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Search: authors:"J. G. G. Dobbe"

8 papers found.
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Positioning error of custom 3D-printed surgical guides for the radius: influence of fitting location and guide design

Purpose Utilization of 3D-printed patient-specific surgical guides is a promising navigation approach for orthopedic surgery. However, navigation errors can arise if the guide is not correctly positioned at the planned bone location, compromising the surgical outcome. Quantitative measurements of guide positioning errors are rarely reported and have never been related to guide...

Predicted osteotomy planes are accurate when using patient-specific instrumentation for total knee arthroplasty in cadavers: a descriptive analysis

Purpose Malalignment of implants is a major source of failure during total knee arthroplasty. To achieve more accurate 3D planning and execution of the osteotomy cuts during surgery, the Signature (Biomet, Warsaw) patient-specific instrumentation (PSI) was used to produce pin guides for the positioning of the osteotomy blocks by means of computer-aided manufacture based on CT...

Accuracy in identifying the elbow rotation axis on simulated fluoroscopic images using a new anatomical landmark

External fixation of the elbow requires identification of the elbow rotation axis, but the accuracy of traditional landmarks (capitellum and trochlea) on fluoroscopy is limited. The relative distance (RD) of the humerus may be helpful as additional landmark. The first aim of this study was to determine the optimal RD that corresponds to an on-axis lateral image of the elbow. The...

Computer-assisted oblique single-cut rotation osteotomy to reduce a multidirectional tibia deformity: case report

The correction of multiplanar deformity is challenging. We describe preoperative 3-D planning and treatment of a complex tibia malunion using an oblique single-cut rotation osteotomy to correct deformity parameters in the sagittal, coronal and transverse plane. At 5 years postoperatively, the patient ambulates without pain with a well-aligned leg.

Patient-specific distal radius locking plate for fixation and accurate 3D positioning in corrective osteotomy

, University of Amsterdam , Amsterdam, The Netherlands 1 J. G. G. Dobbe (&) G. J. Streekstra Medical Imaging Section, Department of Biomedical Engineering and Physics, Academic Medical Center, University of

Computer-assisted 3D planned corrective osteotomies in eight malunited radius fractures

In corrective osteotomy of the radius, detailed preoperative planning is essential to optimising functional outcome. However, complex malunions are not completely addressed with conventional preoperative planning. Computer-assisted preoperative planning may optimise the results of corrective osteotomy of the radius. We analysed the pre- and postoperative radiological result of...

Computer-assisted and patient-specific 3-D planning and evaluation of a single-cut rotational osteotomy for complex long-bone deformities

of Amsterdam , Amsterdam, The Netherlands 1 J. G. G. Dobbe (&) G. J. Streekstra Department of Biomedical Engineering and Physics, Academic Medical Center, University of Amsterdam , Amsterdam, The

Measurement of functional microcirculatory geometry and velocity distributions using automated image analysis

, Amsterdam, The Netherlands 1 J. G. G. Dobbe (&) G. J. Streekstra Department of Medical Physics, Academic Medical Center, University of Amsterdam , Room no. L0-113-3, Meibergdreef 9, 1105 AZ Amsterdam, The ... Netherlands 2 J. G. G. Dobbe B. Atasever C. Ince Department of Physiology, Academic Medical Center, University of Amsterdam , Amsterdam, The Netherlands This study describes a new method for analyzing