Oral and maxillofacial surgery involves the diagnosis and surgical treatment of diseases, injuries, and defects in the oral and maxillofacial region. Some common procedures include extractions of impacted or decayed teeth, biopsy of cysts and tumors, reconstruction after trauma or cancer surgery, and treatment of conditions like cleft lip or palate. Proper training is required in areas like patient assessment, use of specialized instruments, surgical asepsis, and postoperative care. Procedures require careful preparation, including sterilizing equipment, taking vital signs, reviewing medical history, and providing instructions to patients.