Both are common denture services, and both are quicker and less expensive than a new denture - but they fix different things.
A reline: fixing the fit
A reline reshapes the fitting surface of your denture to match your current gum line. It's the right fix when your denture has become loose or uncomfortable because your gums have changed shape over time - the denture itself isn't damaged, it just no longer matches your mouth as closely as it did. SA Precision Dentures offers overnight relines, typically $350–$600.
A repair: fixing physical damage
A repair fixes actual damage - a crack, a chip, a broken tooth, or a denture that's snapped after being dropped. It doesn't change how the denture fits your gums; it restores the denture to its original working condition. SA Precision Dentures aims to provide a same-day repair whenever possible, typically $150–$300.
A simple way to tell them apart
If your denture looks physically fine but feels loose or uncomfortable, that's a reline. If your denture is visibly damaged - cracked, chipped, or broken - that's a repair. Occasionally both are needed at once, particularly after an accident that's both damaged the denture and changed how it sits.
One important warning
Never attempt a DIY repair with superglue or a household adhesive. This can permanently damage the denture material and make a professional repair much harder, or impossible.