FILM THICKNESS USING DIFFERENT INDIRECT LUTING …
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A research was carried out in PubMed database using the following formula: “cement, resin [MeSH Terms]” Introduction Materials and methods Results Conclusion The bond between glass ceramics and resin cements is one of the key factors to long-term clinical success. Intense research activity has brought many contributions to the understanding of ceramic–resin bonding in the past few years. A thin cement thickness and proper bond to the ceramic structure are necessary for improved support and increased fracture resistance of indirect ceramic-restorations. Resin cements appear to maintain the gold standard status with seemingly more advantages than heated composite resin. References Dental restorations are either direct, if a material is placed into a prepared cavity as a soft mass which hardens, or indirect when a solid object is fabricated outside the oral cavity and then cemented in or on a prepared tooth. The latest must be sealed with a luting agent irrespective of fabrication method. Resin cements are one of the luting options and may be classified according to their polymerization mechanisms into light-cured, chemical-cured, and dual-cured. These cements not only provide a strong and durable bonding between indirect restorations and teeth but can also achieve better esthetic outcomes and maintain lower solubility and water sorption in comparison with other non-adhesive options. Adhesive cementation is a critical procedure involving the application of not only the adhesive system and resin luting agent, but also the indirect restoration in place. The effect of resin cement thickness on the durability of the tooth-restoration complex integrity is an important topic and should be thoroughly analyzed. Aim: This literature review aims to scan literature for the importance of film thickness resulting from luting indirect restorations. CHORSHANBAEVA SH 1* , FALACHO RI 2 , GUERRA F 2 1 Aluno do Mestrado Integrado em Medicina Dentária, Faculdade de Medicina, Universidade de Coimbra 2 IÁrea de Reabilitação Oral da Faculdade de Medicina, Universidade de Coimbra FILM THICKNESS USING DIFFERENT INDIRECT LUTING TECHNIQUES 10703 articles Inclusion criteria: - published between 2009-2019 - english and portuguese language - reviews 93 articles Title and summary analysis 41 articles A research was carried out in PubMed database using the following formula: (“heating composite” OR “heated composite”) AND “dentistry” 81 articles Inclusion criteria: - published between 2009-2019 - english and portuguese language Title and summary analysis 36 articles 11 articles Hygroscopic expansion • Less water sorption with thinner film thickness Optical properties – opacity, color stability • Not affected by composite pre- heating • Worse in high filler content resins Ultrasound energy • The use of ultrasound excitation energy before photoactivation optimizes film thickness Flowability • Increased by composite pre- heating until 54ºC • Inversly related with filler particles' amount Marginal infiltration • Increased by higher film thickness which leads to quicker marginal degradation and thus more infiltration Shear resistance • Identical biomechanical behavior for thermo- modified resins and resin based cements Pre-heated composite resin Resin based cement Film thickness Viscosity Marginal adaptation Polymerization shrinkage Film thickness Viscosity Marginal adaptation Polymerization shrinkage The bond strength decreases with an increase of resin cement film thickness. Film thickness has been researched and described as ideal between 5 and 25 µm, not exceeding the 50 µm. Resin cements are recommended materials to use in adhesive cementation considering their physical, mechanical and clinical properties.
Transcript of FILM THICKNESS USING DIFFERENT INDIRECT LUTING …
A research was carried out in PubMed database using the following formula:“cement, resin [MeSH Terms]”
Introduction
Materials and methods
Results
ConclusionThe bond between glass ceramics and resin cements is one of the keyfactors to long-term clinical success. Intense research activity hasbrought many contributions to the understanding of ceramic–resinbonding in the past few years. A thin cement thickness and properbond to the ceramic structure are necessary for improved support andincreased fracture resistance of indirect ceramic-restorations. Resincements appear to maintain the gold standard status with seeminglymore advantages than heated composite resin.
References
Dental restorations are either direct, if a material is placed into a prepared cavity as a soft mass which hardens, or indirect when a solid object is fabricatedoutside the oral cavity and then cemented in or on a prepared tooth. The latest must be sealed with a luting agent irrespective of fabrication method. Resincements are one of the luting options and may be classified according to their polymerization mechanisms into light-cured, chemical-cured, and dual-cured.These cements not only provide a strong and durable bonding between indirect restorations and teeth but can also achieve better esthetic outcomes andmaintain lower solubility and water sorption in comparison with other non-adhesive options. Adhesive cementation is a critical procedure involving theapplication of not only the adhesive system and resin luting agent, but also the indirect restoration in place. The effect of resin cement thickness on the durabilityof the tooth-restoration complex integrity is an important topic and should be thoroughly analyzed.
Aim: This literature review aims to scan literature for the importance of film thickness resulting from luting indirect restorations.
CHORSHANBAEVA SH1*, FALACHO RI2, GUERRA F2
1Aluno do Mestrado Integrado em Medicina Dentária, Faculdade de Medicina, Universidade de Coimbra 2IÁrea de Reabilitação Oral da Faculdade de Medicina, Universidade de Coimbra
FILM THICKNESS USING DIFFERENT INDIRECT LUTINGTECHNIQUES
10703 articlesInclusion criteria:- published between
2009-2019- english and
portuguese language- reviews
93 articles Title and summary
analysis41
articles
A research was carried out in PubMed database using the followingformula: (“heating composite” OR “heated composite”) AND“dentistry”
81 articles
Inclusion criteria:- published between
2009-2019- english and
portuguese language
Title and summary analysis
36 articles
11articles
Hygroscopic expansion
• Less water sorption with thinner film thickness
Optical properties –
opacity, color
stability
• Not affected by composite pre-heating
• Worse in high filler content resins
Ultrasound energy
• The use of ultrasound excitation energy before photoactivation optimizes film thickness
Flowability
• Increased by composite pre-heating until 54ºC
• Inversly related with filler particles' amount
Marginal infiltration
• Increased by higher film thickness which leads to quicker marginal degradation and thus more infiltration
Shear resistance
• Identical biomechanical behavior for thermo-modified resins and resin based cements
Pre-heated composite resin Resin based cement
Film thicknessViscosityMarginal adaptation
Polymerization shrinkageFilm thickness Viscosity Marginal
adaptationPolymerization
shrinkage
The bond strength decreases with an increase of resin cement film
thickness. Film thickness has been researched and described as ideal
between 5 and 25 µm, not exceeding the 50 µm. Resin
cements are recommended materials to use in adhesive
cementation considering their physical, mechanical and
clinical properties.
