Retrospective Study on Clinical Performance of Screw-retained Implant Crowns

Study Overview
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Brief Summary
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Survival and success rates of all-ceramic implant-supported fixed reconstructions fabricated with CAD/CAM technology after at least one year in function. Survival and success rates (clinical, radiologic and esthetic) of all-ceramic implant-supported fixed reconstructions fabricated with CAD/CAM technology after 2 to 10 years in function. Establishment of a database of patients with all-ceramic implant-supported fixed reconstructions fabricated with CAD/CAM technology for future longitudinal retrospective studies.

Official Title
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Clinical Performance of One-piece Screw-retained Implant Crowns Base on CAD/CAM Hand-veneered Zirconium Dioxide Customized Abutments With a 6 Years and 7 Months Mean Follow-up

Conditions
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Dental Implant Failed

Intervention / Treatment
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* Other: Dental prosthetics


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: Patients with at least one fixed all-ceramic reconstruction (single implant restoration on BL implant with individualized zirconia abutment directly screwed and directly veneered, three- to five-unit zirconia bridges directly veneered, single tooth crown made of a lithium disilicate glass-ceramic (LS2) blank) Written informed consent Exclusion Criteria: Pregnancy at the time of the follow-up examination Mental handicap Patients that could not be contacted/located Patients not interested in participating Patients with the need of antibiotic prophylaxis prior to a clinical examination

Ages Eligible for Study
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Minimum Age: 18 Years

Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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Accepts Healthy Volunteers

Study Plan
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How is the study designed?
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Design Details

Primary Purpose: Treatment
Intervention Model: Single Group Assignment
Masking: None (Open Label)


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Experimental: Zirconia implant-supported crown<br>Full zirconia implant-supported crown | Other: Dental prosthetics<br>* Implant-supported crowns<br>|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Survival and success rates of all-ceramic implant-supported fixed reconstructions | Number of all-ceramic implant-supported fixed reconstructions fabricated with CAD/CAM technology still in place after at least one year in function. | 1 year | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Number of patients with biological complications assessed via clinical examination | A clinical evaluation of the implant crowns will be performed in order to detect any kind of biological complication, namely periimplantitis and perimucositis | 1 year | 
| Number of patients with biological complications assessed via periapical x-ray | A radiological evaluation of the implant crowns will be performed to measure and evaluate the bone crestal changes | 1 year | 
| Number of patients with technical complications | A clinical evaluation of the implant crowns will be performed in order to detect any kind of complication, namely chipping, screw loosening or abutment fracture | 1 year | 
| Patient satisfaction as assessed by VAS A | Patients assess by patient questionnaire their implant reconstructions, in terms of function by means of a Visual Analog Scale (VAS A), where the parameter will be scored from 1 to 10. | 1 year | 
| Patient satisfaction as assessed by VAS B | Patients assess by patient questionnaire their implant reconstructions, in terms of esthetics by means of a Visual Analog Scale (VAS B), where the parameter will be scored from 1 to 10. | 1 year | 
| Esthetic outcome | The esthetic examination included the Pink and White Esthetic Score Assessment (PES/WES) according to Belser et al. 2009 & Furhäuser et al. 2005 on a scale from 0-10 whereas 10 means an optimal outcome. | 1 year |