Matt Welebir, DDS

Invisalign has to be evaluated on a case-by-case basis.  It is an awesome treatment option in a majority of cases but there are some instances where traditional braces are a better option.

Over 50% of my current Invisalign cases reflect your exact concerns:  Age 30-55, history of not wearing retainers and lower crowding.  In most cases, Invisalign is a slam dunk and can correct this predictably. 

Orthodontists sometimes charge more for Invisalign because the lab costs are fairly astronomical when compared to conventional braces.  At age 35, no one wants metal brackets anymore, and Invisalign is likely to be a great option for you.

Hope that helps.