Measuring Biting Force of Poly-amide Complete Dentures

Cairo University (CU)

Status: Unknown

Conditions: Complete Edentulism

Treatments: Other: Poly-methyl methacrylate; Other: Poly-amide

Study type: Interventional

Funder types: Other

Identifiers

NCT03253510

Poly-amide complete dentures

Details and patient eligibility

About

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

Full 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

Enrollment: 24 estimated patients

Sex: All

Ages: 45 to 65 years old

Volunteers: Accepts Healthy Volunteers

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

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

Trial design

Primary purpose: Treatment

Allocation: Randomized

Interventional model: Parallel Assignment

Masking: Double Blind

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24 participants in 2 patient groups

Poly-amide

Experimental group

Description:

new thermoplastic material used as a denture base, that has excellent ethetics and flexibility

Treatment:

Other: Poly-amide

poly-methyl methacrylate

Active Comparator group

Description:

Polymethylmethacrylate is one of the most widely used denture base material, because of its good biocompatibility, reliability and dimensional stability

Treatment:

Other: Poly-methyl methacrylate