Does every power point in a treatment room need its own circuit?

No. The rule is one room per circuit, not one outlet per circuit. The final sub-circuit that feeds a body-protected area serves that room and its ensuite only, so a fault in one surgery never trips the room next door, and the room’s outlets share that circuit behind the 10 mA RCDs. One RCD protects up to 12 points.

What does get its own circuit is the big equipment: the dental chair, imaging equipment such as OPG, CBCT and X-ray, sterilisers and compressors. That is about load, start-up current and nuisance tripping, and about the supplier’s specification, not a rule that each socket be wired separately. The cleaners’ outlet is on its own circuit too, from the switchboard with its own 10 mA RCD.

If a quote shows a separate circuit for every outlet, ask why. It is not what the standard asks for, and it is a lot of cable and switchboard space.