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Tissue Injury: Inflammation and Repair

Tissue Injury: Inflammation and Repair

Following injury, the integrity of the injured tissues must be reestablished. For example, in skin tissue, wound repair involves coordination among resident skin cells, blood mononuclear cells, extracellular matrix, growth factors, and cytokines to complete the healing cascade.
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In case of deep injuries, trauma to blood vessels results in blood loss. In the meantime, phospholipids released from the ruptured endothelial cellular membrane are converted into arachidonic...

Healing I: Introduction

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Healing is the physiological process by which the body restores the integrity and function of damaged tissues following injury. It involves a coordinated interplay of cellular proliferation, extracellular matrix remodeling, and growth factor signaling. The extent and nature of the tissue damage determine whether healing occurs by resolution, regeneration, or replacement.ResolutionResolution represents the most complete form of healing, occurring when the injury is minimal and tissue...

Overview of Regeneration and Repair

Overview of Regeneration and Repair

Regeneration and repair processes are critical in healing damages caused by injury, disease, and aging. In regeneration, the damaged tissue is entirely replaced with new growth that restores the original architecture and function. In contrast, tissue repair usually results in a fixed tissue architecture involving scar formation. Scars generally do not reestablish tissue function and may also exhibit structural abnormalities at the injury site.
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Phases of Wound Repair

Phases of Wound Repair

Following injury, the integrity of the injured tissues must be reestablished. For example, in skin tissue, wound repair involves coordination among resident skin cells, blood mononuclear cells, extracellular matrix, growth factors, and cytokines to complete the healing cascade.
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Healing II: Complications

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...

Inflammatory Response II: Inflammatory Exudate and Tissue Repair

Inflammatory Response II: Inflammatory Exudate and Tissue Repair

The immune system's inflammatory response destroys the invading pathogen, permitting the tissue to heal. The changes during the cellular and vascular stages allow exudate formation at the site of inflammation. The inflammatory exudate released from the wound has high protein content and a specific gravity above 1.020.
The typical wound exudate is odorless, transparent, straw-colored, thin, and watery. Exudate, however, can differ depending on the state of wound healing. Likewise, the exudate's...

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Related Experiment Video

Updated: Jul 9, 2026

Assessment of Acute Wound Healing using the Dorsal Subcutaneous Polyvinyl Alcohol Sponge Implantation and Excisional Tail Skin Wound Models.

Assessment of Acute Wound Healing using the Dorsal Subcutaneous Polyvinyl Alcohol Sponge Implantation and Excisional Tail Skin Wound Models.

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Tissue injury and healing.

Brent Kincaid¹, John P Schmitz

¹Department of Oral and Maxillofacial Surgery, United States Air Force Academy, 10th Medical Group/SGDDH, USAFA, 4102 Pinion Drive, Colorado Springs, CO 80840, USA. bk2thman@yahoo.com

Oral and Maxillofacial Surgery Clinics of North America

|December 20, 2007

Summary

This primer focuses on wound healing biochemistry for oral surgeons, emphasizing healing timelines and cell types over molecular details. Understanding diverse injury patterns aids in functional and cosmetic reconstruction, especially for military personnel.

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Area of Science:

Biochemistry
Oral and Maxillofacial Surgery
Wound Healing

Background:

Clinical relevance of wound healing biochemistry for oral and maxillofacial surgeons.
Importance of time frames, tissue growth, and cell types in the healing process.
Less critical focus on molecular composition and fiber interaction at the tissue level.

Purpose of the Study:

To provide a primer on wound healing biochemistry tailored for oral and maxillofacial surgeons.
To correlate biochemical aspects of healing with clinical treatment considerations.
To analyze various injury patterns and their implications for reconstruction.

Main Methods:

Review of biochemical principles of wound healing.
Categorization of diverse injury patterns (lacerations, blunt/penetrating trauma, blast, ballistic injuries).
Emphasis on clinical goals of functional and cosmetic reconstruction.

Main Results:

Identification of critical healing factors: time, tissue growth, and cell types.
Description of various injury types and their reconstructive challenges.
Utilization of military injury data to understand evolving wound patterns.

Conclusions:

Biochemical understanding of wound healing is crucial for effective surgical treatment planning.
Diverse injury patterns necessitate tailored approaches for optimal functional and cosmetic outcomes.
Military medicine research provides valuable insights into modern warfare-related injuries and healing.