Final answer:
The problem identified in the scenario is root caries, as it relates to Mrs. Sanchez’s concerns about her receding gums and the potential effectiveness of fluoride treatments compared to Chlorhexidine varnish (CHx-V).
Step-by-step explanation:
The Problem (P) identified in the scenario is root caries. Mrs. Sanchez is concerned about getting root surface cavities due to her receding gums and is inquiring about the effectiveness of professionally applied fluoride treatments versus Chlorhexidine varnish (CHx-V).
While fluoride varnish is commonly used and has been proven to protect teeth from decay, the student is interested in determining whether CHx-V might be a more effective alternative for preventing root caries, especially in the context of receding gums.