[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"health-studies-list:{\"conditionNormalized\":\"atrophy-of-the-posterior-maxilla\",\"overallStatus\":[\"RECRUITING\",\"AVAILABLE\",\"NOT_YET_RECRUITING\"],\"orderBy\":\"LastUpdateSubmitDate:desc\",\"size\":25,\"offset\":0}":3,"health-study-condition:atrophy-of-the-posterior-maxilla":27},{"pageToken":4,"total":5,"offset":6,"count":5,"results":7},null,1,0,[8],{"id":9,"slug":10,"hasResults":11,"nctId":12,"briefTitle":13,"officialTitle":14,"acronym":4,"eligibilityCriteria":15,"healthyVolunteers":11,"sex":16,"minAge":17,"maxAge":18,"enrollmentInfo":19,"targetDuration":4,"studyType":22,"phases":23,"briefSummary":25,"conditions":26,"keywords":28,"overallStatus":32,"whyStopped":4,"lastUpdateSubmitDate":33,"lastUpdatePostDateStruct":34,"startDateStruct":37,"completionDateStruct":39,"leadSponsor":41,"locationsCount":5},"100594237","guided-pterygoid-implant-100594237",false,"NCT07016828","Guided Pterygoid Implant","Comparing Accuracy of Pterygoid Implants Placement Using Computer-guided Surgical Templates Versus Free Hand Technique","Inclusion Criteria:\n\n1. Patients with severe posterior maxillary atrophy (Class V-VI Cawood \\& Howell classification) requiring pterygoid implant placement.\n2. Patients with severe alveolar bone atrophy in posterior maxilla (Residual alveolar bone height \\\u003C4mm in posterior maxilla precluding conventional implant placement).\n3. Adequate interarch space ≥7mm for prosthetic rehabilitation.\n4. Presence of pneumatized maxillary sinus with insufficient bone for sinus augmentation.\n5. Patients aged 21-75 years with completed craniofacial growth.\n\nExclusion Criteria:\n\n1. Patients with systemic conditions contra-indicating general anesthesia.\n2. Patients with conditions contraindicating implant placement (e.g.:\n\n   radiation to the head and neck, intra-venous bisphosphonates, uncontrolled Diabetes mellitus).\n3. Patients with acute maxillary sinus infection or maxillary sinus cyst.\n4. Restricted mouth opening (less than 3cm inter-arch distance anteriorly).","ALL","21 Years","75 Years",{"count":20,"type":21},12,"ESTIMATED","INTERVENTIONAL",[24],"NA","Introduction \\& Background Alveolar ridge resorption after tooth extraction leads to significant bone loss, complicating prosthetic rehabilitation. Traditional bone grafting methods, though effective, involve long healing times and risks. Pterygoid implants offer a graft-free alternative by engaging dense bone structures like the pterygoid process. However, their placement is technically challenging due to limited visibility and proximity to critical structures. Computer-guided surgery may improve accuracy and reduce complications compared to freehand techniques.\n\nResearch Question Does computer-guided surgery enhance the accuracy of pterygoid implant placement in atrophic maxillae compared to freehand techniques? Aim To compare the accuracy of computer-generated 3D surgical guides versus freehand placement of pterygoid implants.\n\nHypothesis\n\n* H0: No difference in accuracy between techniques.\n* Hₐ: there is difference between two techniques Study Design A prospective randomized controlled trial (1:1 allocation) with 12 implants (6 per group(.\n\nPatient Selection Inclusion Criteria: Severe posterior maxillary atrophy (Cawood \\& Howell V-VI), residual bone height \\\u003C4mm, age 21-75.\n\nExclusion Criteria: Contraindications for surgery, uncontrolled systemic diseases, or acute sinus infections.\n\nMethods\n\n* Group A: Implants placed using CBCT-based 3D surgical guides.\n* Group B: Freehand placement based on anatomical landmarks.\n* Primary Outcome: Implant position accuracy (postoperative CBCT vs. virtual plan(.\n* Secondary Outcomes: Surgical time, complications, and stability. Surgical Procedure\n* Osteotomy: Angled drilling (45-60°) into the pterygoid process.\n* Implant Placement: Torque ≥30 Ncm for primary stability.\n* Postoperative Care: Antibiotics, analgesics, and follow-up CBCT at one week. Statistical Analysis Data analyzed using SPSS, with G\\*Power determining sample size (85% power, α = 0.05(.\n\nEthical Considerations Approved by institutional review boards, with informed consent and confidentiality maintained.",[27],"Atrophy of the Posterior Maxilla",[29,30,31],"guided surgery","pterygoid implant","atrophic maxilla","NOT_YET_RECRUITING","2025-06-11",{"date":35,"type":36},"2025-06-12","ACTUAL",{"date":38,"type":21},"2025-07-30",{"date":40,"type":21},"2026-06-30",{"name":42,"class":43},"Fayoum University","OTHER"]