Tongue and Occlusal Pressure Performance and Dietary Habits in Maxillectomy Patients With Obturator Prostheses

Inclusion Criteria: * Primary treatment must include maxillectomy, with or without adjuvant chemotherapy or radiotherapy. * Age range: 18 to 85 years old (all genders). * Eastern Cooperative Oncology Group (ECOG) Performance Status of 0 or 1. * Ability to provide written informed consent. Exclusion Criteria: * Inability to understand the investigator's instructions (or indications). * Inability to hold the tongue pressure probe and occlusal pressure Prescale film in the proper position. * Inability to apply pressure to the tongue pressure probe and occlusal pressure Prescale film. * Dysphagia (difficulty swallowing) resulting from prior head and neck cancer treatment. * Severe dysphagia caused by a central nervous system disorder. * Presence of temporomandibular joint (TMJ) pain. * The investigator determines the patient is unsuitable for the study.