Final answer:
A surgical template for an immediate maxillary denture is primarily used to mark areas needing tissue reduction for proper denture fitting after tooth extractions.
Step-by-step explanation:
A surgical template (stent/guide) for an immediate maxillary denture is used to indicate areas that require additional hard or soft tissue reduction. This helps in ensuring that the immediate denture fits properly after teeth extractions and that necessary adjustments can be made to the surrounding tissues for optimal fit and comfort. The template is used to guide the dentist or oral surgeon during the actual surgical procedure, marking where and how much bone or soft tissue needs to be removed for the denture to sit correctly.