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
Which among the following is least hygienic pontic: 
Select and explain. 
A. Saddle pontic., B. Modified ridge lap pontic., C. Spheroidal pontic., D. Fish-belly pontic.
A: Saddle pontic.
Answer: A: Saddle pontic. 
Explanation: Saddle pontic 
• The concave gingival surface overlaps the ridge buccally and lingually.
• The gingival surface will not have continuous contact with the ridge instead only the buccal and lingual ends of gingival surface will contact the tissue.
• It is the least hygienic pontic