Are you still seeing a 7-pack? From what I've seen, the latest Pigeon update has removed almost all local 7-packs for a more compact, 3-pack or the new "local stack" (or whatever we're calling it). When I Google "toronto dentist," I'm getting a more compact 3-pack, granted I am in the States.
To answer your original question, I'd probably say no just because it's probably not the best way to focus your local SEO efforts. In most cases the local packs are at the top of SERPs (underneath ads, of course) but very rarely are they half-way down the SERP. I have some clients targeting keywords with SERPs that trigger the local pack between organic listings 1 and 2, but that's becoming rare.
Your goal should be to rank in the local pack (or higher in it, if you're already there). What I can say is the way to possibly jumping the local pack and the way to move up in the pack are likely the same tactics: basic local SEO. There are a ton of blog posts out there from awesome experts like Andrew Shotland and Mike Blumenthal, but some important initial questions to ask yourself and audit your website with:
- Basic SEO principles: duplicate content (all forms), good title tags, img tags, etc.
- Local SEO principles: business city/state in title tags, NAP on (basically) every page, local phone number used (not 1-800), etc.
- Technical principles: all the basics, 404s, bad 301s/302s, XML sitemap, using schema for local business (or more specific schema [there's now a dentist one, I believe], etc.)
If you're a multiple location business there's a whole lot more to the Local SEO principles, but I'd recommend checking out some of the experts' and their blogs for those. Some of those recommendations and answers can be too long for a Moz Q&A.
