This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Dental
[{'content': 'Which of the following pontic appears as it is arising from the ridge like a natural tooth and it is said to have evolved from root extended or root tipped pontics: \nSelect and explain. \nA. Spheroidal pontic., B. Bullet shaped pontic., C. Ovate pontic., D. Ridge lap pontic.', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Ovate pontics \nThese pontics are used\xa0in cases, where the residual\xa0ridge is defective or incompletely healed.They can also used in broad and flat ridges. The pontic is designed such that its cervical end extends into the defect of the edentulous ridge. The pontics should be reduced as healing progresses, as it appears to arise from the ridge like a natural tooth. It is said to have evolved from root extended or root tipped pontics.', 'role': 'assistant'}]