Download or read book Computer-assisted Surgery in the Rehabilitation of the Upper Maxilla with Zygomatic Implants U00f1 a Cohort Study Comparing Atrophic and Oncologic Patients. Preliminary Results at 5 Years Follow-up written by Agnese Ferri and published by . This book was released on 2017 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The new trend of the last years is the research of the minimally invasive approach for the implant-supported rehabilitations. The new three-dimensional technologies, like static and dynamic navigation, as well as the use of tilted and zygomatic implants, allow the surgeons to reduce bone grafting procedures. Zygomatic implants can be considered a reliable method to treat severe maxillary bone atrophy or defects due to resection for cancer. The aim of this study is to evaluate the survival and success of rehabilitation with zygomatic implants in atrophic and oncologic patients using 3D computer technologies.Since 2013, 20 patients were treated with zygomatic implants (Southern Implants, Irene, South Africa) u201311 with severely atrophic maxilla and 9 with maxillary defects for oncologic issues. All of the patients carried out 3D virtual planning to choose the implant length and the surgeon used a dynamic navigation system (Implanav) for trying to reproduce it clinically. A screw-retained prosthesis was delivered for both groups. Clinical and radiographic outcomes and correspondence between planned implant length and the postoperative one were evaluated. Complications were recorded. All the patients filled the quality of life questionnaire before the surgery, after the prosthetic rehabilitation and during the follow up period.The mean follow-up period was 31 months (10-60 months). The patient age ranged from 50 to 88 years (mean 64 months). 74 zygomatic implants were placed. The implant survival rate was 97.3%. The prosthetic survival rate was 100%. An immediate-loading of the implants was possible in 18 cases. Two oncologic patients received a delayed loading. A correspondence of 74.8% between the planned and real implant length was found. Two implantu2019s failures occurred in the first year, one implant for each group. Biological complications (transient mucositis) occurred more often in oncologic patients while prosthetic complications were more frequent in atrophic patients. All the complications were easily solved. The OHIP14 score increased with 65% in terms of satisfaction.Rehabilitation with zygomatic-implants seems to be a reliable technique in atrophic and oncologic patients. The three-dimensional computer-aided approach could help the surgeon in the surgical planning increasing the surgical and prosthetic outcomes. The early prosthesis-loading certainly allows a better functional outcomes. However, clinical trials with longer follow-up are necessary to definitively assure the reliability of this technique.