Underperforming light curing procedures trigger detrimental irradiance-dependent biofilm response on incrementally placed dental composites

Maktabi, Haifa; Ibrahim, Maria Salem; Alkhubaizi, Qoot; Weir, Michael D.; Xu, Hockin H.K.; Strassler, Howard E.; Fugolin, Ana Paula Piovezan; Pfeifer, Carmem S.; Melo, Mary Anne S.

doi:10.1016/j.jdent.2019.04.003

Cited by 31 publications

(24 citation statements)

References 27 publications

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Section: Methodsmentioning

confidence: 99%

“…Five measurements were obtained for each sample, and the mean value was analyzed. 21 The selected roughness parameter was Ra, defined as the average distance from the profile to the mean line over the length of the assessment. 22 The parameters were: the room temperature of 23°C, the diamond stylus movement speed at 0.50 mm/s, 4 mm of measuring length line, and 2.5 mm cutoff.…”

Section: Assessment Of Surface Roughnessmentioning

confidence: 99%

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Assessment of surface roughness changes on orthodontic acrylic resin by all-in-one spray disinfectant solutions

Hsu

Balhaddad

García

et al. 2020

J Dent Res Dent Clin Dent Prospects

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Background. The disinfection of orthodontic acrylic resins might change the physical and mechanicalproperties of these materials. We aimed to investigate the impact of four different commercially availabledisinfectants on the surface roughness of acrylic resins used for orthodontic appliances. Methods. Four disinfectant solutions (BirexSE, Opti-Cide3, COEfect MinuteSpray, and CaviCideSpray) were used to disinfect orthodontic acrylic resins using the spraying method. The resins weresubjected to repeated disinfection protocols. Distilled water, also applied via spraying method, was usedas a control. Surface roughness was scrutinized to examine the extent of surface topography changes bystylus profilometry. Data normality was evaluated via the Shapiro–Wilk test, followed by the WilcoxonSigned-Rank test for non-parametric data or paired Student’s t-test for parametric data to compareintra-group differences in roughness before and after the use of the disinfectant solutions. Results. Some of the disinfectants (BirexSE and CaviCide) resulted in significant changes in surfaceroughness values before and after the disinfection compared to the controls (P<0.05). The groups thatwere in contact with distilled water, Opti-Cide, and Coeffect did not exhibit significant differences insurface roughness before and after the intervention (P>0.05). However, from a clinical perspective, theresulting variations in surface roughness (<%0.15) induced by these solutions might not reflect clinicallysignificant differences. Conclusion. The use of disinfectant solutions is unlikely to harm the surface of orthodontic acrylic resins.Oral care providers need to be attentive to the interpretation and implementation of clinically significantchanges in their evidence-based approach regarding potential material damages by disinfection sprays.

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Section: Methodsmentioning

confidence: 99%

Section: Assessment Of Surface Roughnessmentioning

confidence: 99%

Assessment of surface roughness changes on orthodontic acrylic resin by all-in-one spray disinfectant solutions

Hsu

Balhaddad

García

et al. 2020

J Dent Res Dent Clin Dent Prospects

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“…Traditional resin-based dental materials consist primarily of methacrylate monomers. Due to the presence of ester moieties in these methacrylates, they are highly susceptible to degradative stresses caused by bacterial invasion and salivary enzymes [ 61 ]. Considering that no resin-based material can be polymerized completely to achieve the 100% conversion of monomers to polymers, the degradation stresses lead to a release of unreacted monomers within the material, which may trigger bacterial attachments and biofilm formation [ 62 ].…”

Section: Contact-killing Materials As a Strategy In Resin-based Rementioning

confidence: 99%

Emerging Contact-Killing Antibacterial Strategies for Developing Anti-Biofilm Dental Polymeric Restorative Materials

et al. 2020

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Polymeric materials are the first choice for restoring tooth cavities, bonding tooth-colored fillings, sealing root canal systems, and many other dental restorative applications. However, polymeric materials are highly susceptible to bacterial attachment and colonization, leading to dental diseases. Many approaches have been investigated to minimize the formation of biofilms over polymeric restorative materials and at the tooth/material interfaces. Among them, contact-killing compounds have shown promising results to inhibit dental biofilms. Contact-killing compounds can be immobilized within the polymer structure, delivering a long-lasting effect with no leaching or release, thus providing advantages compared to release-based materials. This review discusses cutting-edge research on the development of contact-killing compounds in dental restorative materials to target oral pathogens. Contact-killing compounds in resin composite restorations, dental adhesives, root canal sealers, denture-based materials, and crown cements have all demonstrated promising antibacterial properties. Contact-killing restorative materials have been found to effectively inhibit the growth and activities of several oral pathogens related to dental caries, periodontal diseases, endodontic, and fungal infections. Further laboratory optimization and clinical trials using translational models are needed to confirm the clinical applicability of this new generation of contact-killing dental restorative materials.

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“…angle the light tip. Doing so will reduce the amount of energy delivered and reduce the ultimate polymerisation of the RBC 3,59,60 . Consequently, a low-profile head (Figure 7b) that will allow better access to the posterior teeth is recommended 42,43,45 .…”

Section: Light-curing Unit Ergonomicsmentioning

confidence: 99%

The light-curing unit: An essential piece of dental equipment

Price

Ferracane

Hickel

et al. 2020

International Dental Journal

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Introduction: This article describes the features that should be considered when describing, purchasing and using a lightcuring unit (LCU). Methods: The International System of Units (S.I.) terms of radiant power or radiant flux (mW), spectral radiant power (mW/nm), radiant exitance or tip irradiance (mW/cm 2), and the irradiance received at the surface (also in mW/cm 2) are used to describe the output from LCU. The concept of using an irradiance beam profile to map the radiant exposure (J/cm 2) from the LCU is introduced. Results: Even small changes in the active tip diameter of the LCU will have a large effect on the radiant exitance. The emission spectra and the effects of distance on the irradiance delivered are not the same from all LCUs. The beam profile images show that using a single averaged irradiance value to describe the LCU can be very misleading. Some LCUs have 'hot spots' of high radiant exitance that far exceed the current ISO 10650 standard. Such inhomogeneity may cure the resin unevenly and may also be dangerous to soft tissues. Recommendations are made that will help the dentist when purchasing and then safely using the LCU. Conclusions: Dental manufacturers should report the radiant power from their LCU, the spectral radiant power, information about the compatibility of the emission spectrum from the LCU with the photoinitiators used, the active optical tip diameter, the radiant exitance, the effect of distance from the tip on the irradiance delivered, and the irradiance beam profile from the LCU.

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Underperforming light curing procedures trigger detrimental irradiance-dependent biofilm response on incrementally placed dental composites

Cited by 31 publications

References 27 publications

Assessment of surface roughness changes on orthodontic acrylic resin by all-in-one spray disinfectant solutions

Assessment of surface roughness changes on orthodontic acrylic resin by all-in-one spray disinfectant solutions

Emerging Contact-Killing Antibacterial Strategies for Developing Anti-Biofilm Dental Polymeric Restorative Materials

The light-curing unit: An essential piece of dental equipment

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