Comparative Evaluation of the Effects of Ultrasonic and Ultraviolet irradiation on Tissue Regeneration

El-batouty, M. F.; El-gindy, M.; El-shawaf, I.; Bassioni, N.; El-Ghaweet, Atef; El-Emam, Ali A.

doi:10.3109/03009748609098208

Cited by 17 publications

(8 citation statements)

References 1 publication

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“…1D, arrow). In a number of studies, it has been established that ultrasound intensities from 0.1 to 0.5 W/cm 2 accelerate the repair phase in wounded tissues (Young and Dyson, 1990;Taskan et al, 1997;El-Batouty et al, 1986). 1E).…”

Section: Resultsmentioning

confidence: 99%

“…The data demonstrate that L929 cell cultures submitted to low-intensity ultrasonic irradiation (0.2e0.6 W/ cm 2 ) maintained shape and cellular integrity, thereby corroborating the results of Hsieh (2006). In a number of studies, it has been established that ultrasound intensities from 0.1 to 0.5 W/cm 2 accelerate the repair phase in wounded tissues (Young and Dyson, 1990;Taskan et al, 1997;El-Batouty et al, 1986).…”

Section: Resultsmentioning

confidence: 99%

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Assessment of fibroblast cells submitted to ultrasonic irradiation

Oliveira¹,

Oliveira²,

Machado³

et al. 2008

Cell Biology International

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Physiotherapists consider ultrasound an indispensable tool, which is commonly employed in clinical practice as a treatment aid for musculoskeletal dysfunctions. The aim of our study has been to analyze fibroblast cell structures following low-intensity pulsed ultrasonic irradiation. Fibroblast cell cultures irradiated with ultrasound were analyzed through electron microscopy to determine an ideal irradiation beam that preserved cell morphology and integrity. Analysis by fluorescence microscopy and transmission electron microscopy was used to follow morphological changes of the nucleus and cytoskeleton following different ultrasound irradiation intensities. According to the parameters used in the pulsed irradiation of fibroblast cultures, control over the intensity employed is fundamental to the optimal use of therapeutic ultrasound. Cell cultures submitted to low-intensity pulsed ultrasonic irradiation (0.2-0.6 W/cm2) at 10% (1:9 duty cycle) and 20% (2:8 duty cycle) maintained shape and cellular integrity, with little damage. In the group irradiated with an intensity of 0.8 W/cm2, a loss of adhesion was observed along with an alteration in the morphology of some cells at an intensity of 1.0 W/cm2, which resulted in the presence of cellular fragments and a decrease of adhering cells. In cells irradiated at 2.0 W/cm2, there was a complete loss of adhesion and aggregation of cellular fragments. The present study confirms that biophysical properties of pulsed ultrasound may accelerate proliferation processes in different biological tissues.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Assessment of fibroblast cells submitted to ultrasonic irradiation

Oliveira¹,

Oliveira²,

Machado³

et al. 2008

Cell Biology International

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“…In some animal studies, researchers found that ultrasound at the intensities of 0.1 W/cm 2 and 0.5 W/cm 2 accelerates the inflammatory phase of repair [6,9,35]. This reported accelerated repair agrees with the findings from several other suggestions that low-dose ultrasound of approximately 0.5 W/cm 2 pulsed with a frequency of 1 or 3 MHz promotes wound healing [34][35][36][37]. Our treatment protocol included pulsed ultrasound with a dose of 0.5 W/cm 2 at a frequency of 1 MHz for 5 days in the ultrasound group, a protocol that was applied in most studies.…”

Section: Discussionmentioning

confidence: 99%

Comparison of the effects of laser and ultrasound treatments on experimental wound healing in rats

Demir¹,

Yaray²,

Kırnap³

et al. 2004

JRRD

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-A randomized controlled study investigated the effects of ultrasound and laser treatments on wound healing in rats. The duration of the inflammatory phase decreased with both laser and ultrasound treatments; however, laser was more effec-tive than ultrasound, with more significant results. The prolifera-tion phase showed, for both treatments, an increase in the level of hydroxyproline and the number of fibroblasts, as well as stimula-tion of the collagen synthesis and the composition. Laser treat-ment was again more effective than ultrasound. The wound breaking strength was significantly higher with both treatments, and no statistically significant difference emerged between the laser and ultrasound groups, although laser treatment provided a much greater increase in the wound breaking strength than ultra-sound. Both treatments have beneficial effects on the inflamma-tory, proliferation, and maturation phases of wound healing. Both can be used successfully for decubitis ulcers and chronic wounds, in conjunction with conventional therapies such as debridement and daily wound caring. However, laser treatment was more effective than ultrasound in the first two phases of wound healing.

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“…[38][39][40][41][42] In addition, collagen deposited after US treatment is stronger and better organized. [39][40][41][42][43][44] Not surprisingly, tissue treated with US progresses through the phases of healing more rapidly. 39 Chemical mediators produced after US treatments include tissue growth factors, which, in turn, mediate the activation of intracellular signaling pathways.…”

Section: Physical Therapymentioning

confidence: 98%

Therapeutic potential of low-intensity ultrasound (part 1): thermal and sonomechanical effects

et al. 2008

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In this first part of the review, we will focus on and discuss various aspects of low-intensity ultrasound (US), with emphasis on mild thermal effects, apoptosis induction, and sonomechanical effects. Mild thermal effects of US have been commonly applied to physical therapy. Though US has clear beneficial effects, the advantage of using US over other heating modalities remains unclear. US has also been used in vivo and clinically in the treatment of wounds and fractures, with promising results. On the biomolecular level, studies have shown that US can induce apoptosis and that certain conditions can provide optimal apoptosis induction. As to potential therapeutic applications, in addition to the thermal and other physical effects, apoptosis induction by US may offer direct and rapid treatment of tumors or cancer tissues. Technological advances and rapidly accelerating research in this field are providing an ever-increasing array of therapeutic options for lowintensity US.

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Comparative Evaluation of the Effects of Ultrasonic and Ultraviolet irradiation on Tissue Regeneration

Cited by 17 publications

References 1 publication

Assessment of fibroblast cells submitted to ultrasonic irradiation

Assessment of fibroblast cells submitted to ultrasonic irradiation

Comparison of the effects of laser and ultrasound treatments on experimental wound healing in rats

Therapeutic potential of low-intensity ultrasound (part 1): thermal and sonomechanical effects

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