RESUMO
PURPOSE: To assess the handling characteristics of a gallium alloy triturated with one drop (10 microL) of ethyl alcohol and compare them to those of a high-copper amalgam. MATERIALS AND METHODS: A commercial gallium alloy (Gallium Alloy GFII) and a high-copper amalgam (Tytin) were used. Ten dentists each restored four identical MO preparations in acrylic typodont teeth (two for each material). Each restoration was immediately evaluated by the operator for placement, condensation, proximal contact, carving, and resistance to fracture during matrix removal and overall quality according to a method used previously. The rating scale for each criterion ranged from 1 (very poor) to 5 (very good). Scores for each criterion for the amalgam and gallium alloy restorations were statistically compared. RESULTS: The gallium alloy tested was still rated significantly worse (P < or = 0.05) than amalgam for placement, condensation and carving but there were no significant differences in scores for other criteria. The dentists judged the handling of the gallium alloy in all criteria as fair to good and evaluated it as better in placement, condensation and establishment of proximal contact compared to a previous study, mainly because the pre-set material was no longer sticky.
Assuntos
Ligas Dentárias/química , Etanol/química , Gálio/química , Amálgama Dentário/química , Adaptação Marginal Dentária , Restauração Dentária Permanente/métodos , Restauração Dentária Permanente/estatística & dados numéricos , Humanos , Modelos Dentários , Variações Dependentes do Observador , Fatores de TempoRESUMO
The handling characteristics of a gallium alloy (Gallium Alloy GF) were compared to those of a spherical high-copper amalgam (Tytin). Ten dentists each restored four identical MO preparations in acrylic typodont teeth (no. 30), two with amalgam and two with gallium alloy. Each restoration was evaluated immediately following completion by the operator for six clinically relevant criteria. Each criterion was scored between 1 and 5, where 1 = very poor, 2 = poor, 3 = fair, 4 = good, and 5 = very good. Three two-sided Mann-Whitney tests were used to compare the median scores for significant differences (P < 0.05). The first test indicated no significant difference between scores for the first- and second-placed restorations, within criteria and within alloy type (n = 10). The second test indicated a significant difference between amalgam and gallium alloy, within criteria and within restoration sequence (n = 10), for each criterion except resistance to fracture during removal of the matrix band. The third test indicated a significant difference between amalgam and gallium alloy, within each criteria, combining scores for first- and second-placed restorations (n = 20). During simulated clinical placement, amalgam was rated significantly higher than gallium alloy in each handling characteristic evaluated.
Assuntos
Ligas Dentárias , Amálgama Dentário , Gálio , Restauração Dentária Permanente/métodos , Estudos de Avaliação como Assunto , Teste de MateriaisRESUMO
Individuals are living longer with more chronic and disabling conditions than previous generations of adults. In addition, they are retaining more of their natural dentition than ever before. As a result, it will be common for a dentist in practice in the next 20 to 30 years to care for many patients with special needs. These individuals offer unique challenges to the dental practitioner. Dentists must be knowledgeable in the oral aspects of various medical conditions and the systemic manifestation of oral diseases. In addition to the oral medicine aspects of practice, dentists must be skilled clinically to care for the unique restorative needs with which these patients present. As individuals age or become chronically ill, people deserve the opportunity to select from all that modern dentistry has to offer. Patients must be involved intimately in the decision-making process. No dental professional should assume because a patient is old or chronically ill that he or she lacks the financial resources or the desire to maintain his or her oral health.
Assuntos
Assistência Odontológica para Idosos , Restauração Dentária Permanente/métodos , Idoso , Coroas , Cárie Dentária/terapia , Facetas Dentárias , Humanos , Restaurações Intracoronárias , Expectativa de Vida , Planejamento de Assistência ao Paciente , Cárie Radicular/terapia , Estados UnidosRESUMO
Older adults are visiting their dentists more frequently than in the past and expecting higher levels of oral health throughout their lives. Special considerations for this age group and marketing tips are discussed.
Assuntos
Assistência Odontológica para Idosos , Administração da Prática Odontológica , Idoso , Idoso de 80 Anos ou mais , Consultórios Odontológicos , Feminino , Humanos , Decoração de Interiores e Mobiliário , Expectativa de Vida , Masculino , Marketing de Serviços de Saúde , Anamnese , Planejamento de Assistência ao PacienteRESUMO
Freshly extracted molar teeth were prepared for complete cast gold crowns cemented with either zinc phosphate cement, polycarboxylate cement, glass ionomer cement, a resin luting agent, or a zinc oxide-eugenol temporary cement. The specimens were tested at 1-, 6-, and 12-month intervals with radioactive 45Ca. The specimens were sectioned, autoradiographs were made, and the marginal leakage was evaluated on a scale of 0 to 3. The results showed that zinc phosphate, polycarboxylate, and glass ionomer cements are equally suited for permanent cementation of restorations. The resin luting agent showed high initial leakage, indicating that it is not as desirable for permanent cementation purposes. The zinc oxide-eugenol cement showed increased leakage with time but is well suited for its indicated purpose, temporary cementation.
