resin cement (Compolute, 3M) with either no surface treatment (B), dentin etched and bonded (EBS multi, 3M) (C), or dentin etched and bonded, and metal tribochemically treated (Co-Jet, 3M) (D); 45 teeth were randomly divided and crowns cemented with another resin cement (Rely-X Arc, 3M) with either no surface treatment (E), dentin etched and bonded (Single Bond, 3M) (F), or dentin etched and bonded and metal tribochemically treated (G). Teeth were stored in 100% humidity for 3 months and thermocycled 5000 cycles. Crowns were dislodged from the preparations and retention (MPa) was calculated. Results: Group D showed significantly higher retention (3.52 ± 1.3 MPa) compared to Group C (2.26 ± 0.9 MPa), Group B (0.85 ± 0.4 MPa), and Group A (1.22 ± 0.4 MPa). Group G exhibited significantly higher retention (5.4 ± 1.4 MPa) compared to F (2.6 ± 1.2 MPa) and E (2.0 ± 0.6 MPa). Higher retention corresponded with more cohesive cement type of failure. Significance: Cast crowns with compromised retention cemented by resin cement should undergo combined tribochemical metal treatment and dentin bonding. The crucial link is the interaction of different brands of resin cements with the metal tribochemically treated.
AB - Objectives: To evaluate the effect of dentin and/or metal surface treatments on retention of cast crowns cemented to preparations with compromised retention. Methods: Cast crowns (n = 105) were fabricated on extracted molars prepared to 40° convergence and standard height. 60 teeth were randomly divided into: (A) cemented with zinc phosphate cement; (B-D) cemented with resin cement (Compolute, 3M) with either no surface treatment (B), dentin etched and bonded (EBS multi, 3M) (C), or dentin etched and bonded, and metal tribochemically treated (Co-Jet, 3M) (D); 45 teeth were randomly divided and crowns cemented with another resin cement (Rely-X Arc, 3M) with either no surface treatment (E), dentin etched and bonded (Single Bond, 3M) (F), or dentin etched and bonded and metal tribochemically treated (G). Teeth were stored in 100% humidity for 3 months and thermocycled 5000 cycles. Crowns were dislodged from the preparations and retention (MPa) was calculated. Results: Group D showed significantly higher retention (3.52 ± 1.3 MPa) compared to Group C (2.26 ± 0.9 MPa), Group B (0.85 ± 0.4 MPa), and Group A (1.22 ± 0.4 MPa). Group G exhibited significantly higher retention (5.4 ± 1.4 MPa) compared to F (2.6 ± 1.2 MPa) and E (2.0 ± 0.6 MPa). Higher retention corresponded with more cohesive cement type of failure. Significance: Cast crowns with compromised retention cemented by resin cement should undergo combined tribochemical metal treatment and dentin bonding. The crucial link is the interaction of different brands of resin cements with the metal tribochemically treated.
KW - Bonding
KW - Cast crown
KW - Dentin
KW - Metal
KW - Tribochemical treatment
UR - http://www.scopus.com/inward/record.url?scp=45049088829&partnerID=8YFLogxK
U2 - 10.1016/j.dental.2007.12.002
DO - 10.1016/j.dental.2007.12.002
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AN - SCOPUS:45049088829
SN - 0109-5641
VL - 24
SP - 1058
EP - 1064
JO - Dental Materials
JF - Dental Materials
IS - 8
ER -