[Analysis of movement in a unilateral free-end denture due to retainer differences].

In daily practice, cases of unilateral free-end saddle involving loss of two teeth are apt to cause problems such as a loss of function and injury on the abutment teeth due to instability of the dentures. In attempting to remedy these problems, a variety of prosthesis have been used and their dynamics analyzed. Nevertheless, dynamics during function, one basis for judging the relative worth of prostheses, remain unclear.