Final answer:
A hard reline in dentistry is a maintenance procedure performed typically months after denture insertion to improve the fit and comfort of the denture by adding a new base material to its fitting surface. This addresses changes in the mouth's anatomy over time and is generally recommended every one to two years.
Step-by-step explanation:
The term 'hard reline' refers to a procedure in dentistry where the fitting surface of a denture is replaced with new base material, significantly improving its stability and fit. This process is typically done several months after the initial insertion of the denture, often indicated as 'X mos after insertion,' where 'X' stands for the number of months recommended by the dentist.
Over time, due to bone resorption and changes in the oral tissues, dentures can become loose and uncomfortable, resulting in the need for a reline. A hard reline involves the dentist or a dental technician adding a layer of denture base material to the denture's fitting surface, which is then shaped to conform closely to the contours of the patient's gums. This can be done directly in the mouth or indirectly in a dental lab. The material used is typically a type of acrylic that hardens to provide a durable surface that fits the edentulous (toothless) ridge comfortably.
Patients typically need to schedule a denture reline every one to two years to maintain the best fit, but the exact timing can vary based on individual circumstances. It is a standard maintenance procedure to ensure the continued comfort, function, and health of denture wearers.