Final answer:
The appropriate mouthrinse to recommend is a mouthrinse containing essential oils. They have antiseptic and antibacterial properties, prevent gingivitis, and do not cause tooth surface discoloration.
Step-by-step explanation:
An appropriate mouthrinse for the client to recommend would be a mouthrinse containing essential oils. Essential oils, such as thymol and eucalyptol, have been found to have antiseptic and antibacterial properties, which can help prevent gingivitis and reduce tartar and bad breath. They act by denaturing proteins and disrupting membranes of the bacteria. Unlike chlorhexidine gluconate mouthrinse, mouthrinses containing essential oils do not cause tooth surface discoloration, making them a better option.