Thermographic measurement of temperature change during resin composite polymerization in vivo

Hussey, David; Biagioni, P.A.; Lamey, P J

doi:10.1016/0300-5712(95)91149-h

Cited by 90 publications

(80 citation statements)

References 9 publications

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“…To achieve a satisfactory curing of 4 mm increment, a curing time of greater than 60 s is needed (Table 4), which is not practical clinically, and could endanger the, pulp by due to temperature rise for prolonged curing. 26,27 The data (Table 4) show that all thicknesses of SDR, 2-and 4-mm for TEC and only 2-mm for EHD attained maximum VH within 60 s of curing. This behavior is also observed in the value of radiant transmittance (Table 4), which reflects the absorption and scattering of the light by the composite resins and is influenced by the composite formulation and thickness of the specimen as discussed.…”

Section: Discussionmentioning

confidence: 99%

Comparing depth-dependent curing radiant exposure and time of curing of regular and flow bulk-fill composites

et al. 2017

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The effect of restoration depth on the curing time of a conventional and two bulk-fill composite resins by measuring microhardness and the respective radiosity of the bottom surface of the specimen was investigated. 1-, 3-and 5-mm thick washers were filled with Surefil SDR Flow-U (SDR), Tetric EvoCeram Bulk Fill-IVA (TEC) or Esthet-X HD-B1 (EHD), and cured with Bluephase ® G2 for 40s. Additional 1-mm washers were filled with SDR, TEC or EHD, placed above the light sensor of MARC ® , stacked with pre-cured 1-, 3-or 5-mm washer of respective material, and cured for 2.5~60s to mimic 2-, 4-and 6-mm thick composite curing. The sensor measured the radiosity (E B ) at the bottom of specimen stacks. Vickers hardness (VH) was measured immediately at 5 locations with triplicate specimens. Nonlinear regression of VH vs E B by VH=α[1-exp(-E B /β)] with all thickness shows that the values of α, maximum hardness, are 21.6±1.0 kg/mm 2 for SDR, 38.3±0.6 kg/mm 2 for TEC and 45.3±2.6 kg/mm 2 for EHD, and the values of β, rate parameter, are 0.40±0.06 J/cm 2 for SDR, 0.77±0.04 J/cm 2 for TEC and 0.58±0.09 J/cm 2 for EHD. The radiosity of the bottom surface was calculated when the bottom surface of each material attained 80% of α of each material. The curing times for each material are in agreement with manufacturer recommendation for thickness. It is possible to estimate time needed to cure composite resin of known depth adequately by the radiosity and microhardness of the bottom surface.

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Section: Discussionmentioning

confidence: 99%

Comparing depth-dependent curing radiant exposure and time of curing of regular and flow bulk-fill composites

et al. 2017

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“…Mixing the powder and liquid of a dental cement causes an exothermic reaction 6) . The temperature rise which occurs during the mixing of these materialsthenreachesthepulpchamberthroughthe dentinal tubules, thereby causing an increase in the pulpchambertemperature [7][8][9][10][11][12] . Langeland and Langeland 13) stated that as a result of temperature rise in teeth, coagulation of proteins in dentin will occur.…”

Section: Introductionmentioning

confidence: 99%

An investigation of thermal changes of various permanent dental cements

2009

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Theaimofthisstudywastoinvestigateandcomparethetemperatureriseswhichoccurredduringthesettingreactionsof different permanent cements used to lute fixed partial prosthodontics.In this study, four cements were used. They were mixed in three different proportions: according to manufacturers' recommendations, at doubled powder ratio, and at doubled liquid ratio. With a thermocouple, the temperature rises which occurred during the setting reactions were measured. For each proportion, the measurement was repeated five times such that a total of 60 measurements were done for the four different cements. Data were analyzed using analysis of variance (ANOVA).ANOVA results showed that cement type and the interaction between cement type and the powder-liquid ratio were statistically significant factors (p<0.001). Similarly, the powder-liquid ratio was a statistically significant (p<0.01) factor.Among the dental cements tested, zinc phosphate cement showed the highest temperature rise during setting reaction, whereas glass ionomer cement showed the lowest.

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“…Bleaching products are available for use in the surgery, at home or both. In-office systems produce the most rapid results and a number of clinical studies have shown that bleaching techniques can alter tooth colour by [8][9][10][11][12] shades. 1 Most current in-office bleaching systems are based on hydrogen peroxide using concentrations of up to 35% applied as a paste or gel to the tooth surface.…”

Section: Introductionmentioning

confidence: 99%

Surface and intra-pulpal temperature rises during tooth bleaching: an in vitro study

2005

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Objective To measure the surface and intra-pulpal temperature increases in vitro on upper and lower anterior teeth during tooth whitening procedures. Method A thermocouple was used to measure the temperature increase on the surface of an extracted upper central incisor tooth. Intra-pulpal temperature readings were made on upper and lower central incisors, lateral incisors and canines. Four lamps recommended for tooth bleaching were tested; a plasma arc lamp, a xenon-halogen lamp, a standard halogen lamp and a diode laser lamp. Temperature measurements were made with and without the bleaching agent present on the labial tooth surface. Results The increase in surface temperature readings ranged from 0.44°C (luma arch) to 86.3°C (laser) with no bleaching gel present. Intrapulpal temperature increases ranged from 0.30°C to 15.96°C. The presence of the bleaching gel reduced temperature increases seen at the tooth surface and within the pulp. Conclusions The increase in the intrapulpal temperature with most bleaching lamps was below the critical threshold of a 5.50°C increase thought to produce irreversible pulpal damage. The only lamp that produced an intrapulpal temperature increase above this threshold was the laser-based lamp and caution is advised when using this equipment.

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Thermographic measurement of temperature change during resin composite polymerization in vivo

Cited by 90 publications

References 9 publications

Comparing depth-dependent curing radiant exposure and time of curing of regular and flow bulk-fill composites

Comparing depth-dependent curing radiant exposure and time of curing of regular and flow bulk-fill composites

An investigation of thermal changes of various permanent dental cements

Surface and intra-pulpal temperature rises during tooth bleaching: an in vitro study

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