An ex vivo assessment of a resin-modified glass ionomer cement in relation to bonding technique.
OBJECTIVE
This study assessed a resin modified glass ionomer bonding system, Fuji ortho L.C. using different bonding techniques and compared it with a composite control (Transbond).


METHODS
Ex vivo study. Twenty extracted premolar teeth in each group were bonded as follows: (i) Group 1 Control (Transbond); (ii) Group 2 Fuji ortho L.C. without an etch procedure/wet enamel surface; (iii) Group 3 Fuji ortho L.C. without an etch procedure/dry enamel surface; (iv) Group 4 Fuji ortho L.C. using a conventional acid etch technique.


RESULTS
Shear bond strength, site of bond failure and adhesive remnant index.


RESULTS
Brackets bonded as recommended by the manufacturer (Group 2) have significantly (p < 0.001) lower bond strengths compared with the control (Group 1). Bonding with an etch technique (Group 4) will significantly (p < 0.001) increase the bond strength compared with the other Fuji groups. All the Fuji groups tended to fail at the enamel/resin interface with lower ARI scores compared with the control.


CONCLUSIONS
The lower bond strength of Fuji ortho L.C. would limit its use as a routine bonding agent. When bonded with an acid etch technique, the bond strength may be sufficient for low loading situations such as the upper anterior teeth.
Larmour
C J
CJ
Department of Orthodontics, Dundee Dental School, Park Place, Dundee DD1 4HR, UK.
Stirrups
D R
DR
D000134:Acid Etching, Dental; D000180:Acrylic Resins; D000538:Aluminum Silicates; D000704:Analysis of Variance; D017438:Bisphenol A-Glycidyl Methacrylate; D016009:Chi-Square Distribution; D001840:Dental Bonding / Q000379:methods*; D017220:Dentin-Bonding Agents; D005899:Glass Ionomer Cements; D006801:Humans; D008422:Materials Testing; D016910:Orthodontic Brackets; D019279:Resin Cements; D018709:Statistics, Nonparametric; D016019:Survival Analysis; D013718:Tensile Strength
D000180:Acrylic Resins; D000538:Aluminum Silicates; D017220:Dentin-Bonding Agents; C095451:Fuji Ortho LC; D005899:Glass Ionomer Cements; D019279:Resin Cements; C065742:Transbond; D017438:Bisphenol A-Glycidyl Methacrylate