A 52-year-old lady complains of food impaction underneath #29 retainer (Fig.1).  The retainer is most likely separated/fractured from its abutment (<).  A section is to be made between #28 and 29 retainers (red line). 

From Bridge to Implants

Xin Wei, DDS, PhD, MS 1st edition 03/15/2015, last revision 03/15/2015