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Vet Comp Orthop Traumatol 2023; 36(04): 193-198
DOI: 10.1055/s-0043-1761246
Original Research

Effects of Angled Dynamic Compression Holes in a Tibial Plateau Levelling Osteotomy Plate on Cranially Directed Fragment Displacement

Richard C.Y. Looi 
1   Surgery Department, Small Animal Specialist Hospital, Sydney, Australia
,
Joanna D. White
2   Internal Medicine Department, Small Animal Specialist Hospital, Sydney, Australia
,
Daniel R. James
1   Surgery Department, Small Animal Specialist Hospital, Sydney, Australia
› Institutsangaben
Funding We thank Dr. Vince Frank from Knight Benedikt for providing the necessary implants needed for the study.
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Abstract

Objective To compare angled dynamic compression holes in a tibial plateau levelling osteotomy (TPLO) plate to a commercially available TPLO plate in an ovine cadaveric model.

Study Design Ovine tibias (40 bones) were mounted on a custom-made securement device and radiopaque markers were placed to aid radiographic measurements. A standard TPLO procedure was performed on each tibia with either a custom-made six-hole 3.5 mm angled compression hole plate (APlate) or a six-hole 3.5 mm standard commercial plate (SPlate). Radiographs were obtained before and after tightening of the cortical screws and evaluated by an observer blinded to the plate. Measurements of cranio-caudal displacement (CDisplacement), proximo-distal displacement (PDisplacement) in relation to the long axis of the tibia, and change in tibial plateau angle (TPA) were determined.

Results CDisplacement was significantly greater in APlate (median 0.85 mm, Q1-Q3: 0.575-1.325 mm) compared to SPlate (median 0.00 mm, Q1-Q3: -0.35-0.50 mm, p < 0.0001). There were no significant differences in the PDisplacement (median 0.55 mm, Q1-Q3: 0.075-1.00 mm, p = 0.5066) or TPA change (median -0.50°, Q1-Q3: -1.225-0.25°, p = 0.1846) between the two plate types.

Conclusion APlate increases cranially directed displacement of the osteotomy in a TPLO procedure without causing TPA change. The reduced interfragmentary distance across the whole osteotomy could improve osteotomy healing compared to standard commercial TPLO plates.

Keywords

Tibial plateau levelling osteotomy - Dynamic Compression Plate - Dog - Tibia

Authors' Contribution

R.C.Y.L. and D.R.J. contributed to conception of study, study design, data analysis and interpretation. J.D.W. contributed to the study design, statistical analysis and interpretation. All authors drafted, revised, and approved the submitted manuscript.




Publikationsverlauf

Eingereicht: 18. April 2022

Angenommen: 15. Dezember 2022

Artikel online veröffentlicht:
16. Februar 2023

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