Poelman, Mw. I. (2021) ‘De overleving van Straumann Standaard 3.3 mm diameter implantaten in de onderkaak vergeleken met Straumann Standaard 4.1 mm diameter implantaten geplaatst ten behoeve van een overkappingsprothese in combinatie met een staafmesostructuur met extensies’. thesis, Dentistry.
Full text available on request.Abstract
Introduction: There is a preserved view of placing a bar with distal extensions in combination with 3.3 mm oral implants because of risk of fracture. The aim of this study is to obtain more information about the survival rate of these implants with the following main question: what is the survival rate of 3.3 implants compared to 4.1 implants in the mandible in combination with a bar with distal extensions within a period of 12 years? Also a possible effect of sex and age on the survival rate is investigated in this study. Material and methods: A retrospective study was performed in a dental practice from June 2008 to August 2020. Data was collected of patients implanted with 4.1 or 3.3 oral implants in combination with a bar with distal extensions. Variables as sex, age and time in months was noted, even as implant variables such as diameter, type and number. Statistical analysis was performed with Kaplan-Meier Analysis and Log-rank tests. Results: A total of 29 patients with 3.3 implants and 60 patients with 4.1 implants were included. The mean observation period was 77 months, with a minimum of 2 and maximum of 148 months. Two implants were lost after 36 and 109 months. Within 12 years of observation the survival rate of 3.3 implants (86%) was significant lower (p=,041) compared to 4.1 implants (100%). A significant effect between the survival rate and age (p=,876) or sex (p=,080) was not found. Conclusion: The survival rate of 3.3 implants in the mandible was significant lower compared to the survival rate of 4.1 implants within 12 years of observation. There was no significant effect between age or sex and the survival rate. Based on the results of this study, 4.1 implants are still superior to 3.3 implants when placing a bar with distal extensions.
| Item Type: | Thesis (UNSPECIFIED) |
|---|---|
| Supervisor name: | Slot, Dr. J.W.A. |
| Faculty: | Medical Sciences |
| Date Deposited: | 29 Mar 2023 11:02 |
| Last Modified: | 29 Mar 2023 11:02 |
| URI: | https://umcg.studenttheses.ub.rug.nl/id/eprint/3464 |
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