Dental Crowns
Conditions
Brief summary
When missing tooth structure or teeth are replaced, minimal biologic risk should be involved to re-establish function and esthetics. The increased use of the adhesive technique and preservation of dental tissues have greatly impacted conservative tooth preparation design. The development use of zirconia technology and all-ceramic systems has opened the potential for fabrication inlays zirconia bridges with durability and good aesthetics. The purpose of this study is to clinically evaluate the placement of inlay bridge made of a Y-TZP framework veneered with a pressed ceramic and bonded with a completely adhesive approach in the replacement of a single missing tooth.
Detailed description
This study evaluates the use of inlay bridge made of Zirconia and all ceramic systems with three designs in the replacement process of one single tooth (i.e. a missing premolar or molar.) The first design is going to be fabricated with CAD/CAM Zirconia and the occlusal surface from e-max press. The second design is going to be fabricated with CAD/CAM Zirconia and the occlusal surface from e-max press and the internal surface coated with glaze layer to improve the adhesion. The third design is going to be fabricated with CAD/CAM Zirconia and the occlusal surface from e-max press and the internal surface coated with a layer of e-max ceramic press to improve the adhesion.
Interventions
PROCEDUREGlaze layer
A coating of a glaze layer will be used at the inner surface of the bridge to improve adhesion
PROCEDUREE-max Press layer
A coating of E-max Press layer will be used at the inner surface of the bridge to improve adhesion
Sponsors
Damascus University
Study design
Allocation
RANDOMIZED
Intervention model
PARALLEL
Primary purpose
TREATMENT
Masking
TRIPLE (Subject, Caregiver, Outcomes Assessor)
Eligibility
Sex/Gender
ALL
Age
18 Years to 50 Years
Healthy volunteers
No
Inclusion criteria
1. Good oral hygiene 2. Low susceptibility to caries 3. Parallel alignment of abutment teeth 4. Immobility of the abutment teeth 5. Minimum height of abutment teeth ≥ 5 mm (connector thickness) 6. Maximum mesio-distal extension of the inter-dental gap of 9 mm (width of premolar) or 12 mm (width of molar)
Exclusion criteria
* Severe para-functional habits. * Short clinical crowns (\<5 mm) * Extensive defects of the clinical crown, * Loosening of teeth because of factors related to the periodontal tissues.
Design outcomes
Primary
| Measure | Time frame | Description |
|---|---|---|
| Change in marginal fit | Immediately within five minutes following cementation (T1), 3 months (T2), 6 months (T3), 12 months (T4) following application | To examine if there is a gap between inlay margins and tooth cavity margins .It will be measured by a probe. |
| Change in the Retention Status | Immediately within five minutes following cementation (T1), 3 months (T2), 6 months (T3), 12 months (T4) following application | The resistance of a prosthesis to displacement will be measured. |
| Change in Material Integrity | Immediately within five minutes following cementation (T1), 3 months (T2), 6 months (T3), 12 months (T4) following application | To examine macroscopically the presence of cracks or fractures in the veneering ceramic (retainers or pontics) or any fractures at the connectors. |
Secondary
| Measure | Time frame | Description |
|---|---|---|
| Change in Marginal Color Matching | Immediately within five minutes following cementation (T1), 3 months (T2), 6 months (T3), 12 months (T4) following application | Examination will be done macroscopically to detect the presence of any difference in color between the margins of the tooth and inlays |
Other
| Measure | Time frame | Description |
|---|---|---|
| Change in Sensitivity | Immediately within five minutes following cementation (T1), 3 months (T2), 6 months (T3), 12 months (T4) following application | The presence of any spontaneous or stimulated pain will be assumed. |
| Change in Shade | Immediately within five minutes following cementation (T1), 3 months (T2), 6 months (T3), 12 months (T4) following application | The shade is going to be determined using Vita(R) shade guide. |
| Change in Patients' Satisfaction | Immediately within five minutes following cementation (T1), 3 months (T2), 6 months (T3), 12 months (T4) following application | A questionnaire will be used to detect the level of satisfaction regarding function and shade |
Countries
Syria
Outcome results
None listed