Restorative Dentistry & Endodontics

Research Articles

Errors in light-emitting diodes positioning when curing bulk fill and incremental composites: impact on properties after aging: Abdulrahman A. Balhaddad, Isadora M. Garcia, Haifa Maktabi, Maria Salem Ibrahim, Qoot Alkhubaizi, Howard Strassler, Fabrício M. Collares, Mary Anne S. Melo; Restor Dent Endod 2021;46(4):e51. Published online September 24, 2021; DOI: https://doi.org/10.5395/rde.2021.46.e51

Objectives

This study aimed to evaluate the effect of improper positioning single-peak and multi-peak lights on color change, microhardness of bottom and top, and surface topography of bulk fill and incremental composites after artificial aging for 1 year.

Materials and Methods

Bulk fill and incremental composites were cured using multi-peak and single-peak light-emitting diode (LED) following 4 clinical conditions: (1) optimal condition (no angulation or tip displacement), (2) tip-displacement (2 mm), (3) slight tip angulation (α = 20°) and (4) moderate tip angulation (α = 35°). After 1-year of water aging, the specimens were analyzed for color changes (ΔE), Vickers hardness, surface topography (Ra, Rt, and Rv), and scanning electron microscopy.

Results

For samples cured by single-peak LED, the improper positioning significantly increases the color change compared to the optimal position regardless of the type of composite (p < 0.001). For multi-peak LED, the type of resin composite and the curing condition displayed a significant effect on ΔE (p < 0.001). For both LEDs, the Vickers hardness and bottom/top ratio of Vickers hardness were affected by the type of composite and the curing condition (p < 0.01).

Conclusions

The bulk fill composite presented greater resistance to wear, higher color stability, and better microhardness than the incremental composite when subjected to improper curing. The multi-peak LED improves curing under improper conditions compared to single-peak LED. Prevention of errors when curing composites requires the attention of all personnel involved in the patient's care once the clinical relevance of the appropriate polymerization reflects on reliable long-term outcomes.

Citations

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The demineralization resistance and mechanical assessments of different bioactive restorative materials for primary and permanent teeth: an in vitro study
Maria Salem Ibrahim, Fahad Rakad Aldhafeeri, Abdullah Sami Banaemah, Mana S. Alhaider, Yousif A. Al-Dulaijan, Abdulrahman A. Balhaddad
BDJ Open.2024;[Epub] CrossRef
Inorganic Compounds as Remineralizing Fillers in Dental Restorative Materials: Narrative Review
Leena Ibraheem Bin-Jardan, Dalal Ibrahim Almadani, Leen Saleh Almutairi, Hadi A. Almoabid, Mohammed A. Alessa, Khalid S. Almulhim, Rasha N. AlSheikh, Yousif A. Al-Dulaijan, Maria S. Ibrahim, Afnan O. Al-Zain, Abdulrahman A. Balhaddad
International Journal of Molecular Sciences.2023; 24(9): 8295. CrossRef

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Light transmittance of CAD/CAM ceramics with different shades and thicknesses and microhardness of the underlying light-cured resin cement: Zahra Jafari, Homayoon Alaghehmand, Yasaman Samani, Mina Mahdian, Soraya Khafri; Restor Dent Endod 2018;43(3):e27. Published online June 4, 2018; DOI: https://doi.org/10.5395/rde.2018.43.e27

Abstract PDF PubReader ePub

Objectives

The aim of this in vitro study was to evaluate the effects of the thickness and shade of 3 types of computer-aided design/computer-aided manufacturing (CAD/CAM) materials.

Materials and Methods

A total of 120 specimens of 2 shades (A1 and A3) and 2 thicknesses (1 and 2 mm) were fabricated using VITA Mark II (VM; VITA Zahnfabrik), IPS e.max CAD (IE; IvoclarVivadent), and VITA Suprinity (VS; VITA Zahnfabrik) (n = 10 per subgroup). The amount of light transmission through the ceramic specimens was measured by a radiometer (Optilux, Kerr). Light-cured resin cement samples (Choice 2, Bisco) were fabricated in a Teflon mold and activated through the various ceramics with different shades and thicknesses using an LED unit (Bluephase, IvoclarVivadent). In the control group, the resin cement sample was directly light-cured without any ceramic. Vickers microhardness indentations were made on the resin surfaces (KoopaPazhoohesh) after 24 hours of dark storage in a 37°C incubator. Data were analyzed using analysis of variance followed by the Tukey post hoc test (α = 0.05).

Results

Ceramic thickness and shade had significant effects on light transmission and the microhardness of all specimens (p < 0.05). The mean values of light transmittance and microhardness of the resin cement in the VM group were significantly higher than those observed in the IE and VS groups. The lowest microhardness was observed in the VS group, due to the lowest level of light transmission (p < 0.05).

Conclusion

Greater thickness and darker shades of the 3 types of CAD/CAM ceramics significantly decreased the microhardness of the underlying resin cement.

Citations

Citations to this article as recorded by

Investigating the Ability to Mask Dental Discoloration by CAD/CAM Bleach Shade Ceramics in Different Thicknesses
Shervin Reybod, Fariba Ezoji, Ghazaleh Ahmadizenouz, Behnaz Esmaeili
Clinical and Experimental Dental Research.2025;[Epub] CrossRef
Light Polymerization through Glass-ceramics: Influence of Light-polymerizing Unit’s Emitted Power and Restoration Parameters (Shade, Translucency, and Thickness) on Transmitted Radiant Power
Ra’fat I. Farah, Ibrahim A. Alblihed, Alhareth A. Aljuoie, Bandar Alresheedi
Contemporary Clinical Dentistry.2024; 15(1): 35. CrossRef
Effect of computer-aided design/computer-aided manufacturing bleach shade ceramic thickness on its light transmittance and microhardness of light-cured resin cement
Pardis Sheibani, Ghazaleh Ahmadizenous, Behnaz Esmaeili, Ali Bijani
Dental Research Journal.2024;[Epub] CrossRef
Effects of shade and thickness on the translucency parameter of anatomic-contour zirconia, transmitted light intensity, and degree of conversion of the resin cement
Noppamath Supornpun, Molly Oster, Kamolphob Phasuk, Tien-Min G. Chu
The Journal of Prosthetic Dentistry.2023; 129(1): 213. CrossRef
The Effect of Different Surface Treatments on the Color Stabilities of Lithium Disilicate Material
Onur Doğan DAĞ, Göknil ALKAN DEMETOĞLU, Ayşegül KURT
Selcuk Dental Journal.2023; 10(2): 395. CrossRef
Effect of thickness of CAD/CAM materials on light transmission and resin cement polymerization using a blue light‐emitting diode light‐curing unit
Eduardo Fernandes de Castro, Bruna Marin Fronza, Jorge Soto‐Montero, Marcelo Giannini, Carlos Tadeu dos‐Santos‐Dias, Richard Bengt Price
Journal of Esthetic and Restorative Dentistry.2023; 35(2): 368. CrossRef
Effect of Optical Properties of Lithium Disilicate Glass Ceramics and Light-Curing Protocols on the Curing Performance of Resin Cement
Kejing Meng, Lu Wang, Jintao Wang, Zhuoqun Yan, Bin Zhao, Bing Li
Coatings.2022; 12(6): 715. CrossRef
Effect of the thickness of CAD‐CAM materials on the shear bond strength of light‐polymerized resin cement
Yener Okutan, Banucicek Kandemir, Mustafa Borga Donmez, Munir Tolga Yucel
European Journal of Oral Sciences.2022;[Epub] CrossRef
Influence of inhomogeneity of the polymerization light beam on the microhardness of resin cement under a CAD-CAM block
Yu-Ra Go, Kwang-Man Kim, Sung-Ho Park
The Journal of Prosthetic Dentistry.2022; 127(5): 802.e1. CrossRef
Evaluation of microhardness and water sorption/solubility of dual-cure resin cement through monolithic zirconia in different shades
Elham Ansarifard, Zahra Panbehzan, Rashin Giti
The Journal of Indian Prosthodontic Society.2021; 21(1): 50. CrossRef
Comparison between Different Shades of Monolithic Zirconia over Microhardness and Water Solubility and Sorption of Dual-cure Resin Cement
Sarika Sharma, Soni Kumari, Nikita Raman, Ashish K Srivastava, Gunja LNU, Arunendra S Chauhan
The Journal of Contemporary Dental Practice.2021; 22(9): 1019. CrossRef
Effect of light intensity, light-curing unit exposure time, and porcelain thickness of ips e.max press and vintage LD press on the hardness of resin cement
Silvia Naliani, Suzan Elias, Rosalina Tjandrawinata
Scientific Dental Journal.2020; 4(1): 21. CrossRef

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