The influence of finishing time on the marginal seal of a resin‐modified glass–ionomer and polyacid‐modified resin composite

Context. An in vitro study carried out to evaluate and compare the effect of Cola drink on surface roughness of esthetic restorative materials. Purpose. To compare the effect of different immersion regimes in a Cola drink on surface roughness of esthetic restorative materials. Method. Two hundred samples were grouped into 4 equal groups of 50 samples each: Group I: conventional glass ionomer, Group II: resin modified glass ionomer, Group III: polyacid-modified resin composite, Group IV: Composite resin. Each group was further subdivided into 5 subgroups of 10 samples each. Subgroup A (Control Subgroup). Samples were kept immersed in artificial saliva. Subgroup B. Samples were immersed in Cola drink once a day. Subgroup C. Samples were immersed in Cola drink, 3 times a day. Subgroup D. Samples were immersed in Cola drink 5 times a day. Subgroup E. Samples were immersed in Cola drink 10 times a day. Each immersion lasted 5 minutes. The immersion protocol was repeated for 7 days. Results. Maximum surface roughness was seen in Group I conventional glass ionomer cement, followed by Group II resin modified glass ionomer, Group III polyacid modified resin composite, and Group IV composite resin samples. Conclusion. Resistance to change in surface roughness is more in resin based restorative materials as compared to glass ionomer based materials.

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To Evaluate Shear Bond Strength of Resin Composite to Theracal Lc, Biodentine, and Resin–Modified Glass Ionomer Cement and Mode of Fracture: An In Vitro Study

Dental Journal of Advance Studies ◽

10.1055/s-0040-1712052 ◽

2020 ◽

Vol 8 (02) ◽

pp. 49-54

Author(s):

Salil Mehra ◽

Ashu K. Gupta ◽

Bhanu Pratap Singh ◽

Mandeep Kaur ◽

Ashwath Kumar

Keyword(s):

Statistical Analysis ◽

Bond Strength ◽

Shear Bond Strength ◽

Resin Composite ◽

Glass Ionomer Cement ◽

Bonding Agent ◽

Glass Ionomer ◽

Universal Adhesive ◽

Resin Modified Glass Ionomer ◽

Ionomer Cement

Abstract Introduction The aim of the current study was to evaluate shear bond strength of resin composite bonded to Theracal LC, Biodentine, and resin-modified glass ionomer cement (RMGIC) using universal adhesive and mode of fracture. Materials and Methods A total of 50 caries-free maxillary and mandibular molars extracted were taken; occlusal cavities were prepared, mounted in acrylic blocks, and divided into five groups based on the liner used. Group 1: Biodentine liner placed into the cavity and bonding agent and resin composite applied after 12 minutes. Group 2: Biodentine liner placed into the cavity and bonding agent and resin composite applied after 14 days. Group 3: RMGIC liner placed into the cavity and bonding agent and resin composite applied immediately. Group 4: RMGIC liner placed into the cavity and bonding agent and resin composite applied after 7 days. Group 5: Theracal LC liner placed into the cavity and bonding agent and resin composite applied immediately. Each sample was bonded to resin composite using universal adhesive. Shear bond strength analysis was performed at a cross-head speed of 0.1 mm/min. Statistical Analysis Statistical analysis was performed with one-way analysis of variance and posthoc Bonferroni test using SPSS version 22.0. Results and Conclusion Biodentine liner when bonded immediately to resin composite showed minimum shear bond strength. RMGIC when bonded to resin composite after 7 days showed maximum shear bond strength. Mode of fracture was predominantly cohesive in groups having Biodentine and Theracal LC as liner.

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Direct Restorations, Endodontics, and Bleaching: Materials and Techniques Used by General Dentists of New Zealand

International Journal of Dentistry ◽

10.1155/2019/6327171 ◽

2019 ◽

Vol 2019 ◽

pp. 1-7 ◽

Cited By ~ 1

Author(s):

Carolina Loch ◽

Jithendra Ratnayake ◽

Arthi Veerasamy ◽

Peter Cathro ◽

Robert Lee ◽

...

Keyword(s):

New Zealand ◽

Resin Composite ◽

Quality Care ◽

Glass Ionomer ◽

New Materials ◽

Home Based ◽

Resin Modified Glass Ionomer ◽

Permanent Molars ◽

General Dentists ◽

Deciduous Molars

Background. To investigate the selection and use of direct restorative materials, endodontic techniques adopted, and approaches to bleaching by general dentists in New Zealand. Methods. A questionnaire comprising 19 sections and 125 questions was distributed via mail to 351 general dentists in New Zealand who were selected, at random, from the Dental Council of New Zealand’s 2016 register. Results. A total of 204 questionnaires were returned, of which 188 were usable. Direct resin composite was the most commonly used material for occlusoproximal cavity restorations in premolars (93.7%) and permanent molars (85.2%). Resin-modified glass ionomer cements (34%) and resin composite materials (31.4%) were more commonly used in the restoration of deciduous molars. Home-based vital bleaching was provided by a significant number of dentists (86%), while only 18% provided practice-based bleaching. Cold lateral condensation was the most commonly used obturation technique (55.8%), and 83% of respondents reported using rubber dam for treatments. Conclusions. The findings from this study indicate that dentists in New Zealand are adapting to new materials and technologies to provide high quality care to their patients. Aesthetic treatments such as bleaching have become an integral part of general dental practice.

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Water sorption of resin-modified glass-ionomer cements photoactivated with LED

Brazilian Oral Research ◽

10.1590/s1806-83242006000400011 ◽

2006 ◽

Vol 20 (4) ◽

pp. 342-346 ◽

Cited By ~ 11

Author(s):

Daniela Francisca Gigo Cefaly ◽

Linda Wang ◽

Liliam Lucia Carrara Paes de Mello ◽

Janaína Lima dos Santos ◽

Jean Rodrigo dos Santos ◽

...

Keyword(s):

Water Sorption ◽

Resin Composite ◽

Composite Resins ◽

Glass Ionomer Cements ◽

Glass Ionomer ◽

Constant Mass ◽

Light Emitting ◽

Halogen Light ◽

Resin Modified Glass Ionomer ◽

Light Curing

The Light Emitting Diodes (LED) technology has been used to photoactivate composite resins and there is a great number of published studies in this area. However, there are no studies regarding resin-modified glass-ionomer cements (RMGIC), which also need photoactivation. Therefore, the aim of this study was to evaluate water sorption of two RMGIC photoactivated with LED and to compare this property to that obtained with a halogen light curing unit. A resin composite was used as control. Five specimens of 15.0 mm in diameter x 1.0 mm in height were prepared for each combination of material (Fuji II LC Improved, Vitremer, and Filtek Z250) and curing unit (Radii and Optilight Plus) and transferred to desiccators until a constant mass was obtained. Then the specimens were immersed into deionized water for 7 days, weighed and reconditioned to a constant mass in desiccators. Water sorption was calculated based on weight and volume of specimens. The data were analyzed by two-way ANOVA and Tukey test (p < 0.05). Specimens photocured with LED presented significantly more water sorption than those photocured with halogen light. The RMGIC absorbed statistically significant more water than the resin composite. The type of light curing unit affected water sorption characteristics of the RMGIC.

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The Effect of Resin-modified Glass-ionomer Cement Base and Bulk-fill Resin Composite on Cuspal Deformation

Operative Dentistry ◽

10.2341/14-331-l ◽

2016 ◽

Vol 41 (2) ◽

pp. 208-218 ◽

Cited By ~ 5

Author(s):

KV Nguyen ◽

RH Wong ◽

J Palamara ◽

MF Burrow

Keyword(s):

Resin Composite ◽

Glass Ionomer Cement ◽

High Viscosity ◽

Glass Ionomer ◽

Base Materials ◽

Resin Modified Glass Ionomer ◽

Maxillary Premolars ◽

Materials Used ◽

Ionomer Cement ◽

Adhesive Materials

SUMMARY Objectives: This study investigated cuspal deformation in teeth restored with different types of adhesive materials with and without a base. Methods: Mesio-occluso-distal slot cavities of moderately large dimension were prepared on extracted maxillary premolars (n=24). Teeth were assigned to one of four groups and restored with either a sonic-activated bulk-fill resin composite (RC) (SonicFill), or a conventional nanohybrid RC (Herculite Ultra). The base materials used were a flowable nanofilled RC (Premise Flowable) and a high-viscosity resin-modified glass-ionomer cement (RMGIC) (Riva Light-Cure HV). Cuspal deflection was measured with two direct current differential transformers, each contacting a buccal and palatal cusp. Cuspal movements were recorded during and after restoration placement. Data for the buccal and palatal cusp deflections were combined to give the net cuspal deflection. Results: Data varied widely. All teeth experienced net inward cuspal movement. No statistically significant differences in cuspal deflection were found among the four test groups. Conclusions: The use of a flowable RC or an RMGIC in closed-laminate restorations produced the same degree of cuspal movement as restorations filled with only a conventional nanohybrid or bulk-fill RC.

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Bonding Nano-filled Resin-modified Glass Ionomer to Dentin Using Different Self-etch Adhesives

Operative Dentistry ◽

10.2341/10-383-l ◽

2011 ◽

Vol 36 (4) ◽

pp. 413-421 ◽

Cited By ~ 10

Author(s):

F El-Askary ◽

M Nassif

Keyword(s):

Clinical Relevance ◽

Resin Composite ◽

The Self ◽

Glass Ionomer ◽

Sandwich Technique ◽

Resin Modified Glass Ionomer ◽

Self Etch

Clinical Relevance A “sandwich technique” restoration using nano-filled RMGI/resin composite can be achieved in one clinical bonding step using the self-etch adhesives.

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