What is shorten dental arch concept?
Shorten dental arch:

Healthy & stable dental arch/dentition in which posterior molar teeth are missing.
With stability and limited but sufficient masticatory ability, posterior missing teeth are not replaced.
It always shows compromise v/s benefit ratio by replacing/not replacing the missing teeth.
Patient perception of functional compromise as well as benefit by not replacing missing molars.
Distal & labial migration of most posterior teeth by not replacing missing molars.
Supraeruption of opposite arch teeth by not replacing missing molars
None of the above