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CO2 laser

K S Frahm, O K Andersen, L Arendt-Nielsen, C D Mørch
Objective The objective of this study was to test if offset analgesia could be evoked using a noncontact thermal stimulator. Offset analgesia [J. Neurophysiol. 87:2205-2208, 2002] is defined as an unproportionally large decrease in pain intensity following a slight decrease in stimulation intensity. The importance of differences in thermal properties between human hairy and glabrous skin was investigated. Methods A 20W diode laser (970 nm) was used for the thermal stimulation. A fast (50 images/s) infrared camera measured the skin temperature and a temperature controlled feedback control loop adjusted the laser power...
December 29, 2017: Scandinavian Journal of Pain
Pierpaolo Di Giminiani, Lars J Petersen, Mette S Herskin
Background and aim Cutaneous inflammation induced by ultraviolet B-light (UV-B) is considered a valuable translational pain model. Until now, the development of primary hyperalgesia has been assessed predominantly in rodents, whereas porcine skin might be advantageous due to its greater homology with human skin. The aim of the present study was to investigate porcine behavioural responses to nociceptive mechanical and thermal stimulations following UV-B inflammation. Methods One skin area of 4 cm2 in the flank of 16 male pigs of 55 ± 6 kg was irradiated by UV-B using 3xMED (Minimum Erythema Dose)...
December 29, 2017: Scandinavian Journal of Pain
Elisabeth Datz, Carmen Schönberger, Florian Zeman, Michael Koller, Mark Berneburg, Michael Landthaler, Sigrid Karrer, Ulrich Hohenleutner, Silvia Hohenleutner
BACKGROUND: Fractional ablative resurfacing is frequently used for treating atrophic and acne scars as well as for the early improvement of scars after surgery. No evidence-based clinical data on improving the appearance of skin grafts by fractional CO2 -laser resurfacing have been available so far. OBJECTIVES: The primary outcome parameter was the adaptation of the skin graft to the surrounding skin 2, 6, and 12 months after the second laser treatment. Secondary outcome parameters were melanin variation, skin roughness, resizing of the skin graft, and patient satisfaction with cosmetic results...
June 17, 2018: Lasers in Surgery and Medicine
Amira A Abdel Azim, Rania T Salem, Rania Abdelghani
BACKGROUND: Multiple treatment modalities were introduced for treatment of hidradenitis suppurativa (HS) but mostly with unsatisfactory results. OBJECTIVE: In this prospective randomized right-left intra-individual controlled study, we studied the safety and efficacy of combined treatment with fractional CO2 laser and long pulsed Nd : YAG (1064 nm) laser in treatment of HS. METHODS: Twenty adult patients with HS were randomized into this study...
June 16, 2018: International Journal of Dermatology
Yunhe Zhao, Haoshuo Chen, Nicolas K Fontaine, Jiaxiong Li, Roland Ryf, Yunqi Liu
We demonstrate broadband and low-loss three-mode and six-mode scramblers employing CO2 -laser inscribed long-period gratings (LPGs) for space-division multiplexing. Step-index (SI) few-mode fibers are used to avoid mode coupling to the cladding modes. We characterize the mode scramblers using a swept-wavelength interferometer. Mode-dependent loss (MDL) and modal transfer matrices over the C+L band are presented. Demonstrated LPGs with negligible MDL and low insertion loss contributed to high-performance CO2 -laser inscription...
June 15, 2018: Optics Letters
Kinga Grzech-Leśniak, Jacek Matys, Dorota Żmuda-Stawowiak, Krzysztof Mroczka, Marzena Dominiak, Aldo Brugnera Junior, Reinhard Gruber, Georgios E Romanos, Anton Sculean
OBJECTIVE: To evaluate the effects of bracket removal using an erbium laser on the pulp temperature and enamel surface. BACKGROUND: Removal of orthodontic brackets with conventional debonding pliers may result in enamel cracks. To avoid damage to the enamel surface and effectively remove metal or ceramic brackets, different types of lasers, such as Nd:YAG, CO2 , TM:YAP, diode laser, or Er:YAG, have been introduced for debonding. MATERIALS AND METHODS: A total of 55 brackets (n = 55; 20 metal and 35 ceramic ones) were bonded to 55 caries-free premolars extracted for orthodontic indications...
June 15, 2018: Photomedicine and Laser Surgery
Jennifer Zuccaro, Inga Muser, Manni Singh, Janelle Yu, Charis Kelly, Joel Fish
Treatment with laser therapy has the potential to greatly improve hypertrophic scarring in individuals who have sustained burn injuries. More specifically, recent research has demonstrated the success of using pulsed dye laser therapy to help reduce redness and postburn pruritus and using ablative fractional CO2 laser therapy to improve scar texture and thickness. This study describes our early experience using laser therapy in our pediatric burn program and details our specific treatment approach when using each laser individually and in combination during the same procedure...
April 20, 2018: Journal of Burn Care & Research: Official Publication of the American Burn Association
Bridget E McIlwee, Tina S Alster
BACKGROUND: Cosmetic tattoos such as eyeliner, brow liner, and lip liner have become increasingly popular in the United States and throughout the world. For a variety of reasons, patients frequently regret their tattoos and request their removal; however, removal is often complicated by the aesthetically sensitive location of these specialized tattoos and the fact that they often contain white metallic compounds that darken on pigment-specific laser irradiation. OBJECTIVE: To review the clinical use, effectiveness, and safety of an ablative laser technique for cosmetic tattoos...
June 8, 2018: Dermatologic Surgery: Official Publication for American Society for Dermatologic Surgery [et Al.]
Paul Gittens, Gregory Mullen
PURPOSE: To examine the outcomes of sexual function in postmenopausal women and women with a history of breast cancer treated with endocrine therapy who were experiencing the symptoms of GSM for which they were treated with fractional microablative CO2 laser. MATERIALS AND METHODS: From July 2015 to October 2016, a retrospective chart review of women who underwent fractional microablative CO2 laser therapy (MonaLisa Touch, DEKA) for GSM was conducted. Several validated questionnaires were used to assess changes in symptoms and sexual function including the Female Sexual Function Index (FSFI), the Wong-Baker Faces Scale (WBFS), and the Female Sexual Distress Scale-Revised (FSDSR)...
June 8, 2018: Journal of Cosmetic and Laser Therapy: Official Publication of the European Society for Laser Dermatology
Martin J C van Gemert, Paul R Bloemen, Wei-Yong Wang, Cees W M van der Geld, Rudy M M A Nuijts, Hayri Hortoglu, Albert Wolkerstorfer, Daniel M de Bruin, Ton G van Leeuwen, H A Martino Neumann, Martine J Jager
BACKGROUND AND OBJECTIVES: A 36-year-old woman underwent CO2 laser resurfacing for periocular rhytides using protective stainless steel Cox II ocular shields. Immediately after the treatment, corneal lesions were seen in both eyes. The left eye subsequent developed corneal ulceration and scarring, a deformed iris, cataract, and lower eye lashes showing signs of acute burns. The right cornea had a small inferior mid-peripheral superficial lesion and concomitant lower mid-peripheral burned eye lashes...
June 8, 2018: Lasers in Surgery and Medicine
Farnaz Hashemian, Hoda Jafari Moez, Mohamad Ali Seif Rabiei, Javaneh Jahanshahi
Introduction: Halitosis and foreign body sensation are two common and disturbing symptoms of chronic caseous tonsillitis (CCT). The aim of this study was to compare the efficacy and safety of temperature-controlled radiofrequency (TC-RF) tonsil ablation with CO2 -laser cryptolysis (CO2 -LC) in the treatment of patients with halitosis caused by CCT. Materials and Methods: Sixty-two patients who suffered from halitosis and/or foreign body sensation due to CCT were enrolled in the present randomized clinical trial, and were randomly assigned into two groups...
May 2018: Iranian Journal of Otorhinolaryngology
Rachidi Alaoui Siham, Zeriouel Asmae
Laryngocele is rare; it is an abnormal dilatation of the laryngeal appendix or of the Morgagni's ventricular pouch. Its size is variable. When it is small, it is usually asymptomatic. When it is large, it can manifest as a cervical anterolateral paralaryngeal mass. Diagnosis is based on CT scan. Treatment approach is still discussed. Endoscopic CO2 laser treatment has aroused great interest in recent years. We here report the clinical observation of a 24-year old woman with a 4-year history of intermittent dyspnea...
2018: Pan African Medical Journal
Fotini Vrani, Elena Sotiriou, Elisabeth Lazaridou, Efstratios Vakirlis, Nikolaos Sideris, Eirini Kirmanidou, Zoe Apalla, Amilios Lallas, Demetrios Ioannides
BACKGROUND: Topical methyl-aminolevulinate photodynamic therapy (MAL-PDT) with 3 hours incubation is recommended as a field directed treatment. Skin pretreatment with ablative CO2 fractional laser (AFXL) prior to MAL-PDT enhances drug penetration and could minimize incubation time. OBJECTIVES: To evaluate and compare the safety and the preventive effect in the development of new non-melanocytic skin cancers (NMSCs) of AFXL-assisted MAL-PDT with one hour incubation with that of conventional MAL-PDT in patients with clinical and histological signs of field cancerization...
June 4, 2018: Journal of the European Academy of Dermatology and Venereology: JEADV
Syed Raza Ali, Maher Al Hejji, Mohammad Homoud
Since its first use in 1963 by Engr. Kumar Naranbhai Patel, carbon dioxide (CO2) laser has evolved to attain a vital role in surgical neurology. The utilisation of laser is increasing in neurosurgery, especially minimally invasive and functional procedures. The laser serves three important functions in surgical procedures: photo-coagulation, photo-vaporisation, and photo-activation. Due to its favorable properties, CO2 laser is now recommended for many neurosurgical procedures. The development of low profile, and flexible transfer media has facilitated the use of laser in micro-neurosurgical procedures...
June 2018: Journal of the College of Physicians and Surgeons—Pakistan: JCPSP
Dina-Wahied El Assal, Ali-Mohamed Saafan, Dina-Hassan Moustafa, Marwa-Adel Al-Sayed
Background: The aim of this study was to evaluate the effect of combining fractional CO2 LASER and nanohydroxy apatite on surface microhardness and color of enamel with initial defects. Material and Methods: Two types of nano hydroxylapatite (nHAP) was prepared; Pure hydroxyapatite (nHA) and Fluoro hydroxyapatite (nFHA), Sixty extracted premolar teeth without visible caries or structural defects on enamel surface were used, immersed in 10 ml of a demineralizing solution for 2 weeks to create artificial white spot lesions, they were randomly allocated into two groups; Group 1: nHA, Group 2: nFHA, each group is then subdivided into 2 subgroups (A and B) where two different in vitro remineralization procedures have been performed, the first procedure utilizes a 10 wt% nHA aqueous slurries only, the second was first exposed to irradiation from a fractional CO2 laser then (nHAP) was applied...
May 2018: Journal of Clinical and Experimental Dentistry
Fereshteh Shafiei, Maryam Saadat, Zahra Jowkar
Background: This study evaluated the effect of three different silanes and post-silanization treatments on the retentive strength of fiber posts luted with an etch-and-rinse resin cement. Material and Methods: One hundred intact maxillary central incisors were randomly divided into 10 groups after endodontic treatment and post space preparation (n=10). The fiber posts were etched using 24% hydrogen peroxide. Posts of the control group did not receive silane. In nine experimental groups, each of the three silanes used, Scotchbond Universal adhesive, Bis-Silane and Porcelain Primer, was subjected to three treatments: air-drying at 25°C, warm air-drying and CO2 laser heat treatment...
May 2018: Journal of Clinical and Experimental Dentistry
A Smirnov, V M Yasinskii, D S Filimonenko, E Rostova, G Dietler, S K Sekatskii
In scanning near-field optical microscopy, the most popular probes are made of sharpened glass fiber attached to a quartz tuning fork (TF) and exploiting the shear force-based feedback. The use of tapping mode feedback could be preferable. Such an approach can be realized, for example, using bent fiber probes. Detailed analysis of fiber vibration modes shows that realization of truly tapping mode of the probe dithering requires an extreme caution. In case of using the second resonance mode, probes vibrate mostly in shear force mode unless the bending radius is rather small (ca...
2018: Scanning
Jordina Munrós, Maria-Angeles Martínez-Zamora, Dolors Tàssies, Juan Carlos Reverter, Mariona Rius, Meritxell Gracia, Cristina Ros, Francisco Carmona
STUDY OBJECTIVE: To evaluate serial generation of microparticles (MPs) after laparoscopic stripping or CO2 laser vaporization in surgical treatment of patients with ovarian endometrioma (OE). DESIGN: A prospective, randomized, blinded, pilot study, including 30 patients (Canadian Task Force I). SETTING: Tertiary university hospital from December 2014 to July 2016. PATIENTS: 30 women with unilateral OE undergoing laparoscopic surgery...
May 24, 2018: Journal of Minimally Invasive Gynecology
V I Sharobaro, Yu V Ivanov, D N Panchenkov, A V Baranov, A A Penaev, Yu A Stepanova, O P Romanets, S A Penaeva, S M Alimova
AIM: To assess the role of CO2-laser in treatment of various scars and to determine the indications for its application. PATIENTS AND METHODS: It has been carried out a prospective analysis of treatment of 218 patients with scars of different duration, locations and anatomic areas with the use of CO2-laser for the period 2011-2017. POSAS scale and sonography were used for analysis. RESULTS: 1. Laser therapy is not effective for scarring-related functional defects (contractures, ectropion, microstomia), when surgery is indicated...
2018: Khirurgiia
Ahmed El Gamal, Etienne Medioni, Jean Paul Rocca, Carlo Fornaini, Nathalie Brulat-Bouchard
Background and aims: The purpose of this study is to determine the effect of CO2 laser irradiation in comparison with sandblasting (Sb), hydrofluoric acid (Hf) and silane coupling agent (Si) on shear bond strength (SBS) of resin cement to CAD/CAM ceramics bonded to dentin. Material and Methods: Forty-eight (CAD/CAM) ceramic discs were prepared and grouped by material, i.e. lithium disilicate (Emax CAD) and zirconia ceramic (Emax ZirCAD), distributed into four different groups: group A, lithium disilicate (Li) CO2 /HF/Si; group B, Li: HF/Si; group C, zirconia (Zr) CO2 /Sb/Si; group D, Zr: Sb/Si...
March 31, 2018: Laser Therapy
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