Ignite Creation Date:
2025-12-26 @ 11:46 AM
Ignite Modification Date:
2025-12-26 @ 11:46 AM
Study NCT ID:
NCT05070416
Status:
TERMINATED
Last Update Posted:
2025-10-23
First Post:
2021-09-27
Is NOT Gene Therapy:
False
Has Adverse Events:
True
Brief Title:
Lithium Disilicate Crowns Study
Sponsor:
Organization:
Raw JSON
{'hasResults': True, 'derivedSection': {'miscInfoModule': {'versionHolder': '2025-12-24', 'submissionTracking': {'firstMcpInfo': {'postDateStruct': {'date': '2025-04-30', 'type': 'ACTUAL'}}}}}, 'resultsSection': {'moreInfoModule': {'pointOfContact': {'email': 'patrizia.elkuch-hoch@ivoclar.com', 'phone': '+4232353780', 'title': 'Team Leader Study Management', 'organization': 'Ivoclar Vivadent AG'}, 'certainAgreement': {'restrictionType': 'LTE60', 'piSponsorEmployee': False, 'restrictiveAgreement': True}}, 'adverseEventsModule': {'timeFrame': '4 weeks', 'eventGroups': [{'id': 'EG000', 'title': 'Crowns self-adhesively cemented', 'description': 'Group 1 receives crowns with an occlusal thickness of 1.5 mm and luted with a self-adhesive, self-curing resin cement (SpeedCem Plus, Ivoclar Vivadent AG).\n\nLithium disilicate crowns: The study population is separated in two groups. The teeth will be etched in total etch mode with 37% phosphoric acid (Total Etch, Ivoclar Vivadent AG). After the application of Adhese Universal-adhesive (Ivoclar Vivadent AG), MultiCore Flow (Ivoclar Vivadent AG) will be applied. The crowns will be polished, then etched with IPS Ceramic Etching Gel (Ivoclar Vivadent AG) and conditioned with Monobond Plus (Ivoclar Vivadent AG). The crowns will be luted as described for group 1 or 2. A final intraoral polishing step will be done with OptraGloss (Ivoclar Vivadent AG). All required light-curing steps are conducted with Bluephase G4 (Ivoclar Vivadent AG).', 'otherNumAtRisk': 3, 'deathsNumAtRisk': 3, 'otherNumAffected': 0, 'seriousNumAtRisk': 3, 'deathsNumAffected': 0, 'seriousNumAffected': 0}, {'id': 'EG001', 'title': 'Crowns adhesively luted', 'description': 'Group 2 receives crowns with an occlusal thickness of 1.2 mm delivered with a dual-curing resin cement (Variolink Esthetic (DC),Ivoclar Vivadent AG).\n\nLithium disilicate crowns: The study population is separated in two groups. The teeth will be etched in total etch mode with 37% phosphoric acid (Total Etch, Ivoclar Vivadent AG). After the application of Adhese Universal-adhesive (Ivoclar Vivadent AG), MultiCore Flow (Ivoclar Vivadent AG) will be applied. The crowns will be polished, then etched with IPS Ceramic Etching Gel (Ivoclar Vivadent AG) and conditioned with Monobond Plus (Ivoclar Vivadent AG). The crowns will be luted as described for group 1 or 2. A final intraoral polishing step will be done with OptraGloss (Ivoclar Vivadent AG). All required light-curing steps are conducted with Bluephase G4 (Ivoclar Vivadent AG).', 'otherNumAtRisk': 5, 'deathsNumAtRisk': 5, 'otherNumAffected': 0, 'seriousNumAtRisk': 5, 'deathsNumAffected': 0, 'seriousNumAffected': 0}], 'frequencyThreshold': '0'}, 'outcomeMeasuresModule': {'outcomeMeasures': [{'type': 'PRIMARY', 'title': 'Number of Crowns With Short-term Post-operative Sensitivity', 'denoms': [{'units': 'Participants', 'counts': [{'value': '3', 'groupId': 'OG000'}, {'value': '5', 'groupId': 'OG001'}]}, {'units': 'Crowns', 'counts': [{'value': '3', 'groupId': 'OG000'}, {'value': '5', 'groupId': 'OG001'}]}], 'groups': [{'id': 'OG000', 'title': 'Crowns self-adhesively cemented', 'description': 'Group 1 receives crowns with an occlusal thickness of 1.5 mm and luted with a self-adhesive, self-curing resin cement (SpeedCem Plus, Ivoclar Vivadent AG).\n\nLithium disilicate crowns: The study population is separated in two groups. The teeth will be etched in total etch mode with 37% phosphoric acid (Total Etch, Ivoclar Vivadent AG). After the application of Adhese Universal-adhesive (Ivoclar Vivadent AG), MultiCore Flow (Ivoclar Vivadent AG) will be applied. The crowns will be polished, then etched with IPS Ceramic Etching Gel (Ivoclar Vivadent AG) and conditioned with Monobond Plus (Ivoclar Vivadent AG). The crowns will be luted as described for group 1 or 2. A final intraoral polishing step will be done with OptraGloss (Ivoclar Vivadent AG). All required light-curing steps are conducted with Bluephase G4 (Ivoclar Vivadent AG).'}, {'id': 'OG001', 'title': 'Crowns adhesively luted', 'description': 'Group 2 receives crowns with an occlusal thickness of 1.2 mm delivered with a dual-curing resin cement (Variolink Esthetic (DC),Ivoclar Vivadent AG).\n\nLithium disilicate crowns: The study population is separated in two groups. The teeth will be etched in total etch mode with 37% phosphoric acid (Total Etch, Ivoclar Vivadent AG). After the application of Adhese Universal-adhesive (Ivoclar Vivadent AG), MultiCore Flow (Ivoclar Vivadent AG) will be applied. The crowns will be polished, then etched with IPS Ceramic Etching Gel (Ivoclar Vivadent AG) and conditioned with Monobond Plus (Ivoclar Vivadent AG). The crowns will be luted as described for group 1 or 2. A final intraoral polishing step will be done with OptraGloss (Ivoclar Vivadent AG). All required light-curing steps are conducted with Bluephase G4 (Ivoclar Vivadent AG).'}], 'classes': [{'categories': [{'measurements': [{'value': '0', 'groupId': 'OG000'}, {'value': '0', 'groupId': 'OG001'}]}]}], 'paramType': 'NUMBER', 'timeFrame': '4 weeks', 'description': 'assessed by patient\'s weekly feedback for 4 weeks after the treatment rating sensitivity from 1 "no sensitivity" to 4 "severe discomfort noted routinely with cold or pressure stimulation"', 'unitOfMeasure': 'Crowns', 'reportingStatus': 'POSTED', 'typeUnitsAnalyzed': 'Crowns', 'denomUnitsSelected': 'Crowns'}, {'type': 'SECONDARY', 'title': 'Quality Criteria (Modified FDI Criteria)', 'denoms': [{'units': 'Participants', 'counts': [{'value': '3', 'groupId': 'OG000'}, {'value': '5', 'groupId': 'OG001'}]}, {'units': 'Crowns', 'counts': [{'value': '3', 'groupId': 'OG000'}, {'value': '5', 'groupId': 'OG001'}]}], 'groups': [{'id': 'OG000', 'title': 'Crowns self-adhesively cemented', 'description': 'Group 1 receives crowns with an occlusal thickness of 1.5 mm and luted with a self-adhesive, self-curing resin cement (SpeedCem Plus, Ivoclar Vivadent AG).\n\nLithium disilicate crowns: The study population is separated in two groups. The teeth will be etched in total etch mode with 37% phosphoric acid (Total Etch, Ivoclar Vivadent AG). After the application of Adhese Universal-adhesive (Ivoclar Vivadent AG), MultiCore Flow (Ivoclar Vivadent AG) will be applied. The crowns will be polished, then etched with IPS Ceramic Etching Gel (Ivoclar Vivadent AG) and conditioned with Monobond Plus (Ivoclar Vivadent AG). The crowns will be luted as described for group 1 or 2. A final intraoral polishing step will be done with OptraGloss (Ivoclar Vivadent AG). All required light-curing steps are conducted with Bluephase G4 (Ivoclar Vivadent AG).'}, {'id': 'OG001', 'title': 'Crowns adhesively luted', 'description': 'Group 2 receives crowns with an occlusal thickness of 1.2 mm delivered with a dual-curing resin cement (Variolink Esthetic (DC),Ivoclar Vivadent AG).\n\nLithium disilicate crowns: The study population is separated in two groups. The teeth will be etched in total etch mode with 37% phosphoric acid (Total Etch, Ivoclar Vivadent AG). After the application of Adhese Universal-adhesive (Ivoclar Vivadent AG), MultiCore Flow (Ivoclar Vivadent AG) will be applied. The crowns will be polished, then etched with IPS Ceramic Etching Gel (Ivoclar Vivadent AG) and conditioned with Monobond Plus (Ivoclar Vivadent AG). The crowns will be luted as described for group 1 or 2. A final intraoral polishing step will be done with OptraGloss (Ivoclar Vivadent AG). All required light-curing steps are conducted with Bluephase G4 (Ivoclar Vivadent AG).'}], 'classes': [{'title': 'FDI 1 Surface Luster, FDI Score 1', 'categories': [{'measurements': [{'value': '3', 'groupId': 'OG000'}, {'value': '5', 'groupId': 'OG001'}]}]}, {'title': 'FDI 1 Surface Luster, FDI Score 2-5', 'categories': [{'measurements': [{'value': '0', 'groupId': 'OG000'}, {'value': '0', 'groupId': 'OG001'}]}]}, {'title': 'FDI 2 Surface Staining, FDI Score 1', 'categories': [{'measurements': [{'value': '3', 'groupId': 'OG000'}, {'value': '5', 'groupId': 'OG001'}]}]}, {'title': 'FDI 2 Surface Staining, FDI Score 2-5', 'categories': [{'measurements': [{'value': '0', 'groupId': 'OG000'}, {'value': '0', 'groupId': 'OG001'}]}]}, {'title': 'FDI 3 Colour, FDI Score 1', 'categories': [{'measurements': [{'value': '2', 'groupId': 'OG000'}, {'value': '5', 'groupId': 'OG001'}]}]}, {'title': 'FDI 3 Colour, FDI Score 2', 'categories': [{'measurements': [{'value': '1', 'groupId': 'OG000'}, {'value': '0', 'groupId': 'OG001'}]}]}, {'title': 'FDI 3 Colour, FDI Score 3-5', 'categories': [{'measurements': [{'value': '0', 'groupId': 'OG000'}, {'value': '0', 'groupId': 'OG001'}]}]}, {'title': 'FDI 6 Marginal Adaption, FDI Score 1', 'categories': [{'measurements': [{'value': '3', 'groupId': 'OG000'}, {'value': '5', 'groupId': 'OG001'}]}]}, {'title': 'FDI 6 Marginal Adaption, FDI Score 2-5', 'categories': [{'measurements': [{'value': '0', 'groupId': 'OG000'}, {'value': '0', 'groupId': 'OG001'}]}]}, {'title': 'FDI 8 Approximal anatomical form, FDI Score 1', 'categories': [{'measurements': [{'value': '3', 'groupId': 'OG000'}, {'value': '5', 'groupId': 'OG001'}]}]}, {'title': 'FDI 8 Approximal anatomical form, FDI Score 2-5', 'categories': [{'measurements': [{'value': '0', 'groupId': 'OG000'}, {'value': '0', 'groupId': 'OG001'}]}]}, {'title': 'FDI 10 Patient view, FDI Score 1', 'categories': [{'measurements': [{'value': '3', 'groupId': 'OG000'}, {'value': '5', 'groupId': 'OG001'}]}]}, {'title': 'FDI 10 Patient view, FDI Score 2-5', 'categories': [{'measurements': [{'value': '0', 'groupId': 'OG000'}, {'value': '0', 'groupId': 'OG001'}]}]}], 'paramType': 'NUMBER', 'timeFrame': '4 weeks', 'description': 'assessed following the FDI criteria on a scale from 1 "very good" to 5 "unacceptable" (e.g. surface lustre, Staining, and colour match of restorations)', 'unitOfMeasure': 'Crowns', 'reportingStatus': 'POSTED', 'typeUnitsAnalyzed': 'Crowns', 'denomUnitsSelected': 'Crowns', 'populationDescription': 'The clinical trial was early terminated and therefore, only the quality criteria of some participants could be assessed in detail.'}]}, 'participantFlowModule': {'groups': [{'id': 'FG000', 'title': 'Crowns self-adhesively cemented', 'description': 'Group 1 receives crowns with an occlusal thickness of 1.5 mm and luted with a self-adhesive, self-curing resin cement (SpeedCem Plus, Ivoclar Vivadent AG).\n\nLithium disilicate crowns: The study population is separated in two groups. The teeth will be etched in total etch mode with 37% phosphoric acid (Total Etch, Ivoclar Vivadent AG). After the application of Adhese Universal-adhesive (Ivoclar Vivadent AG), MultiCore Flow (Ivoclar Vivadent AG) will be applied. The crowns will be polished, then etched with IPS Ceramic Etching Gel (Ivoclar Vivadent AG) and conditioned with Monobond Plus (Ivoclar Vivadent AG). The crowns will be luted as described for group 1 or 2. A final intraoral polishing step will be done with OptraGloss (Ivoclar Vivadent AG). All required light-curing steps are conducted with Bluephase G4 (Ivoclar Vivadent AG).'}, {'id': 'FG001', 'title': 'Crowns adhesively luted', 'description': 'Group 2 receives crowns with an occlusal thickness of 1.2 mm delivered with a dual-curing resin cement (Variolink Esthetic (DC),Ivoclar Vivadent AG).\n\nLithium disilicate crowns: The study population is separated in two groups. The teeth will be etched in total etch mode with 37% phosphoric acid (Total Etch, Ivoclar Vivadent AG). After the application of Adhese Universal-adhesive (Ivoclar Vivadent AG), MultiCore Flow (Ivoclar Vivadent AG) will be applied. The crowns will be polished, then etched with IPS Ceramic Etching Gel (Ivoclar Vivadent AG) and conditioned with Monobond Plus (Ivoclar Vivadent AG). The crowns will be luted as described for group 1 or 2. A final intraoral polishing step will be done with OptraGloss (Ivoclar Vivadent AG). All required light-curing steps are conducted with Bluephase G4 (Ivoclar Vivadent AG).'}], 'periods': [{'title': 'Overall Study', 'milestones': [{'type': 'STARTED', 'achievements': [{'groupId': 'FG000', 'numUnits': '3', 'numSubjects': '3'}, {'groupId': 'FG001', 'numUnits': '5', 'numSubjects': '5'}]}, {'type': 'COMPLETED', 'achievements': [{'groupId': 'FG000', 'numUnits': '3', 'numSubjects': '3'}, {'groupId': 'FG001', 'numUnits': '5', 'numSubjects': '5'}]}, {'type': 'NOT COMPLETED', 'achievements': [{'groupId': 'FG000', 'numUnits': '0', 'numSubjects': '0'}, {'groupId': 'FG001', 'numUnits': '0', 'numSubjects': '0'}]}]}], 'typeUnitsAnalyzed': 'crowns', 'recruitmentDetails': 'Patients were recruited from 04.10.2021 to 01.03.2023 in the clinic.'}, 'baselineCharacteristicsModule': {'denoms': [{'units': 'Participants', 'counts': [{'value': '3', 'groupId': 'BG000'}, {'value': '5', 'groupId': 'BG001'}, {'value': '8', 'groupId': 'BG002'}]}], 'groups': [{'id': 'BG000', 'title': 'Crowns self-adhesively cemented', 'description': 'Group 1 receives crowns with an occlusal thickness of 1.5 mm and luted with a self-adhesive, self-curing resin cement (SpeedCem Plus, Ivoclar Vivadent AG).\n\nLithium disilicate crowns: The study population is separated in two groups. The teeth will be etched in total etch mode with 37% phosphoric acid (Total Etch, Ivoclar Vivadent AG). After the application of Adhese Universal-adhesive (Ivoclar Vivadent AG), MultiCore Flow (Ivoclar Vivadent AG) will be applied. The crowns will be polished, then etched with IPS Ceramic Etching Gel (Ivoclar Vivadent AG) and conditioned with Monobond Plus (Ivoclar Vivadent AG). The crowns will be luted as described for group 1 or 2. A final intraoral polishing step will be done with OptraGloss (Ivoclar Vivadent AG). All required light-curing steps are conducted with Bluephase G4 (Ivoclar Vivadent AG).'}, {'id': 'BG001', 'title': 'Crowns adhesively luted', 'description': 'Group 2 receives crowns with an occlusal thickness of 1.2 mm delivered with a dual-curing resin cement (Variolink Esthetic (DC),Ivoclar Vivadent AG).\n\nLithium disilicate crowns: The study population is separated in two groups. The teeth will be etched in total etch mode with 37% phosphoric acid (Total Etch, Ivoclar Vivadent AG). After the application of Adhese Universal-adhesive (Ivoclar Vivadent AG), MultiCore Flow (Ivoclar Vivadent AG) will be applied. The crowns will be polished, then etched with IPS Ceramic Etching Gel (Ivoclar Vivadent AG) and conditioned with Monobond Plus (Ivoclar Vivadent AG). The crowns will be luted as described for group 1 or 2. A final intraoral polishing step will be done with OptraGloss (Ivoclar Vivadent AG). All required light-curing steps are conducted with Bluephase G4 (Ivoclar Vivadent AG).'}, {'id': 'BG002', 'title': 'Total', 'description': 'Total of all reporting groups'}], 'measures': [{'title': 'Age, Customized', 'classes': [{'title': '> 18 years', 'denoms': [{'units': 'Participants', 'counts': [{'value': '3', 'groupId': 'BG000'}, {'value': '5', 'groupId': 'BG001'}, {'value': '8', 'groupId': 'BG002'}]}], 'categories': [{'measurements': [{'value': '3', 'groupId': 'BG000'}, {'value': '5', 'groupId': 'BG001'}, {'value': '8', 'groupId': 'BG002'}]}]}], 'paramType': 'NUMBER', 'unitOfMeasure': 'participants'}, {'title': 'Sex: Female, Male', 'classes': [{'denoms': [{'units': 'Participants', 'counts': [{'value': '3', 'groupId': 'BG000'}, {'value': '5', 'groupId': 'BG001'}, {'value': '8', 'groupId': 'BG002'}]}], 'categories': [{'title': 'Female', 'measurements': [{'value': '0', 'groupId': 'BG000'}, {'value': '5', 'groupId': 'BG001'}, {'value': '5', 'groupId': 'BG002'}]}, {'title': 'Male', 'measurements': [{'value': '3', 'groupId': 'BG000'}, {'value': '0', 'groupId': 'BG001'}, {'value': '3', 'groupId': 'BG002'}]}]}], 'paramType': 'COUNT_OF_PARTICIPANTS', 'unitOfMeasure': 'Participants'}, {'title': 'Race and Ethnicity Not Collected', 'classes': [{'denoms': [{'units': 'Participants', 'counts': [{'value': '0', 'groupId': 'BG000'}, {'value': '0', 'groupId': 'BG001'}, {'value': '0', 'groupId': 'BG002'}]}], 'categories': [{'measurements': [{'value': '0', 'groupId': 'BG002'}]}]}], 'paramType': 'COUNT_OF_PARTICIPANTS', 'unitOfMeasure': 'Participants', 'populationDescription': 'Race and Ethnicity were not collected from any participant.'}]}}, 'documentSection': {'largeDocumentModule': {'largeDocs': [{'date': '2021-07-27', 'size': 238944, 'label': 'Study Protocol and Statistical Analysis Plan', 'hasIcf': False, 'hasSap': True, 'filename': 'Prot_SAP_002.pdf', 'typeAbbrev': 'Prot_SAP', 'uploadDate': '2025-09-26T06:08', 'hasProtocol': True}]}}, 'protocolSection': {'designModule': {'phases': ['NA'], 'studyType': 'INTERVENTIONAL', 'designInfo': {'allocation': 'RANDOMIZED', 'maskingInfo': {'masking': 'DOUBLE', 'whoMasked': ['PARTICIPANT', 'OUTCOMES_ASSESSOR']}, 'primaryPurpose': 'TREATMENT', 'interventionModel': 'PARALLEL'}, 'enrollmentInfo': {'type': 'ACTUAL', 'count': 8}}, 'statusModule': {'whyStopped': 'Material did not perform accordingly in other clinical trials.', 'overallStatus': 'TERMINATED', 'startDateStruct': {'date': '2021-10-04', 'type': 'ACTUAL'}, 'expandedAccessInfo': {'hasExpandedAccess': False}, 'statusVerifiedDate': '2025-09', 'completionDateStruct': {'date': '2023-03-01', 'type': 'ACTUAL'}, 'lastUpdateSubmitDate': '2025-09-26', 'studyFirstSubmitDate': '2021-09-27', 'resultsFirstSubmitDate': '2025-04-10', 'studyFirstSubmitQcDate': '2021-09-27', 'lastUpdatePostDateStruct': {'date': '2025-10-23', 'type': 'ESTIMATED'}, 'resultsFirstSubmitQcDate': '2025-07-29', 'studyFirstPostDateStruct': {'date': '2021-10-07', 'type': 'ACTUAL'}, 'resultsFirstPostDateStruct': {'date': '2025-08-14', 'type': 'ACTUAL'}, 'primaryCompletionDateStruct': {'date': '2023-03-01', 'type': 'ACTUAL'}}, 'outcomesModule': {'primaryOutcomes': [{'measure': 'Number of Crowns With Short-term Post-operative Sensitivity', 'timeFrame': '4 weeks', 'description': 'assessed by patient\'s weekly feedback for 4 weeks after the treatment rating sensitivity from 1 "no sensitivity" to 4 "severe discomfort noted routinely with cold or pressure stimulation"'}], 'secondaryOutcomes': [{'measure': 'Quality Criteria (Modified FDI Criteria)', 'timeFrame': '4 weeks', 'description': 'assessed following the FDI criteria on a scale from 1 "very good" to 5 "unacceptable" (e.g. surface lustre, Staining, and colour match of restorations)'}]}, 'oversightModule': {'isUsExport': False, 'isFdaRegulatedDrug': False, 'isFdaRegulatedDevice': True}, 'conditionsModule': {'conditions': ['Caries', 'Dental Trauma']}, 'descriptionModule': {'briefSummary': 'CAD-CAM crowns made of experimental lithium disilicate (shades A1, A2 and A3) are placed in patients by using either a dual-curing adhesive or a self-adhesive luting material in combination with total etch/universal bonding agent.'}, 'eligibilityModule': {'sex': 'ALL', 'stdAges': ['ADULT', 'OLDER_ADULT'], 'minimumAge': '18 Years', 'healthyVolunteers': False, 'eligibilityCriteria': 'Inclusion Criteria:\n\n* Patients will be at least 18 years of age, of either gender, and of any ethnic background.\n* Each patient should have at least one carious lesion or defective restoration to be restored on a maxillary or mandibular premolar or molar tooth.\n* Each lesion or defective restoration should exhibit sufficient size or loss of tooth structure requiring a full crown restoration.\n* The tooth should have at least one opposing tooth in occlusion and one adjacent tooth with an intact proximal contact.\n* All teeth will test vital and be asymptomatic at the beginning of treatment. No more than two restorations will be placed per patient.\n\nExclusion Criteria:\n\n* Devital or sensitive teeth\n* Teeth with prior endodontic treatment of any kind\n* Teeth with a history of direct or indirect pulp capping procedures\n* Patients with significant untreated dental disease to include periodontitis and/or rampant caries\n* Women who self-report that they are possibly pregnant, pregnant, or lactating, as elective dental treatment is not indicated at these times\n* Patients with a self-reported past history of allergies to the materials to be used in the study including composite resin cements or ceramic restorative materials\n* Patients unable to return for the recall appointments'}, 'identificationModule': {'nctId': 'NCT05070416', 'briefTitle': 'Lithium Disilicate Crowns Study', 'organization': {'class': 'INDUSTRY', 'fullName': 'Ivoclar Vivadent AG'}, 'officialTitle': 'Clinical Evaluation of Lithium Disilicate CAD/CAM Crowns', 'orgStudyIdInfo': {'id': 'LL3986001'}, 'secondaryIdInfos': [{'id': 'HUM00191892', 'type': 'REGISTRY', 'domain': 'IRBMED (Medical School Institutional Review Board)'}]}, 'armsInterventionsModule': {'armGroups': [{'type': 'EXPERIMENTAL', 'label': 'Crowns self-adhesively cemented', 'description': 'Group 1 receives crowns with an occlusal thickness of 1.5 mm and luted with a self-adhesive, self-curing resin cement (SpeedCem Plus, Ivoclar Vivadent AG).', 'interventionNames': ['Device: Lithium disilicate crowns']}, {'type': 'EXPERIMENTAL', 'label': 'Crowns adhesively luted', 'description': 'Group 2 receives crowns with an occlusal thickness of 1.2 mm delivered with a dual-curing resin cement (Variolink Esthetic (DC),Ivoclar Vivadent AG).', 'interventionNames': ['Device: Lithium disilicate crowns']}], 'interventions': [{'name': 'Lithium disilicate crowns', 'type': 'DEVICE', 'description': 'The study population is separated in two groups. The teeth will be etched in total etch mode with 37% phosphoric acid (Total Etch, Ivoclar Vivadent AG). After the application of Adhese Universal-adhesive (Ivoclar Vivadent AG), MultiCore Flow (Ivoclar Vivadent AG) will be applied. The crowns will be polished, then etched with IPS Ceramic Etching Gel (Ivoclar Vivadent AG) and conditioned with Monobond Plus (Ivoclar Vivadent AG). The crowns will be luted as described for group 1 or 2. A final intraoral polishing step will be done with OptraGloss (Ivoclar Vivadent AG). All required light-curing steps are conducted with Bluephase G4 (Ivoclar Vivadent AG).', 'armGroupLabels': ['Crowns adhesively luted', 'Crowns self-adhesively cemented']}]}, 'contactsLocationsModule': {'locations': [{'zip': '48109-1078', 'city': 'Ann Arbor', 'state': 'Michigan', 'country': 'United States', 'facility': 'University of Michigan School of Dentistry', 'geoPoint': {'lat': 42.27756, 'lon': -83.74088}}], 'overallOfficials': [{'name': 'Dennis J. Fasbinder, DDS', 'role': 'PRINCIPAL_INVESTIGATOR', 'affiliation': 'University of Michigan School of Dentistry, Department of Cariology, Restorative Sciences & Endodontics'}]}, 'ipdSharingStatementModule': {'ipdSharing': 'NO'}, 'sponsorCollaboratorsModule': {'leadSponsor': {'name': 'Ivoclar Vivadent AG', 'class': 'INDUSTRY'}, 'collaborators': [{'name': 'University of Michigan', 'class': 'OTHER'}], 'responsibleParty': {'type': 'SPONSOR'}}}}