Construct stability in anterior open wedge osteotomy: assessing 3D-printed polylactic acid wedges against cortical bone
Background - This in-vitro biomechanical study aimed to assess whether using a wedge as a gap filler in anterior open wedge osteotomy of the proximal tibia reduces load on the screw-plate construct and to evaluate if a 3D-printed polylactic acid wedge offers similar biomechanical stability like a bo...
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| Main Authors: | , , , , , |
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| Format: | Article (Journal) |
| Language: | English |
| Published: |
May 2025
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| In: |
Clinical biomechanics
Year: 2025, Volume: 125, Pages: 1-7 |
| ISSN: | 1879-1271 |
| DOI: | 10.1016/j.clinbiomech.2025.106509 |
| Online Access: | Verlag, kostenfrei, Volltext: https://doi.org/10.1016/j.clinbiomech.2025.106509 Verlag, kostenfrei, Volltext: https://www.sciencedirect.com/science/article/pii/S0268003325000828 
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| Author Notes: | Kai Hoffeld, Jan P. Hockmann, Christopher Wahlers, Peer Eysel, Michael Hackl, Johannes Oppermann |
| Summary: | Background - This in-vitro biomechanical study aimed to assess whether using a wedge as a gap filler in anterior open wedge osteotomy of the proximal tibia reduces load on the screw-plate construct and to evaluate if a 3D-printed polylactic acid wedge offers similar biomechanical stability like a bone wedge. - Methods - Twenty-four cadaveric proximal tibiae were randomly assigned to one of three groups: TomoFix plate alone as control group, TomoFix plate with a bone wedge, and TomoFix plate with a 3D-printed polylactic acid wedge. The specimens were subjected to axial loads of 400 N, 800 N, and 1200 N for 1000 cycles. Compression depth and axial stiffness were measured to assess stability. - Findings - There were no significant differences in overall compression depth or axial stiffness between the groups (p > 0.05). At 1200 N, hinge fractures occurred in 6 of 8 specimens in the control group, compared to 0 of 8 in the wedge groups. Both bone and polylactic acid wedges improved construct stability, with the polylactic acid wedge performing comparably to the bone wedge. - Interpretation - Gap fillers, whether bone or polylactic acid wedges, may contribute construct stability in anterior open wedge osteotomy of the proximal tibia. The 3D-printed polylactic acid wedge may be biomechanically comparable to the bone wedge, suggesting its potential as an alternative in clinical applications. |
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| Item Description: | Online veröffentlicht: 2. April 2025, Artikelversion: 4. April 2025 Gesehen am 04.06.2025 |
| Physical Description: | Online Resource |
| ISSN: | 1879-1271 |
| DOI: | 10.1016/j.clinbiomech.2025.106509 |