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1.
Braz. j. oral sci ; 21: e223759, jan.-dez. 2022. ilus
Article in English | LILACS, BBO | ID: biblio-1355009

ABSTRACT

Aim: To evaluate the fracture resistance of roots restored with CAD/CAM-fabricated posts, receiving or not intracanal laser treatment, compared with glass fiber posts under mechanical cycling. Methods: Twenty-seven endodontically treated, single-rooted teeth were divided into 3 groups: group 1 (control), prefabricated glass fiber posts relined with resin composite; group 2, CAD/CAM-fabricated intraradicular posts using Resin Nano Ceramic (RNC) blocks; and group 3, CAD/CAM-fabricated intraradicular posts using RNC blocks in canals irradiated with a 940-nm diode laser (100 mJ, 300-um optic fiber, coronal-apical and apical-coronal helical movements, speed of 2 mm/second, 4 times each canal). After cementation of the coping, cyclic loading was applied at an angle of 135° to the long axis of the root, with a pulse load of 130 N, frequency of 2.2 Hz, and 150,000 pulses on the crown at a point located 2 mm below the incisal edge on the lingual aspect of the specimen. Every 50,000 cycles, the specimens were evaluated for root fracture occurring below or above the simulated bone crest. Results were analyzed by one-way ANOVA followed by Tukey's test (p<0.05). Results: Group 1 was the least resistant, while groups 2 and 3 were the most resistant. Group 1 differed significantly from groups 2 and 3 (p<0.01), but there was no difference between groups 2 and 3 (p<0.01). Conclusion: Treatment of the intracanal surface with diode laser had no influence on fracture resistance of roots restored with CAD/CAM-fabricated posts, but a longer cycling time is required to evaluate the real benefits of diode laser irradiation


Subject(s)
Humans , Tooth Fractures/rehabilitation , Tooth Root/injuries , Dental Pins , Dentistry , Lasers, Semiconductor/therapeutic use
2.
Braz. j. oral sci ; 21: e226630, jan.-dez. 2022. ilus
Article in English | LILACS, BBO | ID: biblio-1393209

ABSTRACT

Aim: The present study aimed to asses enamel microhardness after office bleaching with diode laser and LED light compared to the conventional bleaching procedure. Methods: Thirty-nine human premolar teeth were collected and randomly divided into three groups regarding of the bleaching technique. Group 1: Snow O bleaching gel with LED light-curing unit; Group 2: Snow L bleaching gel with diode laser irradiation; and Group 3: Opalescence Boost bleaching gel with no light source in group 3. Enamel surface changes were evaluated in one tooth in each study group and one intact tooth as a reference under a scanning electron microscope (SEM). In the remaining samples (n=12), enamel microhardness was determined by Vickers microhardness test before and after bleaching. Data were analyzed with repeated-measures ANOVA to compare microhardness changes, followed by post hoc Tukey tests at the 0.05 significance level. Results: Enamel microhardness decreased in all the groups after bleaching, with the maximum decrease in microhardness in the Snow O bleaching group with LED light, which was significantly higher than the other groups (P=0.002). The two other groups did not exhibit any significant difference in microhardness decrease (P>0.05). Conclusion:Based on the limitations of this study, it can be concluded power bleaching with 980nm diode laser was less time-consuming compare to conventional bleaching procedure and yielded better outcomes in terms of enamel surface microhardness compared to the use of an LED light-curing unit


Subject(s)
Tooth Bleaching/adverse effects , Dental Enamel , Lasers, Semiconductor , Curing Lights, Dental , Hardness
3.
Rev. Odontol. Araçatuba (Impr.) ; 43(1): 41-44, jan.-abr. 2022. ilus
Article in English | LILACS, BBO | ID: biblio-1361662

ABSTRACT

Background: Glanzmann thrombasthenia (GT) is a rare autosomal recessive disorder characterized by platelet function impairment. Considering that the oral cavity is highly vascularized and performing some local hemostatic maneuvers may be difficult, GT patients are at high risk for hemorrhage related to invasive oral procedures. This study aimed to present an alternative method for periodontal surgery in a young GT patient. Case Report: A 15-year-old female GT patient with a recent history of excessive bleeding following dental surgeries was referred to a public dental center, presenting gingival hyperplasia. The procedure was performed using a high-power laser (HPL), and except for local anesthesia with epinephrine, no further hemostatic agent was necessary. Conclusion: According to the case, the HPL seems to be an efficient tool for preventing perioperative bleeding in GT patients submitted to minor oral surgeries(AU)


Introdução: A trombastenia de Glanzmann (TG) é uma doença autossômica recessiva rara caracterizada por comprometimento da função plaquetária. Tendo em vista que a cavidade oral é altamente vascularizada e a realização de algumas manobras hemostáticas locais pode ser difícil, pacientes com TG apresentam alto risco de hemorragia relacionada a procedimentos orais invasivos. Este artigo teve como objetivo apresentar uma técnica alternativa para cirurgia periodontal em um paciente jovem com TG. Relato de Caso: Paciente com TG, sexo feminino, 15 anos, com história recente de sangramento excessivo relacionado a cirurgias odontológicas prévias, foi encaminhada a um centro odontológico público apresentando hiperplasia gengival. O procedimento de remoção foi realizado com laser de alta potência e, com exceção da anestesia local com epinefrina, nenhum outro agente hemostático foi necessário. Conclusão: De acordo com o caso, o laser de alta potência parece ser uma ferramenta eficiente na prevenção de sangramento perioperatório em pacientes com TG submetidos a pequenas cirurgias orais(AU)


Subject(s)
Humans , Female , Adolescent , Surgery, Oral , Thrombasthenia , Blood Coagulation Disorders , Laser Therapy , Lasers, Semiconductor , Gingival Hyperplasia
4.
Rev. bras. oftalmol ; 81: e0035, 2022. tab
Article in English | LILACS | ID: biblio-1376791

ABSTRACT

ABSTRACT Objective: To evaluate the efficacy of mitomycin C in anatomical and functional success after modified transcanalicular diode laser dacryocystorhinostomy. Methods: A prospective, double-blinded, randomized placebo-controlled study compared the effect of topical mitomycin C on modified transcanalicular diode laser dacryocystorhinostomy. Group 1 had modified transcanalicular diode laser dacryocystorhinostomy with topical saline, while Group 2 had modified transcanalicular diode laser dacryocystorhinostomy with topical mitomycin C. Success was defined as anatomical patency and relief of symptoms at the end of 6 months. Results: Six months after surgery, Group 1 (30 patients) showed anatomical and functional success rates of 86.7% and 83.3%, respectively. Group 2 (32 patients) showed anatomical and functional success rates of 87.5% and 84.3%, respectively. There was no statistically significant difference between the groups 1 and 2 (p = 1.000). Conclusion: The use of mitomycin C did not improve the anatomical and functional success rates of modified transcanalicular diode laser dacryocystorhinostomy compared to placebo.


RESUMO Objetivo: Avaliar a eficácia da mitomicina C no sucesso anatômico e funcional após dacriocistorrinostomia transcanalicular com laser de diodo. Métodos: Estudo prospectivo, duplo-cego, randomizado e controlado por placebo. Comparou o efeito da mitomicina C tópica na dacriocistorrinostomia transcanalicular com laser de diodo. No Grupo 1, foi utilizada apenas solução salina tópica, enquanto no Grupo 2 foi utilizada mitomicina C tópica. O sucesso foi definido como permeabilidade da via lacrimal e alívio dos sintomas ao final de 6 meses. Resultados: Seis meses após a cirurgia, o Grupo 1 (30 pacientes) apresentou taxas de sucesso anatômico e funcional de 86,7% e 83,3%, respectivamente. O Grupo 2 (32 pacientes) apresentou taxas de sucesso anatômico e funcional de 87,5% e 84,3%, respectivamente. Não houve diferença estatística significante entre os Grupos 1 e 2 (p=1,000). Conclusão: O uso de mitomicina C não melhora as taxas de sucesso anatômico e funcional do dacriocistorrinostomia transcanalicular com laser de diodo em comparação ao placebo.


Subject(s)
Humans , Male , Female , Middle Aged , Dacryocystorhinostomy/methods , Mitomycin/administration & dosage , Mitomycin/therapeutic use , Mitomycin/pharmacology , Lasers, Semiconductor/therapeutic use , Nasolacrimal Duct/drug effects , Placebos , Random Allocation , Double-Blind Method , Prospective Studies , Follow-Up Studies , Treatment Outcome , Chemotherapy, Adjuvant , Dacryocystitis/surgery , Laser Therapy/methods , Lacrimal Duct Obstruction/therapy , Nasolacrimal Duct/surgery
5.
Int. j. med. surg. sci. (Print) ; 7(4): 1-13, dic. 2020. ilus
Article in Spanish | LILACS | ID: biblio-1151707

ABSTRACT

Existen diversas condiciones anatómicas o alteraciones mucogingivales que pueden afectar tanto el normal funcionamiento como la estética gingival de piezas dentarias e implantes dentales. Si bien los tratamientos de estas condiciones se han realizado tradicionalmente con bisturí, el desarrollo tecnológico ha permitido que actualmente se pueden realizar con láser. Existen diferentes tipos de láser, siendo el diodo uno de los más utilizados debido a su menor tamaño, portabilidad, fácil configuración y menor costo. El láser ha adquirido mayor popularidad en cirugías de tejido blando dado sus múltiples beneficios: menor tiempo operatorio, control del sangrado y de la hemostasia, reducción de la cantidad de anestesia, posibilidad de no requerir suturas y minimización del dolor e inflamación postquirúrgica. El propósito de este trabajo es presentar la resolución de tres casos clínicos a los cuales se les realizaron los procedimientos de frenectomía labial, remoción de melanosis gingival y resección de fibroma irritativo mediante el uso de láser diodo. Para desarrollar todos los procedimientos se utilizó un equipo de láser diodo de 940 nm (Biolase®, USA) con una potencia que varió entre 2 y 2.5 W en modo continuo utilizando una pieza quirúrgica con una punta de 300 µm (E 3-4), la que fue activada antes de empezar. Posterior a la cirugía se bioestimuló para disminuir el dolor y edema postoperatorio utilizando la punta de dolor a 4 W por 30 segundos a una distancia de 1 cm directo en la zona intervenida a todos los casos. La conclusión arroja que en todos los casos, el láser de diodo permitió un resultado exitoso. El procedimiento fue seguro, la técnica fue sencilla y de tiempo clínico reducido. El postoperatorio ocurrió con ausencia de dolor o molestias, generando una mayor satisfacción del paciente. Cabe señalar que la técnica depende de la habilidad del profesional que la realiza.


There are various anatomical conditions or mucogingival alterations that can affect the normal functioning and the gingival aesthetics of teeth and dental implants. Although the treatments of these conditions have been traditionally performed with a scalpel, technological development has allowed that they can be now performed with lasers. There are different types of lasers, being the diode one of the most used due to its smaller size, portability, easy configuration, and lower cost. The laser has become more popular in soft tissue surgeries due to its multiple benefits: shorter operating time, control of bleeding and hemostasis, reduction in the amount of anesthesia, possibility of not requiring sutures, and minimization of post-surgical pain and inflammation. The purpose of this work is to present the resolution of three clinical cases which underwent labial frenectomy procedures, removal of gingival melanosis and resection of irritative fibroma using diode laser. To develop all the procedures, a 940 nm diode laser equipment (Biolase®, USA) was used with a power that varied between 2 and 2.5 W in continuous mode, using a 300 µm tip (E 3-4), which was activated before starting. After surgery, biostimulation was carried out to reduce postoperative pain and edema using the pain tip at 4 W for 30 seconds at a distance of 1 cm directly in the operated area in all cases. In all cases, the diode laser allowed a successful result. The procedure was safe, the technique was simple, and the clinical time was short. The postoperative period occurred with the absence of pain or discomfort, generating greater patient satisfaction. It should be noted that the technique depends on the skill of the professional who performs it.


Subject(s)
Humans , Female , Adult , Middle Aged , Aged , Lasers, Semiconductor/therapeutic use , Gingival Diseases/surgery , Labial Frenum/surgery , Therapy, Soft Tissue
6.
Int. j. med. surg. sci. (Print) ; 7(4): 1-20, dic. 2020. tab, ilus
Article in Spanish | LILACS | ID: biblio-1151709

ABSTRACT

El propósito de este artículo es mejorar nuestro conocimiento sobre las estructuras y función de los diferentes elementos presentes en la boca del recién nacido, ya que en ocasiones los odontólogos no recuerdan la importancia de la boca en el desarrollo general del lactante y la necesidad de una intervención temprana con láseres para ayudarles a obtener un buen estado de su sistema oral. Realizamos una exploración clínica integral del paciente con el fin de realizar un diagnóstico más preciso. Cuando la cirugía sea necesaria, recomendamos utilizar láseres de Erbio siempre que sea posible (láser de 2780nm Er, Cr: YSGG o un Er: YAG de 2940nm), ya que es una opción rápida y eficaz para tratar estas lesiones orales, especialmente los frenillos labiales o linguales que pueden poner en riesgo el acto de amamantar; Asimismo podemos utilizar láseres de diodo (810nm, 940nm, 980 nm o un láser Nd: YAG de 1064nm o de CO2 10.600- 9600 nm) con sus gafas de seguridad específicas. Estos sistemas láser utilizados por un profesional certificado, en colaboración con un personal debidamente entrenado, son un factor muy importante durante la cirugía. Al tener un conocimiento adecuado de las estructuras orales y sus patologías, podemos diagnosticar si esos trastornos deben tratarse quirúrgicamente y, de ser así, cómo proceder con los sistemas láser, ya que son procedimientos mínimamente invasivos; o si debiésemos recomendar a los padres que visiten a un terapeuta miofuncional para ayudar a recuperar la función normal. La comprensión de las estructuras orales de los recién nacidos es muy importante para promover el desarrollo del crecimiento craneofacial y para brindar un servicio importante a las madres, dándoles a sus bebés un buen comienzo en la vida desde una etapa muy temprana. Necesitamos mejorar la colaboración entre profesionales de diferentes disciplinas con el fin de mejorar nuestro conocimiento.


The purpose of this article is to improve our knowledge about the structures and function of the different elements present in the mouth of newborns since dentists sometimes do not remember the importance of the mouth in the general development of infants and the need for an early intervention with lasers to help them obtain a good state of their Oral System. We performed a comprehensive clinical exploration of the patient in order to make a more accurate diagnosis. When surgery is necessary, we recommend to use erbium lasers when possible (2780nm Er, Cr: YSGG laser or a 2940nm Er: YAG), as they are a quick and effective option to treat these oral lesions, especially lip or tongue ties which can risk the act of breastfeeding; moreover, we can also use diode lasers (810nm, 940nm, 980nm or a 1064nm Nd:YAG laser or CO2 10.600-9600 nm.) al lof them with their specifical safety goggles. These laser systems used by a certified professional, in collaboration with a properly trained staff, are a very important factor during the surgery.By having proper knowledge of the oral structures and their pathologies, we are able to diagnose whether those disorders should be surgically treated and if so, how to proceed with laser systems as they are minimally invasive procedures; or if we should recommend parents to visit a myofunctional therapist in order to help recover the normal function.The understanding of oral structures of newborns is very important in order to improve the development of craniofacial growth and provide an important service to mothers by giving their babies a right start in life from a very early stage. We need to improve collaboration between professionals from different disciplines in order to enhance our knowledge.


Subject(s)
Humans , Infant, Newborn , Lasers, Semiconductor/therapeutic use , Lasers, Solid-State/therapeutic use , Mouth/surgery , Oral Surgical Procedures , Ankyloglossia/surgery , Labial Frenum/surgery
7.
Int. j. med. surg. sci. (Print) ; 7(4): 1-12, dic. 2020. ilus
Article in Spanish | LILACS | ID: biblio-1151807

ABSTRACT

Los implantes dentales son ampliamente usados para el reemplazo de piezas dentarias y se han convertido en el "gold standard" de las terapias protésicas en odontología. Dado el mayor uso de éstos, las investigaciones epidemiológicas recientes han demostrado elevadas tasas de prevalencia de enfermedad periimplantaria. En el presente estudio se presentan tres casos clínicos diagnosticados con periimplantitis. Todos los casos presentaron aumento de la profundidad al sondaje periimplantario en relación a controles anteriores, supuración, sangramiento al sondaje y pérdida ósea confirmada a través de tomografía computada cone beam. El tratamiento indicado para todos los casos fue una terapia conjunta entre un tratamiento mecánico mediante ultrasonido con la utilización de puntas plásticas (P.I EMS®, Suiza) y la terapia con láser. Para la laserterapia se utilizó un equipo de láser diodo de 940 nm (Biolase®, USA) con una potencia de 2 W en modo CW, utilizando una punta de 300 µm. El láser de diodo no daña la superficie de titanio y es capaz de descontaminar las superficies rugosas de los implantes. En este reporte, el uso de una terapia combinada mecánica y láser fue efectiva en todos los casos. En los controles clínicos, la mucosa periimplantaria no presentó signos de supuración ni sangramiento, y la profundidad al sondaje también se vió disminuída. El nivel óseo se controló a través de una tomografía computada cone beam y no se evidenciaron cambios significativos. En la actualidad, la evidencia clínica para el tratamiento periimplantario mediante la fototerapia todavía es limitada. Sin embargo, el láser ofrece un enfoque técnico novedoso que es completamente diferente de los instrumentos mecánicos y tiene varios efectos beneficiosos, por lo que puede desempeñar un papel importante, en la resolución de la peri-implantitis.


Dental implants are widely used for the replacement of teeth and have become the "gold standard" of prosthetic therapies in dentistry. Given the increased use of these, recent epidemiological investigations have shown high prevalence rates of peri-implant disease. In the present study, three clinical cases diagnosed with peri-implantitis are presented. All cases presented increased depth to peri-implant probing in relation to previous controls, suppuration, bleeding and bone loss confirmed by cone beam computed tomography. The treatment indicated for all cases was a joint therapy between a mechanical ultrasound treatment with the use of plastic tips (P.I EMS®, Switzerland) and laser therapy. For laser therapy, a 940 nm diode laser equipment was used (Biolase®, USA) with a power of 2W in continuous laser beam mode, using a 300 µm tip. The diode laser does not damage the titanium surface and is capable of decontaminating the rough surfaces of the implants. In this report, the use of a combined mechanical and laser therapy was effective in all cases. In clinical controls, the peri-implant mucosa did not show signs of suppuration or bleeding, and the depth on probing was decreased. The bone level was controlled through a cone beam computed tomography and no significant changes were evidenced. At present, the clinical evidence for peri-implant treatment using phototherapy is still limited. However, the laser offers a novel technical approach that is completely different from mechanical instruments and has several beneficial effects, so it can play an important role in the resolution of peri-implantitis.


Subject(s)
Humans , Male , Female , Middle Aged , Aged , Lasers, Semiconductor/therapeutic use , Peri-Implantitis/radiotherapy , Dental Implants
8.
Arq. bras. oftalmol ; 83(1): 1-4, Jan.-Feb. 2020. tab
Article in English | LILACS | ID: biblio-1088953

ABSTRACT

ABSTRACT Purpose: To determine the reliability of the endoscopic dye transit test for the prediction of functional success after dacryocystorhinostomy. Methods: A cross-sectional study was conducted with 50 patients who underwent external dacryocystorhinostomy Group or transcanalicular dacryocystorhinostomy Group and had anatomically patent ducts during irrigation, with a minimum 6-month follow-up. The external dacryocystorhinostomy, defined as the time from instillation of the dye into the conjunctival sac until its flow from the rhinostomy site, was performed in all patients. Positive predictive value of the endoscopic dye transit test to assess functional success was analyzed. The cutoff point was determined using a receiver operating characteristic curve. Results: Of the 50 patients, 44 (88%) exhibited subjective improvement or complete resolution of epiphora (functional success). The best cutoff point for the endoscopic dye transit test was 60 s. Of 39 patients with endoscopic dye transit test £60 s, 38 (97.4%) exhibited functional success, demonstrating a 97.4% positive predictive value. Conclusion: The endoscopic dye transit test £60 s is a reliable tool to predict functional success and good prognosis after external or laser transcanalicular dacryocystorhinostomy.


RESUMO Objetivo: Determinar a confiabilidade do teste endoscópico do corante na predição do sucesso funcional após dacriocistorrinostomia. Métodos: Estudo transversal com 50 pacientes submetidos ao grupo de dacriocistorrinostomia externa ou grupo dacriocistorrinostomia transcanalicular e que possuíam dutos anatomicamente patentes pela irrigação, com seguimento mínimo de 6 meses. A dacriocistorrinostomia externa, definida como o tempo desde a instilação do corante no saco conjuntival até o fluxo do local da rinostomia, foi realizada em todos os pacientes. O valor preditivo positivo do teste endoscópico do corante para avaliar o sucesso funcional foi analisado. O ponto de corte foi determinado usando uma curva característica de operação do receptor. Resultados: Dos 50 pacientes, 44 (88%) apresentaram melhora subjetiva ou resolução completa da epífora (sucesso funcional). O melhor ponto de corte para o teste endoscópico do corante foi de 60 s. Dos 39 pacientes com teste endoscópico do corante £60 s, 38 (97,4%) apresentaram sucesso funcional, demonstrando um valor preditivo positivo de 97,4%. Conclusão: O teste en­doscópico do corante £60 s é uma ferramenta confiável para predizer o sucesso funcional e o bom prognóstico após dacriocistorrinostomia transcanalicular externa ou a laser.


Subject(s)
Humans , Male , Female , Adult , Middle Aged , Aged , Aged, 80 and over , Dacryocystorhinostomy/methods , Lasers, Semiconductor/therapeutic use , Lacrimal Duct Obstruction/diagnosis , Nasolacrimal Duct/physiopathology , Cross-Sectional Studies , Predictive Value of Tests , Reproducibility of Results , Contrast Media , Endoscopy/methods
9.
Rev. bras. oftalmol ; 79(1): 38-41, Jan.-Feb. 2020. tab, graf
Article in Portuguese | LILACS | ID: biblio-1092654

ABSTRACT

Resumo Objetivo: Avaliar a efetividade e o perfil de segurança da ciclofotocoagulação transescleral padrão (CTCTE) e sua variação técnica denominada slow cooking (CTCTE SC) em pacientes com olho cego doloroso por glaucoma neovascular. Métodos: Pacientes foram submetidos a exame oftalmológico, graduando o nível da dor através de escala gráfica/numérica e divididos em dois grupos, um para tratamento com CTCTE e outro CTCTE SC. O acompanhamento foi realizado no primeiro, trigésimo e nonagésimo dias. Resultados: Dos 26 pacientes inclusos, 11 (42,3%) eram do sexo masculino. A idade média dos pacientes foi de 69 anos. Destes, 16 pacientes foram submetidos ao tratamento CTCTE e 10 pacientes a CTCTE SC. A pressão intraocular (PIO) teve média pré tratamento de 49 ± 23 mmHg no grupo CFCTE e medias no 1º, 30º e 90º dias pós-operatórios respectivamente: 32 ± 24 mmHg, 38 ± 18 mmHg, 43 ± 10 mmHg. No grupo submetido a técnica CFCTE SC a PIO prévia foi 54 ± 16 mmHg e médias no 1º, 30º e 90º dias pós-operatórios respectivamente: 38 ± 22 mmHg, 39 ± 10 mmHg , 44 ± 09 mmHg. A redução da dor foi efetiva em 88,4% pacientes. Durante o pós-operatório foi verificado hiperemia, quemose e hifema. Não foram observadas complicações graves. Conclusão: O tratamento do olho cego doloroso com ciclofotocoagulação transescleral com baixa carga foi um procedimento seguro e eficaz na resolução da dor, mas apresentou um baixo nível de redução da pressão intraocular em ambas técnicas usadas.


Abstract Objective: To evaluate the effectiveness and safety profile of standard transescleral cyclophotocoagulation (CTCTE) and its technical variation of slow cooking (CTCTE SC) in patients with neovascular glaucoma pain. Methods: Patients underwent ophthalmological examination, grading their pain level through a graphical / numerical scale and divided into two groups, one for treatment with CTCTE and another CTCTE SC. Follow-up was performed on the first, thirtieth and ninetieth days. Results: Of the 26 patients included, 11 (42.3%) were male. The average age of the patients was 69 years. Of these, 16 patients underwent CTCTE treatment and 10 patients underwent CTCTE SC. Intraocular pressure (IOP) had a mean pre-treatment of 49 ± 23 mmHg in the CFCTE group and medians at the 1st, 30th and 90th postoperative days respectively: 32 ± 24 mmHg, 38 ± 18 mmHg, 43 ± 10 mmHg. In the group submitted to the CFCTE SC technique, the previous IOP was 54 ± 16 mmHg and averages on the 1st, 30th and 90th postoperative days respectively: 38 ± 22 mmHg, 39 ± 10 mmHg, 44 ± 09 mmHg. Pain reduction was effective in 88.4% patients. During the postoperative period, hyperemia, chemosis and hyphema were observed. No serious complications were observed. Conclusion: Painful blind eye treatment with low load transscleral cyclophotocoagulation was a safe and effective procedure for pain resolution, but presented a low level of intraocular pressure reduction in both techniques used.


Subject(s)
Humans , Male , Female , Aged , Glaucoma, Neovascular/surgery , Glaucoma, Neovascular/complications , Blindness/etiology , Laser Coagulation/methods , Eye Pain/surgery , Sclera/surgery , Prospective Studies , Lasers, Semiconductor/therapeutic use
10.
Acta cir. bras ; 35(12): e351204, 2020. tab, graf
Article in English | LILACS | ID: biblio-1152679

ABSTRACT

Abstract Purpose: To evaluate the effect of diode laser use on experimental orthodontic tooth movements. Methods: Thirty Rattus norvegicus albinus Wistar were divided into three equal groups (n = 10), two experimentals and one control. Applying 20 g orthodontic force were attached to the maxillary incisors of the rats in all groups. Low dose laser was applied to the surrounding tissues of the maxillary incisors of the rats in the experimental groups. Two exposure times for laser irradiation were used for seven days: t = 12 min (energy dose = 72 J) and t = 9 min (energy dose = 54 J) by a 0.1 W DEKA brand diode laser with wavelength of 980 nm. Results: Osteoclastic activation increased in the 72 J group when compared to control group and decreased in comparison to the 54 J group. Osteoblastic activation was decreased in the 72 J group when compared to the control group and increased in comparison to the 54 J group. Conclusions: Applying 54 J laser energy has been found effective to accelerate the orthodontic tooth movement.


Subject(s)
Tooth Movement Techniques , Low-Level Light Therapy , Osteoclasts , Rats, Wistar , Lasers, Semiconductor
11.
Braz. dent. sci ; 23(4): 1-9, 2020. tab, ilus
Article in English | LILACS, BBO | ID: biblio-1121858

ABSTRACT

Objective: This study evaluates the shear bond strength (SBS) and Vickers micro-hardness (VHN) of the orthodontic adhesive resin Transbond XT using thermocycled samples. The study also measures the degree of cure by poliwave light curing unit Valo. Materials and Methods: 135 brackets were bonded for the SBS test, and 90 disc-shaped orthodontic adhesive resins were prepared for the VHN test. The measurements were taken either immediately or after 500 or 10.0000 thermocycling. The SBS and VHN test data were statistically evaluated using a Two-way ANOVA and Tukey multiple comparison tests. The degree of conversion (DC) was measured by FTIR. Results: The 10-sec polymerized control group (57.08) and the 10.000 termocycled samples (55.96) had the highest VHN scores. On the other hand, the 3 second polymerized and the 10.000 termocycled samples (39.22) had the lowest VHN scores. There was no significant difference in the bracket SBS values between the termocycled and immediate groups. An evaluation of the bond failure surfaces revealed that the ARI scores did not differ between the immediate and the thermo-cycled groups according to the power modes. The FTIR results revealed that the lowest DC was seen in the 3 second light-cured sample. Conclusion: TransbondXT provided sufficient bond strength, microhardness and DC under in vitro bracket bonding conditions after 3 and 10 s of Poliwave LED curing. However, low mean values were seen in the groups that received Poliwave LED curing for only 3 s (AU)


Objetivo: Este estudo avalia a resistência ao cisalhamento (SBS) e a microdureza Vickers (VHN) da resina adesiva ortodôntica Transbond XT utilizando amostras termocicladas. O estudo também mede o grau de cura pela unidade de fotopolimerização Valo poliwave. Materiais e Métodos: 135 braquetes foram colados para o teste SBS e 90 discos de resina adesiva ortodôntica foram preparados para o teste VHN. As medições foram feitas imediatamente ou após 500 ou 10.000 ciclos de termociclagem. Os dados dos testes SBS e VHN foram avaliados estatisticamente usando ANOVA 2 fatores e teste de comparação múltipla de Tukey. O grau de conversão (DC) foi medido por FTIR. Resultados: O grupo controle polimerizado por 10segundos (57,08) ciclados por 10.000 ciclos (55,96) tiveram os valores VHN mais altos. Por outro lado, as amostras polimerizadas de 3 segundos e 10.000 ciclos (39,22) os valores de VHN mais baixos. Não houve diferença significativa nos valores de SBS do braquete entre os grupos termociclados e imediato. Uma avaliação das superfícies de falha de adesão revelou que os escores do ARI não diferiram entre os grupos imediato e termociclados de acordo com as densidades de potência. Os resultados do FTIR revelaram que o menor DC foi observado nas amostras fotopolimerizadas de 3 segundos. Conclusão: Transbond XT forneceu suficiente resistência de união, microdureza e DC sob condições de colagem de braquetes in vitro após 3 e 10 s de polimerização em LED Poliwave. No entanto, valores médios baixos foram observados nos grupos que receberam a cura do LED Poliwave por apenas 3 s (AU)


Subject(s)
Orthodontics , Spectroscopy, Fourier Transform Infrared , Shear Strength , Lasers, Semiconductor
12.
Braz. arch. biol. technol ; 63: e20180668, 2020. graf
Article in English | LILACS | ID: biblio-1132159

ABSTRACT

Abstract The aim of this study was to evaluate the in vivo response of red light-emitting diode (LED) on acute lung injury (ALI) in a sepsis model in rats. Twenty rats were randomly allocated into two experimental groups (n=10): Control Sepsis Group (CS); sepsis and red LED group (SRL). The anterior region of the trachea and ventral regions of the chest (below the ribs), bilaterally were irradiated daily for two consecutive days, starting immediately after the surgery using red (630 nm) LED. The histological results showed that in red LED treated group presented a modulation of the lung inflammatory process, less intense alveolar septum thickening and decrease of the inflammatory cells. Moreover, LED significantly reduced the lung injury score and increased interleukin type 10 (IL-10) protein expression compared SG. These results suggest that LED was efficient in attenuating ALI in a sepsis model in rats by reducing inflammatory cells into lung tissue and enhancing the anti-inflammatory cytokine production.


Subject(s)
Animals , Male , Rats , Sepsis/therapy , Low-Level Light Therapy , Lasers, Semiconductor , Acute Lung Injury/therapy , Biomarkers , Rats, Wistar , Disease Models, Animal
13.
Article in English | LILACS, BBO | ID: biblio-1135508

ABSTRACT

Abstract Objective: To discover the perceptions of pediatric patients, their parents and undergraduate Dentistry students of the use of the diode laser in frenectomy surgeries. Material and Methods: A qualitative study was conducted through semi-structured interviews, recorded and transcribed with subsequent content analysis. Twelve healthy children (5-8 years old) who needed a frenectomy were selected and invited, together with their parents, to undergo laser diode surgery. In addition, 28 undergraduate dentistry students were invited to attend the procedures. One week after performing the surgical procedures, the children (Group 1), their parents (Group 2) and the students who attended the procedures (Group 3) were individually interviewed for the thematic analysis. Results: The analysis of the conversations identified three emerging contents: positive thoughts on the use of diode laser; frustrations from the use of diode laser; and aspects related to professional training. Conclusion: The results pointed to the acceptance of surgical laser use in pediatric dentistry; however, the feelings of frustration indicate that its use requires guidance from the child and his/her parents, in addition to careful handling and specific training.


Subject(s)
Pediatric Dentistry , Laser Therapy/instrumentation , Lasers, Semiconductor/therapeutic use , Gingival Diseases/surgery , Labial Frenum/surgery , Perception , Brazil/epidemiology , Qualitative Research
14.
Braz. dent. sci ; 23(3): 1-9, 2020. ilus, tab
Article in English | LILACS, BBO | ID: biblio-1104426

ABSTRACT

Objective: To assess the efficacy of agitation of chlorohexidine (CHX) and Silver nanoparticles "AgNps" with 810nm diode laser or sonic endoactivator compared to side ­vented needle on infected root canals with Enterococcus "E" Faecalis biofilms. Material and Methods: Sixty-five extracted human premolars with single oval canals were instrumented by protaper system up to F3. Biofilms of E. faecalis were generated based on a previously established protocol. Two teeth were used to check the biofilm formation, then the remaining Teeth were randomly divided into three equal experimental groups according to agitation techniques used: group 1 (810 nm diode laser with 1 watt) , group 2 (sonic endoactivator) and group 3 (Side vented needle). Each group was further divided into three equal subgroups according to the irrigant solution into; subgroup A: chlorohexidine, subgroup B: silver nanoparticles and subgroup C: distilled water: Confocal laser scanning microscopy "CLSM" was used to assess bacterial viability. Data were analyzed by appropriate statistical analyses with P = 0.05. Results: Regarding the activation method, all groups had a significantly high percentage of dead bacteria (P < 0.05). However, Laser was significantly the highest and Endoactivator the least (P < = 0.001). Diode laser agitation of AgNps irrigant showed the highest reduction percentage of bacteria (78.1%) with a significant difference with both CHX and water irrigation, Conclusion: Under the condition of the present study; results reinforced that laser activation is a useful adjunct, 810 nm diode laser agitation of AgNps or chlorhexidine was more effective in disinfection of oval root canals than endoactivator and side vented needle techniques. (AU)


Objetivo: Avaliar a eficácia da agitação de clorohexidina (CHX) e nanopartículas de prata (AgNps) , com laser de diodo de 810 nm ou endoativador sônico, em comparação à agulha de ventilação lateral, em canais radiculares infectados com biofilmes de Enterococcus "E"; Faecalis. Material e Métodos: Sessenta e cinco pré-molares humanos com um único canal oval, extraídos, foram instrumentados pelo sistema protaper até F3. Os biofilmes de E. faecalis foram gerados com base em um protocolo previamente estabelecido. Foram utilizados dois dentes para verificar a formação do biofilme, e os dentes restantes foram divididos aleatoriamente em três grupos experimentais iguais, de acordo com as técnicas de agitação utilizadas: grupo 1 (laser de diodo 810 nm com 1 watt), grupo 2 (endoativador sônico) e grupo 3 (Agulha com ventilação lateral). Cada grupo foi dividido em três subgrupos iguais, de acordo com a solução irrigante; subgrupo A: clorohexidina, subgrupo B: nanopartículas de prata e subgrupo C: água destilada: A microscopia confocal de varredura a laser foi usada para avaliar a viabilidade bacteriana. Os dados foram analisados por análises estatísticas apropriadas com P = 0,05. Resultados: Em relação ao método de ativação, todos osgrupos apresentaram percentual significativamente alto de bactérias mortas (P < 0.05). No entanto, para o laser foi significativamente o mais alto e, para oendoativador, o menos alto (P < = 0.001). A agitação com laser de diodo doirrigante AgNps apresentou a maior porcentagem de redução de bactérias (78,1%), com diferença significativa tanto para irrigação com CHX quanto comágua. Conclusão: Sob as condições do presente estudo; os resultadosreforçaram que a ativação a laser é um complemento útil, a agitação por laserde diodo de 810 nm de AgNps ou clorexidina foi mais eficaz na desinfecção dos canais radiculares ovais do que as técnicas de endoativador e agulha com ventilação lateral. (AU)


Subject(s)
Humans , Enterococcus faecalis , Dental Pulp Cavity , Metal Nanoparticles , Lasers, Semiconductor
15.
Rev. ADM ; 76(2): 109-112, mar.-abr. 2019. ilus
Article in Spanish | LILACS | ID: biblio-1009264

ABSTRACT

La desprogramación neuromuscular juega un papel importante en el tratamiento de la disfunción temporomandibular, uno de los principales inconvenientes es el periodo prolongado del tratamiento, lo cual influye en la aceptación del paciente o el abandono del tratamiento. El diagnóstico es crucial para planificar el tratamiento ya que cubre una amplia gama de variables para tratarlo, por lo que en este caso es un paciente dolicofacial, con problemas de disfunción temporomandibular de origen muscular, por lo cual se optó por utilizar laserterapia de bajo nivel como coadyuvante de tratamiento, dando como resultado una mejor aceptación y colaboración de la desprogramación del paciente en un periodo de tiempo más corto (AU)


Neuromuscular deprogramming plays an important role in the treatment of temporomandibular dysfunction, one of the main drawbacks is the prolonged period of treatment, which influences the acceptance of the patient or the abandonment of treatment. The diagnosis is crucial to plan the treatment since it covers a wide range of variables to treat it, so in this case it is a dolichofacial patient, with problems of temporomandibular dysfunction of muscular origin, which is why we chose to use low-level laser therapy, level as a coadjutant of treatment, resulting in a better acceptance and collaboration of the deprogramming of the patient in a shorter period of time (AU)


Subject(s)
Humans , Male , Adolescent , Temporomandibular Joint Dysfunction Syndrome/therapy , Dental Occlusion, Centric , Lasers, Semiconductor/therapeutic use , Occlusal Splints , Dental Articulators , Mexico
16.
Braz. arch. biol. technol ; 62: e19180133, 2019. tab, graf
Article in English | LILACS | ID: biblio-1011525

ABSTRACT

Abstract Quality of life drastically diminished after radiotherapy due to radiation induced oral complications. Fluoride was found to be helpful in decreasing the incidence of radiation caries; however it has not led to elimination of dental caries. Thus, new techniques containing low fluoride concentration or not containing fluoride at all, as laser irradiation, have been studied to prevent the beginning or progression of caries. So the purpose of this study is to investigate the effect of laser surface treatment with or without fluoride on microhardness and ultrastructure of demineralized gamma irradiated enamel; Thirty enamel slabs were allocated into three groups (n=10): G slabs were subjected to gamma irradiation only; GL slabs were subjected to gamma irradiation followed by diode laser and GFL slabs were subjected to gamma irradiation followed by fluoride then diode laser. Slabs were then exposed to demineralizing solution for 72 hours. Examination of slabs was performed using vickers microhardness test and scanning electron microscope; The lowest microhardness was recorded in group G, while inGL and GFL groups it significantly increased. Scanning electron microscope revealed a pronounced loss of central prism core and retention of prism peripheries in group G. Confluence of prismatic and interprismatic structures in GL slabs and irregular rough surface with prismatic boundaries conservation in GFL slabs were detected. Applying laser improved the microhardness and counteracted the adverse effect of gamma radiation. Adding fluoride before laser irradiation had a marked effect on microhardness..


Subject(s)
Humans , Tooth Demineralization/therapy , Dental Enamel/radiation effects , Lasers, Semiconductor/therapeutic use , Fluorides/therapeutic use
17.
J. appl. oral sci ; 27: e20180126, 2019. tab, graf
Article in English | LILACS, BBO | ID: biblio-975877

ABSTRACT

Abstract Objectives: The aim of this in vitro study was to evaluate the bonding strength of non-simplified dentin bonding systems (DBS) to dentin irradiated with a diode laser (970 nm) immediately and after 12 months of water storage following either primer or bond application. Material and methods: The experimental design included three different factors: DBS type [AdperTM Scotchbond Multipurpose (MP) and Clearfil™ SE Bond (CSE)], irradiation [without irradiation - control (C), irradiation after primer application (AP), and irradiation after bond application (AB)], and time [initial (I) and after 12 months of water storage (12 m)]. Sixty sound human third molars (n = 10) were obtained, and their flat occlusal dentin areas were prepared and standardized. Laser irradiation was performed in the contact mode perpendicular to the dental surface over an automatically selected scanning area at a pulse energy of 0.8 W, frequency of 10 Hz, and energy density of 66.67 J/cm2. After 7 days of treatment, the specimens were cut, and half of them were subjected to microtensile testing (500 N/0.05 mm/min), whereas the remaining sticks were examined after 12 months of water storage. The obtained data were analyzed by three-way analysis of variance (ANOVA) followed by a Tukey test (p<0.05). The observed fracture modes were investigated using a portable digital microscope with a magnification of 40x. Results: Among the utilized DBS, MP generally exhibited higher bond strengths, but did not always differ from CSE under similar conditions. The irradiation factor was statistically significant only for the MP/AB groups. After 12 months of storage, all groups demonstrated a significant reduction in the bond strength, whereas the results of fracture analysis showed a predominance of the adhesive type. Conclusions: The laser treatment of non-simplified DBS was not able to stabilize their bonding characteristics after 12 months.


Subject(s)
Humans , Dental Bonding/methods , Dentin-Bonding Agents/radiation effects , Resin Cements/radiation effects , Dentin/radiation effects , Lasers, Semiconductor , Reference Values , Surface Properties/radiation effects , Tensile Strength , Time Factors , Materials Testing , Water/chemistry , Reproducibility of Results , Analysis of Variance , Dentin-Bonding Agents/chemistry , Microscopy, Atomic Force , Resin Cements/chemistry , Dentin/drug effects , Polymerization/radiation effects
18.
Braz. oral res. (Online) ; 33: e084, 2019. graf
Article in English | LILACS | ID: biblio-1019612

ABSTRACT

Abstract This study aimed to evaluate the role of photobiomodulation (PBM) in apexification and apexogenesis of necrotic rat molars with an open apex. Rat molars were exposed to the oral environment for 3 weeks. Canals were rinsed with 2.5% NaOCl and 17% EDTA, filled with antibiotic paste and sealed. After 7 days, canals were rinsed and divided into six groups (n=6): mineral trioxide aggregate (MTA); blood clot (BC); human dental pulp stem cells (hDPSC); MTA+PBM; BC+PBM; and hDPSC+PBM. In hDPSC groups, a 1% agarose gel scaffold was used. Two groups were not exposed: healthy tooth+PBM (n = 6), healthy tooth (n = 3); and one was exposed throughout the experiment: necrotic tooth (n = 3). In PBM groups, irradiation was performed with aluminum gallium indium phosphide (InGaAlP) diode laser for 30 days within 24-h intervals. After that, the specimens were processed for histological and immunohistochemical analyses. Necrotic tooth showed greater neutrophil infiltrate (p < 0.05). Necrotic tooth, healthy tooth, and healthy tooth+PBM groups showed absence of a thin layer of fibrous condensation in the periapical area. All the other groups stimulated the formation of a thicker layer of fibers (p < 0.05). All groups formed more mineralized tissue than necrotic tooth (p < 0.05). PBM associated with MTA, BC, or hDPSC formed more mineralized tissue (p < 0.05). MTA+PBM induced apexification (p < 0.05). Rabbit polyclonal anti-bone sialoprotein (BSP) antibody confirmed the histological findings of mineralized tissue formation, and hDPSC groups exhibited higher percentage of BSP-positive cells. It can be concluded that PBM improved apexification and favored apexogenesis in necrotic rat molars with an open apex.


Subject(s)
Animals , Tooth Diseases/radiotherapy , Dental Pulp Necrosis/radiotherapy , Tooth Apex/radiation effects , Low-Level Light Therapy/methods , Dental Pulp Cavity/radiation effects , Lasers, Semiconductor/therapeutic use , Apexification/methods , Oxides/therapeutic use , Stem Cells , Tooth Diseases/pathology , Immunohistochemistry , Random Allocation , Reproducibility of Results , Treatment Outcome , Rats, Wistar , Silicates/therapeutic use , Calcium Compounds/therapeutic use , Aluminum Compounds/therapeutic use , Dental Pulp Necrosis/pathology , Tooth Apex/pathology , Dental Pulp/cytology , Dental Pulp Cavity/pathology , Drug Combinations , Integrin-Binding Sialoprotein/analysis
19.
Article in English | WPRIM | ID: wpr-762727

ABSTRACT

BACKGROUND: Diode lasers are the gold standard for removing unwanted hair. Lowering the energy should result in less pain and could theoretically affect therapeutic efficacy. This study evaluated the efficacy of an 808-nm diode laser at different fluences for permanent axillary hair removal in Korean women. METHODS: Twenty-four Korean women were divided into two groups. Each patient received laser treatment at both axillae, which were divided into upper and lower parts. Each part received different fluence from an HR808 prototype diode at 1-month intervals: 8, 10, 12, and 14 J/cm². Hair count and thickness were recorded at each follow-up visit and at a 3-month follow-up after the final laser treatment by photography and using a folliscope. At the final visit, pain and patient satisfaction were surveyed. Three plastic surgeons assessed the results on photographs. RESULTS: The mean hair follicle density reduction was 62.18%, 65.28%, 73.08%, and 78.29% on the right upper side, right lower side, left upper side, and left lower side, respectively. The mean hair follicle thickness reduction was 45%, 48%, 54%, and 59% on the right upper side, right lower side, left upper side, and left lower side, respectively. In the plastic surgeons' assessment, the left upper and lower sides scored 2.71. The right upper and lower sides scored 2.38 and 2.04, respectively. CONCLUSIONS: High-fluence (14 J/cm²) treatment with an HR 808 prototype diode laser efficiently removed unwanted hair. No significant difference in comfort was reported compared to the low-fluence mode (8–10 J/cm²).


Subject(s)
Asians , Axilla , Female , Follow-Up Studies , Hair Follicle , Hair Removal , Hair , Humans , Laser Therapy , Lasers, Semiconductor , Patient Satisfaction , Photography , Plastics , Prospective Studies , Surgeons
20.
Rev. odontol. UNESP (Online) ; 48: e20180144, 2019. tab, ilus
Article in Portuguese | LILACS, BBO | ID: biblio-1014406

ABSTRACT

Resumo Introdução A busca por protocolos efetivos para reduzir a incidência de reabsorções radiculares e favorecer a reparação do ligamento periodontal perdido ainda representa um grande desafio, tendo em vista o prognóstico desfavorável dos reimplantes dentais tardios. Objetivo Avaliar, por meio da análise histológica, os efeitos do laser de alta potência e da fotobiomodulação na ocorrência de reabsorção radicular e no reparo periodontal, em dentes reimplantados tardiamente. Material e método Foram utilizados 50 incisivos centrais direitos de ratos Wistar. Após a extração, os espécimes foram divididos em cinco grupos (n = 10): G1 (controle positivo): reimplante imediato; G2 (controle negativo): reimplante tardio (RT): espécimes mantidos em ambiente seco por 60 minutos, sem tratamento adicional; G3: RT associado ao tratamento da superfície radicular com laser diodo de alta potência (810 nm, 1.5 W); G4: RT + superfícies radiculares e feridas alveolares tratadas com fotobiomodulação (laser diodo 660 nm, 30 mW e 780 nm, 40 mW, respectivamente); G5: RT + superfícies radiculares irradiadas com laser de alta e alvéolos com fotobiomodulação, nos mesmos parâmetros que G3 e G4, respectivamente. Após 60 dias, os animais foram eutanasiados. Os espécimes foram processados para análise histológica. Resultado G3 e G5 apresentaram as menores médias de scores com relação à ocorrência de reabsorções radiculares e anquilose, quando comparados a G2 e G4 (Teste Kruskall-Wallis, p<0,05). Com relação ao reparo periodontal, todos os grupos experimentais (G3, G4 e G5) apresentaram médias de escores inferiores (Teste Kruskall-Wallis, p<0,05) comparadas ao G1 e semelhantes ao G2 (Teste Kruskall-Wallis, p>0,05). Conclusão O laser de alta potência, associado ou não à fotobiomodulação, diminuiu a ocorrência das reabsorções radiculares e da anquilose, e a fotobiomodulação não favoreceu o controle das reabsorções radiculares nem o reparo periodontal.


Abstract Introduction The search for effective protocols for a lower incidence of root resorptions reduction and for a favor periodontal repair still represents a great challenge, considering the unfavorable prognostic of the delayed replanted tooth. Objective To evaluate by histologic analyses the effects of high power diode laser and photobiomodulation on the occurrence of root resorption and on the tissue repair of delayed replanted teeth. Material and method Fifty right central incisors of Wistar rats were used. After the extraction, the specimens were assigned to 5 groups (n=10): G1 and G2 were the control groups-with no treatment and they were respectively submitted to immediate and delayed replantation (DR- 60 minutes after the extraction). The other three groups received tissue repair treatment prior the DR: G3 - root surfaces were irradiated with high power laser (810 nm, 1.5 W); G4- root surfaces and the alveolar wounds were irradiated with low power laser (photobiomodulation), respectively with 660 nm, 90 mW and 780 nm, 40 mW; G5- root surfaces were irradiated with high power and the alveolar wound received photobiomodulation with the same parameters used in G3 and G4. After 60 days the animals were euthanized. The specimens were processed for histological analyses. Result The histologic analysis showed lower means values of scores of root reabsorptions and ankylosis in G3 and G5 when compared to G2 and G4 (Kruskall-Wallis test, p>0.05). Regarding the periodontal repair, all the experimental groups (G3, G4 and G5) presented lower means values of scores than G1 (Kruskall-Wallis test, p <0.05) and similar values to G2 (Kruskall-Wallis test, p>0.0.5). Conclusion High power laser reduced the occurrence of root resorption and photobiomodulation did not enhance the tissue healing process in delayed tooth replantation in rats.


Subject(s)
Animals , Male , Rats , Root Resorption , Tooth Avulsion , Tooth Replantation , Lasers, Semiconductor/therapeutic use , Phototherapy , Incidence , Rats, Wistar , Tooth Ankylosis
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