The effects of angular and rotational deformities of both bones of the forearm. An in vitro study.

Tarr, Richard R.; Garfinkel, A I; Sarmiento, Augusto

doi:10.2106/00004623-198466010-00010

Cited by 246 publications

(161 citation statements)

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“…Conversely, isolated 20°angulation of the radius reduces pronation in dorsal angulation and supination in volar angulation, and the same angulation toward the interosseous membrane decreases supination and pronation. Combined angular deformities of the radius and ulna in different directions reduce substantially more ROM than combined angulation in the same direction [37]. Proximal deformities had less impact on ROM than equivalent deformities produced at the middle or the distal third of the radius [33].…”

Section: Discussionmentioning

confidence: 95%

“…Proximal deformities had less impact on ROM than equivalent deformities produced at the middle or the distal third of the radius [33]. Similarly, several investigations assessed the effect of experimental axial malunions of the radius and ulna on pronation and supination [12,19,37,39]. Isolated axial malunion of the radius in supination markedly reduced pronation but did not change supination, and malunion of the radius in pronation reduced supination but did not change pronation.…”

Section: Discussionmentioning

confidence: 99%

“…Numerous biomechanical studies have investigated the effects of angular and axial malunions of the forearm bones on limitation of ROM and DRUJ instability [3,4,6,8,12,19,20,24,25,31,33,37]. Different isolated or combined axial malunions of the radius and ulna may result in comparable forearm stiffness [12].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Correction of Forearm Malunion Guided by the Preoperative Complaint

Nagy

Jankauskas

Dumont

2008

Clinical Orthopaedics &Amp; Related Research

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Section: Discussionmentioning

confidence: 95%

Section: Discussionmentioning

confidence: 99%

See 1 more Smart Citation

Correction of Forearm Malunion Guided by the Preoperative Complaint

Nagy

Jankauskas

Dumont

2008

Clinical Orthopaedics &Amp; Related Research

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“…Particularly, the determination of the rotational component of the malunion is difficult since only few and less prominent bony landmarks are present which may additionally have a high side-to-side variability [5,6,23]. Currently, the most accurate way to determine rotational malunion solely based on CT images is the method described by Bindra et al [2] where only two axial CT images, one of the region of the bicipital tuberosity and one of the distal radius, are compared by applying lines onto bony edges and planes.…”

Section: Discussionmentioning

confidence: 99%

“…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]. These methods assess rotational malunions based on few anatomical landmarks on 2-dimensional planes (2-d CT slices) in spite of the 3-d nature of the available data.…”

Section: Introductionmentioning

confidence: 99%

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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Angular deformities and forearm function

Sarmiento

Ebramzadeh

Brys

et al. 1992

Journal Orthopaedic Research

106

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Angular deformities were created in cadaver forearms at proximal, middle, and distal third levels of the radius and ulna separately, and at middle and distal third levels of both bones, to determine the corresponding limitations of pronation and supination. The ranges of pronation and supination were recorded using a rotational motion measurement apparatus instrumented with a 360 degrees goniometer. These experimental results were compared to data obtained from clinical and radiographic examination of 105 patients with similar residual deformities following treatment of fractures by nonsurgical means, to evaluate the accuracy of the experimental model and to determine if loss of rotational motion could be predicted based on radiographic findings. With cadaver forearms, on the average, angulation of 10 degrees of the radius or ulna in coronal or sagittal planes limited pronation and supination by less than 24 degrees, whereas angulation of 10 degrees of both the radius and the ulna limited pronation and supination by less than 18%. Comparison of experimental results with clinical findings showed that, despite the errors involved in measuring forearm deformities in patients using biplanar radiographs, the experimental results predicted the clinical loss of pronation and supination to within 17% for the fractures of the radius, and within 8% accuracy for the fractures of the ulna.

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The effects of angular and rotational deformities of both bones of the forearm. An in vitro study.

Cited by 246 publications

References 0 publications

Correction of Forearm Malunion Guided by the Preoperative Complaint

Correction of Forearm Malunion Guided by the Preoperative Complaint

Complex Radius Shaft Malunion: Osteotomy with Computer-Assisted Planning

Angular deformities and forearm function

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