Spacers vital in a whitening tray?

[dentwannabe]

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So are spacers absolutely VITAL in fabricating a whitening tray? Or is simply vacuum forming off a stone model appropriate?

 

[Streetwolf]

We learned to just vacuum form off a stone model and it's worked for me so far.

 

[Kabek]

So are spacers absolutely VITAL in fabricating a whitening tray? Or is simply vacuum forming off a stone model appropriate?

The spacing is there to retain the gel.

 

[UKdent]

both are acceptable. we learned to put a .5mm space in to help protect the gingiva, though both will work.. however you might check with the manufacturers recommendation... some request a relief space

but to answer you question about being VITAL..no