RESUMO
This study aims to investigate the effectiveness of monolithic translucent TZP with different colors and porcelain-layered TZP by evaluating their colors and strengths. Different mixing ratios of Zpex to Zpex-Yellow as translucent TZP, conventional opaque TZP (TZ-3YB-E) (Tosoh, Tokyo) as a control, and veneering porcelain (CERABIEN ZR, body porcelain, Noritake, Tokyo) with shade A3 as a typical shade. Disk-shaped specimens of 13 mm diameter and 1.5 mm thickness were prepared. These specimens were observed under reflected and transmitted light, and the translucency parameter (TP) values were measured. Strength was also evaluated with flexural strength in a biaxial bending test. The TP values of the monolithic TZP, Zpex100>Zpex70>Zpex50>TZ3YB, were larger in this order. The flexural strength of all the monolithic TZP showed approximately 1,000 MPa. It is suggested that colored translucent TZP is clinically useful when used as monolithic restorations.
Assuntos
Porcelana Dentária/química , Ítrio/química , Zircônio/química , Cor , Materiais Dentários/química , Análise do Estresse Dentário , Facetas Dentárias , Teste de Materiais , Maleabilidade , Propriedades de Superfície , Resistência à TraçãoRESUMO
A 57-year-old man presented with mesial inclination of the lower right first molar caused by untreated loss of the second premolar. The occlusal relationship was restored by dental implant treatment following improvement of the intraoral environment by orthodontic therapy. At his initial visit, the interdental spacing in the molar-premolar region was inadequate, as the first molar had mesially inclined into the extraction space of the second premolar. The patient had also lost the second molar and complained of masticatory problems on the right side. It was considered necessary to restore the second molar and improve the occlusal relationship with the first molar to recover occlusal function on the right side. After orthodontic therapy to correct the position of the mesially inclined tooth, occlusal restoration was carried out by dental implant treatment. The patient's clinical condition has remained excellent at over 5 years 2 months post-surgically and the patient is satisfied with the treatment outcome. The combination of dental implant treatment and orthodontic therapy were effective in improving the intraoral environment in this patient, indicating the efficacy of interdisciplinary treatment planning and practice.
Assuntos
Implantes Dentários , Má Oclusão/terapia , Dente Molar/patologia , Técnicas de Movimentação Dentária/métodos , Dente Pré-Molar/patologia , Coroas , Cárie Dentária/complicações , Implantação Dentária Endóssea/métodos , Prótese Dentária Fixada por Implante , Seguimentos , Humanos , Masculino , Má Oclusão/etiologia , Pessoa de Meia-Idade , Dente Molar/lesões , Planejamento de Assistência ao Paciente , Satisfação do Paciente , Fraturas dos Dentes/complicações , Perda de Dente/etiologia , Perda de Dente/reabilitação , Raiz Dentária/lesões , Resultado do TratamentoRESUMO
PATIENT: A 67-year-old female with root fracture of the maxillary central incisor underwent implant placement immediately after extraction, with the goal of shortening the treatment period. The superstructure was placed on the implant after a 4-month healing period. Review 5 years after implant loading revealed no clinical problems. DISCUSSION AND CONCLUSION: The treatment time was shortened effectively by the flapless immediate post-extraction placement procedure. Immediate post-extraction implant placement based on proper examination and diagnosis would reduce the patient burden.
