Tomographic Assessment of reinforcement of acrylic resin denture base for palateless implant locator retained maxillary over denture.

Document Type : Original Article

Authors

1 Associate Professor of Prosthodntics, Faculty of Oral and Dental Medicine, Future University.

2 Assistant professor of Oral & Maxillofacial Surgery, Faculty of Oral and Dental Medicine Modern University for Technology and Information

Abstract

Objectives: This study was conducted to evaluate the effect of metallic (cobalt chromium), glass fiber and nano zirconia oxide reinforcement of acrylic resin denture base on the peri-implant crestal bone level changes in palateless locator retained maxillary over denture.
Materials and Methods: Twenty-one completely edentulous male patients with maladaptive experience to maxillary dentures were selected to participate in this study. For all patients maxillary four implant-retained overdenture was constructed following the same basic principles. Every patient received four implants, two in the canine region with (3.6 mm in diameter & 12mm in length), and two in the second premolar region with ( 4.5 mm in diameter & 8mm in length); (Tiologic® Implants, Dentaurum, Ispringen, Germany) . Metal (cobalt chromium) reinforced over denture was constructed for the first group , while 5% fiber reinforced acrylic resin denture was constructed for the second group and Overdenture was reinforced using 5% of nano ZrO2 for the group three patients. . Follow up visits were scheduled twelve and twenty four after implant loading for inspection of the prosthesis and radiographic evaluation Peri-implant crestal bone level changes were assessed using intra-oral radiographs taken .
Results: The findings of the present study demonstrates that all the studied denture base reinforcement materials individually showed significance bone loss around implants (p < 0.05) after 12 months follow up period.
Conclusion: Within the limitations of this study, reinforcement of polymethyl methacrylate denture base with glass fiber or nano zirconia oxide should be considered in palateless implant retained maxillary over denture.

Keywords

Egyptian Dental Journal
Volume 67, Issue 3 - Serial Number 4
July (Fixed Prosthodontics, Removable Prosthodontics and Dental Materials)
July 2021
Pages 2499-2508

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