Participant’s characteristics
long-term illness, RPDs, tooth
RECRUITMENT
Because one of the participating surgeons had a long-term illness, 12 participants received no MI in the study period (Fig. Flowchart of the participantsThe recruitment period ranged between January 2014 and July 2015. The study ended in July 2018. The new or optimized RPDs of the 79 study jaws (31 maxillae) were either double crown-retained (Distribution of mini-implants by tooth site (FDI tooth numbering system) and screw diameter