Acrylic tray stop?

[albatross321]

Came across a board question showing an upper acrylic impression tray asking where should the tray stop be placed. Anyone has an idea as to which cusp or area?

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[twinklestar123]

it must be located posterior to the distal surface of the most posterior tooth in the arch and should not be in a position that'll interfere with the complete seating of the tray.

 

[albatross321]

it must be located posterior to the distal surface of the most posterior tooth in the arch and should not be in a position that'll interfere with the complete seating of the tray.

if given the choice of either lingual or facial cusp tips, which is the more ideal?

 

[twinklestar123]

I am inclining more towards the facial.What do you say.Not too sure thou'