[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"health-studies-list:{\"conditionNormalized\":\"posterior-atrophic-maxilla\",\"overallStatus\":[\"RECRUITING\",\"AVAILABLE\",\"NOT_YET_RECRUITING\"],\"orderBy\":\"LastUpdateSubmitDate:desc\",\"size\":25,\"offset\":0}":3,"health-study-condition:posterior-atrophic-maxilla":38},{"pageToken":4,"total":5,"offset":6,"count":5,"results":7},null,1,0,[8],{"id":9,"slug":4,"hasResults":10,"nctId":11,"briefTitle":12,"officialTitle":13,"acronym":4,"eligibilityCriteria":14,"healthyVolunteers":10,"sex":15,"minAge":16,"maxAge":4,"enrollmentInfo":17,"targetDuration":4,"studyType":20,"phases":21,"briefSummary":23,"conditions":24,"keywords":4,"overallStatus":26,"whyStopped":4,"lastUpdateSubmitDate":27,"lastUpdatePostDateStruct":28,"startDateStruct":31,"completionDateStruct":33,"leadSponsor":35,"locationsCount":4},"100625027",false,"NCT07417293","Clinical and Patient Outcomes of 4 mm Ultra-Short vs. 8 mm Implants With Bone Augmentation in the Back Upper Jaw","Clinical- and Patient-related Outcomes of 4 mm Ultra-short Implants Compared to 8 Mm-long Implants With Bone Augmentation for the Rehabilitation of Posterior Atrophic Maxilla: a Randomized Controlled Clinical Trial.","inclusion criteria:\n\n* Inform consent signed.\n* Adult patients (≥18 years old).\n* No pregnant women or without the desire to stay.\n* Periodontal and peri-implant health in a pristine or reduced periodontium.\n* Full mouth plaque score \\\u003C 20% (O'Leary, 1972)\n* Maxillary multiple posterior maxillary healed sites at least 4 months after extraction (with antagonist teeth with a good prognosis (Lindhe et al. 2008)) presenting ≥ 6.5 mm of bone width and 5-6 mm in height from the bone crest to the floor of the sinus.\n* Need for a multiple splinted implant supported restoration with distal adjacent teeth or distal free-end in the posterior maxilla\n\nexclusion criteria\n\n* Patients with uncontrolled systemic diseases.\n* Smoker patients (≥10 cig\u002Fday).\n* Patients taking medications that affect bone metabolism or immunologic disorders.\n* Patients allergic to penicillin.\n* Patients presenting acute or chronic maxillary sinus lesions.\n* Advanced vertical crestal bone atrophy in the posterior maxilla (Type V and IV, Cawood-Howell Classification)\n* Vertical space of \\\u003C 6 mm for a screw-retained implant restoration.\n* Patients referring allergy to titanium or to any component of the implant\u002Frestoration.\n* No previous attempts of implant installation in the same surgical site.\n* Pregnant or lactating women.\n* Patients willing to start or in course of an orthodontic therapy.","ALL","18 Years",{"count":18,"type":19},35,"ESTIMATED","INTERVENTIONAL",[22],"NA","This study aims to compare 2 different groups of patients with both a healed site in the upper posterior sector after extractions, one treated with ultra-short implants, and another with long implants with bone regeneration. The objective is to evaluate if short-implants are superior in terms of better clinical outcomes, survival rates and safety, reduced surgical time, postoperative discomfort, and complication risk compared to conventional implants and bone regeneration.",[25],"Posterior Atrophic Maxilla","NOT_YET_RECRUITING","2026-02-10",{"date":29,"type":30},"2026-02-18","ACTUAL",{"date":32,"type":19},"2026-02-20",{"date":34,"type":19},"2029-07-01",{"name":36,"class":37},"Universitat Internacional de Catalunya","OTHER",""]