Final answer:
To correct cheek-biting after placing a new complete denture, the dentist should reduce the buccal (cheek) cusps of the maxillary (upper) molars.
Step-by-step explanation:
The issue of cheek-biting opposite the molars in a patient with a new complete denture may arise due to improper occlusion, specifically the relationship between the upper (maxillary) and lower (mandibular) teeth. In a conventional anatomic relationship, the teeth are set to mimic natural tooth anatomy, including the cusps. Cheek-biting can occur if the buccal cusps of the upper molars are too prominent or extend too far buccally (toward the cheek).
To address this problem, the dentist needs to adjust the occlusion by selectively reducing the buccal cusps of the maxillary molars. This process involves carefully reshaping the cusps to achieve a more balanced and harmonious occlusal relationship. By reducing the excessive height or extension of the buccal cusps, the risk of cheek-biting is minimized, and the patient's comfort is improved.
Proper occlusion is crucial for the stability and functionality of dentures, and adjustments may be necessary to achieve an optimal fit. Dentists use their clinical judgment and skills to identify and address issues like cheek-biting, ensuring that patients can wear their dentures comfortably and functionally.