Erkens, W.A.L. (2014) De invloed van klinische kroon-implantaatratio’s, vastgesteld aan de hand van digitale modellen en intra orale röntgenopnamen, op röntgenologische botveranderingen rondom implantaten. thesis, Dentistry.
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Abstract
Within the last years, there is an increasing use of short dental implants (<10 mm). Because of the use of short dental implants, there is less need for complex and expensive treatment, e.g. bone augmentation procedures. Even though good results are reported, theoretically, there is an increased risk of bone loss if compared to the use of implants with a conventional length. Publications are scarce on the role of the crown-implant ratio (C/I – ratio) with regard to bone level changes around dental implants. The aim of this study was to examine a possible correlation between the clinical C/I – ratio and bone level changes, measured on intraoral radiographs. The patient population in this study is originating from a clinical study on clinical performance of short dental implants. Plaster casts and x-ray results were delivered from that study. For the use in this study, the casts were digitized into three-dimensional models, which made it possible to estimate a more realistic C/I – ratio. Bone loss was calculated by comparison of the x-rays after one year of function with the x-rays from the onset of function. Statistics were done by comparison of means and logistic regression analysis. Forty-seven patients, with 62 implant-supported crowns in the posterior region, were included. All of the 31 implants in the lower jaw were of 6mm length. In the upper jaw, 11 mm (n=15) and 6 mm (n=16) implants were used randomly. A significant higher C/I – ratio was found for the 11 mm implants in comparison with the 6 mm implants. Also, significance was found for the higher C/I – ratio of implants in the lower jaw in comparison to the 6 mm implants in the upper jaw. In no case, a correlation was found between the C/I – ratio and bone level changes. It could be concluded that, within the limitations of this study, no correlation between clinical C/I – ratio and bone level changes, measured on intraoral radiographs, was found.
| Item Type: | Thesis (Thesis) |
|---|---|
| Supervisor name: | Meijer, Prof. Dr. H.J.A. |
| Faculty: | Medical Sciences |
| Date Deposited: | 25 Jun 2020 10:54 |
| Last Modified: | 25 Jun 2020 10:54 |
| URI: | https://umcg.studenttheses.ub.rug.nl/id/eprint/1504 |
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