Laser Therapy

Background and Aims: Dental caries is a global concern and different materials and methods were proposed for its prevention.The aim of this study was evaluation of the effect of different demineralizing agents with and without diode laser radiation on the microhardness of primary molars enamel. Materials and Methods: 48 primary molar teeth were used in this study. The enamel blocks were prepared. Primary microhardness values were also measured. All samples were demineralized, then demineralization was approved by a DIAGNOdent pen...

The aim of this study was to test the application in vitro of different laser wavelengths at a low fluence in combination or not with proper photosensitizing dyes on Candida albicans biofilm with or without a synthetic killer decapeptide (KP). Candida albicans SC5314 was grown on Sabouraud dextrose agar plates at 37°C for 24 h. Cells were suspended in RPMI 1640 buffered with MOPS and cultured directly on the flat bottom of 96-wells plates. The previously described killer decapeptide KP was used in this study...

Background: Photobiomodulation presents stimulatory effects on tissue metabolism, constituting a promising strategy to produce bone tissue healing. Objective: the aim of the present study was to investigate the in vivo performance of PBM using an experimental model of cranial bone defect in rats. Material and Methods: rats were distributed in 2 different groups (control group and PBM group). After the surgical procedure to induce cranial bone defects, PBM treatment initiated using a 808 nm laser (100 mW, 30 J/cm2 , 3 times/week)...

Background and aim: Polychromatic light is actively used in medicine. However, its oncological safety and effect against cytotoxic therapy remains poorly studied. Multiple myeloma (MM) develops in the bone marrow and therefore malignant plasma cells are inaccessible to direct exposure to light. The aim of our work was to study the influence of polychromatic visible and infra-red light (pVIS + pIR) on growth and sensitivity of the myeloma cells to the cytotoxic effect of drug bortezomib (BTZ) through systemic mechanism...

No abstract text is available yet for this article.

BACKGROUND AND AIMS: Acupuncture has become a substantial part of medical practice in Switzerland. So far, only few cases of accidental tattoo after acupuncture have been reported, which were all caused by acupuncture needles that had been left in the skin and led to local argyrosis. CASE: We report the case of a 31-year-old female who developed gray-brown macules after acupuncture. Over 5 months, she had received acupuncture on the same spots one to two times per week and the macules had gradually become darker and had increased in size...

BACKGROUND AND AIMS: Nowadays, studies show the effective laser irradiation role on the adhesion of bonding agents to the dentin. Therefore, the present study was set to find an appropriate protocol for the use of Nd:YAG, Er:YAG, and Diode lasers during the application of two steps self-etch adhesives in direct dental restorations in order to achieve higher microtensile strength. MATERIALS AND METHODS: A total number of 100 extracted healthy teeth were selected...

BACKGROUND: The aim of the study was to compare preservation of pulp vitality by indirect pulp treatment with calcium hydroxide, calcium silicate based cement (Biodentine) and Er,Cr:YSGG laser in permanent molars. MATERIALS AND METHODS: 30 patients were selected for this study as per the inclusion and exclusion criteria in the age group of 6-14 years and then randomly allocated to three groups A, B & C. In group A, after caries excavation, calcium hydroxide (Dycal) was placed at the floor...

AIM: The aim of this study was to evaluate and compare caries removal by Er,Cr:YSGG Laser and conventional method using Air-rotor handpiece in primary teeth. MATERIALS AND METHODS: 25 children with at least two class I carious lesions on primary teeth with Diagnodent readings not differing more than ± 10 for both teeth were included in the study. All 50 teeth in the study received treatment by the same operator. Time taken for caries removal was recorded using a timer...

Background and aims: Chronic pain is a significant health care problem which is often encountered in medical institute out-patient clinics . In previous studies we have reported on the benefits of low level laser therapy (LLLT) for chronic musculoskeletal pain patients. The present study is a report on the effects of LLLT in patients with pain in major muscles which govern the motion of two joints (2-joint muscles). Materials and methods: Over the past 5 years, 19 subjects visited our out-patient clinic with complaints of pain in 2-joint muscles (biceps brachii muscle or gastrocnemius muscle)...

Background and Aim: We have previously reported improvement of clinical symptoms of genitourinary syndrome of menopause (GSM) at 3 and 6 months following three CO2 laser treatments. The current paper presents the results of long term follow up at 12, 15- and 18-months post laser treatment. Methods: Twenty subjects (mean age 60.65 ± 6.34 years) who had completed the core study participated in follow-up. Subjects were evaluated at 12, 15, and 18 months following final laser therapy...

Background and aims: The prevalence of pathogenic E scherichia coli as well as E. coli O157 and antibiotic- resistant bacteria has increased. This study aimed to examine the effect of methylene blue (MB) with sodium bicarbonate (NaHCO3 ) against E. coli using photodynamic antimicrobial chemotherapy (PACT). Materials and methods: MB was basified using NaHCO3 . E. coli and basic MB were smeared on the culture media followed by irradiation using a red light-emitting diode (LED) at 660 nm...

Endoscopic Submucosal Dissection (ESD) has been increasingly accepted as a minimally invasive treatment for the patients with early gastrointestinal cancers. However, reliable ESD technique demands high maneuverability, and the success of the operation is dependent on each operator's skill. We have developed a novel laser endoscopic system for ESD to overcome such technique-related difficulties. Compared to conventional ESD using electrosurgical knives, an ESD method using the CO2 laser offers the advantages of less risk of perforation and the prevention of extensive thermal damage, because the CO2 laser is strongly absorbed by water...

No abstract text is available yet for this article.

Background and Aims: The emergence of drug-resistant infections is a global problem. Acinetobacter baumannii has attracted much attention over the last few years because of resistance to a wide range of antibiotics. Applying new non-antibiotic methods can save lives of many people around the world. Antimicrobial photodynamic therapy (aPDT) technique can be used as a new method for controlling the infections. In this study we investigated the effect of aPDT on the expression of pathogenic genes in colistin-resistance A...

Background and Aims: Er:YAG laser has become optional for enamel and dentin preparation for a decade. However, it is unclear if Er:YAG laser is acceptable for enamel conditioning prior to an application of a pit-and-fissure sealant. This in vitro study thus aimed to investigate shear bond strength of a sealant to enamel etched with Er:YAG laser, as well as to demonstrate an alteration of enamel surface after the laser was applied. Materials and Methods: One hundred and twenty extracted human premolars were divided into 4 groups (N = 30 per group) in which the enamel surfaces were treated with 1) 37% phosphoric acid, 2) Er:YAG laser 80 mJ/pulse, 2 Hz, 3) Er:YAG laser 120 mJ/pulse, 10 Hz, and 4) Er:YAG laser 140 mJ/pulse, 2 Hz...

Background and Aims: Allergic rhinitis annually reach epidemic proportions in Japan. Approximately 30 to 40% of the population suffers from allergic rhinitis during the spring season. Symptoms comprise rhinorrhea, nasal congestion, and sneezing accompanied by irritation and itching of the eyes. The Ohshiro Clinic started using the conventional Nd:YAG laser for the treatment of allergic rhinitis in 1993, and from 2005 we started using a diode laser-pumped Nd:YAG laser. From 2010, we adopted a novel 810 nm diode laser, and the present retrospective study examined the efficacy rate of the treatment of allergic rhinitis in the 2018 season with this system, compared with a previous study in 2011...

Antibacterial Photodynamic therapy (APDT) is a process utilizing light and light sensitive agents (named photosensitizer (PS)) and is usually applied in an oxygen-rich environment. The energy of the photons is absorbed by the photosensitizer and subsequently transferred to surrounding molecules. Consequently, reactive oxygen species and free radicals are formed. These oxidative molecules can damage bacterial macromolecules such as proteins, lipids and nucleic acids and may result in bacterial killing. Unlike antibiotics, APDT as a novel technique does not lead to the selection of mutant resistant strains, hence it has appealed to researchers in this field...

Background and Aims: Facial rejuvenation has become an increasingly patient-driven procedure with speedy but significant results and minimal downtime being the holy grail of both patient and practitioners. Fractional techniques with both laser and radiofrequency sources have attracted attention with some good results, but still with some downtime. Combination therapy could offer the best points of the separate techniques to give synergistic results with minimal downtime. The present pilot mini-study investigated the safety and efficacy of facial rejuvenation with a combination of microneedling fractional radiofrequency (MFR) and fractional minimally-invasive thulium laser (FTL) treatment...

BACKGROUND AND AIMS: Bioglass (BG) and Magnesium (Mg) composites have been used for bone tissue engineering proposes due to its osteogenic activity and increased mechanical properties respectively. The introduction of Collagen (Col) is a common and efficient approach for bone tissue engineering applications toward cell proliferation. Recently, studies demonstrated that BG/Col/Mg composites presented proper mechanical properties and were non-cytotoxic. Although the osteogenic potential of BG/Col/Mg composites, in specific situations, biomaterials may not be capable of stimulating bone tissue...