Masticatory Performance Evaluation

For prospective group: Inclusion Criteria: * Patients who have lost their second molar, are scheduled to undergo single-implant reconstruction at the Prosthodontics Department of National Taiwan University Hospital, and do not have any major physical or mental health conditions. Exclusion Criteria: * Severe temporomandibular joint disorder * Inability to comply with the treatment schedule * Inability to cooperate with masticatory function tests * Lack of opposing teeth for the implant-supported restoration * Patients whose anterior teeth will be included in the prosthetic reconstruction or whose occlusion will undergo significant changes after reconstruction For retrospective group: Inclusion Criteria: * Patients who have lost their second molar, have undergone single-implant-supported fixed restoration reconstruction at the Prosthodontics Department of National Taiwan University Hospital, and do not have any major physical or mental health conditions. Exclusion Criteria: * Implant-supported dentures that cannot be removed or have significant damage * Severe temporomandibular joint disorder * Inability to comply with the treatment schedule * Inability to cooperate with masticatory function tests * Lack of opposing teeth for the implant-supported denture