Assessment of patient-specific instrumentation precision through bone resection measurements

Purpose In the present study, the precision of two patient-specific instrumentation (PSI) systems for total knee arthroplasty (TKA) was evaluated by comparing bony resection thicknesses of the pre-operative PSI planning and intra-operative measurements by a vernier calliper. It was hypothesized that...

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Bibliographic Details
Published in:Knee surgery, sports traumatology, arthroscopy : official journal of the ESSKA sports traumatology, arthroscopy : official journal of the ESSKA, 2017-09, Vol.25 (9), p.2841-2848
Main Authors: Zambianchi, F., Colombelli, A., Digennaro, V., Marcovigi, A., Mugnai, R., Fiacchi, F., Sandoni, D., Belluati, A., Catani, F.
Format: Article
Language:English
Subjects:
Aged
Arthroplasty (knee)
Arthroplasty, Replacement, Knee - methods
Arthroplasty, Replacement, Knee - standards
Biomedical materials
Female
Femur
Femur - anatomy & histology
Femur - surgery
Humans
Instrumentation
Instruments
Jigs
Joint surgery
Knee
Knee Prosthesis
Male
Measurement methods
Medicine
Medicine & Public Health
Orthopedics
Patient assessment
Placement
Planes
Prostheses
Surgery, Computer-Assisted - methods
Surgical implants
Thickness measurement
Tibia - anatomy & histology
Tibia - surgery
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Summary:Purpose In the present study, the precision of two patient-specific instrumentation (PSI) systems for total knee arthroplasty (TKA) was evaluated by comparing bony resection thicknesses of the pre-operative PSI planning and intra-operative measurements by a vernier calliper. It was hypothesized that the data provided by pre-operative planning were accurate within ±2 mm of the bone resection thickness measured intra-operatively. Methods Forty-one patient-specific TKAs were examined: 25 performed with Visionaire ® technology and 16 with OtisMed ® system. PSI accuracy was analysed comparing the resected bone thicknesses in the femoral and tibial cuts with pre-operatively planned resections. To determine pre-operative planning precision, the thickness values reported by the PSI planning were subtracted from the values reported intra-operatively by the calliper. Results The mean absolute differences between pre-operatively planned resections and corresponding intra-operative thickness measurements ranged from a minimum of 2.6 mm (SD 0.8) to a maximum of 3.6 mm (SD 1.3) in all three anatomical planes in both groups. In every plane, the mean absolute discrepancies between planned resections and measured cuts differed significantly from zero ( p  
ISSN:0942-2056
1433-7347
DOI:10.1007/s00167-015-3949-1