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Wear resistance is one of the most important physical properties of teeth, and wear resistance of zirconia against artificial acrylic, enamel and composite resin denture teeth has not been clearly established.
Implant-supported dental restorations present a higher threshold for occlusion perception when compared to natural teeth, which can occlusal overload mechanisms or lead to wear of rehabilitation materials or the antagonist arch.
In clinical conditions, however, many other factors influence the complex interaction between dental enamel and opposing substrates: patient-related factors such as dietary habits, dysfunctional occlusion, masticatory forces, and bruxism contribute to accelerated enamel loss of antagonist teeth.
It will be our intention to perform a prospective study and proof-of-concept to assess wear in natural dentition, Full arch implant supported rehabilitation (FAISR) and opposing arches. Wear according to type of rehabilitation and of opposing arch, technical complications, parafunction and number of placed implants will be assessed.
Intra-oral digital acquisition will be performed at pre-defined intervals. Changes over time will be assessed through a previously described digital superimposition methodology volumetric changes determined.
Patients will be scanned using an intraoral dental scanner (T0)
Patients will be recalled at every 4-months (T1), 8-months (T2) and 12-months (T3) visits for re-scanning and from there every 6-months
Scanned images will be compared using a metrology software to determine maximum vertical wear of teeth and root mean square wear.
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| Label | Type | Description | Intervention Names |
|---|---|---|---|
| Dentate Patients | Patients with natural dentition - maxilla and mandible |
| |
| Zirconia | Patients that have a full-mouth (maxilla or mandible) dental implant supported rehabilitation restored with monolithic zirconia biomaterial |
| |
| Hybrid Acrylic | Patients that have a full-mouth (maxilla or mandible) dental implant supported rehabilitation restored with acrylic material (hybrid acrylic) |
|
| Name | Type | Description | Arm Group Labels | Other Names |
|---|---|---|---|---|
| Monolithic Zirconia | Device | Maxillary or/and mandibular screw retained zirconia monolithic prostheses supported by at least 4 implants |
|
| Measure | Description | Time Frame |
|---|---|---|
| Wear of teeth and materials of restorations | Measure in different groups occlusal tooth wear from insertion (baseline) to 4, 8 and 12 months post-insertion Scanned images will be compared using a metrology software to determine maximum vertical wear of teeth and root mean square wear. | at least 12 months follow-up |
| Measure | Description | Time Frame |
|---|---|---|
| Wear of different antagonists | Measure occlusal tooth wear of antagonists from insertion (baseline) to 4, 8 and 12 months post-insertion Scanned images will be compared using a metrology software to determine maximum vertical wear of teeth and root mean square wear. | at least 12 months follow-up |
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Dentate Group :
Inclusion criteria
Exclusion criteria
- missing more than 4 teeth, extensive caries, bonded orthodontic brackets
Edentulous Group:
Inclusion Criteria:
Exclusion Criteria:
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Control Group: Healthy Patients, Dentate
Experimental Groups : Patients from a dental office that did a full-mouth (maxilla or mandible) implant-supported rehabilitation and made the final rehabilitation in either monolithic zirconia or hybrid-acrylic material
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| Name | Affiliation | Role |
|---|---|---|
| João M Caramês, Phd | Implantology Institute | Study Director |
| Duarte N Marques, Phd | Implantology Institute | Study Director |
| Artur F Simões, Msc | Implantology Institute | Principal Investigator |
| Facility | Status | City | State | ZIP | Country | Contacts |
|---|---|---|---|---|---|---|
| Artur Simões | Recruiting | Lisbon | 1070-061 | Portugal |
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| ID | Term |
|---|---|
| D057085 | Tooth Wear |
| D019217 | Tooth Attrition |
| ID | Term |
|---|---|
| D014076 | Tooth Diseases |
| D009057 | Stomatognathic Diseases |
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| Hybrid-Acrylic | Device | Maxillary or/and mandibular screw retained hybrid prostheses supported by at least 4 implants; |
|
| Dentate Patients | Behavioral | Dentate Patients with natural dentition or tooth supported crowns |
|