Sign Up Now
Get instant access to over 1 million+ study documents
OR
Already registered? click here to login
By creating your account, you agree to our terms of service, privacy policy and student honor code.
According to the study, the clinical evidence does not recommend the application of implanto-prosthetic zirconium abutments in a patient's molar region.
Nakumura et al. (2010) conducted a systematic review of Zirconium as a dental implant abutment matter. The focus of their study was to assess the already published data on the concept of concerning zirconia dental implant abutments.
The work was focused on the study of the mechanical properties of zirconium abutments, the peri-implant soft tissues that surround zirconia abutments, plaque accumulation on the zirconia as well as the survival of the zirconia abutments.
The selected studies indicated that the that the zirconium abutments were very reliable in the anterior region from both mechanical and biologic perspectives.The studies also concluded that in comparison with titanium, zirconium abutments may be a material surface that is less attractive for phenomenon of early plaque retention.
The study further indicated that 3 clinical follow-up studies showed that zirconium abutments could as well function without any fracture as well as peri-implant lesions. Nakumura et al. (2010) concluded that on the basis of the literature review, zirconium has a great potential of being used as a perfect dental abutment material but there is a need for further studies on certain issues.
Ekfeldt, Furst and Carlsson (2011) conducted a retrospective as well as a clinical follow-up study aimed at evaluating zirconia abutments for use in single-tooth implant restorations. The objective of the study was to evaluate the outcome of clinical trials of custom-designed zirconia abutments for use in implant-supported single-tooth restorations for a period of up to five years after insertion. Retrospective evaluation was the first pert of the...
The second part of the study involved the clinical examination of a total of twenty five patients who had forty restorations that were placed more than three years ago. The implants were placed by oral surgeons and the prosthodontic treatments were duly provided at clinics that were being ran by prosthodontic specialist. The restoration process was either a screw-retained single piece restoration or all-ceramic crown for the cementation. The results indicated that in for both cases, the zirconium abutments had a good performance in the follow-up period. The biological and technical complication rates were low and most patients were generally satisfied with the process of restoration. The paper concluded that Zirconium abutments for use in single-patient crowns appeared to demonstrate an acceptable level of biological and technical results.
References
Ekfeldt a, Furst B. Carlsson GE (2011) Zirconia abutments for single-tooth implant restorations: a retrospective and clinical follow-up study. Clin. Oral Impl. Res. 22,; 1308-1314 doi: 10.1111/j.1600-0501.2010.02114.x
Gomes, a., Montero, J (2011).Zirconia implant abutments: A review. Med Oral Patol Oral Cir Bucal. 2011 Jan 1;16 (1):e50-5.
Nakamura K, Kanno T, Milleding P, Ortengren U.(2010).Zirconia as a dental implant abutment material: a systematic review. Int J. Prosthodont. 2010 Jul-Aug;23(4):299-309
Velazquez-Cayon R, Vaquero-Aguilar C, Torres-Lagares D, Jimenez-Melendo M, Gutierrez-Perez JL.(2011).Mechanical resistance of zirconium implant abutments: A review of the literature. Med Oral Patol Oral Cir Bucal. 2011 Dec 6.
Extant literature has been dedicated to the evaluation of closed head injuries using the Canadian Scale and New Orleans criteria for Adult patients in rural areas.The work of Stielle et al. (2005) explored the comparison of the Canadian CT head rule and the New Orleans Criteria in various Patients suffering from minor head injuries. Their work indicated that the current application of computed tomography (CT) for cases of minor head
Some of the spatial plots that were obtained are shown below. Figure 2: Diagrams showing the Mean vortex (a and b) of the azimuthal velocity profiles at different positions along the tunnel length. Phillips and Graham (1984) carried out a study on how to measure Reynolds-stress in a turbulent trailing vortex. The work described into detail how the measurement of turbulent trailing vortex in a condition of zero pressure is carried
, 2001) The use of support vector machine learning is widely supported to be used to notice micro calcification clusters in the digital mammograms. It is indeed a learning tool that originated from modern statistical theory of learning. (Vapnik, 1998). In the recent past years, SVM learning has got a large range of real life applications. This includes handwritten digit detection (Scholkopf et al., 1997), recognition of object, (Pontil&Verri, 1998), identification
Extant literature has been dedicated to the concept of corporate ethics and governance. In regard to the Satyam scenario, Afsharipour (2010) discussed the expectations as well as challenges that face the Indian corporate governance landscape. The paper discussed corporate reforms that were put in place as a consequence of the Satyam fraud. The author recognizes the dire need for proper governance in the entire Indian corporate landscape as a consequence
The authors pointed out the fact that the integration of semantic Web with the existing remote sensing processes can help in solving the problem. The ability of the remote sensing of information to provide certain functions in an online environment is superb. This results in dynamic transfer of information across the web. The authors further points out the fact that semantic information processing gives rise to semantic-based service reasoning
The use of open-ended questions that require multiple items in the answering points were observed to lead to a sharp increase in the attrition rate (Crawford et al.,2001). The use of questions that are organized into tables in conducting the various forms of web surveys was also observed to increase the rate of attrition (Knapp & Heidingsfelder, 1999).The advantages of using the web-based surveys to the designer is the