Dental matching is being performed when you click Initiate Match 
in the Dental page Match group of the Reconciliation ribbon page.
"Dental matching" is a batch process which is started on the SQL server.
The process compares all dental data in AM and PM or PUI files.
When the matching is finished, the window "Dental Match Result" can be opened .
Under by clicking 
Under "Property Score", the files which have the highest number provide the best chance of identification.
The icons in top of the window allow various visual comparisons of the selected file(s) to be made.