Which of the following is the least favorable form of repair after root fracture?
**Core Concept**
A root fracture is a crack in the root of a tooth, often caused by trauma or excessive force. The goal of repair is to preserve the tooth and prevent further damage. The type of repair depends on the location and severity of the fracture.
**Why the Correct Answer is Right**
The least favorable form of repair after a root fracture is an **apicoectomy**. An apicoectomy involves removing the tip of the root (apex) and sealing the remaining root with a filling material. This procedure is often performed when the fracture is close to the apex of the root and there is a risk of infection or root resorption. However, an apicoectomy can lead to root shortening, which can compromise the tooth's stability and increase the risk of future problems.
**Why Each Wrong Option is Incorrect**
* **Option A:** A **root end resection** is a more extensive procedure than an apicoectomy, but it is generally considered a better option for repairing root fractures because it removes the entire fractured portion of the root.
* **Option B:** A **coronal split** is a type of root fracture that occurs in the crown of the tooth, and it is not directly related to the type of repair after a root fracture.
* **Option D:** A **crown** is a type of dental restoration that covers the entire tooth, but it is not a form of repair after a root fracture.
**Clinical Pearl / High-Yield Fact**
When it comes to root fractures, the location and severity of the fracture are critical factors in determining the best course of treatment. In general, the closer the fracture is to the apex of the root, the more challenging it is to repair and the higher the risk of complications.
**Correct Answer:** C.