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Lasers in Medical Science

Verónica García-Sanz, Vanessa Paredes-Gallardo, Carlos Bellot-Arcís, Lluís Martínez-León, Rafael Torres-Mendieta, Javier Montero, Alberto Albaladejo
Bonding orthodontic brackets to ceramic materials is a challenging procedure; femtosecond (FS) laser conditioning could provide improved results, but the ideal settings for effective bracket-zirconia bonding have never been established. This study aimed to analyze the differences in surface roughness and shear bond strength (SBS) produced by different femtosecond laser settings and establish a protocol to prepare zirconia surfaces for optimal adhesion to metal orthodontic brackets. One hundred eighty zirconia samples were assigned to six groups according to surface treatment: (1) control; (2) air-particle abrasion (APA); (3) FS laser irradiation (300 mW output power, 60 μm inter-groove distance); (4) FS laser irradiation (200 mW, 100 μm); (5) FS laser irradiation (40 mW, 60 μm); and (6) FS laser irradiation (200 mW, 60 μm)...
July 18, 2018: Lasers in Medical Science
Ghassem Ansari, Hanane Safi Aghdam, Pardis Taheri, Mitra Ghazizadeh Ahsaie
The aim of this systematic review and subsequent meta-analysis was to elaborate the efficacy of laser pulpotomy over the formocresol pulpotomy of human primary teeth. Published materials in the MedLine were looked for through "PUBMED" and "PUBMED CENTRAL". The MESH terms of "Laser", "Pulpotomy", "Primary teeth", and "Children" were used to carry the search from the years 1999 to 2017. Collected data were assessed by four investigators using inclusion and exclusion criteria in order to select those studies with precise method targeted...
July 17, 2018: Lasers in Medical Science
Elisabetta Sorbellini, Mariangela Rucco, Fabio Rinaldi
Benefit deriving from the use of light is known since ancient time, but, only in the last decades of twentieth century, we witnessed the rapid expansion of knowledge and techniques. Light-emitted diode (LED)-based devices represent the emerging and safest tool for the treatment of many conditions such as skin inflammatory conditions, aging, and disorders linked to hair growth. The present work reviews the current knowledge about LED-based therapeutic approaches in different skin and hair disorders. LED therapy represents the emerging and safest tool for the treatment of many conditions such as skin inflammatory conditions, aging, and disorders linked to hair growth...
July 14, 2018: Lasers in Medical Science
Ting Li, Xiaolin Zhang, Hong Shi, Zhe Ma, Bingjian Lv, Meng Xie
The aim of this meta-analysis was to systematically evaluate the applications of Er:YAG lasers for the removal of caries and cavity preparation in children. The meta-analysis was performed according to the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) and was conducted with data extracted from seven relevant randomized controlled trials (RCTs) published from 1997 to July 2017. The data heterogeneity of each study was assessed by a Q test. We used the heterogeneity results to calculate the standard mean difference (SMD) or relative risk (RR) and 95% confidence interval (95%CI) using STATA version 10...
July 12, 2018: Lasers in Medical Science
Yuji Tsuka, Ryo Kunimatsu, Hidemi Gunji, Kengo Nakajima, Aya Kimura, Tomoka Hiraki, Ayaka Nakatani, Kotaro Tanimoto
Low-level laser therapy has become one of the fastest growing fields of medicine in recent years. Many in vivo and in vitro studies have shown that laser irradiation activates a range of cellular processes in a variety of cell types and can promote tissue repair. However, few in vitro experiments have evaluated the effects of laser irradiation on cells in real time. The purpose of this study was to examine the effects of neodymium-doped yttrium aluminum garnet (Nd:YAG) laser irradiation on the migration of cultured human osteoblasts...
July 12, 2018: Lasers in Medical Science
Wen Zhang, Xingjian Cheng, Huizheng Li, Mo Cao
To evaluate the therapeutic effect of micro-plasma radio frequency on hypertrophic scars in rabbit ears to provide an experimental basis and theoretical foundation for the treatment of hypertrophic scars. Hypertrophic scars were established on the ventral surface of the ears of six New Zealand white rabbits. Left and right ears were randomly divided into two groups: experimental group treated with micro-plasma radio frequency and control group with no treatment. H&E staining and CD34 labeling of microvessels were performed to analyze ear specimens, and immunohistochemical staining was conducted to detect IL-8 and MCP-1 in the scars...
July 12, 2018: Lasers in Medical Science
Isabela Parsekian Martins, Renato Parsekian Martins, Sergei Godeiro Fernandes Rabelo Caldas, Ary Dos Santos-Pinto, Peter H Buschang, Hermes Pretel
The objective of this research was to compare the effect single low-level laser therapy (LLLT) irradiation on pain perception in patients having fixed appliance treatment in the clinic of orthodontics. Sixty-two patients were recruited to participate in this randomized, double-blinded, placebo-controlled study. The patients were assigned to four groups: group I-laser on the right side; group II-placebo on the right side; group III-laser on the left side; group IV-placebo on the left. The laser or placebo was applied before separation, 24 and 48 h after separation of their first permanent molars in the lower arch...
July 12, 2018: Lasers in Medical Science
J Dong, S G Peng, X Y Zhang, C G Tong, F Liu, M Cao, Y H Li, Y L He
Pyogenic granuloma (PG) is a common benign vascular proliferation which often occurs on the head, neck, hands, and feet. Among the various treatment options for PG, surgical excision is the most effective treatment which offers the lowest overall recurrence rates and also provides the exact diagnosis. However, it could have difficulties to do the surgery when lesions are located on the fingers and toes, especially very near to the nails, so laser may be a very good alternative choice. In this article, we evaluated the clinical efficacy and safety of neodymium-yttrium aluminum garnet (Nd:YAG) laser for treatment of PG located on the fingers and toes...
July 11, 2018: Lasers in Medical Science
Ligiane Souza Dos Santos, Joyce Camilla Saltorato, Marina Gaiato Monte, Rodrigo Labat Marcos, Rodrigo Álvaro Brandão Lopes-Martins, Shaiane Silva Tomazoni, Ernesto Cesar Pinto Leal-Junior, Rodrigo Leal de Paiva Carvalho
Physical exercise generates several benefits in a short time in patients with diabetes mellitus. However, it can increase the chances of muscle damage, a serious problem for diabetic patients. Nonsteroidal anti-inflammatory drugs (NSAIDs) are widely used to treat these injuries, despite the serious adverse effects. In this way, photobiomodulation therapy (PBMT) with low-level laser therapy (LLLT) and/or light emitting diode therapy (LEDT) can be used as an alternative in this case. However, its efficacy in tissue repair of trauma injuries in diabetes mellitus until now is unknown, as well as the combination between PBMT and NSAIDs...
July 10, 2018: Lasers in Medical Science
Laís Lima Pelozo, Reinaldo Dias Silva-Neto, Silmara Aparecida Milori Corona, Regina Guenka Palma-Dibb, Aline Evangelista Souza-Gabriel
Root-filled teeth that received fiber posts most frequently fail at the adhesive interface between resin cement and dentin. The objective of this study is to evaluate the effect of Er:YAG laser and/or sodium ascorbate (SA) on bond strength, microhardness of dentin, and penetration depth of cement into dentinal tubules. Forty-eight bovine incisor roots were endodontically treated, post spaces were prepared and equally divided into four groups (n = 12): G1-distilled water (control); G2-10% SA (10 min); G3-Er:YAG laser (150 mJ/4 Hz/40 s), and G4-Er:YAG laser + 10% SA...
July 9, 2018: Lasers in Medical Science
Antonis Kallis, Kosmas Tolidis, Paris Gerasimou, Dimitrios Dionysopoulos
The purpose of this study was to evaluate the thickness and qualitative characteristics of the hybrid layer after two cavity preparation methods, using Er:YAG laser in QSP mode and conventional carbide burs. Additionally, two different adhesive techniques were investigated using etch-and-rinse and self-etch adhesive systems. Sixty sound human third molars were used and were randomly divided into four groups (n = 15). In the first two groups, large (4 mm length, 3 mm wide, and 3 mm deep) class I cavities were prepared using Er:YAG laser (2...
July 8, 2018: Lasers in Medical Science
Amirhossein Mirhashemi, Nasim Chiniforush, Hanieh Jadidi, Nastaran Sharifi
This study investigated the effect of Er:YAG (smart 2940 Dplus, DEKA, Italy) and Er:CrYSGG (Waterlase iPlus, Biolase, USA) lasers on the shear bond strength (SBS) between the orthodontic brackets and dental porcelain in comparison with conventional acid etching with 9% hydrofluoric acid (HF, Ultradent, USA). A total of 60 specimens of maxillary incisor crown were prepared and randomly assigned to five groups; each group was subjected to a different porcelain surface conditioning: (1) etching with the 9% HF for 2 min; (2) etching with the 9% HF for 2 min followed by irradiation with the Er:CrYSGG laser (3-W power, 10-Hz frequency for 10 s); (3) etching with the 9% HF for 2 min followed by irradiation with the Er:YAG laser (3-W power, 10-Hz frequency for 10 s); (4) Irradiation with the Er:CrYSGG laser (3-W power, 10-Hz frequency for 10 s without acid etching) and (5) irradiation with the Er:YAG laser (3-W power,10-Hz frequency for 10 s without acid etching)...
July 6, 2018: Lasers in Medical Science
P Betancourt, A Merlos, J M Sierra, O Camps-Font, J Arnabat-Dominguez, M Viñas
Bacteria living in biofilms exhibit altered growth phenotypes, while the biofilm provides benefits, the foremost of which is a certain protection against both immune system and killing effect by antimicrobials. Laser-activated irrigation (LAI) and passive ultrasonic irrigation (PUI) have been proposed as alternative methods for cleaning and disinfecting the root canal, as an adjuvant to conventional chemo-mechanical preparation in order to improve debridement and disinfection. Nevertheless, the potential antibacterial effect of LAI using 0...
July 6, 2018: Lasers in Medical Science
Juan Manuel Ruvalcaba-López, Teodoro Córdova-Fraga, Guadalupe de la Rosa-Alvarez, Blanca Olivia Murillo-Ortiz, Juan Carlos Martínez-Espinosa, Rafael Guzmán-Cabrera, Jesús Bernal-Alvarado
Iron molecule is of great importance in the synthesis of hemoglobin which is essential for oxygen transport. Iron levels are quantified by accurately high sensitivity tests, such as serum ferritin (SF). However, common studies to quantify SF are long and strenuous (~ 5 h), for example enzyme-linked immunosorbent assay (ELISA). In this paper, blood serum samples were analyzed by Raman spectroscopy (RS), and a computational analysis of spectra is proposed to detect differences in SF as an alternative procedure...
July 6, 2018: Lasers in Medical Science
Paula Corrêa Silveira da Silva, Nelson Pereira Marques, Marcella Tassi Farina, Thais Marchini Oliveira, Cristiane Duque, Nádia Carolina Teixeira Marques, Vivien Thiemy Sakai
This study aimed to analyze the effects of laser irradiation on the membrane integrity and viability of stem cells from human exfoliated deciduous teeth (SHED) that were kept in serum starvation. Nutritional deficit was used to mimic the cellular stress conditions of SHED isolation for regenerative dental approaches, where laser therapy could be beneficial. SHED were cultured under serum starvation (MEMα + 1%FBS) for 1 or 24 h pre-irradiation (protocols A and B, respectively). Then, cells received low-level laser therapy (LLLT; 660 nm) at 2...
July 6, 2018: Lasers in Medical Science
Mohadeseh Heidari, Reza Fekrazad, Farhad Sobouti, Mohammad Moharrami, Salman Azizi, Hanieh Nokhbatolfoghahaei, Maziar Khatami
The aim of this study was to evaluate the efficacy of low-power of 940-nm diode laser on post-operative pain after undisplaced flap surgery. This randomized clinical trial study was conducted using a split-mouth design. The study participants comprised 30 patients who needed periodontal flap surgery for periodontal pockets on the same tooth on both sides of the mandible. One side of the mandible was subjected to undisplaced flap surgery plus treatment with a 940-nm diode laser, and on the contralateral side, the surgery was conducted without applying the laser...
July 6, 2018: Lasers in Medical Science
Jehan Alsharnoubi, Kamal El-Sayed Shoukry, Mary Wadie Fawzy, Omnia Mohamed
Burn scars are known for their tendency to worsen with hypertrophy and contracture, causing esthetic and functional problems. The objective is to analyze the effectiveness of low-level laser therapy on post-burn hypertrophic scar tissue in children. A randomized controlled study included 15 children, ranging from 2 to 10 years of age, presented with post-burn hypertrophic scars. They received He-Ne laser and topical treatment. Each scar was divided into two halves. One half was treated with laser therapy and topical treatment (study area), and the other half was treated with topical treatment only (control area)...
July 4, 2018: Lasers in Medical Science
Luisa Zupin, Ilaria Caracciolo, Paola Maura Tricarico, Giulia Ottaviani, Pierlanfranco D'Agaro, Sergio Crovella
No abstract text is available yet for this article.
July 3, 2018: Lasers in Medical Science
Khatereh Khorsandi, Elham Chamani, Ghader Hosseinzadeh, Reza Hosseinzadeh
Curcumin and salicylic acid are both phenolic compounds and they can both affect cancer treatment efficacy. In this study, the effects of methylene blue-curcumin (CU-MB) and methylene blue-salicylic acid (SA-MB) ion pair complexes on MDA-MB-231 human breast cancer cells are studied. According to the thermodynamic parameters, the stability of curcumin and salicylic acid complexes ion pair complexes was compared. The free energy of ion pair interactions was calculated based on binding constants. A comparison of the free energies of the complexes (CU-MB: ∆G° b1  = - 21...
June 30, 2018: Lasers in Medical Science
Marco Giannelli, Daniele Bani
No abstract text is available yet for this article.
June 30, 2018: Lasers in Medical Science
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