4 Implants in the Mandibular Anterior Area?

Dr. Ruddick asks:

I have been using two dental implants to restore mandibular overdentures. I have my surgeon place a regular platform dental implant in the #22 and 27 areas and then I retrofit the existing mandibular complete denture.

I was recently at a dental implant course where several dentists were
describing how they used 4- dental implants in the mandibular anterior area
with Locator attachments instead of just two as I have been doing. Is
there a significant advantage to using 4 as opposed to 2 dental implants in
this situation? Thanks for any comments.