Accuracy of Intraoral Scanners in Patients With Maxillary Defects

This clinical study evaluated the trueness of two intraoral scanners in patients with acquired maxillary defects. Eight patients with unilateral maxillary defects were included. Each patient underwent direct intraoral scanning using the Medit i700 and TRIOS 3 intraoral scanners. A conventional impression was also obtained, and the resulting stone cast was digitized using a desktop scanner to serve as the reference dataset. The intraoral scan datasets were compared with the reference scan using three-dimensional analysis to assess trueness. patient-reported obturator function was also evaluated using the Obturator Functioning Scale (OFS)The study aimed to determine whether the two intraoral scanners differed in their ability to accurately record maxillary defect anatomy under clinical conditions.the study also evaluated patient-reported obturator function using the Obturator Functioning Scale (OFS)

Inclusion Criteria: * Patients aged 18 to 59 years. * Acquired maxillary defects classified as Aramany Class II. * Completely healed maxillary defects, 6 to 12 months after surgical resection. * Sound abutment teeth free from active caries and significant periodontal disease. * Adequate mouth opening. * Adequate salivary flow. * Good oral hygiene. * Ability and willingness to comply with the study procedures. Exclusion Criteria: * Patients aged 60 years or older. * History of chemotherapy or radiotherapy affecting the maxillofacial region. * Congenital cleft-related maxillary defects. * Limited mouth opening or trismus. * Severe gag reflex. * Xerostomia. * Unhealed surgical defects. * Neuromuscular disorders that may interfere with the study procedures. * Inability or unwillingness to comply with the study procedures.