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Light-curing units used in dentistry: factors associated with heat development – potential risk for patients
(Journal article; Tidsskriftartikkel; Peer reviewed, 2016-10-01)
Objectives:<br>To investigate how heat development in the pulp chamber and coronal surface of natural teeth with and without cusps subjected to irradiance using light-emitting diode (LED)–light-curing units (LCUs) is associated with (i) irradiance, (ii) time, (iii) distance, and (iv) radiant exposure.<br>
Materials and methods:<br>Three different LED-LCUs were used. Their irradiance was measured ...
Heat Development in the Pulp Chamber During Curing Process of Resin-Based Composite Using Multi-Wave LED Light Curing Unit
(Journal article; Tidsskriftartikkel; Peer reviewed, 2020-07-08)
<i>Objective</i>: The study aimed to investigate factors contributing to heat development during light curing of a flowable bulk-fill resin-based composite (SDR<sup>TM</sup>, Lot # 602000876, Dentsply Sirona, Konstanz, Germany) (RBC).<p><p>
<i>Materials and Methods</i>: Temperatures were measured with calibrated thermocouples. A multi-wave light-emitting diode (LED) light curing unit (LCU) was ...
Effect of cements on fracture resistance of monolithic zirconia crowns
(Journal article; Tidsskriftartikkel; Peer reviewed, 2016-01-26)
Objectives - The present study investigated the effect of cements on fracture resistance of monolithic zirconia crowns in relation to their compressive strength.<p>
<p>Materials and methods - Four different cements were tested: zinc phosphate cement (ZPC), glass-ionomer cement (GIC), self-adhesive resin-based cement (SRC) and resin-based cement (RC). RC was used in both dual cure mode (RC-D) and ...
Light-curing units used in dentistry: Effect of their characteristics on temperature development in teeth
(Journal article; Tidsskriftartikkel; Peer reviewed, 2021-09-25)
This study aimed to investigate pulp chamber and surface temperature development using different LED light curing units (LCUs). Eight brands of LED-LCUs were tested in a laboratory bench model. The pulp chamber and surface temperature were recorded with a type T thermocouple and infrared cameras, respectively. The highest pulp chamber and surface temperature increase was 6.1±0.3°C and 20.1±1.7°C, ...
Quantification of porosity in composite resins delivered by injectable syringes using X-ray microtomography
(Journal article; Tidsskriftartikkel; Peer reviewed, 2020-07-06)
<i>Objective</i>: To assess whether composite polymer resin delivered in compules include pores and the possible effect on the amount of porosity in dental restorations.<p>
<p><i>Method and materials</i>: Original compules containing unpolymerised composite polymer resin (CPR) were scanned in a micro-CT. Four products were examined, which comprised universal composites (Herculite XRV Ultra, Ceram.X ...
In vitro Candida albicans biofilm formation on different titanium surface topographies
(Journal article; Tidsskriftartikkel; Peer reviewed, 2020-10-09)
<i>Objectives</i> - To investigate if differences in titanium implant surface topography influence <i>Candida albicans</i> biofilm formation.<p>
<p><i>Materials and Methods</i> - Titanium discs were prepared and characterized using a profilometer: Group A (<i>R</i><sub>a</sub> 0.15 µm, smooth), Group B (<i>R</i> <sub>a</sub> 0.64 µm, minimally rough) and Group C (<i>R</i> <sub>a</sub> 1.3 µm, ...
How does indirect air-cooling influence pulp chamber temperature in different volume teeth and absence/presence of resin-based composite during light curing?
(Journal article; Tidsskriftartikkel; Peer reviewed, 2022-11-24)
<p><b>
Background</b>
Light-curing of materials during restorative dental procedures poses a risk for pulp tissue overheating. Therefore, the aim of this study was to investigate the effect of indirect air-cooling on pulp chamber temperatures during light-curing of varying volume teeth and absence/presence of resin-based composite (RBC) at different exposure time.
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Methods</b>
The ...