Taste and smell are closely linked – you can even use flavor to your advantage in your dental practice! You can offer a wide range of drinks from water, fresh juice, or something stimulating such as tea or coffee. All of these, in their own way, help the more anxious patient focus on something else besides their fears.
Within the realm of dentistry itself, you can switch to using materials that, at worst, are taste-neutral. Instead, use dental materials that are pleasantly flavored, including mouthwashes and topical anesthetics.