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Randomized clinical trial to compare between biting force of mandibular complete denture constructed from two different materials; metal reinforced polyamide and conventional PMMA,The null hypothesis of the study that there will not be a difference between biting force of the complete denture constructed from metal reinforced polyamide and PMMA
Polyamide resins used in dentistry exhibit high flexibility, physical strength, heat and chemical resistance and the exceedingly rare allergy response. Although flexural strength, modulus of elasticity and rigidity of nylon (polyamide) denture base materials are relatively low, they demonstrate great impact strength, toughness, and resistance to fracture. It was suggested that by adding glass fibers to polyamides, their stiffness and other mechanical properties could be increased. The flexural properties of nylon denture base materials has promoted their usage only in conditions like unyielding undercuts, pronounced tuberosities, tori and bulging alveolar ridges. In 2013 Wadachi etal compared rigidity of polyamide and PMMA when used as a denture base material and concluded that; the modulus of elasticity of polyamide was very low in comparison to PMMA and was lower than ISO standard, and so they recommended that polyamide to be used as a denture base material it should be reinforced with metal frame
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| Label | Type | Description | Intervention Names |
|---|---|---|---|
| Poly-amide | Experimental | new thermoplastic material used as a denture base, that has excellent ethetics and flexibility |
|
| poly-methyl methacrylate | Active Comparator | Polymethylmethacrylate is one of the most widely used denture base material, because of its good biocompatibility, reliability and dimensional stability |
|
| Name | Type | Description | Arm Group Labels | Other Names |
|---|---|---|---|---|
| Poly-amide | Other | New denture base material that exhibit high flexibility, physical strength, heat and chemical resistance and the exceedingly rare allergy response |
|
| Measure | Description | Time Frame |
|---|---|---|
| Biting force | Bite force will be measured for both types of complete denture after one month of denture insertion . The recorded force during maximal clenching was obtained with I-load sensor placed between pairs of opposing teeth at one side and wood tongue depressor at the other side. The meter and depressor were located at the area of premolar/molar where there is more number of occlusal contacts with strong determinant of muscle action and subsequent great bite force. | One month |
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Inclusion Criteria:
Exclusion Criteria:
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| Name | Role | Phone | Extension | |
|---|---|---|---|---|
| Hadeer Abdel hadi Abd elhameed, master | Contact | 01158834401 | hadeerhadi1990@gmail.com | |
| nadia abbas | Contact |
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| Facility | Status | City | State | ZIP | Country | Contacts |
|---|---|---|---|---|---|---|
| Hadeer Hadi | Cairo | 002 | Egypt |
|
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| ID | Term |
|---|---|
| D009757 | Nylons |
| D019904 | Polymethyl Methacrylate |
| ID | Term |
|---|---|
| D010969 | Plastics |
| D011108 | Polymers |
| D046911 | Macromolecular Substances |
| D001697 | Biomedical and Dental Materials |
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Participants are assigned to two more groups in parallel for the duration of the study
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|
| Poly-methyl methacrylate | Other | Gold standard denture base material |
|
|
| D008420 |
| Manufactured Materials |
| D013676 | Technology, Industry, and Agriculture |
| D008768 | Methylmethacrylates |
| D011109 | Polymethacrylic Acids |
| D000179 | Acrylates |
| D000144 | Acids, Acyclic |
| D002264 | Carboxylic Acids |
| D009930 | Organic Chemicals |
| D000180 | Acrylic Resins |
| D012117 | Resins, Synthetic |