THE EFFECT OF ANTERIOR-POSTERIOR SPREAD AND CANTILEVER LENGTH ON THE SUPPORTING STRUCTURES OF MAXILLARY SCREW RETAINED PROSTHESIS | ||||
Egyptian Dental Journal | ||||
Article 36, Volume 63, Issue 2 - April (Fixed Prosthodontics, Dental Materials, Conservative Dentistry & Endodontics), April 2017, Page 1955-1964 PDF (1.52 MB) | ||||
Document Type: Original Article | ||||
DOI: 10.21608/edj.2017.75174 | ||||
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Authors | ||||
Heba E. Khorshid; Nora M. Sheta | ||||
Lecturer, Department of Prosthodontics, Faculty of Oral and Dental Medicine, Cairo University. | ||||
Abstract | ||||
Purpose: The Target of this work was to study the effect of three different ratios of anterior-posterior spread to the cantilever length on the supporting structures of implant- screw retained maxillary prosthesis ; Materials and Methods: In this study, maxillary implant screw retained prostheses were placed in fifteen completely edentulous patients. Each patient received six implants in the maxilla. Patients were divided into three equal groups; Group I, II & III according to the ratio of anterior-posterior implant spread to the cantilevers lengths (CL/ AP). The / CL AP ratio was 1:1, 1:2 and 1:3 in the three groups respectively. In this Study, crestal bone height changes around each implant were evaluated at time of prostheses insertion, four, eight and twenty-four months later using CBCT. Results: The results of this study revealed that the least bone height loss was noticed in Group III. Statistically significant difference was reported between Groups I, II& III in bone height loss. Conclusion: Within the limitation of this study, it might be concluded that the cantilever extension to antero-posterior implant spread with 1:3 ratio might have induced the least crestal bone height loss around each implant in maxillary screw retained prostheses. | ||||
Keywords | ||||
edentulous maxillae; screw retained restorations; anterio-posterior spread; cantilever length | ||||
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