The cells of the dental pulp which are responsible for the deposition of reparative dentin are:
**Core Concept**
The dental pulp is a unique tissue within the tooth that contains various cell types, including odontoblasts, fibroblasts, and stem cells. The odontoblasts are responsible for the formation of dentin, while the fibroblasts play a role in the production of the dentin matrix. However, under certain conditions, other cells within the pulp can contribute to the formation of reparative dentin.
**Why the Correct Answer is Right**
Reparative dentin is formed in response to injury or inflammation within the pulp, and it is characterized by the deposition of dentin-like tissue by non-odontoblastic cells. This process is mediated by the pulp stem cells, which can differentiate into odontoblast-like cells and produce dentin matrix. The pulp stem cells are thought to be responsible for the deposition of reparative dentin, as they can respond to injury and contribute to the repair of the dentin-pulp complex.
**Why Each Wrong Option is Incorrect**
* **Option A:** This option is incorrect because odontoblasts are the primary cells responsible for the formation of dentin, not reparative dentin.
* **Option B:** This option is incorrect because fibroblasts play a role in the production of the dentin matrix, but they are not the primary cells responsible for the deposition of reparative dentin.
* **Option D:** This option is incorrect because cementoblasts are the cells responsible for the formation of cementum, a bone-like tissue that covers the root of the tooth.
**Clinical Pearl / High-Yield Fact**
Reparative dentin is an important concept in endodontics, as it can contribute to the repair of the dentin-pulp complex after injury or inflammation. Understanding the role of pulp stem cells in the formation of reparative dentin is crucial for the development of new treatment strategies for pulp injuries.
**Correct Answer: C. Pulp stem cells.