Resorption of the alveolar crest, especially of the buccal plate, characterizes the healing extraction socket. Therefore, reduction of the vertical and horizontal dimension of the extraction site compromise the aesthetics and complicate rehabilitation. Alveolar Ridge preservation (ARP) has shown excellent results, minimizing the dimensional changes in order to facilitate an easier restoration especially when dental implants are used. The purpose of this poster is to present a series of 16 cases where ARP was performed with the use of dense-PTFE non-resorbable membrane in combination with different kind of bone grafting materials.
Background : Dental implants have become one of the most sought-after procedures within the last decades. Inevitably, this has aroused tremendous demands in aesthetics and function, whereas the prevalence of peri-implant pathology and its consequences are ever more evident. Zirconia implants appear with an increasing frequency in clinical practice, especially due to the accretive number of papers published on titanium corrosion those recent years. Aim/Hypothesis : The aim of this presentation is to introduce the concept of and current knowledge status on zirconia implants, as well as evidence that support their clinical applications within certain limits. Materials and Methods : An extensive review of the current literature was conducted on the online databases PubMed, Embase, Google Scholar and Cochrane Library, as well as some scientific books. Results : Zirconia implants are particularly useful in the esthetic zone, since their color does not reflect through the tissues. Moreover, many patients refuse to have metal parts inserted in their organism. Those implants demonstrate a high degree of biocompatibility, tissue integration, as well as low affinity to plaque and favorable biomechanical properties. Their mechanical stability can be reinforced by polycrystals of yttrium. As far as their disadvantages are concerned, early failures seem to be more frequent in comparison to titanium implants. Moreover, technical failures, such as fractures occur. In preclinical studies, the short-term results are very promising, although early bone loss appears to be slightly increased. This observation is present in clinical studies as well. However, surface modifications seem to have a positive impact on bone apposition. Conclusions and Clinical Implications : Overall, all current data and available meta-analyses demonstrate a very promising tool to be furtherly studied in the future, as there is a lack of long-term success and survival rates.
Background : Edentulous maxilla combined with extremely atrophic alveolar crest is a challenge for the clinician. Bone augmentation is achieved with a variety of methods using graft materials (autogenous or substitutes) and missing teeth are replaced by implant supported prostheses.The placement of the implants is possible to be with a fully guided approach.Aim/Hypothesis : The purpose of this poster is to present two case reports with atrophic maxilla and the reconstruction of the upper jaw with bone augmentation procedures and implant placement.Material and Methods : Two women in the sixth decade of their lives, came for rehabilitation of upper jaw, wishing implant placement and fixed prosthesis if possible. Narrow temporary implants were placed to support temporary denture. Bilateral sinus floor elevation and guided bone regeneration (GBR) in the anterior maxilla performed in both patients, 8 weeks later. After 7 months of uninterrupted healing, six implants were placed in the second case, whereas in case no1 seven implants were placed fully guided. In both cases cover screws were maintained for 6 months. The patients recovered normally without complications and final fixed prosthesis was created for each patient.Results : Clinical and radiographical examination of the patients showed significant dimensional changes on the alveolar crest after bone augmentation. The restoration with dental implants without the need of further augmentation techniques was performed in both cases and 6 months later final fixed prosthesis was delivered on each patient. Both patients were fully pleased with the aesthetic and functional result. Conclusion and ClinicalImplications : Regeneration of the severely absorbed maxilla is possible using several augmentation techniques.Although excellent results can be achieved without the need of fully guided surgery, the use of those tools offers greater accuracy in implant placement and reduces the intraoperative time, especially in cases with edentulous maxilla or mandible. Combination of techniques shows surgeons flexibility and offers the best possible result to the patient.
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