RPD Review Questions
Correct. Although certainly not a "first choice" retainer, half and half clasps are used to engage lingual undercuts and can be used on both extension and tooth-supported RPDs.
Incorrect. Lingual I-bars are only used on lower molars.
Incorrect. Lingual modified T-bars are seldom if ever used on any tooth.
Incorrect. A ring clasp utilizes a lingual undercut but is only used on molars.