Question

The inferior border of the lingual bar of a removable

partial denture should
A. displace the lingual frenum.
B. be in contact with the cingula of the incisor
teeth.
C. be superior to the gingival border.
D. be as inferior as the movement of the frenum of
the tongue will permit.

Answer 1

The inferior border of the lingual bar of a removable partial denture should be positioned as low as the movement of the tongue's frenum allows. It should not displace the lingual frenum, contact the cingula of the incisor teeth, or extend above the gingival border.

Step-by-step explanation:

The question pertains to the proper positioning of the inferior border of the lingual bar of a removable partial denture (RPD). Proper design and placement of the lingual bar are crucial for ensuring that the denture is secure, comfortable, and does not interfere with the normal functions of the mouth.

The correct answer is that the inferior border of the lingual bar of a removable partial denture should be as inferior as the movement of the frenum of the tongue will permit. This design consideration ensures that the bar does not impede tongue movement or displace the lingual frenum, which could cause discomfort or impact speech and eating. It is also to be made sure that the bar does not contact the cingula of the incisor teeth or extend above the gingival border, which could cause irritation or damage to the periodontal tissues.