Evaluation of masticatory muscle activity and survival rate of single implant-retained mandibular overdenture fabricated from thermoplastic versus conventional acrylic resin. A randomized controlled trial | ||||
| Egyptian Dental Journal | ||||
| Article 9, Volume 67, Issue 1 - January (Fixed Prosthodontics, Removable Prosthodontics and Dental Materials), January 2021, Page 571-581 PDF (1.87 MB) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/edj.2020.46976.1295 | ||||
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| Authors | ||||
Wafaa Ibrahim   1; Dina Elawady2
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| 1Lecturer, Department of Prosthodontics, Faculty of Oral and Dental Medicine, Delta University for Science and Technology, Egypt. | ||||
| 2Lecturer, Department of Removable Prosthodontics, Faculty of Dentistry, Modern Science and Arts University (MSA), Egypt. | ||||
| Abstract | ||||
| Background: Electromyographic (EMG) activities of single implant-retained mandibular overdentures (MODs) has been dubious. Midline fracture of the denture is the most common complication related to Single implant-retained MODs. Thermoplastic polymethylmethacrylate (PMMA) acrylic resin achieves even distribution of forces and helps in absorption of impact forces which occurs during functional and parafunctional activities. Aim of the study: This clinical study aimed to investigate whether thermoplastic PMMA can improve the EMG activity and decrease the incidence of denture fracture in single implant- retained MODs. Materials and Methods: A randomized controlled trial was designed, where 28 completely edentulous patients (15 male, 13 female) were enrolled and randomly divided into two equal groups. Group I (control group) received single implant- retained MOD fabricated from conventional PMMA and group II received a single implant- retained MOD fabricated from thermoplastic PMMA acrylic resin. Patients’ muscle activity was evaluated at baseline and at 3, 6 and 12 months using EMG. The survival rate of MOD was evaluated by recording the incidence of mid-line fractures. Results: There was a significant improvement in the EMG activity of the masseter and temporalis muscle of the thermoplastic PMMA group in all the follow-up periods. There was a non-statistically significant difference in the MOD survival between groups. However, the decrease in fracture incidence was clinically significant in the thermoplastic PMMA acrylic MOD group. Conclusion: Within the limitation of this study, it was concluded that the fabrication of single implant-retained MODs from thermoplastic PMMA acrylic resins improves masticatory muscle activity and overdenture survival. | ||||
| Keywords | ||||
| Masticatory muscle activity; single implant-retained mandibular overdenture; thermoplastic acrylic resin; conventional acrylic resin | ||||
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