Final answer:
Answer C is correct for apexogenesis, which relies on maintaining vital tissue within the root canal to allow for continued root development and eventual closure. Apexogenesis helps in preserving the vitality of the tooth for it to mature fully, which is crucial for young teeth with incompletely formed roots.
Step-by-step explanation:
The correct answer to the given question is C:
Apexogenesis for an incompletely formed root of a nonvital tooth is based on the theory that maintenance of vital tissue within the root canal of an incompletely developed tooth will permit eventual root-end closure.
Apexogenesis is a restorative procedure in dentistry where the aim is to encourage a pulpally involved tooth to continue to develop, which helps in root maturation and eventual closure. This process involves maintaining the vitality of the affected tooth, which is essential in allowing the root to continue its formation. The outer layer of the tooth consists of enamel, which is the hardest tissue in the body but still susceptible to decay. Under the enamel is dentin, and in the center lies the pulp cavity containing the vascular and nerve tissues. If decay progresses to reach the pulp, it can compromise the vitality of the tooth, and in young teeth, it can prevent the complete formation of the tooth roots.
Microbes are responsible for tooth decay by feeding on sugars in the mouth, subsequently releasing acids that erode the enamel and cause cavities. The most important cariogenic species of bacteria is Streptococcus mutans. It's essential to treat decay early to prevent extensive damage that may necessitate a root canal or more invasive procedures, and when it comes to incomplete root formation, apexogenesis is often considered as a treatment to save the tooth and assist in proper root development.