Final answer:
The nurse should expect tooth erosion in a client with bulimia nervosa due to frequent exposure to gastric acid from vomiting.
Step-by-step explanation:
The nurse should expect tooth erosion in a client who has bulimia nervosa. This is because individuals with bulimia nervosa engage in frequent episodes of binge eating followed by purging, which involves vomiting. The exposure to gastric acid from vomiting can cause dental caries (cavities) and tooth erosion.