Which impression is typically taken first during dental procedures, and why?

The mandibular impression is taken first during dental procedures primarily to reduce the likelihood of triggering the gag reflex. Many patients experience a strong gag reflex, particularly when impressions are made for the upper arch, as the maxillary area is closer to the soft palate and the gag reflex can be activated more easily there. By starting with the mandibular impression, the dental assistant can familiarize the patient with the impression material and process in a less sensitive area of the mouth, helping to make the overall experience more comfortable. This method also allows for the patient to adjust to the impression materials before moving to a potentially more challenging area where gagging might occur. Additionally, taking the mandibular impression first can help build patient confidence and reduce anxiety about the procedure.