**Question:** Type of primary healing among the following is/are:

A. Wound healing by first intention
B. Wound healing by secondary intention
C. Wound healing by tertiary intention
D. Wound healing by autoerythrosis

**Correct Answer:** A. Wound healing by first intention

**Core Concept:**
Wound healing is a complex process that occurs after an injury, involving various cellular and molecular events aimed at restoring the integrity of the damaged tissue. There are three main types of healing: primary, secondary, and tertiary healing.

**Why the Correct Answer is Right:**
Primary healing (A), also known as first intention healing, refers to a type of healing where the edges of the wound adhere closely together, forming a scar without the formation of a granulation tissue. This type of healing occurs in small, clean, and tension-free wounds, such as those from minor lacerations, abrasions, or small degloving injuries. The healing process is characterized by a rapid re-epithelialization and contracture formation, leading to a smaller scar.

**Why Each Wrong Option is Incorrect:**

B. Wound healing by secondary intention (secondary healing) occurs when there is a significant wound size or contamination, and the formation of granulation tissue is essential. In this type of healing, the wound edges separate, and granulation tissue forms, followed by re-epithelialization. This leads to a larger scar.

C. Wound healing by tertiary intention (tertiary healing) is a rare form of healing that takes place when the wound is very large, deep, or contaminated, and primary and secondary healing are not feasible. In this case, the wound edges separate, granulation tissue forms, and then epithelialization occurs. Tertiary healing results in an even larger scar than secondary healing.

D. Wound healing by autoerythrosis (autoerythrosis is not a recognized term in wound healing, and this option is incorrect.)

**Clinical Pearls:**
Understanding the different types of wound healing is essential in clinical practice, as choosing the appropriate type of healing can influence the size, quality, and aesthetic outcome of the final scar. In selecting the most suitable healing method, the size, depth, location, and contamination of the wound must be considered.