[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"health-studies-list:{\"conditionNormalized\":\"dental-restorations-longevity\",\"overallStatus\":[\"RECRUITING\",\"AVAILABLE\",\"NOT_YET_RECRUITING\"],\"orderBy\":\"LastUpdateSubmitDate:desc\",\"size\":25,\"offset\":0}":3,"health-study-condition:dental-restorations-longevity":26},{"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":4,"enrollmentInfo":18,"targetDuration":4,"studyType":21,"phases":22,"briefSummary":24,"conditions":25,"keywords":27,"overallStatus":34,"whyStopped":4,"lastUpdateSubmitDate":35,"lastUpdatePostDateStruct":36,"startDateStruct":39,"completionDateStruct":41,"leadSponsor":43,"locationsCount":4},"100655178","3d-printed-versus-cadcam-milled-resin-restorations-in-posterior-teeth-100655178",false,"NCT07811167","3D-Printed Versus CAD\u002FCAM-Milled Resin Restorations in Posterior Teeth.","Clinical Performance of 3D-Printed Versus CAD\u002FCAM-Milled Resin Restorations: A Randomized Controlled Clinical Trial","Inclusion Criteria:\n\n* • Adult patients (≥18 years) attending the University Dental Clinic (Universitat de València) in need of a posterior indirect partial restoration (onlay\u002Foverlay)\n\n  * Permanent posterior tooth (premolar or molar) presenting extensive coronal destruction (caries, fracture, or failed previous restoration) requiring indirect restoration, with at least one weakened or missing cusp\n  * Sufficient remaining tooth structure to allow adequate adhesive isolation (rubber dam) and adhesive cementation\n  * Tooth classified as either vital (Stratum 1) or endodontically treated with an adequate, asymptomatic root canal filling and no radiographic signs of periapical pathology (Stratum 2)\n  * Natural antagonist dentition\n  * Favorable occlusal relationship\n  * Healthy periodontal status or adequately controlled periodontal disease (probing depth ≤ 3 mm, no active clinical attachment loss)\n  * Willingness and ability to attend all scheduled follow-up visits over the 24-month study period\n  * Signed informed consent\n\nExclusion Criteria:\n\n* • Known allergy or hypersensitivity to methacrylate-based materials, Bis-EMA, or any component of the restorative materials used (per manufacturer contraindications for saremco print CrownTec® and Brilliant Crios)\n\n  * Parafunctional habits (bruxism, clenching, or foreign object chewing) without adequate occlusal protection\n  * Active or untreated periodontal disease\n  * Poor oral hygiene or inability to maintain adequate plaque control\n  * Temporomandibular joint disorders\n  * Tooth requiring full-coverage restoration (crown) rather than a partial indirect restoration\n  * Endodontically treated tooth with inadequate root canal filling, periapical pathology, or insufficient remaining coronal structure to support the restoration without additional foundation (e.g., post\u002Fcore) beyond the study protocol\n  * Pregnant or breastfeeding patients\n  * Uncontrolled systemic disease that could compromise treatment outcome or follow-up compliance\n  * Active substance abuse\n  * Participation in another interventional clinical trial that could interfere with study outcomes\n  * Inability to provide informed consent","ALL","18 Years",{"count":19,"type":20},70,"ESTIMATED","INTERVENTIONAL",[23],"NA","Indirect resin restorations had become a well-established conservative alternative to direct composite restorations in posterior teeth, particularly in cases of significant loss of tooth structure requiring cuspal coverage (onlays\u002Foverlays). Compared with direct restorations, indirect techniques reduced the impact of polymerization shrinkage and shrinkage stress, generally achieving a higher degree of monomer conversion and greater resistance to marginal microleakage and wear, although at the cost of more extensive tooth preparation.\n\nWith the advancement of digital dentistry, indirect resin restorations could be fabricated using either subtractive manufacturing (CAD\u002FCAM milling of prefabricated resin blocks) or, more recently, additive manufacturing (3D printing). Improvements in ceramic-filled resin formulations and in printing and post-processing protocols had expanded 3D printing from provisional to definitive restorations. Among printable materials, Crowntec (Saremco Dental AG) had demonstrated the most favorable mechanical properties reported in the literature, exceeding the minimum flexural strength threshold established by ISO 6872:2024 for monolithic single-unit restorations, although generally remaining below the values achieved by milled CAD\u002FCAM resin blocks.\n\nDespite the increasing clinical use of 3D-printed resins, evidence on their long-term clinical performance remained scarce, particularly in comparison with CAD\u002FCAM-milled restorations. Existing data were derived mainly from in vitro studies with heterogeneous methodologies, limiting their extrapolation to real clinical conditions, where biological aging, occlusal loading, and patient-specific factors play a determining role.\n\nAim of the Study\n\nThe study aimed to evaluate and compare the following:\n\n* The clinical performance of posterior indirect resin restorations fabricated by 3D printing (Crowntec, Saremco Dental AG) versus CAD\u002FCAM milling (Brilliant Crios, Coltene), over a follow-up period of 36 months.\n* The volumetric wear of the restoration and of the antagonist tooth according to the manufacturing technique.\n* The effect of pulp status (vital vs. endodontically treated tooth) on the success and survival of the restorations.\n\nStudy Summary A prospective, randomized, parallel-group, double-blind (participant and outcomes assessor) clinical trial is being conducted at the Clínica Odontológica of the Universitat de València (Fundación Lluís Alcanyís). Each patient provides informed consent prior to participation, and ethical approval has been obtained from the Comité Ético de Investigación en Humanos of the Universitat de València.\n\nAdult patients (≥18 years, ASA I or II) requiring a posterior indirect restoration with cuspal coverage, in either vital or endodontically treated teeth, are eligible for inclusion. Restorations are randomly assigned, in permuted blocks stratified by pulp status, to be fabricated by additive manufacturing (3D-printed resin) or subtractive manufacturing (CAD\u002FCAM-milled resin).\n\nStandardized tooth preparations are performed under local anesthesia using cuspal-coverage preparation principles, including immediate dentin sealing for vital teeth. Intraoral digital impressions are taken, and provisional restorations are placed. Final restorations are fabricated using either 3D printing or CAD\u002FCAM milling techniques, depending on group assignment, and are cemented using resin cement following manufacturer instructions under rubber dam isolation.\n\nClinical evaluation is performed by a blinded outcomes assessor at baseline (1 week) and at 3, 6, 12, 18, 24, 30, and 36 months, using the revised FDI World Dental Federation criteria (Hickel et al., 2023), assessing functional, esthetic, and biological properties. Volumetric wear of the restoration and of the antagonist tooth is quantified by superimposition of successive intraoral digital scans, and restoration color change is assessed by standardized calibrated photography. An independent, blinded statistician performs the statistical analysis.",[26],"Dental Restorations Longevity",[28,29,30,31,32,33],"Subtractive manufacturing","Additive manufacturing","Overlay","Posterior indirect restorations","Restoration survival","Randomized controlled trial","NOT_YET_RECRUITING","2026-09-02",{"date":37,"type":38},"2026-09-09","ACTUAL",{"date":40,"type":20},"2026-10-01",{"date":42,"type":20},"2028-12-31",{"name":44,"class":45},"University of Valencia","OTHER"]