ABSTRACT
PURPOSE: To describe and characterize the surface topography and cleanliness of CAD/CAM manufactured zirconia abutments after steaming and ultrasonic cleaning. MATERIALS AND METHODS: A total of 12 ceramic CAD/CAM implant abutments of various manufacturers were produced and randomly divided into two groups of six samples each (control and test group). Four two-piece hybrid abutments and two one-piece abutments made of zirconium-dioxide were assessed per each group. In the control group, cleaning by steam was performed. The test group underwent an ultrasonic cleaning procedure with acetone, ethyl alcohol and antibacterial solution. Groups were subjected to scanning electron microscope (SEM) analysis and Energy-dispersive X-ray spectroscopy (EDX) to verify and characterize contaminant chemical characterization non-quantitatively. RESULTS: All zirconia CAD/CAM abutments in the present study displayed production-induced wear particles, debris as well as organic and inorganic contaminants. The abutments of the test group showed reduction of surface contamination after undergoing an ultrasonic cleaning procedure. However, an absolute removal of pollutants could not be achieved. CONCLUSION: The presence of debris on the transmucosal surface of CAD/CAM zirconia abutments of various manufacturers was confirmed. Within the limits of the study design, the results suggest that a defined ultrasonic cleaning process can be advantageously employed to reduce such debris, thus, supposedly enhancing soft tissue healing. Although the adverse long-term influence of abutment contamination on the biological stability of peri-implant tissues has been evidenced, a standardized and validated polishing and cleaning protocol still has to be implemented.
Subject(s)
Acetone , Ceramics , Ethanol , Spectrum Analysis , Steam , UltrasonicsABSTRACT
PURPOSE: To describe and characterize the surface topography and cleanliness of CAD/CAM manufactured zirconia abutments after steaming and ultrasonic cleaning. MATERIALS AND METHODS: A total of 12 ceramic CAD/CAM implant abutments of various manufacturers were produced and randomly divided into two groups of six samples each (control and test group). Four two-piece hybrid abutments and two one-piece abutments made of zirconium-dioxide were assessed per each group. In the control group, cleaning by steam was performed. The test group underwent an ultrasonic cleaning procedure with acetone, ethyl alcohol and antibacterial solution. Groups were subjected to scanning electron microscope (SEM) analysis and Energy-dispersive X-ray spectroscopy (EDX) to verify and characterize contaminant chemical characterization non-quantitatively. RESULTS: All zirconia CAD/CAM abutments in the present study displayed production-induced wear particles, debris as well as organic and inorganic contaminants. The abutments of the test group showed reduction of surface contamination after undergoing an ultrasonic cleaning procedure. However, an absolute removal of pollutants could not be achieved. CONCLUSION: The presence of debris on the transmucosal surface of CAD/CAM zirconia abutments of various manufacturers was confirmed. Within the limits of the study design, the results suggest that a defined ultrasonic cleaning process can be advantageously employed to reduce such debris, thus, supposedly enhancing soft tissue healing. Although the adverse long-term influence of abutment contamination on the biological stability of peri-implant tissues has been evidenced, a standardized and validated polishing and cleaning protocol still has to be implemented.
Subject(s)
Acetone , Ceramics , Ethanol , Spectrum Analysis , Steam , UltrasonicsABSTRACT
El tratamiento con implantes dentales ha demostrado ser predecible para reemplazar los dientes perdidos o defectuosos. Este caso clínico presenta un paciente con ausencia de las coronas de los incisivos centrales superiores. Luego de una evaluación clínica y radiográfica detallada del tejido blando y óseo, se realizaron las exodoncias de las raíces de los centrales superiores sin levantamiento de un colgajo, seguido de la colocación de 2 implantes, relleno óseo y provisionalización inmediata. Al paciente se le instruyó para que llevara una dieta blanda durante 3 semanas y fue evaluado semanalmente durante un mes y luego mensualmente durante un período de cicatrización de 4 meses. Después de la estabilización del tejido blando y duro, se procedió a la colocación de las coronas definitivas con aditamentos de zirconia. Los resultados que se pueden apreciar luego de la colocación de los implantes y la provisionalización inmediata en el sector estético anterior del maxilar superior nos indican un predecible grado de éxito con esta técnica. Por lo que podemos concluir que esta técnica puede ser aplicada y recomendada siempre y cuando exista un adecuado diagnóstico y protocolo de tratamiento que brinde una correcta selección del caso y asegure una tasa de éxito similar a otras técnicas.
Treatment with dental implants has shown to be a predictable treatment to replace defective or lost teeth. A clinical case is presented on a patient with absence of the crowns of the upper central incisors. After a detailed clinical evaluation of the bone and soft tissue, a root extraction without a flap elevation was performed, followed immediately by the insertion of two implants and provisional crowns and a bone graft. The patient was instructed to follow a soft diet for 3 weeks, and was followed up weekly for a month, and then monthly for a period of 4 months. After the stabilization of the soft and hard tissues, the final crowns using zirconia abutments were inserted. The results shown after placement of the immediate dental implants and provisionalization in the anterior esthetic zone of the maxilla demonstrate a predictable grade of success with this technique. In conclusion, this technique can be applied and recommended when there is an adequate diagnosis and treatment protocol that provides a correct selection of the case in order to ensure a rate of success similar to other techniques.
Subject(s)
Humans , Male , Adult , Tooth Extraction , Dental Implants , Dental Implantation, Endosseous/methods , Dental Restoration, Temporary/methods , Esthetics, Dental , Immediate Dental Implant Loading , Incisor , Maxilla/surgery , Zirconium , Computer-Aided Design , Crowns , Dental Restoration, Temporary , Esthetics, DentalABSTRACT
Objective: This study evaluated the peri-implant clinical parameters of zirconia versus metallic abutments for standardized custom-made implant supported single-tooth restorations. Material and Methods: Sixteen subjects received 30 dental implants on esthetic region of upper jaws. Test group had 14 implant-supported single-tooth restorations with ceramic abutment and control group had 16 restorations with metallic abutment. Peri-implant clinical parameters were recorded after 110 ± 10 days in function at six sites by each implant, in each subject. The means of clinical measures: probing depth (PD) and clinical attachment level (CAL); mean of percentages of sites with visible plaque (VP), bleeding on probing (BOP) and suppuration (SU) were recorded to each subject. To verify differences between groups Mann Whitney U-test was selected PD and CAL and k-light test VP, BOP and SU. Results: One zirconia implant-supported single-tooth restoration fractured at insertion time. The mean of PD, CAL, and BOP of the samples sites were lower to test group than control (p < 0.05). There were no differences of mean levels of VP and S between test and control group (p > 0.05). Conclusion: Clinical parameters around implant-supported restorations were influenced by abutment type with better results to zirconia abutments, at least, after short time period evaluation.
Objetivo: O objetivo deste estudo foi avaliar os parâmetros clínicos peri-implantares de próteses unitárias implantossuportadas em região anterior e posterior confeccionadas sobre pilares de zircônia versus metálico. Material e métodos: Dezesseis indivíduos receberam 30 implantes dentários na região estética da maxila. Para o grupo teste confeccionouse 14 coroas sobre implante utilizando pilares de zircônia e para o grupo controle confeccionou-se 16 coroas sobre implante utilizando pilares de metal. Os parâmetros clínicos peri-implantares foram avaliados após 110 ± 10 dias em função. A média das medidas clínicas: profundidade de sondagem (PD) e nível clínico de inserção (NCI); média da porcentagem de sítios apresentando placa visível (PV), sangramento à sondagem (SS) e supuração (SUP) foram computados para cada indivíduo assim como entre os grupos avaliados. As diferenças foram avaliadas pelos testes de Mann-Whitney para PD e NCI e k-light para PV, SS e SUP. Resultados: Uma coroa com pilar de zircônia fraturou no momento da inserção. A média de PS, NCI e SS foi menor para o grupo teste em relação ao controle (p < 0,05). Não houve diferenças entre PV e SUP entre os grupos teste e controle (p > 0,05). Conclusão: os parâmetros clínicos ao redor das próteses implantossuportadas foram influenciados pelo tipo de pilar com melhores resultados para a zircônia, pelo menos no período avaliado.
Subject(s)
Humans , Dental Implantation , Dental ImplantsABSTRACT
Uma paciente de 32 anos de idade compareceu para tratamento em função da mobilidade do canino decíduo e, após a análise radiográfica, constatou-se o canino permanente impactado. Após o planejamento ortodôntico conjunto, estes elementos foram extraídos e um implante colocado em carga imediata com biomaterial para preenchimento do defeito. A restauração cerâmica definitiva foi realizada sobre um pilar de zircônia e os controles após dez anos ainda mostram excelente resultado estético.
A 32 years-old patient was refered to the dental clinic due to mobility of a deciduous canine and after radiographic analysis an impacted permanent canine was observed. Upon an orthodontic decision making process, those teeth were extracted and a dental implant immediate loaded in addition to a biomaterial to fill the remaining defect. The ceramic definitive restoration was made over a zirconia abutment and the esthetic result is still excellent after 10 years of follow-up.