scholarly journals Effects of different settings for 940 nm diode laser on expanded suture in rats

2019 ◽  
Vol 89 (3) ◽  
pp. 446-454 ◽  
Author(s):  
Gul Tas Deynek ◽  
Sabri Ilhan Ramoglu
Keyword(s):  
Diode Laser ◽  
Energy Levels ◽  
Favorable Effect ◽  
Control Group ◽  
Significance Level ◽  
Low Level ◽  
Low Level Laser ◽  
Level Laser ◽  
Laser Group ◽  
High Level

ABSTRACT Objectives: To evaluate the effects of the Indium Gallium Arsenide Phosphoride (InGaAsP) diode laser at different energy levels on orthopedically expanded midpalatal sutures of rats. Materials and Methods: Eighty Wistar rats were randomly divided into four groups: a control group and low-, moderate-, and high-level laser groups with amounts of energy irradiated at 0 J, 18 J, 42 J, and 60 J, respectively. Each group was divided into two subgroups (n = 10) according to the schedule of sacrifice (7 and 21 days). Laser application (940 ± 10 nm, 0.1 W) was completed twice weekly until sacrifice. The number of osteoblasts (OB), osteocytes (OC), and vessels (V); area of connective tissue (CT); inflammation (IN); and newly formed bone (NB); as well as the ratio of newly formed bone to the total bone area (N/T) were evaluated statistically at a significance level of P < .05. Results: For the low-level laser group, OB, NB, and N/T were significantly higher, and CT was lower, on both the 7th and 21st days. The amount of OC was significantly higher in the low-level laser group compared with the control group on the 7th day and the control and high-level laser groups on the 21st day. The IN was significantly higher for the high-level group on the 21st day compared with other groups. Both the moderate-level and high-level laser groups possessed fewer vessels than the low-level laser group on the 21st day. Conclusions: The InGaAsP laser at the low dosage induced a favorable effect on bone formation in the orthopedically expanded midpalatal suture of rats.

scholarly journals The effects of different doses of 670 nm diode laser on skin flap survival in rats

2012 ◽  
Vol 27 (2) ◽  
pp. 155-161 ◽  
Author(s):  
Cristiano Schiavinato Baldan ◽  
Amélia Pasqual Marques ◽  
Alessandra Maria Schiavinato ◽  
Raquel Aparecida Casarotto
Keyword(s):  
Laser Therapy ◽  
Diode Laser ◽  
Skin Flap ◽  
Point Group ◽  
Low Level Laser Therapy ◽  
Control Group ◽  
Low Level ◽  
Low Level Laser ◽  
Level Laser ◽  
Skin Flap Survival

PURPOSE: To investigate the effects of different low-level laser therapy (LLLT) doses on random skin flap rats. METHODS: Forty Wistar rats were randomly divided in four groups. The control group (CG) was not irradiated. The experimental groups were irradiated with a diode laser 670 nm with different energies per point: group 2 (G2) with 0.06 J; group 3 (G3) 0.15 J and group 4 (G4) 0.57 J. The three groups were irradiated in 12 equally distributed points in the cranial skin flap portion. They were submitted to the irradiation during the immediate, first and second postoperative days. The necrosis area was evaluated in the seventh postoperative day. RESULTS: The CG shows 49.35% of necrosis area in the skin flap; G2, 39.14%; G3, 47.01% and G4, 29.17% respectively. There was a significantly difference when G4 was compared with CG`s skin flap necrosis area. CONCLUSION: The low-level laser therapy diode 670 nm with 0.57 J energy per point increases the survival in randomic skin flap rats.

Assessment of healing of dental implant surgical site following Low-Level Laser Therapy using Bio-Clinical parameters: An Exploratory Study

2020 ◽  
Author(s):  
VARSHA PALLED ◽  
DR. JITENDRA RAO ◽  
DR. RAGHUWAR DAYAL SINGH ◽  
DR. SHUCHI TRIPATHI ◽  
DR. KALPANA SINGH ◽  
...  
Keyword(s):  
Laser Therapy ◽  
Test Group ◽  
Low Level Laser Therapy ◽  
Control Group ◽  
Clinical Parameters ◽  
Implant Stability ◽  
Low Level ◽  
Implant Stability Quotient ◽  
Low Level Laser ◽  
Level Laser

The purpose of this study was to evaluate whether Low-Level Laser Therapy (LLLT) improves the healing of the implant surgical site with clinical and biochemical parameters.Thirty patients with an edentulous space spanning a single tooth were selected. The patients were randomly allocated to two groups - the control group and the test group. The test group received laser energy at a power of 2J/cm 2 with a total of 4-6J energy over each implant. Clinical parameters (Implant Stability Quotient, probing index, modified sulcus bleeding index)and osteoprotegerin (OPG) were assessed at baseline and follow-up intervals (2 weeks, 6 weeks, and 3 months).The test group showed significantly higher implant stability quotient compared to thecontrol group at 2 weeks(57.93±3.95 and 35.67±3.08; p<0.01) and 3months(58.86±3.75 and 67.06±3.78; p<0.01). A significant rise in OPG levels of the test group(686.30±125.36pg/ml at baseline and 784.25±108.30pg/ml at 3months;p<0.01) was seen contrary to significant decline in the control group (839.50±249.08pg/ml at baseline,415.30±78.39pg/ml at 3months;p<0.01). Within the limitations of the study, the study suggests that the healing of peri-implant hard and soft tissues may be enhanced with the use of LLLT as an explicit modality during the post-operative period.

scholarly journals High-level evidence exists for low-level laser therapy on chemoradiotherapy-induced oral mucositis in cancer survivors

2013 ◽  
Vol 19 (3) ◽  
pp. 195 ◽  
Author(s):  
SenthilP Kumar ◽  
Krishna Prasad ◽  
Kamalaksha Shenoy ◽  
Mariella D′Souza ◽  
VijayaK Kumar
Keyword(s):  
Cancer Survivors ◽  
Laser Therapy ◽  
Oral Mucositis ◽  
Low Level Laser Therapy ◽  
Low Level ◽  
Low Level Laser ◽  
Level Laser ◽  
High Level

scholarly journals Experimental model for low level laser therapy on ischemic random skin flap in rats

2006 ◽  
Vol 21 (4) ◽  
pp. 258-262 ◽  
Author(s):  
Rodrigo Paschoal Prado ◽  
Richard Eloin Liebano ◽  
Bernardo Hochman ◽  
Carlos Eduardo Pinfildi ◽  
Lydia Masako Ferreira
Keyword(s):  
Laser Therapy ◽  
Experimental Model ◽  
Diode Laser ◽  
Skin Flap ◽  
Low Level Laser Therapy ◽  
Low Level ◽  
Low Level Laser ◽  
Level Laser ◽  
Group 2 ◽  
Group 1

PURPOSE: To develop an experimental model to be used in the study of low level Laser therapy on viability of random skin flap in rats. METHODS: The sample was 24 Wistar-EPM rats. The random skin flap measured 10 x 4 cm and a plastic sheet was interposed between the flap and donor site. Group 1 (control) underwent sham irradiation with diode laser (830 nm). Group 2 was submitted to laser irradiation with diode laser (830 nm). The animals were submitted to Laser therapy with 36 J/cm² energy density (72 seconds) immediately after the surgery and on the four subsequent days. The probe was usually held in contact with the skin flap surface on a point at 2.5 cm cranial from the flap base. On the seventh postoperative day, the percentage of necrotic area was measured and calculated. RESULTS: Group 1 reached an average necrotic area of 48.86%, Group 2 - 23.14%. After the statistic analysis, compared with the control group, Group 2 showed a statistically significant increase in survival area (p<0.001). CONCLUSION: The experimental model proved to be reliable to be used in the study of effects of low level laser therapy in random skin flap in rats.

Effect of Low-Level Laser Irradiation on Stability and Marginal Bone of Narrow Implants Retaining Overdentures in Moderately Controlled Diabetic Patients

2019 ◽  
Vol 45 (5) ◽  
pp. 391-397
Author(s):  
Moustafa Abdou ELsyad ◽  
Abdelrahman Elsaid Abdraboh ◽  
Mona M. Aboelnagga ◽  
Rami Maher Ghali ◽  
Ingy Talaat Lebshtien
Keyword(s):  
Laser Irradiation ◽  
Small Diameter ◽  
Control Group ◽  
Diabetic Patients ◽  
Implant Stability ◽  
Marginal Bone Loss ◽  
Low Level ◽  
Low Level Laser ◽  
Level Laser ◽  
Low Level Laser Irradiation

The researchers investigated the influence of low-level laser irradiation (LLLI) on implant stability and marginal bone of small-diameter implants retaining mandibular overdentures in patients with moderately controlled diabetes. Twenty patients (mean age = 59.32 ± 4.1 years) with moderately controlled diabetes mellitus (glycated hemoglobin A1c [HbA1c] = 8.1%–10.0 %) were rehabilitated by maxillary and mandibular conventional dentures. Two small-diameter implants (3 × 12 mm) were inserted in the canine areas of the mandible and immediately loaded by mandibular dentures. In a split-mouth design, LLLI was applied to 1 of the 2 implants in a random order (study group [SG]); the other implant was left as a control (control group [CG]). For each patient, gallium aluminum-arsenide diode low-level laser (940-nm wavelength, 0.50 ± 2 mW output power, 0.004 cm2 spot size; Epic, Biolase, Inc, San Clemente, Calif) was applied around each implant with total delivered energy of 90 J (equally divided by 6 irradiation points) in 3 sessions. The application was done immediately after implant insertion, 3 days and 1 week after surgery. Implant stability (measured by Periotest) and marginal bone loss (MBL; measured by cone beam computerized tomography) were evaluated at implant loading (T1), 6 months (T6), and 12 months (T12). One implant failed in the CG and no failures occurred in the SG, resulting in 95% and 100% survival rates, respectively. The SG recorded higher Periotest values than the CG at all observation times. However, the difference was significant (P = .039) at T6 only. The SG recorded lower MBL values than the CG. No difference in MBL was detected between groups or peri-implant sites (mesial, distal, buccal, and lingual) at T6 and T12. Within the limits of this study, LLLI had no effect on marginal bone around immediately loaded small-diameter implants retaining overdentures in patients with moderately controlled diabetes. However, it was beneficial in improving implant stability 6 months after overdenture insertion.

Comparison of quality of facial scars after single low-level laser therapy and combined low-level with high-level (PDL 595 nm) laser therapy

2015 ◽  
Vol 28 (4) ◽  
pp. 201-209 ◽  
Author(s):  
Jana Vranova ◽  
Eva Remlova ◽  
Helena Jelinkova ◽  
Jozef Rosina ◽  
Tatjana Dostalova
Keyword(s):  
Laser Therapy ◽  
Low Level Laser Therapy ◽  
Low Level ◽  
Low Level Laser ◽  
Level Laser ◽  
High Level

Improvement of dairy cow embryo yield with low level laser irradiation

2017 ◽  
Vol 20 (2) ◽  
pp. 307-312 ◽  
Author(s):  
G. Palubinskas ◽  
V. Žilaitis ◽  
R. Antanaitis
Keyword(s):  
Laser Irradiation ◽  
Dairy Cow ◽  
Test Group ◽  
Control Group ◽  
Low Level ◽  
Low Level Laser ◽  
Embryo Yield ◽  
Level Laser ◽  
Conventional Methods ◽  
Low Level Laser Irradiation

Abstract The goal of this study is to estimate the effects of low-level laser irradiation (LLLI) on the superovulatory response according to the number of corpora lutea (CL), follicles (F) and the embryo yield. In recent years, while searching for new, more efficient and organic methods to improve superovulatory response and embryo yield with respect to the conventional methods, low-level laser irradiation (LLLI) is a more sensitive and less costly technology that can be used to improve animal reproduction, namely, artificial insemination and the embryo production system. The dairy-cow donors were treated for superovulation with Pluset®, at any time during the oestrus cycle, and the total dose per donor was 700 IU. The first group of the donors (n=25), test group (TG), was irradiated on the sacroiliac area for 180 seconds per day, from the 1st to 11th superovulatory treatment (ST) days in a row, with LLLI in the 870-970-nm wavelength, 65.93 J/cm dose, frequencies in the 20-2000 Hz range and pulse durations commonly in the range of about 1 second. For the second control group (CG) (n=25), the ST was performed without LLLI. After the ST, The mean number of CL in the right side ovaries in the TG was 25.43% (p<0.05) greater than in those of the CG. The number of total recovered and transferable embryos was greater in the TG compared with the CG by 28.97% (p<0.05) and 15.8% (p>0.05), respectively. With respect to conventional methods, LLLI can be used to improve the superovulatory response and embryo yield as a supplementary environment and animal-friendly method of treatment.

scholarly journals Effect of low-level laser (Ga-Al-As 655 nm) on skeletal muscle fatigue induced by electrical stimulation in rats

2006 ◽  
Vol 101 (1) ◽  
pp. 283-288 ◽  
Author(s):  
Rodrigo Álvaro B. Lopes-Martins ◽  
Rodrigo Labat Marcos ◽  
Patrícia Sardinha Leonardo ◽  
Antônio Carlos Prianti ◽  
Marcelo Nicolas Muscará ◽  
...  
Keyword(s):  
Creatine Kinase ◽  
Electrical Stimulation ◽  
Muscle Contractions ◽  
Muscular Fatigue ◽  
Low Level Laser Therapy ◽  
Control Group ◽  
Low Level ◽  
Low Level Laser ◽  
Level Laser ◽  
Significant Difference

We investigated whether low-level laser therapy (LLLT) can reduce muscular fatigue during tetanic contractions in rats. Thirty-two male Wistar rats were divided into four groups receiving either one of three different LLLT doses (0.5, 1.0, and 2.5 J/cm2) or a no-treatment control group. Electrical stimulation was used to induce six tetanic muscle contractions in the tibial anterior muscle. Contractions were stopped when the muscle force fell to 50% of the initial value for each contraction (T50%). There was no significant difference between the 2.5 J/cm2 laser-irradiated group and the control group in mean T50% values. Laser-irradiated groups (0.5 and 1.0 J/cm2) had significantly longer T50% values than the control group. The relative peak force for the sixth contraction in the laser-irradiated groups were significantly higher at 92.2% (SD 12.6) for 0.5 J/cm2, 83.2% (SD 20.5) for 1.0 J/cm2, and 82.9% (SD 18.3) for 2.5 J/cm2 than for the control group [50% (SD 15)]. Laser groups receiving 0.5 and 1.0 J/cm2 showed significant increases in mean performed work compared with both the control group and their first contraction values. Muscle damage was indirectly measured by creatine kinase levels in plasma. A distinct dose-response pattern was found in which 1.0 and 2.5 J/cm2 LLLT groups had significantly lower creatine kinase levels than the 0.5 J/cm2 LLLT group and the control group. We conclude that LLLT doses of 0.5 and 1.0 J/cm2 can prevent development of muscular fatigue in rats during repeated tetanic contractions.

scholarly journals EFFECTS OF LOW LEVEL LASER IRRADIATION (LLLI) WITH 904nm PULSED DIODE LASER ON OSTEOBLASTS: A CONTROLLED TRIAL WITH THE RAT OSTEOBLAST MODEL

LASER THERAPY ◽  
1996 ◽  
Vol 8 (4) ◽  
pp. 223-231 ◽  
Author(s):  
Ki-Suk Kim ◽  
Jung-Ken Kim ◽  
Se-Won Kim ◽  
Jun-Hee Lee ◽  
Yun-Ki Kim ◽  
...  
Keyword(s):  
Laser Irradiation ◽  
Diode Laser ◽  
Controlled Trial ◽  
Low Level ◽  
Low Level Laser ◽  
Level Laser ◽  
Rat Osteoblast ◽  
Low Level Laser Irradiation
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