RESUMO
Most studies concur that denture wearers have only about one fifth to one fourth the bite strength and masticatory force of natural dentition subjects. There appears to be a wide range of acceptable chewing forces, as evidenced by the wide variation in bite strength of natural dentition subjects. However, bite strength and masticatory forces in denture wearers fall below the natural dentition range and therefore it is concluded that denture wearers are handicapped in bite force. The occlusal form of the posterior denture teeth did not significantly influence masticatory force.
Assuntos
Força de Mordida , Oclusão Dentária , Análise do Estresse Dentário , Prótese Total , Mastigação , Análise de Variância , Humanos , Transdutores de PressãoRESUMO
The effect of two alkaline glutaraldehyde base disinfectants on a heat-cured denture base resin was evaluated by the flexural strength, the repair flexural strength, and the surface morphology of the material that had been immersed up to 12 hours in the disinfecting solutions. The flexural strength of the material was not significantly affected by either disinfectant. The disinfectant with phenolic buffer caused surface pitting of the material after 10 minutes of immersion, and softening and swelling of the surface after 2 hours of immersion. No apparent surface change was observed with the regular alkaline formulation, however. Between the two repair resins, the autopolymerized resin yielded greater repair flexural strength than the light-cured repair resin. However, the repair flexural strength of autopolymerized resin seemed to be influenced by either disinfecting solution whereas the light-cured repair resin was not affected.
Assuntos
Resinas Acrílicas , Aldeídos , Bases de Dentadura , Desinfetantes , Glutaral , Fenômenos Químicos , Físico-Química , Elasticidade , Teste de Materiais , Propriedades de Superfície , Fatores de TempoAssuntos
Surdez , Educação em Odontologia , Estudantes de Odontologia , Ensino/métodos , Feminino , HumanosRESUMO
The contourmeter was used to determine quantitatively the denture displacements caused by various impression materials and techniques during the relining of a maxillary denture. This study indicated the following conclusions. Tissue-conditioning material used with closed-mouth impression technique or light-bodied polysulfide used with either open- or closed-mouth technique caused the least denture displacement in the three dimensions when compared with regular-bodied polysulfide or zinc oxide and eugenol impression materials. Comparing the same impression materials used with either open- or closed-mouth technique showed no significant difference in maxillary denture displacements. A relined complete denture should be remounted on the articulator and the occlusion refined to eliminate occlusal mismatches resulting from three-dimensional denture displacements during relining.
Assuntos
Técnica de Moldagem Odontológica , Oclusão Dentária Balanceada , Reembasamento de Dentadura , Prótese Total Superior , Materiais para Moldagem Odontológica , Técnica de Moldagem Odontológica/instrumentação , Reembasadores de Dentadura , Retenção de Dentadura , Prótese Total Superior/efeitos adversos , Humanos , Condicionamento de Tecido Mole OralRESUMO
While he was being fitted for complete dentures, the patient swallowed the central bearing plate that had become detached. The plate was lodged in the hypopharyngeal region of the pharynx and, with the patient under intravenous sedation, laryngoscope and biopsy forceps were used to retrieve it. Precautions that must be taken to prevent such occurrences include the proper attachment of the device components and testing for security, as well as upright positioning of the patient. The components should be explained to patients and they should be given instructions to eject immediately any part of the device that becomes dislodged.
