Effect of GLUMA desensitizer on the retention of full metal crowns cemented with Rely X U200 self-adhesive cement.
OBJECTIVE
Considering the importance of retention in the success and long-term clinical service of fixed partial dentures (FPDs) as well as the existing controversy regarding the effect of GLUMA desensitizer on the retention of full metal crowns cemented with RelyX U200 self-adhesive cement, this study aimed to assess the effect of GLUMA desensitizer on the retention of full metal crowns cemented using RelyX U200.


METHODS
In this experimental study, 20 sound human premolars were prepared; a 0.5 mm chamfer finish line was prepared above the cementoenamel junction. The teeth were randomly assigned to two groups: a desensitizer group (n = 10, treated with GLUMA desensitizer) and a control (n = 10, no surface treatment). Full metal crowns were fabricated of base metal alloy and had a ring. All crowns were cemented with RelyX U200 and subjected to retention test by using a universal testing machine. The data were analyzed using SPSS version 20 and independent t-test.


RESULTS
The mean tensile bond strength was significantly higher in the GLUMA desensitizer group (230.63 ± 63.8 N) compared to the control group (164.45 ± 39.3 N) (P≤.012).


CONCLUSIONS
GLUMA desensitizer increases the tensile bond strength of RelyX U200 self-adhesive cement to dentin.
Prosthodontics Department. Islamic Azad University-Dental Branch, Teheran, Iran.
Shirin
S
Lawaf
Prosthodontics Department. Islamic Azad University-Dental Branch, Teheran, Iran.
Ezatallah
E
Jalalian
Prosthodontics Department. Islamic Azad University-Dental Branch, Teheran, Iran.
Roshanak
R
Roshan
Oral Medicine Department. Islamic Azad University-Dental Branch, Teheran, Iran.
Arash
0000-0001-9219-1219
A
Azizi
Crowns; Gluma desensitizer; Retention; Self-adhesive cement