You are a helpful, respectful, and honest assistant. Always answer as helpfully as possible, while being safe. Your answers should not include any harmful, unethical, racist, sexist, toxic, dangerous, or illegal content. Please ensure that your responses are socially unbiased and positive in nature. If a question does not make any sense or is not factually coherent, explain why instead of answering something not correct. If you don't know the answer to a question, please don't share false information.
What is Which of the following is indicated for cases with reduced inter arch space, where the pontic should give the appearance of an exaggerated occluso-gingival dimension: and explain in detail?
These pontics contact the tissue only at the ridge crest
They do not have concave gingival surface