[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"health-study-detail:100643976":3},{"organization":4,"armGroups":7,"interventions":20,"overallOfficials":25,"centralContacts":25,"locations":25,"responsibleParty":28,"collaborators":25,"id":32,"slug":33,"hasResults":34,"nctId":35,"briefTitle":36,"officialTitle":37,"acronym":25,"eligibilityCriteria":38,"healthyVolunteers":34,"sex":39,"minAge":40,"maxAge":41,"enrollmentInfo":42,"targetDuration":25,"studyType":45,"phases":46,"briefSummary":48,"conditions":49,"keywords":25,"overallStatus":51,"whyStopped":25,"lastUpdateSubmitDate":52,"lastUpdatePostDateStruct":53,"startDateStruct":56,"completionDateStruct":58,"leadSponsor":60,"locationsCount":25},{"fullName":5,"class":6},"Cairo University","OTHER",[8,14],{"label":9,"type":10,"description":11,"interventionNames":12},"Anatomical cavity design preparation","EXPERIMENTAL","Following caries excavation and removal of defective restorations, cavity preparations will be carried out according to the accepted principles of adhesive overlays. The cavity walls will be prepared with 6-12° internal axial wall divergence using blue-coded tapered round-end diamond burs (Komet, USA) and subsequently finished using extra-fine yellow-coded tapered round-end diamond burs (#368EF, Komet, USA). The thickness of potentially maintainable cusps will be assessed using a dental caliper (Diamonds Surgical Instruments, Pakistan). Weakened or undermined cusps (less than 2 mm thickness) will be reduced using the same diamond burs to create an anatomical occlusal reduction following the natural tooth morphology, with a reduction of 2 mm.",[13],"Procedure: Anatomical cavity design preparation",{"label":15,"type":16,"description":17,"interventionNames":18},"Butt joint cavity design preparation","ACTIVE_COMPARATOR","The cavity walls will be prepared with 6-12° internal axial wall divergence using blue-coded tapered round-end diamond burs (Komet, USA) and subsequently finished using extra-fine yellow-coded tapered round-end diamond burs (#368EF, Komet, USA). The thickness of potentially maintainable cusps will be assessed using a dental caliper (Diamonds Surgical Instruments, Pakistan). The occlusal reduction design, where weakened or undermined cusps will be reduced using a wheel stone (#909, Komet, USA) to create a flat butt-joint occlusal design with a uniform occlusal reduction of 2 mm. Additional reduction will be performed when necessary, and the available interocclusal clearance will be verified using a graduated periodontal probe in maximum intercuspation and eccentric movements.",[19],"Procedure: Butt joint cavity design preparation",[21,26],{"type":22,"name":9,"description":23,"armGroupLabels":24,"otherNames":25},"PROCEDURE","Cavity preparation design for adhesive restoration",[9],null,{"type":22,"name":15,"description":23,"armGroupLabels":27,"otherNames":25},[15],{"type":29,"investigatorFullName":30,"investigatorTitle":31,"investigatorAffiliation":5,"oldNameTitle":25,"oldOrganization":25},"PRINCIPAL_INVESTIGATOR","Lilly Assem Mousa Ahmed","PhD candidate","100643976","effect-of-different-cavity-designs-on-the-clinical-performance-of-3d--printed-resin-composite-partial-coverage-restorations-in-vital-molars-100643976",false,"NCT07667946","Effect of Different Cavity Designs on the Clinical Performance of 3D- Printed Resin Composite Partial-Coverage Restorations in Vital Molars","Effect of Different Cavity Designs on the Clinical Performance of 3D- Printed Resin Composite Partial-Coverage Restorations in Vital Molars With Complex Cavities: An 18 Month Randomized Clinical Trial","Inclusion Criteria:\n\n1. Adult patients aging 20-45 years.\n2. Healthy males and females\n3. Patients with good oral hygiene\n4. Patients presenting with at least one eligible permanent molar requiring a partial-coverage restoration.\n5. Patients willing and able to attend scheduled follow-up visits for 18 months.\n6. Permanent maxillary or mandibular molars.\n7. Vital teeth with a positive response to cold thermal testing.\n8. Complex Large or severely compromised cavities resulting from primary or secondary caries (ICDAS 5 or 6) and\u002For replacement of large defective restorations with at least 2 missing cavity walls requiring overlay restorations\n9. Well-formed and fully erupted in normal functional occlusion with natural antagonist and adjacent teeth.\n10. Absence of any radiographic, periodontal or periapical changes.\n\nExclusion Criteria:\n\n1. Participants with general\u002Fsystemic illness.\n2. Pregnant or lactating females.\n3. Concomitant participation in another research study.\n4. Inability or unwillingness to comply with study visits and procedures.\n5. Heavy bruxism or other parafunctional habits\n6. Known allergic reactions against any components of the used materials\n7. Patients receiving orthodontic treatment.\n8. Poor oral hygiene or high caries activity.\n9. Non vital teeth.\n10. Hypersensitive teeth.\n11. Teeth with prior endodontic treatment.\n12. Teeth with spontaneous pain or signs\u002Fsymptoms of irreversible pulpitis.\n13. Teeth with advanced periodontal disease or mobility.\n14. Teeth with a history of direct or indirect pulp capping procedure.\n15. Teeth with vertical root fractures or cracked tooth syndrome","ALL","20 Years","45 Years",{"count":43,"type":44},50,"ESTIMATED","INTERVENTIONAL",[47],"NA","This randomized clinical trial aims to evaluate the effect of different cavity designs on the clinical performance of 3D-printed resin composite partial-coverage restorations in vital molars with complex cavities over an 18-month follow-up period.",[50],"Clinical Performance","NOT_YET_RECRUITING","2026-06-19",{"date":54,"type":55},"2026-06-25","ACTUAL",{"date":57,"type":44},"2026-07",{"date":59,"type":44},"2028-01",{"name":5,"class":6}]