The effect of several dentin desensitizers on shear bond strength of adhesive resin luting cement using self-etching primer.
OBJECTIVE
Dentin desensitizers can inhibit the bonding between dentin and resin cements. This study examined the effect of the previous application of desensitizers on the shear bond strength of one resin cement using self-etching primer to dentin.


METHODS
One hundred and twenty-five dentin exposed teeth were randomly assigned to four experimental groups and one control group of 25 teeth each. Four dentin desensitizers were applied to the four experimental groups, respectively. The dentin desensitizers used were SuperSeal (Phoenix Dental, Inc., USA), MS-Coat (Sun Medical Co. Ltd, Japan), Gluma (Heraeus Kulzer, Germany), and Copalite Varnish (Cooley & Cooley Ltd, USA). Panavia F (Kuraray Co. Ltd, Tokyo, Japan) was attached to the top of each experimental and control group teeth using an Ultradent testing jig (Ultradent Product, Inc., Utah, USA), and the shear bond strength was measured using a Universal testing machine (Model 6022, Instron Co., Canton, MA, USA). The tooth surface was examined by scanning electron microscopy (SEM, JSM-T2000, JEOL, Tokyo, Japan).


RESULTS
The control group showed the greatest shear bond strength (14.74 MPa) followed by SuperSeal (12.33 MPa), Gluma (5.28 MPa), MS-Coat (4.44 MPa) and Copalite Varnishtrade mark (3.14 MPa). There was no significant difference in shear bond strength between the control group and the experimental group treated with Superseal. The shear bond strength in the other experimental groups treated with Gluma, Varnish, and MS-Coat was similar to each other but significantly lower than control or Superseal. SEM showed revealed resin tags in most of the dentinal tubules in the experimental group treated with the Superseal.


CONCLUSIONS
Among the four dentin desensitizers, Superseal was the only one that did not interfere with the process of resin bonding. The other dentin desensitizers that contained a resin ingredient interfered with resin retention.
Huh
Jung-Bo
JB
Department of Prodthodontics, Yonsei University College of Dentistry, 134 Sinchon-dong, Seodaemum-gu, Seoul 120-752, Republic of Korea.
Kim
Jee-Hwan
JH
Chung
Moon-Kyu
MK
Lee
Ho-Yong
HY
Choi
Yong-Geun
YG
Shim
June-Sung
JS
D001840:Dental Bonding; D003804:Dentin / Q000187:drug effects / Q000648:ultrastructure*; D003807:Dentin Sensitivity / Q000188:drug therapy*; D017220:Dentin-Bonding Agents / Q000737:chemistry*; D005976:Glutaral / Q000737:chemistry; D006801:Humans; D008422:Materials Testing; D008689:Methacrylates / Q000737:chemistry; D008855:Microscopy, Electron, Scanning; D010070:Oxalates / Q000737:chemistry; D019815:Oxalic Acid / Q000737:chemistry; D019279:Resin Cements / Q000737:chemistry*; D012116:Resins, Plant / Q000737:chemistry; D033081:Shear Strength; D013314:Stress, Mechanical; D013499:Surface Properties
D017220:Dentin-Bonding Agents; D008689:Methacrylates; D010070:Oxalates; C121034:Pain-Free; C438843:Panavia-Fluoro; D019279:Resin Cements; D012116:Resins, Plant; C474198:SuperSeal; C111486:gluma desensitizer; C023806:Copalite; D019815:Oxalic Acid; D005976:Glutaral