Abstract
Objectives. High and prominent cheekbones have long been considered a standard of beauty in many cultures. Different materials have been used to augment the malar region, hydroxyapatite granules being one of them. Volumetric stability is one of the key factors for predictability and patient satisfaction. Main disadvantage of using hydroxyapatite granules mixed with collagen is the decrease of implant volume. To counteract this volume loss, it is required to use excessive amount of material initially.
To evaluate volumetric changes of 90 malar implants in 45 patients over 12-month period after surgery and to analyze the amount of volume decrease.
Materials and Methods. Volumetric analysis was performed on CBCT images of patients that received HAP/collagen implants to augment malar region during orthognathic surgery. To find volumetric changes and the corresponding areas in which they occur, voxel-based superimpositions of the examination data were done. To calculate volumetric differences the areas of interest were segmented to form a closed area and then filled to form solid objects followed by Boolean operations to determine the changes quantitatively and qualitatively. For every patient each cheekbone was analyzed separately.
Results. Volume loss was most prominent during first 4 months after surgery, resorption rate after 4 months was minimal. Median volume increase after surgery was 2923mm3 and after 12 months the median 3 volume of implants was 2028 mm , that amounted to median volume loss of 26.35%
Conclusions. Volume loss of hydroxyapatite/collagen implants can be detected. Method of CBCT analysis, described in this work, provides valuable info about volumetric stability of implants.
This project has received funding from the European Union’s Horizon 2020 research and innovation program under the grant agreement No 857287.
To evaluate volumetric changes of 90 malar implants in 45 patients over 12-month period after surgery and to analyze the amount of volume decrease.
Materials and Methods. Volumetric analysis was performed on CBCT images of patients that received HAP/collagen implants to augment malar region during orthognathic surgery. To find volumetric changes and the corresponding areas in which they occur, voxel-based superimpositions of the examination data were done. To calculate volumetric differences the areas of interest were segmented to form a closed area and then filled to form solid objects followed by Boolean operations to determine the changes quantitatively and qualitatively. For every patient each cheekbone was analyzed separately.
Results. Volume loss was most prominent during first 4 months after surgery, resorption rate after 4 months was minimal. Median volume increase after surgery was 2923mm3 and after 12 months the median 3 volume of implants was 2028 mm , that amounted to median volume loss of 26.35%
Conclusions. Volume loss of hydroxyapatite/collagen implants can be detected. Method of CBCT analysis, described in this work, provides valuable info about volumetric stability of implants.
This project has received funding from the European Union’s Horizon 2020 research and innovation program under the grant agreement No 857287.
| Original language | English |
|---|---|
| Pages (from-to) | 492 |
| Number of pages | 1 |
| Journal | Medicina (Kaunas) |
| Volume | 59 |
| Issue number | Suppl.2 |
| Publication status | Published - 30 Aug 2023 |
| Event | RSU Research Week 2023: Research Week 2023 Rīga Stradiņš University - Riga Stradins University, Riga, Latvia Duration: 27 Mar 2023 → 31 Mar 2023 https://rw2023.rsu.lv/general-information https://rw2023.rsu.lv |
Field of Science*
- 3.1 Basic medicine
- 3.2 Clinical medicine
Publication Type*
- 3.4. Other publications in conference proceedings (including local)