Rangirkhari and Ambicapatty run into each other along Hailakandi Road, and the clinic sits on the seam. That is a small piece of trivia with a practical consequence: whichever of the two names you searched, you have found the right place, and the walk from Rangirkhari Point is short enough to do in the time it takes to find parking.
What that proximity is actually worth is multi-visit treatment. A root canal and its crown, an implant and the months of healing between placement and the tooth on top, a course of aligners with a review every few weeks — none of these are one-appointment jobs, and all of them are far easier to finish properly when the clinic is a few minutes from where you already are.
It also means a second opinion costs you nothing but the walk. If you have been told a tooth needs extracting and would rather hear it twice, that is a reasonable thing to ask for and a short trip to get.