Measuring Biting Force of Poly-amide Complete Dentures

Not Applicable

• Conditions: Complete Edentulism
• Interventions: Other: Poly-methyl methacrylate; Other: Poly-amide

• Registration Number: NCT03253510
• Lead Sponsor: Cairo University

Brief Summary

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

Detailed Description

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

Basic Information
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Recruitment & Eligibility
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Study & Design
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Trial Locations

Study Timeline

• Status Verified: 2017-08
• Study First Submitted: 2017-08-10
• Study First Submitted QC: 2017-08-16
• Last Update Submitted: 2017-08-16
• Study First Posted: 2017-08-18
• Last Update Posted: 2017-08-18
• Study Start: 2017-09
• Primary Completion: 2018-03-01
• Study Completion: 2018-05-01

Recruitment & Eligibility

• Status: UNKNOWN
• Sex: All
• Target Recruitment: 24

Inclusion Criteria

1. Male or female patient with age range from fifty five to sixty five completely edentulous and in good medical condition
2. Patients have skeletal Angle's class I maxillo-mandibular relationship and sufficient inter arch distance.
3. Free from any systemic or neuromuscular disorder that might affect chewing efficiency of masticatory muscles.
4. Free from any tempro-mandibular disease.
5. Good oral hygiene

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Exclusion Criteria

1. Neuromuscular disorder and orofacial disease.
2. Tempromandibular joint and muscle pain
3. xerostomia or excessive salivation.
4. Limited mouth opening
5. Abnormal tongue behavior and/or size.
6. Intraoral soft and hard tissue pathosis

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Study & Design

• Study Type: INTERVENTIONAL
• Study Design: PARALLEL

Arm && Interventions

Group	Intervention	Description
poly-methyl methacrylate	Poly-methyl methacrylate	Polymethylmethacrylate is one of the most widely used denture base material, because of its good biocompatibility, reliability and dimensional stability
Poly-amide	Poly-amide	new thermoplastic material used as a denture base, that has excellent ethetics and flexibility

Primary Outcome Measures

Name	Time	Method
Biting force	One month	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.

Trial Locations

Locations (1)

Hadeer Hadi; 🇪🇬 Cairo, Egypt