Correction of Forearm Malunion Guided by the Preoperative Complaint

Nagy, Ladislav; Jankauskas, Linas; Dumont, Charles E.

doi:10.1007/s11999-008-0234-3

Cited by 73 publications

(96 citation statements)

References 35 publications

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“…This allowed the quantification of the malunion in all three axes. The preoperative planning was based on this information where both angular deformities were transformed to the true plane deformity angle [17] and its axial orientation.…”

Section: Discussionmentioning

confidence: 99%

“…The mainstay of therapy is corrective osteotomy to restore normal anatomy [3,14,17,24], thus improving the range of motion (ROM) and decreasing pain. Angular deformities are well visible on plain radiographs and allow an appropriate operative planning.…”

Section: Introductionmentioning

confidence: 99%

“…Angular deformities are well visible on plain radiographs and allow an appropriate operative planning. Anatomical landmarks, radiographs from the uninvolved opposite side and intraoperative image intensifier are used as a guide for planning, intraoperative orientation and control of the result [14,17,19,25]. However, the rotational component of a malunion is almost undetectable on plain radiographs [5][6][7]23] and requires a more sophisticated side-to-side comparison of bony rotation profiles on computed tomography (CT) images [2,6].…”

Section: Introductionmentioning

confidence: 99%

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Complex Radius Shaft Malunion: Osteotomy with Computer-Assisted Planning

Schweizer

Fürnstahl

Harders

et al. 2010

Hand (New York, N,Y.)

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We report about two cases with a combined axial and angular malunion of the radius shaft with functional loss of pro-supination. For the preoperative planning, a computer simulation was developed that allows the quantification of the malunion by comparing the 3-d surface model of the impaired bone with the contralateral anatomy. The proximal parts of the left and right radii are superimposed, while the different positions of the distal parts are used to quantify the malunion. This task is performed fully automatically which reduces the overall planning time. The osteotomies were performed according to the results of the computer-aided planning. The first case showed 1 year postoperatively an increase of pronation from 40°to 70°at expense of supination from 95°to 90°. The patient was practically pain-free and reported functional improvement. The second case showed 6 months postoperatively an improvement of supination from 15°to 40°and of pronation from 50°to 60°. The computer-assisted operation planning facilitated the quantification of combined axial and angular malunions which were difficult to detect on plain radiographs.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Complex Radius Shaft Malunion: Osteotomy with Computer-Assisted Planning

Schweizer

Fürnstahl

Harders

et al. 2010

Hand (New York, N,Y.)

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“…This results in an impairment of the forearm range of motion (ROM) or pain in the distal radioulnar joint (DRUJ) [1]. Corrective osteotomy is the preferred treatment to improve the overall ROM and to alleviate pain.…”

Section: Introductionmentioning

confidence: 99%

“…However, important side to side variabilities exist in the healthy population [2], [3]. In order to improve the reliability and outcome of this surgical intervention, computer-based planning, independent of the healthy side, is of great clinical interest [1]. Therefore, the goal of our current research is to develop a planning system to virtually assess the outcome of surgical corrections and to simulate the resultant ROM.…”

Section: Introductionmentioning

confidence: 99%

A morphological approach to the simulation of forearm motion

Fürnstahl

Schweizer

Nagy

et al. 2009

2009 Annual International Conference of the IEEE Engineering in Medicine and Biology Society

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Computer-based simulations support surgeons in preoperative planning of osteotomy and assessing the improvement of the forearm motion. To this end, an in-silico model of patient-specific forearm kinematics is required. In this paper we introduce a motion model of the forearm which is based on a patient's joint morphology, the form and shape of the joints. The morphology of the articulations is represented by 3-dimensional splines. In this way the gliding motion of the articulations is expressed analytically in a closed-form. Our algorithm was designed to work with available clinical planning data and requires minimal user interaction. This allows an integration in computer-aided planning systems that are operated by surgeons. The accuracy of the simulation results is verified via cadaver experiments. Abstract-Computer-based simulations support surgeons in preoperative planning of osteotomy and assessing the improvement of the forearm motion. To this end, an in-silico model of patient-specific forearm kinematics is required. In this paper we introduce a motion model of the forearm which is based on a patient's joint morphology, the form and shape of the joints. The morphology of the articulations is represented by 3-dimensional splines. In this way the gliding motion of the articulations is expressed analytically in a closed-form. Our algorithm was designed to work with available clinical planning data and requires minimal user interaction. This allows an integration in computer-aided planning systems that are operated by surgeons. The accuracy of the simulation results is verified via cadaver experiments. A Morphological Approach to the Simulation of Forearm Motion

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Mechanistic Insights into CN Coupling Catalyzed by 1,3‐Diketonate‐Ligated Copper: Unprecedented Activation of Aryl Iodide

et al. 2010

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The mechanism of CN cross‐coupling reactions catalyzed by CuI associated to a 1,3‐diketonate ligand L− is investigated by cyclic voltammetry and 1H NMR spectroscopy up to the formation of the key anionic complex [LCuINHCy]−. Its reaction with PhI, shown experimentally, proceeds via an unusual iodide activation, and the transition states are investigated by density functional calculations.

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Correction of Forearm Malunion Guided by the Preoperative Complaint

Abstract: Diaphyseal

Cited by 73 publications

References 35 publications

Complex Radius Shaft Malunion: Osteotomy with Computer-Assisted Planning

Complex Radius Shaft Malunion: Osteotomy with Computer-Assisted Planning

A morphological approach to the simulation of forearm motion

Mechanistic Insights into CN Coupling Catalyzed by 1,3‐Diketonate‐Ligated Copper: Unprecedented Activation of Aryl Iodide

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