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1.
J Photochem Photobiol B ; 203: 111740, 2020 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-31887638

RESUMO

PURPOSE: The aims of this ex vivo study were to evaluate the effectiveness of the Nd:YAP laser in the treatment of dentin hypersensitivity, to compare the temperature rise during laser irradiation at three different dentine thicknesses, and to analyse the composition of the dentine-lased surface. METHODS: A total of 33 teeth were used in this study. For scanning electron microscopy (SEM) observation, 24 teeth were transversely sectioned and divided into 4 groups: group A was irrigated with EDTA; group B was irradiated by Nd:YAP laser with 180 mJ energy/per pulse, 0.9 W average power, and 5 Hz frequency (power density [PD] = 229 W/cm2); group C was irradiated by Nd:YAP laser with 280 mJ energy/pulse, 1.4 W average power, and 5 Hz frequency (PD = 356 W/cm2); and group D was irradiated by Nd:YAP with 360 mJ energy/pulse, 1.8 W average power, and 5 Hz frequency (PD = 458 W/cm2). Energy-dispersive spectroscopy (EDS) analysis was performed on the same teeth evaluated for SEM observations. For temperature increase evaluation performed with thermocouples, 9 teeth were transversely sectioned at 3 different thicknesses (3 for each group) of 1, 2, and 3 mm. RESULTS: Statistical analysis showed significant changes in the diameter of the dentinal tubule orifices among all groups; EDS did not show modification of the Ca/P ratio. Temperature increase under irradiation exceeded 5.5 °C only in the group D samples. CONCLUSIONS: This ex vivo study, based on temperature recording, SEM observation, and EDS analysis, demonstrated that Nd:YAP laser at a PD of 356 W/cm2, corresponding to an average power of 1.4 W, defines the best treatment for dentine hypersensitivity in terms of compromise between efficacy of the treatment and safety of the pulp.


Assuntos
Sensibilidade da Dentina/radioterapia , Lasers de Estado Sólido/uso terapêutico , Dentina/fisiologia , Dentina/efeitos da radiação , Humanos , Microscopia Eletrônica de Varredura , Espectrometria por Raios X , Temperatura
2.
Int. j. odontostomatol. (Print) ; 12(3): 269-273, Sept. 2018. graf
Artigo em Espanhol | LILACS | ID: biblio-975744

RESUMO

RESUMEN: El uso del láser de baja potencia en odontología está siendo cada vez más frecuente y con excelentes resultados, los equipos más modernos traen pre-establecidos la dosimetría de los parámetros para las diferentes acciones clínicas. El objetivo de esta revisión fue encontrar evidencia científica que permita al clínico tener como una alternativa de tratamiento el uso del láser de baja potencia en patologías orales de tejidos blandos y duros en pacientes pediátricos. Se realizó una revisión de la literatura por medio de buscadores como PubMed, LILACS y SciELO. Después de leer a texto completo todos los trabajos es posible señalar que el láser de baja frecuencia es una buena alternativa terapéutica en la resolución de signos y síntomas en patologías orales que aquejan al paciente pediátrico, puesto que, presenta un rápido control del dolor, la inflamación, el sangrado y acelera los procesos de reparación celular.


ABSTRACT: Low Level Laser Therapy in dentistry is becoming more frequent and has had excellent results, with state of the art equipment having pre-established dosimetry parameters for the various clinical actions. The objective of this review was to find scientific evidence that allows the clinician to have the use of low power laser as treatment alternative, in oral soft tissue and hard pathologies in pediatric patients. A review of the literature was performed through search engines such as PubMed, LILACS and SciELO. After reading the texts, it was possible to point out that low frequency laser is a good therapeutic alternative in the resolution of signs and symptoms in oral pathologies of the pediatric patient. This alternative allows for rapid pain control, reduces inflammation and bleeding, and accelerates cellular repair processes.


Assuntos
Humanos , Criança , Estomatite Aftosa/terapia , Úlceras Orais/terapia , Terapia com Luz de Baixa Intensidade/métodos , Sensibilidade da Dentina/radioterapia , Lasers Semicondutores/uso terapêutico , Resultado do Tratamento , Odontopediatria/métodos , Terapia a Laser/métodos , Freio Labial/cirurgia
3.
Lasers Med Sci ; 33(4): 745-753, 2018 May.
Artigo em Inglês | MEDLINE | ID: mdl-29204915

RESUMO

The present study aims to evaluate the current scientific data regarding the effectiveness of photobiomodulation (PBM) in the treatment of dentin hypersensitivity (DH) as an alternative method for pain control. A systematic review was conducted to assess the effectiveness of PBM as treatment for DH. A complete literature search was performed up to October 2016. Searches were conducted using Boolean operators and MeSH terms. References of all selected full-text articles and related reviews were scanned. A total of 280 articles were identified (241 articles were excluded by the title and abstract). Of the 39 articles selected for analysis, 36 were excluded because they presented one or more exclusion criteria. Therefore, three articles were qualified for inclusion in this systematic review. PBM may not lead to adverse effects provided that adequately controlled parameters are followed when treating DH. More consistent studies should be conducted in order to adequately observe the advantageous therapeutic effect of PBM.


Assuntos
Sensibilidade da Dentina/radioterapia , Terapia com Luz de Baixa Intensidade/métodos , Feminino , Humanos , Masculino , Ensaios Clínicos Controlados Aleatórios como Assunto
4.
Gen Dent ; 65(4): e8-e11, 2017.
Artigo em Inglês | MEDLINE | ID: mdl-28682288

RESUMO

Postoperative sensitivity is one of the most common side effects of in-office bleaching with hydrogen peroxide. Laser phototherapy (LPT) has been suggested as an adjunctive treatment to prevent or minimize tooth sensitivity. This case report aimed to verify the efficacy of LPT in the reduction of sensitivity after in-office bleaching. Tooth bleaching was performed with 35% hydrogen peroxide activated with a hybrid LED-laser device. Immediately after the bleaching treatment, the patient reported dental sensitivity, as measured with a visual analog scale (VAS). To reduce sensitivity, LPT was applied with a 780-nm laser using the following parameters: 70 mW, exposure time of 10 seconds per point of irradiation (middle region of the buccal surfaces of each compromised tooth) in contact mode, energy of 1 J per point. Immediately after LPT, the patient reported a substantially lower level of pain on the VAS. Twenty-four hours after bleaching, the score on the VAS indicated that sensitivity levels had rebounded, and the patient received additional LPT. After 48 hours, the patient reported no dental sensitivity. The results in this patient indicated that irradiation with an infrared low-power laser substantially reduced dental pain generated by bleaching, suggesting that LPT should be considered as an auxiliary method to reduce postbleaching tooth sensitivity.


Assuntos
Sensibilidade da Dentina/radioterapia , Terapia com Luz de Baixa Intensidade/métodos , Clareamento Dental/efeitos adversos , Adulto , Sensibilidade da Dentina/etiologia , Humanos , Masculino , Medição da Dor
5.
Lasers Med Sci ; 32(5): 1023-1030, 2017 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-28391435

RESUMO

This randomized and longitudinal in vivo study aimed to assess different protocols for the treatment of dentin hypersensitivity with low-power laser (with different doses), high-power laser, and a desensitizing agent, for a period of 12 and 18 months. The lesions from 32 patients (117 lesions), who were submitted to the inclusion and exclusion criteria, were divided into nine groups (n = 13): G1: Gluma Desensitizer (Heraeus Kulzer), G2: low-power laser with low dose (three points of irradiation in vestibular portion and an apical point 30 mW, 10 J/cm2, 9 s per point with the wavelength of 810 nm, with three sessions with an interval of 72 h), G3: low-power laser with high dose (one point in the cervical area, and one apical point 100 mW, 40 J/cm2, 11 s per point with the wavelength of 810 nm in three sessions with an interval of 72 h), G4: low-power laser with low dose + Gluma Desensitizer, G5: low-power laser with high dose + Gluma Desensitizer, G6: Nd:YAG laser (Power Laser™ ST6, Research® in contact 1.0 W, 10 Hz and 100 mJ, ≈85 J/cm2, with the wavelength of 1064 nm), G7: Nd:YAG laser + Gluma Desensitizer, G8: low-power laser with low dose + Nd:YAG laser, and G9: low-power laser with high dose + Nd:YAG laser. The level of sensitivity of each volunteer was assessed by visual analog scale of pain (VAS) with the aid of air from the triple syringe and exploration probe, 12 and 18 months after treatment. All analyses were performed separately for air and probe stimulus. The level of significance was considered for values of p < 0.05. After statistical analysis, all treatments were shown to be effective in reducing dentinal hypersensitivity, and the results were considered not statistically different from those at 12 months. Therefore, until the 18-month evaluation, it could be said that no statistical differences were observed in the sensitivity levels for all treatments.


Assuntos
Sensibilidade da Dentina/terapia , Terapia com Luz de Baixa Intensidade , Adulto , Ar , Dentina/efeitos da radiação , Sensibilidade da Dentina/radioterapia , Glutaral/uso terapêutico , Humanos , Lasers de Estado Sólido , Estudos Longitudinais , Metacrilatos/uso terapêutico , Pessoa de Meia-Idade , Medição da Dor , Adulto Jovem
6.
Lasers Med Sci ; 32(4): 873-880, 2017 May.
Artigo em Inglês | MEDLINE | ID: mdl-28293873

RESUMO

This study aims to evaluate the association between Nd:YAG laser (with and without a photoabsorber) and two desensitizing dentifrices containing 15% NovaMin or 8% arginine, as potential treatments for dentin hypersensitivity (DH). DH was simulated by EDTA application for 2 min. Specimens were then analyzed with an environmental scanning electron microscope (ESEM) to ensure open dentin tubules (ODT), counted by using ImageJ software. Specimens were randomized into eight groups (n = 10): Laser (L), Laser+Photoabsorber (LP), Arginine (A), Arginine+Laser (AL), Arginine+Laser+Photoabsorber (ALP), NovaMin (N), NovaMin+Laser (NL), and NovaMin+Laser+Photoabsorber (NLP). Laser irradiation was performed with 1 W, 100 mJ, 10 Hz, ≅85 J/cm2; 4 irradiations of 10 s each, with 10 s intervals between them. After treatment, specimens were again analyzed by ESEM and submitted to erosive/abrasive cycling for 5 days. A final ESEM analysis was performed. Data were analyzed with two-way repeated measure ANOVA and Tukey tests (α = 0.05). After treatment, groups N, NL, and NLP presented the lower number of ODT, but they did not different from LP, ALP, and AL. Group A presented the highest number of ODT and it did not differ from group L. Groups L, AL, ALP, and LP presented intermediate results, without differing from each other. After cycling, group A presented the highest number of ODT and did not differ significantly from the other groups, except NLP. None of the associations tested presented better tubule occlusion than NovaMin by itself. Arginine was the only treatment that presented improved tubule occlusion when associated with Nd:YAG laser.


Assuntos
Dentifrícios/efeitos da radiação , Dessensibilizantes Dentinários/farmacologia , Sensibilidade da Dentina/radioterapia , Lasers de Estado Sólido/uso terapêutico , Dentina/efeitos da radiação , Dentina/ultraestrutura , Vidro , Humanos
7.
J Periodontol ; 88(2): 166-172, 2017 02.
Artigo em Inglês | MEDLINE | ID: mdl-27712461

RESUMO

BACKGROUND: The aim of this longitudinal study is to verify changes in the oral health-related quality of life of patients 180 days after treatment of dentin hypersensitivity (DH) with laser and cyanoacrylate. METHODS: This clinical, controlled, randomized, double-masked trial used a split-mouth design, and quadrants were randomized to receive either laser or cyanoacrylate treatments. All patients received both treatments. The study included 62 patients aged 12 to 60 years (mean: 31.4 years) in whom a total of 432 teeth were treated. Quadrants were randomly distributed into two groups: cyanoacrylate (n = 218 teeth) or laser (n = 216 teeth) treatment. DH was evaluated with air and cold stimuli at 24 hours, 30, 90, and 180 days after treatment. The Oral Health Impact Profile (OHIP-14) questionnaire was applied at baseline and 180 days after treatment. RESULTS: There were statistically significant differences in the following OHIP-14 subscales before and after treatment: physical pain (P = 0.002), psychologic discomfort (P <0.001), psychologic disability (P = 0.003), social disability (P = 0.01), and total score (P <0.001). At the end of the study, 80.6% of participants reported an improvement in their condition. CONCLUSION: There was a reduction in the impact of DH on the quality of life of study participants after interventions with laser and cyanoacrylate.


Assuntos
Cianoacrilatos/uso terapêutico , Sensibilidade da Dentina/tratamento farmacológico , Sensibilidade da Dentina/radioterapia , Terapia a Laser/métodos , Saúde Bucal , Qualidade de Vida , Adolescente , Adulto , Criança , Terapia Combinada , Método Duplo-Cego , Feminino , Humanos , Estudos Longitudinais , Masculino , Pessoa de Meia-Idade , Inquéritos e Questionários , Resultado do Tratamento
8.
Braz Dent J ; 27(1): 79-82, 2016.
Artigo em Inglês | MEDLINE | ID: mdl-27007351

RESUMO

The objective of this study was to compare the efficacy of fluoride varnish (Fluorniz(r)) and irradiation with a gallium-arsenide-aluminum diode laser in the treatment of cervical dentin hypersensitivity. Cervical dentin hypersensitivity (CDH) is a painful condition that is highly prevalent in the world's adult population, with one in six patients presenting this symptom. Eighty-six teeth were divided into two groups: Group 1, teeth treated with Fluorniz; Group 2, teeth irradiated with a GaAlAs laser at a 4 J/cm2 dose. The two treatments were applied to the buccal cervical region in four sessions, at intervals of 72 to 96 h. The response of the patient to tactile and thermal-evaporative stimuli was rated on a visual analog scale. The results showed a reduction of hypersensitivity in response to tactile and thermal-evaporative stimulation at the end of treatment in both groups. In conclusion, short-term treatment with Fluorniz was found to be more effective than low-level laser radiation in reducing cervical dentin hypersensitivity.


Assuntos
Sensibilidade da Dentina/terapia , Fluoretos/administração & dosagem , Terapia com Luz de Baixa Intensidade , Sensibilidade da Dentina/radioterapia , Humanos
9.
Lasers Med Sci ; 31(4): 713-9, 2016 May.
Artigo em Inglês | MEDLINE | ID: mdl-26964798

RESUMO

This study aimed to investigate the effect of low-level laser therapy (LLLT) on tooth sensitivity induced by in-office bleaching. Sixty-six patients enrolled in this randomized clinical trial. Following the in-office procedure with 40% hydrogen peroxide, the participants were randomly divided into three groups. The patients in group 1 received irradiation from a low-level red laser (LLRL; 660 nm, 200 mW, 15 s, 12 J/cm(2)), whereas participants in group 2 were subjected to a low-level infrared laser (LLIL; 810 nm) under similar conditions as in group 1. In group 3 (placebo), the laser treatment was the same as that in groups 1 and 2, but without energy output. The degree of tooth sensitivity was recorded at 1, 24, and 48 h after bleaching using a visual analog scale (VAS). The change in tooth shade was measured 30 days after tooth whitening. The intensity of tooth sensitivity was not significantly different between groups at 1 h after bleaching (p > 0.05). At 24 h after therapy, pain level was significantly lower in the LLIL group compared to the LLRL and placebo groups (p < 0.05). At 48 h after bleaching, VAS scores in the LLIL and LLRL groups were comparable to each other (p > 0.05) and both were significantly lower than that of the placebo group (p < 0.05). There was no significant difference in the efficacy of tooth whitening among groups (p > 0.05). LLLT with an infrared diode laser could be recommended as a suitable strategy to reduce the intensity of tooth sensitivity after in-office bleaching.


Assuntos
Sensibilidade da Dentina/radioterapia , Lasers Semicondutores/uso terapêutico , Terapia com Luz de Baixa Intensidade , Clareamento Dental/efeitos adversos , Adulto , Sensibilidade da Dentina/etiologia , Método Duplo-Cego , Feminino , Humanos , Peróxido de Hidrogênio/efeitos adversos , Masculino , Medição da Dor , Dente/efeitos dos fármacos , Dente/fisiopatologia , Dente/efeitos da radiação , Clareadores Dentários/efeitos adversos , Resultado do Tratamento , Adulto Jovem
10.
Braz. dent. j ; 27(1): 79-82, Jan.-Feb. 2016. graf
Artigo em Inglês | LILACS | ID: lil-777149

RESUMO

Abstract The objective of this study was to compare the efficacy of fluoride varnish (Fluorniz(r)) and irradiation with a gallium-arsenide-aluminum diode laser in the treatment of cervical dentin hypersensitivity. Cervical dentin hypersensitivity (CDH) is a painful condition that is highly prevalent in the world's adult population, with one in six patients presenting this symptom. Eighty-six teeth were divided into two groups: Group 1, teeth treated with Fluorniz; Group 2, teeth irradiated with a GaAlAs laser at a 4 J/cm2 dose. The two treatments were applied to the buccal cervical region in four sessions, at intervals of 72 to 96 h. The response of the patient to tactile and thermal-evaporative stimuli was rated on a visual analog scale. The results showed a reduction of hypersensitivity in response to tactile and thermal-evaporative stimulation at the end of treatment in both groups. In conclusion, short-term treatment with Fluorniz was found to be more effective than low-level laser radiation in reducing cervical dentin hypersensitivity.


Resumo Este trabalho teve o objetivo de comparar a efetividade das terapias com verniz fluoretado (Fluorniz) e com laser diodo de arseneto de gálio e alumínio (AsGaAl) no tratamento da hipersensibilidade dentinária cervical (HSDC). Foram selecionados 86 dentes divididos em dois grupos. No Grupo I foi aplicado Fluorniz e no Grupo II realizou-se irradiação com laser AsGaAI com dosimetria de 4 J/cm2, ambos na região cervical da face vestibular, em quatro sessões com intervalos de 72 a 96 horas. O registro da resposta do paciente quanto aos estímulos tácteis e termo-evaporativos foi realizado através da escala visual numérica. Os resultados demonstraram que houve uma redução da hipersensibilidade ao final do tratamento tanto para estímulo táctil quanto para o estímulo termo-evaporativo, para ambos os grupos. Concluiu-se que, em curto prazo, a terapia com Fluorniz demonstrou-se mais efetiva que o laser de baixa potência para diminuição da HSDC.


Assuntos
Humanos , Sensibilidade da Dentina/terapia , Fluoretos/administração & dosagem , Terapia com Luz de Baixa Intensidade , Sensibilidade da Dentina/radioterapia
11.
Med Arch ; 70(6): 466-469, 2016 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-28210023

RESUMO

INTRODUCTION: Dentine hypersensitivity is characterized by acute, sharp pain arising from the exposed dentine, most commonly in response to thermal, tactile, or chemical stimuli, and which cannot be linked to any other pathological changes in the tooth or the environment. Therapy uses various impregnating agents in the form of solutions or gels and, in more recent times, laser. AIM: The aim of this research was to examine the effects of treatment of hypersensitive dental cervix with diode laser. MATERIALS AND METHODS: The study included 18 patients with 82 sensitive teeth. The degree of dentine hypersensitivity was evaluated by visual analogue scale (VAS), and the treatment was carried out by application of low-power diode laser over the span of three visits, which depended on the initial sensitivity. RESULTS: There is a significant difference in VAS values measured at the onset of treatment (baseline) and immediately after the first laser treatment (t=9.275; p=0.000), after 7 days, after the second laser treatment (14 days) (t=7.085, p=0.000), as well as after 14 days and the third laser treatment (t=5.517, p=0.000), which confirms the effectiveness of this therapeutic procedure. The results showed a reduction of hypersensitivity in response to tactile stimulus with a probe after the third treatment, even with teeth whose value on the VAS was very high at the beginning of treatment (baseline). CONCLUSION: Within the scope of the conducted study, laser therapy has provided extremely safe and effective results in the treatment of cervical dentine hypersensitivity.


Assuntos
Sensibilidade da Dentina/radioterapia , Lasers Semicondutores/uso terapêutico , Terapia com Luz de Baixa Intensidade , Adulto , Relação Dose-Resposta à Radiação , Humanos , Terapia com Luz de Baixa Intensidade/métodos , Medição da Dor/métodos , Resultado do Tratamento
12.
Med Princ Pract ; 25(3): 201-11, 2016.
Artigo em Inglês | MEDLINE | ID: mdl-26642047

RESUMO

Light amplification by stimulated emission of radiation (laser) has been used widely in a range of biomedical and dental applications in recent years. In the field of restorative dentistry, various kinds of lasers have been developed for diagnostic (e.g. caries detection) and operative applications (e.g. tooth ablation, cavity preparation, restorations, bleaching). The main benefits for laser applications are patient comfort, pain relief and better results for specific applications. Major concerns for using dental lasers frequently are high cost, need for specialized training and sensitivity of the technique, thereby compromising its usefulness particularly in developing countries. The main aim of this paper is to evaluate and summarize the applications of lasers in restorative dentistry, including a comparison of the applications of lasers for major restorative dental procedures and conventional clinical approaches. A remarkable increase in the use of lasers for dental application is expected in the near future.


Assuntos
Endodontia/instrumentação , Endodontia/métodos , Terapia com Luz de Baixa Intensidade/instrumentação , Terapia com Luz de Baixa Intensidade/métodos , Resinas Acrílicas , Resinas Compostas , Cárie Dentária/diagnóstico , Cárie Dentária/radioterapia , Prótese Dentária/instrumentação , Prótese Dentária/métodos , Sensibilidade da Dentina/radioterapia , Humanos , Poliuretanos , Pulpotomia/instrumentação , Pulpotomia/métodos , Clareamento Dental/métodos
13.
Photomed Laser Surg ; 33(1): 9-14, 2015 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-25594768

RESUMO

OBJECTIVE: The aim of this study was to evaluate the desensitizing effects of a dentifrice containing nano-carbonate apatite (n-CAP) and Er,Cr:YSGG laser in the treatment of dentin hypersensitivity. BACKGROUND DATA: Most studies of hypersensitivity treatment have been conducted with different methods of professional treatment and self-care in each study. Moreover, clinical studies that compare self-care and professional treatment have not yet been published. METHODS: Eighty-two patients with dentin hypersensitivity were divided randomly into three groups: (1) a control group with strontium chloride dentifrice (SC), (2) n-CAP dentifrice (n-CAP), and (3) an Er,Cr:YSGG laser (laser) group. The study was conducted for 4 weeks: a treatment period of 2 weeks and a maintenance period of 2 subsequent weeks. The SC and n-CAP groups were instructed to brush their teeth twice a day for 1 min. The laser group visited twice at 1 week intervals for irradiation of the sensitive teeth. The desensitizing effect was evaluated by assessing the tactile sensitivity using the visual analogue scale (VAS), and evaporative air sensitivity was determined using an air blast score (ABS). RESULTS: The n-CAP group and the laser group showed significantly different desensitizing effects in VAS after 4 weeks (69% and 63%, respectively) and a 33% (p<0.05) and 3% (p>0.05) desensitizing effect, respectively, in VAS during the maintenance period. CONCLUSIONS: The n-CAP and the laser were effective in reducing dentin hypersensitivity. The laser had a superior desensitizing effect at the initial stage, whereas the n-CAP maintained its effect for a relatively longer time in clinical situations.


Assuntos
Apatitas/uso terapêutico , Dentifrícios/uso terapêutico , Dessensibilizantes Dentinários/uso terapêutico , Sensibilidade da Dentina/tratamento farmacológico , Sensibilidade da Dentina/radioterapia , Lasers de Estado Sólido/uso terapêutico , Adulto , Idoso , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Nanopartículas , Método Simples-Cego , Estrôncio/uso terapêutico , Escovação Dentária , Resultado do Tratamento
14.
Lasers Med Sci ; 30(4): 1245-9, 2015 May.
Artigo em Inglês | MEDLINE | ID: mdl-24811085

RESUMO

This study aimed to investigate the efficacy of low-level laser irradiation when applied just before placement of resin composite on reducing postoperative sensitivity of class V lesions. In this randomized clinical trial, 31 patients with 62 class V cavities were included (two teeth in each participant). The teeth were randomly assigned into laser and placebo groups. After cavity preparation, the teeth in the experimental group were subjected to irradiation from a low-power red laser (630 nm, 28 mW, continuous wave, 60 s, 1.68 J), which was applied for 1 min on the axial wall of the cavity. In the control group, the same procedure was performed but with laser simulation. Then, a self-etch adhesive was applied and the cavities were restored with a microhybrid resin composite. Before treatment and on days 1, 14, and 30 after treatment, tooth sensitivity to a cold stimulus was recorded using a visual analogue scale. Data were analyzed by Friedman and Wilcoxon signed-rank tests (p < 0.05). Pain scores after restorative procedures were significantly lower in the laser group compared to the placebo application (p < 0.05). Although both groups experienced a significant improvement in pain and discomfort throughout the follow-up periods (p < 0.001), the changes in visual analogue scale (VAS) scores between baseline and each follow-up examination were significantly greater in the laser than the placebo group (p < 0.05). Low-level laser therapy (LLLT) before placement of resin composite could be suggested as a suitable approach to reduce postoperative sensitivity in class V restorations.


Assuntos
Cárie Dentária/radioterapia , Preparo da Cavidade Dentária/métodos , Restauração Dentária Permanente/métodos , Terapia com Luz de Baixa Intensidade , Adolescente , Adulto , Idoso , Resinas Compostas/uso terapêutico , Sensibilidade da Dentina/radioterapia , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Período Pós-Operatório , Resultado do Tratamento , Adulto Jovem
15.
J Oral Rehabil ; 41(7): 523-31, 2014 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-24717149

RESUMO

Dentin hypersensitivity (DH) is defined as pain derived from exposed dentin in response to chemical, thermal, tactile, or osmotic stimuli that cannot be explained as having arisen from any other dental defect or disease. The aim of this trial was to test the efficacy and the safety of a low-level laser-emitting toothbrush on management of DH. A prospective, double blind, randomised clinical trial was designed; 96 individuals with hypersensitive teeth without caries or fracture were selected as subjects. The subjects were randomly allocated to either the test group with the 635 nm per 6 mW laser-emitting toothbrush, or the control group with the 635 nm per 12.9 µW light-emitting diode (LED) toothbrush. An air blast was applied with a dental air syringe held 3 mm away from the selected tooth and a visual analogue scale (VAS: 0-10) was used to quantify subjective pain. Assessments were completed at a screening visit and after 2-week and 4-week of using a test/control toothbrush. Results demonstrated that the use of both control and test toothbrushes resulted in decreased discomfort after 4 weeks. In the test group, pain intensity scores decreased from 5.8 ± 1.2 to 2.3 ± 1.6, and in the control group, the scores decreased from 6.4 ± 1.3 to 5.5 ± 2.0 (P < 0.05). This decrease was significantly greater in the test group. There were no significant adverse events or side effects. It was concluded that the use of the low-level laser emitting toothbrush is a safe and effective treatment option for the management of DH.


Assuntos
Sensibilidade da Dentina/radioterapia , Dor Facial , Terapia com Luz de Baixa Intensidade/métodos , Escovação Dentária/instrumentação , Adulto , Método Duplo-Cego , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Medição da Dor , Estudos Prospectivos , Resultado do Tratamento , Adulto Jovem
17.
J Oral Rehabil ; 41(5): 392-8, 2014 May.
Artigo em Inglês | MEDLINE | ID: mdl-24602082

RESUMO

Er,Cr:YSGG laser is a rising treatment option for dentine hypersensitivity (DH). However, there is no data available concerning the scanning electron microscope (SEM) evaluation of the clinical application of Er,Cr:YSGG laser in the treatment of DH. The aim of this study was to evaluate and compare the desensitising and tubule occlusion effects of Er,Cr:YSGG laser with different power settings. Twenty patients (60 teeth) participated in this study. For each patient, teeth were randomised to 3 groups. In groups 1 and 2, patients were treated with Er,Cr:YSGG laser at 0.25 and 0.5 W, respectively. In control group, same laser was applied without laser emission. DH was assessed for all groups with a visual analogue scale (VAS). When compared with the baseline data and control group, in both active treatment groups laser irradiation provided a desensitising effect immediately after treatment (P < 0.001). In group 2, VAS scores were significantly lower than group 1. The tubule diameters in the both laser groups were significantly smaller than the control group (P < 0.01). When group 1 compared with group 2, group 2 showed significantly smaller tubule diameters (P < 0.001). Both 0.25 and 0.5 W laser irradiation were effective for the treatment of DH; however, 0.5 W laser irradiation showed best results for the decrease in VAS scores. The SEM findings of the reduction in number/patency of dentine tubules seem to be related to the clinical findings, which were associated with improvement in treatment efficacy.


Assuntos
Sensibilidade da Dentina/radioterapia , Lasers de Estado Sólido/uso terapêutico , Terapia com Luz de Baixa Intensidade , Microscopia Eletrônica de Varredura , Adolescente , Adulto , Óxido de Alumínio , Sensibilidade da Dentina/fisiopatologia , Érbio , Feminino , Humanos , Terapia com Luz de Baixa Intensidade/métodos , Masculino , Pessoa de Meia-Idade , Medição da Dor , Satisfação do Paciente , Propriedades de Superfície , Resultado do Tratamento , Ítrio
18.
BMC Res Notes ; 7: 31, 2014 Jan 13.
Artigo em Inglês | MEDLINE | ID: mdl-24411005

RESUMO

BACKGROUND: Dentine hypersensitivity is a common clinical finding with a wide variation in prevalence values. The aim of this study was to evaluate the use of diode laser (810 nm) in the treatment of cervical dentine hypersensitivity. METHODS: Five patients, with at least two sensitive teeth were selected. A total of 14 teeth were included in this trial. By using Visual Analogous Scale the pain of dentine hyper sensitivity was detected and the pre- treatment readings were recorded.The Diode laser (810 nm), was irradiated on (non contact) mode at the cervical region.The samples were divided into two groups according to exposure duration: For Group 1 exposure duration was 30 seconds and for group 2 exposure duration was one minute.The efficiency of the treatment was assessed at two examination period :15 minutes after first application and 7 days after first application, the degree of sensitivity was determined by using Visual Analogous Scale. RESULTS: The results show significant reduction of pain after 15 minutes of laser application in the group with 30 seconds exposure duration (P = .001), and the pain completely fade away after one week in the same group, while in the group with 1 minute exposure duration the pain completely disappeared (visual analogous scale = (0)) after 15 minutes and one week of laser application (P = 0.001). CONCLUSION: The study concluded that application of diode laser (810 nm) was effective for the reduction of dentine hypersensitivity.


Assuntos
Sensibilidade da Dentina/radioterapia , Terapia a Laser , Lasers Semicondutores/uso terapêutico , Terapia com Luz de Baixa Intensidade , Adulto , Relação Dose-Resposta à Radiação , Feminino , Humanos , Masculino , Medição da Dor , Resultado do Tratamento
19.
Lasers Med Sci ; 29(1): 61-8, 2014 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-23184419

RESUMO

Dentinal hypersensitivity is one of the oldest recorded complaints of discomfort to mankind and yet there appears to be no permanent treatment for this clinical condition. This study was designed to evaluate the clinical efficacy of potassium binoxalate gel and neodymium:yttrium-aluminum-garnet (Nd:YAG) laser on dentin hypersensitivity for a period of 9 months. Eighty teeth (20 subjects, 25-55 years old, M = F) were evaluated in a split-mouth design to receive potassium binoxalate (group A, 40 teeth) and Nd:YAG (group B, 40 teeth: 1 W, 10 Hz, and 60 s, irradiated twice). The diameter of output beam was about 300 µm with a distance of 2 mm between laser fiber or tip and tooth surface. The clinical efficacy was evaluated by air-blast test and cold-water test using visual analog scale. Electron microscopy photomicrographs were taken to confirm the results. Analysis was done at baseline; immediately post-treatment; and at 3, 6, 9 months post-treatment. Student's paired and unpaired T tests were used to evaluate the statistical analysis. Both treatment modalities were effective in reducing dentine hypersensitivity. However, Nd:YAG laser was better when intragroup comparison was made at 9 months post-treatment. Nd:YAG lasers is better in long-term treatment (up to 9 months) owing to the melting of dentinal tubules. However, due to depth of penetration of microcrystals, gel was better when ease of the procedure is considered. Nevertheless, both treatment modalities resulted in recurrence. Hence, further studies are needed to discover an agent, which can be considered as a "gold standard".


Assuntos
Dessensibilizantes Dentinários/administração & dosagem , Sensibilidade da Dentina/tratamento farmacológico , Sensibilidade da Dentina/radioterapia , Lasers de Estado Sólido/uso terapêutico , Terapia com Luz de Baixa Intensidade , Ácido Oxálico/administração & dosagem , Adulto , Sensibilidade da Dentina/fisiopatologia , Feminino , Géis , Humanos , Masculino , Microscopia Eletrônica de Varredura , Pessoa de Meia-Idade , Fatores de Tempo , Dente/efeitos dos fármacos , Dente/efeitos da radiação , Dente/ultraestrutura
20.
Photomed Laser Surg ; 31(7): 307-14, 2013 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-23756100

RESUMO

OBJECTIVE: The aim of this study was to evaluate the effect on dentinal surfaces of diode lasers (810 and 980 nm) at different parameters. MATERIALS AND METHODS: Twenty-four caries-free human impacted wisdom teeth were used. The crowns were sectioned transversely in order to expose the dentin. The smear layer was removed by a 1 min application of ethylenediaminetetraacetic acid (EDTA). Each surface was divided into four quadrants irradiated at a different output power setting for each kind of laser: 0.8, 1, 1.6, and 2 W (energy densities: 2547, 3184, 5092, and 6366 J/cm(2), irradiation speed 1 mm/sec; optical fiber diameter: 200 µm; continuous and noncontact mode). Half of the samples were stained with a graphite paste. All specimens were sent for scanning electron microscopic (SEM) analysis. Pulp temperature increases in additional 20 teeth were measured by a thermocouple. RESULTS: Diode laser irradiations at 0.8 and 1 W led to occlusion or narrowing of dentin tubules without provoking fissures or cracks. The application of graphite paste increased the thermal effects in dentin. Measurements of pulp temperature showed that irradiations at 0.8 and 1 W for a period of 10 sec in continuous mode increased pulp temperature (T ≤2°C). CONCLUSIONS: Diode lasers (810 and 980 nm) used at 0.8 and 1 W for 10 sec in continuous mode were able to seal the dentin tubules. These parameters can be considered harmless for pulp vitality, and may be effective in the treatment of dentinal hypersensitivity.


Assuntos
Dentina/efeitos da radiação , Lasers Semicondutores/uso terapêutico , Adolescente , Adulto , Sensibilidade da Dentina/radioterapia , Humanos , Técnicas In Vitro
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