Assessment of Thermal Alteration during Class V Cavity Preparation Using the Er:YAG Laser

Raucci-Neto, Walter; Castro, Larissa M.S. De; Correa-Afonso, Alessandra M.; Silva, Reginaldo S. da; Pécora, Jesus Djalma; Palma-Dibb, Regina Guenka

doi:10.1089/pho.2007.2013

Cited by 24 publications

(15 citation statements)

References 27 publications

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“…It also can be observed that as the pulse repetition rates increased from 4 to 6 Hz, these morphological changes became more evident. These results are consistent with those of permanent teeth found in the literature (Bertrand et al, 2006;Corona et al, 2007;Hossain et al, 2003;Monghini et al, 2004;Raucci-Neto et al, 2007;Souza-Gabriel et al, 2009).…”

Section: Microscopy Research and Techniquesupporting

confidence: 93%

“…Many researchers have investigated the efficiency of the Er:YAG laser for dental applications, such as cavity preparation (Attrill et al, 2004;Bertrand et al, 2006;Chinelatti et al, 2006;Contente et al, in press;Dostalová et al, 1996;Gimbel, 2000;Raucci-Neto et al, 2007;Takamori et al, 2003), periodontal treatment (Crespi et al, 2006), and superficial treatment for caries prevention (Correa-Afonso et al, 2010;Liu et al, 2006b). This laser has an active yttrium-aluminumgarnet crystal doped with erbium ions and emits energy of 2.94 lm wavelength, which coincides with the maximum water and OHÀ À absorption peak in tooth hard tissues.…”

Section: Introductionmentioning

confidence: 99%

“…A small portion of this energy is not consumed in the ablation process, causing heating of the dental structures . Among Er:YAG laser parameters, pulse frequency deserves attention because it is directly related to temperature increment in tissues and dental pulp (Armengol et al, 2000;Attrill et al, 2004;Dostalová et al, 1998;Raucci-Neto et al, 2007;Takamori et al, 2003). According to Zach and Cohen (1965), temperature rises above 5.58C for 1 min may promote irreversible pulp damage.…”

Section: Introductionmentioning

confidence: 99%

“…According to Zach and Cohen (1965), temperature rises above 5.58C for 1 min may promote irreversible pulp damage. However, thermal variations may be minimal if the Er:YAG laser parameters are adjusted to the ideal cooling system (CorreaAfonso et al, 2008;Hibst and Keller, 1989;Matsumoto et al, 1996;Raucci-Neto et al, 2007).…”

Section: Introductionmentioning

confidence: 99%

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Thermal alteration and morphological changes of sound and demineralized primary dentin after Er:YAG laser ablation

Brandão

Contente

Lima

et al. 2011

Microscopy Res & Technique

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The purpose of this study was to assess the influence of Er:YAG laser pulse repetition rate on the thermal alterations occurring during laser ablation of sound and demineralized primary dentin. The morphological changes at the lased areas were examined by scanning electronic microscopy (SEM). To this end, 60 fragments of 30 sound primary molars were selected and randomly assigned to two groups (n = 30); namely A sound dentin (control) and B demineralized dentin. Each group was divided into three subgroups (n = 10) according to the employed laser frequencies: I-4 Hz; II-6 Hz, and III-10 Hz. Specimens in group B were submitted to a pH-cycling regimen for 21 consecutive days. The irradiation was performed with a 250 mJ pulse energy in the noncontact and focused mode, in the presence of a fine water mist at 1.5 mL/min, for 15 s. The measured temperature was recorded by type K thermocouples adapted to the dentin wall relative to the pulp chamber. Three samples of each group were analyzed by SEM. The data were submitted to the nonparametric Kruskal-Wallis test and to qualitative SEM analysis. The results revealed that the temperature increase did not promote any damage to the dental structure. Data analysis demonstrated that in group A, there was a statistically significant difference among all the subgroups and the temperature rise was directly proportional to the increase in frequency. In group B, there was no difference between subgroup I and II in terms of temperature. The superficial dentin observed by SEM displayed irregularities that augmented with rising frequency, both in sound and demineralized tissues. In conclusion, temperature rise and morphological alterations are directly related to frequency increment in both demineralized and sound dentin.

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Section: Microscopy Research and Techniquesupporting

confidence: 93%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Thermal alteration and morphological changes of sound and demineralized primary dentin after Er:YAG laser ablation

Brandão

Contente

Lima

et al. 2011

Microscopy Res & Technique

View full text Add to dashboard Cite

show abstract

“…Several studies (Armengol et al, 2000; Brandão et al, 2012; Corrêa‐Afonso et al, 2008; Firoozmand et al, 2008; Geraldo‐Martins et al, 2005; Hibst, 2002; Park et al, 2007; Raucci‐Neto et al, 2007; Staninec et al, 2006) evaluating the thermal and morphological changes induced by Er:YAG laser irradiation have been accomplished during cavity preparation using sound dentin. However, these results may not be extrapolated when the situation involves caries removal, as the carious dentin is structurally different from sound dentin (Kuboki et al, 1977).…”

Section: Introductionmentioning

confidence: 99%

Interferon regulatory factor-3 activation, hepatic interferon-stimulated gene expression, and immune cell infiltration in hepatitis C virus patients

et al. 2008

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Interferon regulatory factor-3 (IRF-3) activation directs ␣/␤ interferon production and interferon-stimulated gene (ISG) expression, which limits virus infection. Here, we examined the distribution of hepatitis C virus (HCV) nonstructural 3 protein, the status of IRF-3 activation, and expression of IRF-3 target genes and ISGs during asynchronous HCV infection in vitro and in liver biopsies from patients with chronic HCV infection, using confocal microscopy and functional genomics approaches. In general, asynchronous infection with HCV stimulated a low-frequency and transient IRF-3 activation within responsive cells in vitro that was associated with cell-to-cell virus spread. Similarly, a subset of HCV patients exhibited the nuclear, active form of IRF-3 in hepatocytes and an associated increase in IRF-3 target gene expression in hepatic tissue. Moreover, ISG expression profiles formed disease-specific clusters for HCV and control nonalcoholic fatty liver disease patients, with increased ISG expression among the HCV patients. We identified the presence of T cell and plasmacytoid dendritic cell infiltrates within all biopsy specimens, suggesting they could be a source of hepatic interferon in the setting of hepatitis C and chronic inflammatory condition. Conclusion: These results indicate that HCV can transiently trigger IRF-3 activation during virus spread and that in chronic HCV, IRF-3 activation within infected hepatocytes occurs but is limited. (HEPATOLOGY 2008;47:799-809.)

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Laser Surface Modification in Dentistry: Effect on the Adhesion of Restorative Materials

Palma‐Dibb

Faraoni

Raucci-Neto

2014

Laser Surface Modification and Adhesion

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Assessment of Thermal Alteration during Class V Cavity Preparation Using the Er:YAG Laser

Abstract: The laser promoted a greater increase in temperature only when compared with high-speed handpiece and water flow rate of 100 mL/min.

Cited by 24 publications

References 27 publications

Thermal alteration and morphological changes of sound and demineralized primary dentin after Er:YAG laser ablation

Thermal alteration and morphological changes of sound and demineralized primary dentin after Er:YAG laser ablation

Interferon regulatory factor-3 activation, hepatic interferon-stimulated gene expression, and immune cell infiltration in hepatitis C virus patients

Laser Surface Modification in Dentistry: Effect on the Adhesion of Restorative Materials

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