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| Name | Class |
|---|---|
| Institut Straumann AG | INDUSTRY |
| Ivoclar Vivadent AG | INDUSTRY |
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The objective of this study is to assess the survival rate and the biological and technical outcomes of onlays and single crowns made out of different restorative materials on vital and non-vital teeth. The onlays are made either out of a lithium-disilicate glass ceramic (E.max CAD, Ivoclar Vivadent), hybrid ceramic (VITA ENAMIC, VITA Zahnfabrik) or out of a lithium aluminosilicate glass ceramic reinforced with lithium disilicate (N!ce, Straumann). The crowns are made either out of lithium aluminosilicate glass ceramic reinforced with lithium disilicate (N!ce, Straumann), hybrid ceramic (VITA ENAMIC, VITA Zahnfabrik) or lithium-disilicate glass ceramic (E.max CAD, Ivoclar Vivadent).
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| Label | Type | Description | Intervention Names |
|---|---|---|---|
| Crown restoration | Active Comparator | The tooth is restored with a conventional, full-coverage crown. |
|
| Onlay restoration | Experimental | The tooth is restored with a defect-oriented onlay. |
|
| Name | Type | Description | Arm Group Labels | Other Names |
|---|---|---|---|---|
| Crown preparation | Procedure | The conventional crown preparation will be performed. |
| |
| Measure | Description | Time Frame |
|---|---|---|
| Restoration survival | Survival of the inserted restorations | 5 years |
| Measure | Description | Time Frame |
|---|---|---|
| Fractures of the restorations. | Any chipping (uncritical fractures) or critical fractures will be assessed. | 5 years |
| Tooth vitality | The presence or absence of tooth vitality will be assessed by means of vitality test using cold spray. |
| Measure | Description | Time Frame |
|---|---|---|
| Restoration wear | Wear of the restorations by measuring the surface changes of the restorations over time. This is analyzed by means of digital intraoral scanning at different time points and measured in micrometers. | 5 years |
Inclusion Criteria:
• Subjects with the need for a fixed reconstruction in premolar and molar region with indication for either crown or onlay.
Exclusion Criteria:
Specific criteria:
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| Facility | Status | City | State | ZIP | Country | Contacts |
|---|---|---|---|---|---|---|
| University of Geneva | Geneva | Canton of Geneva | 1204 | Switzerland |
because of private patient data .
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| ID | Term |
|---|---|
| D003731 | Dental Caries |
| ID | Term |
|---|---|
| D017001 | Tooth Demineralization |
| D014076 | Tooth Diseases |
| D009057 | Stomatognathic Diseases |
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| Onlay preparation |
| Procedure |
A defect-oriented tooth preparation is performed for an onlay restoration. |
|
| 5 years |
| Biological outcome - presence of secondary caries | Biological outcome - presence of secondary caries - of the treated teeth using magnification loops, a dental probe and radiographs. | 5 years |
| Biological outcome - Bleeding on Probing | Bleeding on probing measures of the treated tooth using a periodontal probe. | 5 years |
| Biological outcome - Plaque index | Assessment of the Plaque index of the treated tooth using a dental probe. | 5 years |
| Biological outcome - tooth fractures | Assessment of tooth /root fractures using a dental probe and magnification loops. | 5 years |
| Biological outcome - pocket probing depth | The pocket probing depth will be assessed in millimeters with a periodontal probe with 1mm distances. | 5 years |