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Related Concept Videos

Reticular Dermis01:15

Reticular Dermis

The papillary and reticular dermis are the two layers of the dermis. They are made of connective tissue with fibers of collagen extending from one to the other, making the border between the two somewhat indistinct. The dermal papillae extending into the epidermis belong to the papillary layer, whereas the dense collagen fiber bundles below belong to the reticular layer.
Reticular Layer
Underlying the papillary layer is the much thicker reticular layer, composed of dense, irregular connective...
Tissue Renewal without Stem Cells01:23

Tissue Renewal without Stem Cells

After cellular or tissue damage, the resident stem cells present in the human body can locally repair and regenerate the damaged tissue or organ. However, even though some tissues do not have stem cells, they can repair and regenerate with the help of pre-existing cells. For example, beta cells of the pancreas and hepatocytes of the liver can divide to renew and regenerate the tissue. Here, both cell division and cell death are well regulated by homeostasis.
However, failure of such a system...
Renewal of Skin Epidermal Stem Cells01:12

Renewal of Skin Epidermal Stem Cells

The skin is divided into epidermis, dermis, and hypodermis, the skin's outermost, middle, and inner layers. The human epidermal layer regularly undergoes renewal, where old, dead cells are replaced by new cells. Epidermal stem cells or EpiSCs divide and differentiate to restore the lost cells. For the renewal process, some EpiSCs continuously self-renew. In contrast, few others differentiate into transit-amplifying cells, which later form prickle or spinous cells, followed by granular cells,...
Healing II: Complications01:24

Healing II: Complications

Complications during healing arise when tissue repair is altered by local or systemic factors. These changes involve abnormal collagen deposition, altered biomechanics, and reduced vascular supply, impairing restoration of normal structure and function.Loss of FunctionScar tissue differs significantly from the original tissue it replaces. In the skin, fibrosis lacks adnexal structures such as hair follicles, sebaceous glands, and sweat glands. Their absence reduces tactile sensitivity, impairs...
Elastin is Responsible for Tissue Elasticity01:12

Elastin is Responsible for Tissue Elasticity

Elastic fiber contains the protein elastin along with lesser amounts of other proteins and glycoproteins. The main property of elastin is that it will return to its original shape after being stretched or compressed. Elastic fibers are prominent in elastic tissues found in skin and the elastic ligaments of the vertebral column.
Ligaments and tendons are made of dense regular connective tissue, but in ligaments not all fibers are parallel. Dense regular elastic tissue contains elastin fibers and...
The Effect of Aging on Tissues01:19

The Effect of Aging on Tissues

Several body functions deteriorate with age. The external signs of aging are easily identifiable. For example, the skin becomes dry, less elastic, and thins out, forming wrinkles. The skin of the face begins to appear looser due to a decrease in the levels of elastic and collagen fibers in the connective tissue. Additionally, melanin production in the hair follicle decreases with age, resulting in gray hair. Moreover, the senses of sight and hearing decline, so glasses and hearing aids may...

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Enhancement of Facial Rejuvenation Through a Combination of 1565 nm Non-Ablative Fractional Laser with 30% Supramolecular Salicylic Acid
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Enhancement of Facial Rejuvenation Through a Combination of 1565 nm Non-Ablative Fractional Laser with 30% Supramolecular Salicylic Acid

Published on: September 27, 2024

Skin tightening.

Heather Woolery-Lloyd, Jenna N Kammer

    Current Problems in Dermatology
    |August 26, 2011
    PubMed
    Summary

    Skin tightening treatments use radiofrequency (RF), ultrasound, or light devices to address skin laxity by heating the dermis. This process stimulates collagen production and contraction, leading to improved skin elasticity and firmness.

    Area of Science:

    • Aesthetic medicine and dermatology
    • Cosmetic procedures
    • Dermatologic surgery

    Background:

    • Skin laxity is characterized by decreased elasticity, connective tissue loosening, and deepening folds, particularly noticeable in submental and submandibular areas.
    • Both intrinsic aging and extrinsic factors like UV radiation contribute to the development of skin laxity.
    • The aging process leads to a loss of skin elasticity and structural integrity.

    Purpose of the Study:

    • To provide a comprehensive overview of various skin tightening devices.
    • To explain the mechanisms of action for different skin tightening technologies.
    • To discuss the application of energy-based devices in treating skin laxity.

    Main Methods:

    • Review of radiofrequency (RF), ultrasound, and light-based devices for skin tightening.

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    Roller Microneedle Combined with Tranexamic Acid Solution in Treating Melasma
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    Published on: January 19, 2024

  • Explanation of the thermal effects on dermal collagen.
  • Discussion of collagen contraction and remodeling processes.
  • Main Results:

    • Skin tightening devices target and heat the dermis to induce collagen contraction.
    • Dermal heating leads to immediate collagen denaturation and contraction.
    • Long-term collagen remodeling and new collagen synthesis contribute to sustained skin tightening effects.

    Conclusions:

    • Radiofrequency, ultrasound, and light-based devices are effective modalities for treating skin laxity.
    • The primary mechanism involves thermal stimulation of collagen for skin tightening.
    • These technologies offer solutions for improving skin elasticity and reducing signs of aging.