What is the direct answer?
A black G3 toothbrush head fits only when its connector and product family match the handle.
What does this question mean?
The G3 style uses flexible bristles and a gumline-following shape; colour changes appearance, not the cleaning mechanism.
What can you do next?
Match the exact handle model and connector, inspect the locking fit, and replace a head when bristles splay or it is damaged.
When should you seek dental care?
Ask for a different head design if brushing causes recession, abrasion, bleeding, or persistent tenderness.
What should you ask the dentist?
Ask whether the head fits your handle, whether its firmness suits your gums, and how to angle it along the gumline.
Frequently asked questions
Will a G3 head fit every Sonicare handle?
Do not assume universal fit; compare the handle model and connector with the package compatibility information.
How should I use a flexible gum-care head?
Use light pressure and guide it slowly along the gumline rather than scrubbing side to side.

