Table 1 Search codes according to PICO

Population

#1 (single implant) OR (multiple/multi-unit implants)OR

(partially edentulous arch/jaw) OR (complete arch/jaw) OR (full arch/jaw) OR (oral implant) OR (dental implant) OR (implant prosthesis/restorations/rehabilitation)

Intervention

#2 (digital impression) OR (intraoral scan) OR (optical impression) OR (inraoral digitizer) OR (dental scanner) OR (dental impression) OR (digital scan) OR (digital dentistry)

Comparison

#3 (conventional impression) OR (traditional impression) OR (conventional technique)

Outcome

#4 (impression accuracy) OR (trueness) OR (precision) OR (in vivo study) OR (dimensional measurement accuracy)

Search

(#1) AND (2#) AND (3#) AND (4#)