Truness of Full Arch Impressions in All on x Cases

Exclusion Criteria

• •Uncontrolled systemic diseases (e.g., uncontrolled diabetes, osteoporosis, immunosuppressive disorders)
• •History of radiation therapy to the head and neck region
• •Active periodontal disease or untreated caries
• •Maxillary cysts, tumors, or pathologies
• •Poor oral hygiene or inability to maintain postoperative care
• •Insufficient bone volume for All-on-X without extensive grafting
• •Maxillary sinus pathology or oroantral fistula
• •Psychiatric illness or cognitive impairment affecting compliance
• •Bruxism or parafunctional habits
• •Pregnant or lactating women
• •History of implant failure or titanium allergy
• •Use of bisphosphonates or antiresorptive medications
• •Heavy smoking (\>10 cigarettes/day)
• •Inability or unwillingness to attend follow-up visits
• •Diagnosed or symptomatic temporomandibular joint disorders (pain, clicking, locking, limited opening)