Light-cured glass ionomer cement as a bracket adhesive with different types of enamel conditioners.
Eighty bovine incisors were ground on 320-grit silicone carbide paper and cleaned with fluoride-free prophylaxis paste. The enamel surface conditions were: 1. no conditioning; 2. salicylic acid (10%, 10s); 3. benzoic acid (10%, 10s); 4. air polishing with sodium hydrogen carbonate/Prophy-Jet; 5. Prophy-Jet, followed by polyacrylic acid (PAA, 10%, 10 s); 6. PAA, followed by saliva contamination; 7. PAA; 8. phosphoric acid (37%, 10 s). Fuji Ortho II LC (GC) was used as a bracket adhesive in groups 1 t0 7, and in group 8 Concise orthodontic (3M). Stainless steel lingual buttons were placed by hand. Polymerisation with visible light was carried out 20 s from mesial, distal, incisal and gingival. After 24 h storage in tap water at room temperature the shear bond strengths were tested in accordance with ISO specification TC 106/SC/WG16. Mean values of the groups were compared using Student's t-test. Group 7 (PAA) attained the highest mean shear strength (in comparison with control group): 28 MPa. This was both significantly different from the control group (Concise, 33 MPa) and highly significant in comparison with the other groups (< 16 MPa). The shear bond strength of Fuji Ortho II LC on PAA conditioned enamel indicates the clinical applicability of this material.
Süssenberger
U
U
Department of Orofacial Orthopaedics, Humboldt University, Berlin, Germany.
Cacciafesta
V
V
Jost-Brinkmann
P G
PG
D000818:Animals; D002417:Cattle; D001840:Dental Bonding / Q000379:methods; D003743:Dental Enamel / Q000187:drug effects*; D005899:Glass Ionomer Cements / Q000737:chemistry*; D066298:In Vitro Techniques; D007180:Incisor; D008027:Light; D008422:Materials Testing / Q000379:methods; D016910:Orthodontic Brackets; D013314:Stress, Mechanical; D013499:Surface Properties; D013718:Tensile Strength
D005899:Glass Ionomer Cements