ABSTRACT
A forma mais comum de reabilitação de mandíbulas edêntulas com implantes osseointegrados é a prótese total fixa parafusada tipo protocolo de Brånemark, na qual os implantes são esplintados. Este relato de caso clínico apresenta uma forma alternativa de reabilitação total de mandíbulas edêntulas, com 14 implantes cone-morse e coroas totais metalocerâmicas isoladas. Foram discutidos aspectos referentes ao planejamento, com ênfase no planejamento virtual, na necessidade de disponibilidade óssea para realização deste tipo de tratamento, nas facilidades de higienização desta modalidade de reabilitação, nas considerações biomecânicas do caso, sobretudo quanto aos possíveis riscos em manter os implantes isolados, na seleção adequada dos implantes e dos componentes protéticos, nos benefícios do conceito de platform switching incorporados aos implantes cone-morse, nos cuidados necessários de manutenção, entre outros aspectos. A técnica é extremamente delicada em todas as suas etapas, sobretudo nas fases de planejamento e cirúrgica, visando a excelência do posicionamento dos implantes, para permitir a utilização de componentes protéticos pré-fabricados (munhões universais retos) sem a necessidade de usinagem. Este tipo de reabilitação mandibular mostrou-se muito eficiente, apresentando como principais vantagens a estética otimizada, a facilidade de higienização, o aspecto emocional muito favorável e uma extrema satisfação da paciente.
The most common treatment type for edentulous mandible is the full-fixed prosthesis according to the Branemark protocol with splinted dental implants. This case report presents an alternative option with cone Morse implants, straight universal abutments, and single metal-ceramic crowns. Aspects such as virtual implant planning, bone availability, biomechanical risks for single-tooth implants, prosthetic component selection, platform-switching, and maintenance are discussed, among others. The technique is very delicate in each step, particularly at surgery and three-dimensional implant positioning for pre-fabricated prosthetic components (straight universal abutments) without previous modifications. This kind of mandibular rehabilitation was very efficient and has the advantages of esthetics, easy cleaning, favorable emotional aspects and good patient satisfaction.
Subject(s)
Humans , Female , Aged , Crowns , Dental Implantation, EndosseousABSTRACT
Objective To observe the effect of all-ceramic crowns and metal ceramic crowns in the application of full denture prosthesis. Methods 86 patients who received full denture prosthesis in the Yunnan Transportation Center Hospital of Yunnan Province from January 2012 to September 2012 were chosen as the research object. According to the order of patients admission tag,patients with the odd tag were as the control group,patients with the even were as the observation group, and 43 patients in each group. Patients in the control group received metal ceramic crown repair, and patients in the observation group received all-ceramic crown repair. Patients in the two groups were followed up for 12 months to 24 months, and the black line on the gingival cervical margin, periodontal damage and porcelain crowns crack were compared between the two groups. Results The cervical margin black line ratios in the observation group and the control group were 2.33%(1/43) and 18.60% (8/43), the difference was statistically significant ( <0.05) . 11.63% (5/43) of patients in the observation group appeared cracks and fracture, compared with the control group of 2.33% (1/43), there was a statistically significant difference ( <0.05) . Conclusion Compared with etal ceramic crowns, all-ceramic crowns in full denture prosthesis have less injury in periodontal tissue and weaker anti-crack intensity, so the clinicians should choose the all-ceramic crowns based on the patients' indications.
ABSTRACT
Objective:To investigate the effects of abutment finish line curvature on fitness of metal ceramic crowns.Methods:Three types of finish line curvatures' abutments were prepared (1 mm-curvature, 3 mm-curvature and 5 mm-curvature). For each type of abutment, ten metal ceramic crowns were fabricated (five for facial-veneered type, five for full-veneered type). Then the fitness of the crowns were evaluated. Results:In as-cast group, both for facial-veneered type and full-veneered type, the greater the finish line curvature was, the larger gaps the mesial and distal margins of copings exhibited. Compared with labial and lingual margins, the mesial and distal margins of copings for 5 mm-curvature crowns in full-veneered type showed significantly larger gaps (respectively 35?8 micrometers and 36?8 micrometers) (P