[AC Question]

Hi everyone I'm new here, sry if this is in the wrong section. My camera glass cracked, I removed broken pecies but the rear panel is fine. I watched a video repairing which seems pretty straight forward but,
1. I know I can just slide in the new glass but one edge around it is slightly dented. Also, may be tiny fragments of glass down inside. Would sliding it in be fine? This is my preferred route.

2. Does the glass aide in focusing? Because my camera dosent focus since it broke.

3. If I remove the back panel will the adhesive be good enough to put it back on. Or have to buy another panel.