Methacrylate- and silorane-based composite restorations: Hardness, depth of cure and interfacial gap formation as a function of the energy dose

Background: Repair bonding to lithium disilicate ceramic (LDS) remains an issue. This study examined whether the adaptation of a resin composite to LDS can be improved by a silane pretreatment and warm air-drying. Methods: LDS blocks (IPS e.max CAD) with prefabricated tapered cavities were bonded using a silane-containing universal adhesive (Clearfil Universal Bond Quick ER; UBQ) or the bonding agent of a two-step self-etch adhesive (Clearfil SE Bond 2), with and without a silane pretreatment (Clearfil Ceramic Primer; CP). CP and the adhesives were air-dried with normal air (23 ± 1 °C) or warm air (60 ± 5 °C), light-cured, and the cavities were filled with a flowable composite. Interfacial gap formation was evaluated using swept-source optical coherence tomography immediately after filling, after 24 h, 5000 and 10,000 thermal cycles, and an additional 1 year of water storage. Results: Without the silane pretreatment, all specimens soon detached from the cavities. Warm air-drying significantly decreased gap formation compared to normal air-dried groups (p < 0.001) and improved long-term stability (p < 0.001). The lowest gap formation was observed with UBQ when the silane pretreatment was combined with warm air-drying. Conclusions: Composite adaptation to LDS was insufficient without silanization, but it was stable in the long term if the silane pretreatment and warm air-drying were combined.

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Interfacial integrity of bonded restorations with self-etching adhesives: Water storage and thermo-mechanical cycling

European Journal of Dentistry ◽

10.1055/s-0039-1698947 ◽

2012 ◽

Vol 06 (02) ◽

pp. 169-177

Author(s):

Gislaine Cristine Martins ◽

Alfonso Sánchez-Ayala ◽

Paulo Henrique Perlatti D’Alpino ◽

Abraham Lincoln Calixto ◽

João Carlos Gomes ◽

...

Keyword(s):

Bond Strength ◽

Water Storage ◽

Single Bond ◽

Third Molars ◽

Class V ◽

Mean Values ◽

Composite Restorations ◽

Mechanical Cycling ◽

Interfacial Gap ◽

Made In

ABSTRACTObjectives: Objective: To evaluate the effect of thermo-mechanical cycling (TMC) on the microleakage (μL) and axial gap width (AG) of Class V bonded restorations in premolars using self-etching adhesive systems. The bond strength of composite restorations to dentin (μTBS) using the same adhesives was also evaluated in third molars after water storage: 24 h and 6 months. The research hypotheses were tested for the results of two self-etching adhesives in comparison when a conventional two-step adhesive was used: (1) the μL and AG would be lower, regardless of TMC; (2) the μTBS of self-etching adhesives would be higher, irrespective of evaluation times.Methods: Sixty Class V composite restorations were made in 30 premolars and bonded with Adper Single Bond 2 (ASB2), AdheSE (ASE), and Adper Prompt L-Pop (APL-P) (n=20). Dentin μL and AG were immediately measured for half of the sample. The other half was evaluated after TMC. Eighteen third molars were also selected and bonded using the same adhesives to test the μTBS to dentin. Specimens were evaluated after 24 h and 6 months of water storage.Results: No differences in μL and AG were found among the groups (P>.05). The μTBS mean values were: ASB2>ASE>APL-P (P<.05); only Adper Single Bond 2 presented a significantly lower μTBS after water storage (P<.05)Conclusions: The bonding approach does not influence the microleakage and interfacial gap extension. Despite the decrease in the mean values, the bond strength to dentin of the conventional, two-step adhesive remains high after 6 months of water storage. (Eur J Dent 2012;6:169-177)

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Effect of Thermocycling on Interfacial Gap-formation in Class V Cavities and Mechanical Properties of Spherical Silica Filler Addition to Resin-modified Glass Ionomer Restorations

Dental Materials Journal ◽

10.4012/dmj.25.655 ◽

2006 ◽

Vol 25 (4) ◽

pp. 655-663 ◽

Cited By ~ 2

Author(s):

Kenji HATANAKA ◽

Masao IRIE ◽

Rosalina TJANDRAWINATA ◽

Kazuomi SUZUKI

Keyword(s):

Mechanical Properties ◽

Glass Ionomer ◽

Gap Formation ◽

Class V ◽

Silica Filler ◽

Spherical Silica ◽

Resin Modified Glass Ionomer ◽

Interfacial Gap

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Class II Composite Restorations and Proximal Concavities: Clinical Implications and Management

Operative Dentistry ◽

10.2341/11-224-t ◽

2013 ◽

Vol 38 (2) ◽

pp. 119-124 ◽

Cited By ~ 2

Author(s):

M Patras ◽

S Doukoudakis

Keyword(s):

Clinical Experience ◽

Class Ii ◽

Clinical Implications ◽

Gap Formation ◽

Posterior Teeth ◽

Composite Restorations ◽

The Matrix ◽

Adequate Design

SUMMARY Clinical experience supports the notion that the restoration of MOD cavities may pose a challenge to the practitioner. Proper placement of precontoured matrices and commercial wedges help the clinician to establish an optimal emergence profile and sufficient contours. However, the presence of proximal concavities in premolars or molars can turn the reproduction of previous cervical architecture into an even more demanding task. Wedges with customized form or adequate design can precisely conform the matrix to the cavosurface area and prevent any gap formation. This article presents two different options that allow for successful and predictable reestablishing of anatomically correct contours and optimal proximal contacts in posterior teeth with proximal concavities.

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Cuspal deflection and depth of cure in resin-based composite restorations filled by using bulk, incremental and transtooth-illumination techniques

The Journal of the American Dental Association ◽

10.14219/jada.archive.2011.0087 ◽

2011 ◽

Vol 142 (10) ◽

pp. 1176-1182 ◽

Cited By ~ 49

Author(s):

Carlos E. Campodonico ◽

Daranee Tantbirojn ◽

Paul S. Olin ◽

Antheunis Versluis

Keyword(s):

Depth Of Cure ◽

Composite Restorations

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Quantitative SEM Analysis of Interface Gap Formation of Dental Composite Restorations Using Two Adhesive Techniques

Microscopy and Microanalysis ◽

10.1017/s1431927603027107 ◽

2003 ◽

Vol 9 (S03) ◽

pp. 364-365

Author(s):

Sam'an M. Masudi ◽

Nik Roslin S. Sulaiman

Keyword(s):

Sem Analysis ◽

Dental Composite ◽

Gap Formation ◽

Composite Restorations

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Utilization of Occlusal Index and Layering Technique in Class I Silorane-based Composite Restorations

Operative Dentistry ◽

10.2341/08-004-t ◽

2009 ◽

Vol 34 (4) ◽

pp. 491-496 ◽

Cited By ~ 1

Author(s):

E. M. Araujo ◽

M. F. De Goes ◽

D. C. N. Chan

Keyword(s):

Ring Opening ◽

Composite Layer ◽

Class I ◽

Volumetric Shrinkage ◽

Gap Formation ◽

Rubber Dam ◽

Composite Restorations ◽

New Type ◽

Posterior Restorations ◽

Final Composite

PURPOSE This article describes a technique that uses an occlusal index to restore teeth back to their original contour and anatomy with minimal finishing. A new type of ring-opening silorane composite reported to have less than 1% volumetric shrinkage was used in the restoration. For the silorane-based composite, there is no oxygen-inhibited layer to be polished away. The final composite layer is cured under pressure and further minimizes voids and gap formation. The technique can also be used on multiple posterior restorations under rubber dam isolation. Overall, if used properly, this technique helps the clinician produce superb anatomy and reduces time for posterior composite restorations.

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