Surface Hardness and Wear Characteristics of Prefabricated and CAD/CAM Milled Artificial Teeth

Study Overview
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Brief Summary
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Purpose: This study aimed to assess the 3-dimentional wear )3D) (volumetric loss) and 2-dimentional wear (2D) (vertical loss) and surface hardness of ready-made (prefabricated) and CAD/CAM milled artificial denture teeth. material and methods: In a cross-over study design, ten completely edentulous patients were randomly chosen for this study and given two complete dentures. The first complete denture was constructed with pre-fabricated teeth. The second complete denture was constructed with CAD\CAM milled teeth. The complete denture teeth were 3D scanned at the time of insertion (T0), after three months (T3), and after six months (T6) of denture insertion. Utilizing 3D surface superimposition techniques, the vertical (2D wear), and Volumatic (3D wear) material loss were measured. The hardness of the teeth were evaluated at the time of denture insertion (T0) then after 6 months (T6) of denture insertion by Vickers hardness test. Statistical analysis was done using SPSS software. Paired groups were compared by paired t test. Significant difference was considered if P ≤ 0.05.

Official Title
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Surface Hardness and Wear Resistance of Prefabricated and CAD/CAM Milled Artificial Teeth: A Cross-over Clinical Study

Conditions
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Surface Hardness and Wear Resistance of Artificial Teeth

Intervention / Treatment
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* Other: surface hardness test for denture teeth
* Other: wear resistance of denture teeth measurement


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: completely edentulous angle class I maxillomandibular relations Exclusion Criteria: Angle's class II, III maxillomandibular relation systemic disease that affect the bone and soft tissue health

Ages Eligible for Study
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Minimum Age: 55 Years
Maximum Age: 65 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: Other
Allocation: Randomized
Intervention Model: Crossover Assignment
Masking: None (Open Label)


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Other: complete denture with prefabricated artificial teeth<br>complete denture constructed with prefabricated artificial teeth and inserted in the patient mouth to be used for 3, 6 months | Other: surface hardness test for denture teeth<br>* surface hardness test of denture teeth at insertion then after 6 months of use<br>Other: wear resistance of denture teeth measurement<br>* 2D, Vertical wear, 3D Volumetric wear were measured for denture teeth<br>|
| Other: complete denture with CAD\CAM milled artificial teeth<br>complete denture constructed with CAD\CAM Milled artificial teeth and inserted in the patient mouth to be used for 3, 6 months | Other: surface hardness test for denture teeth<br>* surface hardness test of denture teeth at insertion then after 6 months of use<br>Other: wear resistance of denture teeth measurement<br>* 2D, Vertical wear, 3D Volumetric wear were measured for denture teeth<br>|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| wear resistance of denture artificial teeth | 2D, 3D wear of denture teeth were measured using denture scanning and superimposition of the sanning at insertion to that after 3, 6 months using Exocad soft ware | 6 months after denture use | 
| surface hardness of the denture artificial teeth | the measurement of surface hardness was done using Vickers's test. this measurements was done at insertion then after 6 months | 6 months after denture use |