Dental materials : official publication of the Academy of Dental Materials · 2025
Impact of immediate versus delayed dentin sealing on adhesive luting effectiveness.
СтатьяНазвание и аннотация: Перевод в очереди
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Ramos Renato Quirino, Mercelis Ben, Ahmed Mohammed H, Dos Santos Bernardo Camargo, Lopes Guilherme Carpena, Van Meerbeek Bart, Peumans Marleen
Аннотация
OBJECTIVE: To evaluate the effect of immediate versus delayed dentin sealing (IDS/DDS) on the micro-tensile bond strength (µTBS) of CAD/CAM composite adhesively luted onto dentin.
METHODS: Upon sandblasting, silanization and adhesive application, CAD/CAM composite slabs were luted (AL) onto dentin using composite following eight protocols: 1'DDSLC': C-SE2 light-cured (LC) on dentin prior to AL; 2'DDSprov': temporary, saliva storage, C-SE2 LC, AL; 3'DDSnoLC': C-SE2 (non-LC), AL; 4'DDSpulpless_noLC': 'DDSnoLC' with the pulp chamber filled with composite (non-vital tooth); 5'IDSctrl': C-SE2 LC, flowable composite, sandblasting, etching, C-SE2 (non-LC), AL; 6'IDSsal': 'IDSctrl' but saliva storage before AL; 7'IDSwat': 'IDSnon_contaminated' but water storage before AL; 8'IDSprov': 'IDSctrl' but IDS covered with temporary, saliva storage before AL. After one-week water immersion, half of the specimens were cut for immediate µTBS testing and the other half submitted to 1,200,000 chewing cycles, cut into µ-specimens and submitted to 10,000 thermal cycles prior to µTBS testing. Linear mixed-effects statistics were applied (α = 0.05).
RESULTS: All four IDS and the two DDS approaches that involved separate adhesive light-curing, resulted in reliable immediate and aging-resistant bonding effectiveness to dentin. Using DDS, all µ-specimens failed prior to testing when the adhesive was not separately light-cured prior to luting onto vital dentin. When luted onto non-vital dentin, significantly higher µTBS was recorded that nevertheless remained significantly below that measured for the four IDS and two DDS approaches.
CONCLUSION: No difference in adhesive luting effectiveness was recorded between IDS and DDS when the adhesive was separately light-cured at the dentin side prior to luting.
METHODS: Upon sandblasting, silanization and adhesive application, CAD/CAM composite slabs were luted (AL) onto dentin using composite following eight protocols: 1'DDSLC': C-SE2 light-cured (LC) on dentin prior to AL; 2'DDSprov': temporary, saliva storage, C-SE2 LC, AL; 3'DDSnoLC': C-SE2 (non-LC), AL; 4'DDSpulpless_noLC': 'DDSnoLC' with the pulp chamber filled with composite (non-vital tooth); 5'IDSctrl': C-SE2 LC, flowable composite, sandblasting, etching, C-SE2 (non-LC), AL; 6'IDSsal': 'IDSctrl' but saliva storage before AL; 7'IDSwat': 'IDSnon_contaminated' but water storage before AL; 8'IDSprov': 'IDSctrl' but IDS covered with temporary, saliva storage before AL. After one-week water immersion, half of the specimens were cut for immediate µTBS testing and the other half submitted to 1,200,000 chewing cycles, cut into µ-specimens and submitted to 10,000 thermal cycles prior to µTBS testing. Linear mixed-effects statistics were applied (α = 0.05).
RESULTS: All four IDS and the two DDS approaches that involved separate adhesive light-curing, resulted in reliable immediate and aging-resistant bonding effectiveness to dentin. Using DDS, all µ-specimens failed prior to testing when the adhesive was not separately light-cured prior to luting onto vital dentin. When luted onto non-vital dentin, significantly higher µTBS was recorded that nevertheless remained significantly below that measured for the four IDS and two DDS approaches.
CONCLUSION: No difference in adhesive luting effectiveness was recorded between IDS and DDS when the adhesive was separately light-cured at the dentin side prior to luting.