The primary principle of treating endodontic periapical lesions is
**Core Concept**
The primary principle of treating endodontic periapical lesions involves the removal of the infected pulp tissue, disinfection of the root canal system, and restoration of the tooth to prevent further bacterial invasion. This principle is based on the understanding that periapical lesions are caused by bacterial infection and inflammation of the periapical tissues.
**Why the Correct Answer is Right**
The correct answer involves the removal of the infected pulp tissue, which is essential for eliminating the source of infection. This is achieved through endodontic therapy, which includes the cleaning and shaping of the root canal system, followed by the disinfection of the canal with antimicrobial agents. The restoration of the tooth is also crucial to prevent further bacterial invasion and to ensure the long-term success of the treatment. The removal of the infected pulp tissue reduces the bacterial load, thereby reducing inflammation and promoting healing of the periapical tissues.
**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because it does not address the primary principle of treating endodontic periapical lesions. While antibiotics may be used in conjunction with endodontic therapy, they are not the primary principle of treatment.
**Option B:** This option is incorrect because it only addresses the restoration of the tooth, without considering the removal of the infected pulp tissue and disinfection of the root canal system.
**Option C:** This option is incorrect because it only addresses the disinfection of the root canal system, without considering the removal of the infected pulp tissue and restoration of the tooth.
**Clinical Pearl / High-Yield Fact**
It is essential to note that endodontic periapical lesions can be caused by various factors, including bacterial infection, trauma, and iatrogenic errors. Therefore, a thorough diagnosis and treatment plan are necessary to ensure the successful treatment of these lesions.
**Correct Answer: C. Disinfection of the root canal system and restoration of the tooth.**