TITLE

The Effects of Ulnar Axial Malalignment on Supination and Pronation

AUTHOR(S)
Tynan, Martin C.; Fornalski, Stefan; McMahon, Patrick J.; Utkan, Ali; Green, Stuart A.; Lee, Thay Q.
PUB. DATE
December 2000
SOURCE
Journal of Bone & Joint Surgery, American Volume;Dec2000, Vol. 82-A Issue 12, p1726
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
Background: Forearm fractures are common injuries in both adults and children. Despite efforts to obtain anatomical alignment, axial rotational malunions occur, resulting in a decreased range of motion and a poor appearance. The objective of this study was to quantify loss of forearm rotation after simulation of ulnar malunions in supination and pronation. Methods: Six fresh-frozen cadaveric upper extremities (mean age at the time of death, 79.4 ± 2.8 years) were used to quantify loss of forearm rotation after simulation of axial rotational malunions of the ulna. First, maximum forearm rotation in supination and pronation was measured at torques of 6.8, 13.6, and 20.4 kilograms-centimeter applied with use of a custom jig. Following a midshaft ulnar osteotomy, a custom adjustable internal fixation plate was used to simulate axial rotational malunions of the ulna of 0, 15, 30, and 45 degrees in both directions. Measurements in supination and pronation were then repeated at the prespecified torques. Analysis of variance, with a p value of 0.05, was used for statistical analysis. Results: In all instances, a decrease in forearm rotation after simulation of the ulnar rotational malunion was accompanied by an increase in rotation in the opposite direction. Supination and pronation were significantly influenced, whereas the total arc of rotation was not affected by ulnar rotational malunion. At a torque of 20.4 kilograms-centimeter, pronation malunions of 15, 30, and 45 degrees resulted in a mean loss of supination (and standard error of the mean) of 5 ± 1,11 ± 1, and 20 ± 1 degrees, respectively, and supination maiunions of 15, 30, and 45 degrees resulted in a mean loss of pronation of 4 ± 1,10 ± 2, and 18 ± 4 degrees, respectively. The ratio of the simulated rotational malunion to the loss of motion was larger than one. Conclusions: Ulnar rotational malunions do not lead to a significant change in the total arc of...
ACCESSION #
5982977

 

Related Articles

  • The Effect of Fracture of Ulnar Styloid on Rotational Movements of the Forearm after Extraarticular Fractures of Distal Radius. Karbalaeikhani, Ali; Saied, Alireza; Sadeghifar, Amirreza // Surgical Science;Jun2011, Vol. 2 Issue 4, p215 

    Introduction: Since distal radius fractures are among the most common fractures encountered in orthopedics and one of their common complications is restriction of rotational movements of the wrist and forearm, identification of factors affecting this loss of motion is of importance. This study...

  • radius. Peters, Michael // BMA A-Z Family Medical Encyclopedia;2004, p648 

    An encyclopedia entry for "radius" is presented. It refers to the shorter of the two long bones found in the forearm. It is noted that the radius is the bone in the thumb side of the arm while the other is the ulna. It is asserted that fractures usually affect the radius because it is subjected...

  • Segmental Radius and Ulna Fracture with Epiphyseal Involvement. Grainger, Joe; Oliva, Francesco; Maffulli, Nicola // Bulletin of the NYU Hospital for Joint Diseases;2005, Vol. 62 Issue 3/4, p131 

    Segmental fractures of the radius and ulna are relatively common in adults, often occurring after high energy trauma. Segmental forearm fractures in children have not previously been reported, and their optimal management is unclear. We report a child of eight years of age who underwent fixation...

  • Isolated type IIIA fracture of the coronoid process of ulna: A case report and brief review of literature. Vishwanath, Jashan; Agarwal, Ayush; Mehtani, Anil; Kapoor, Sudhir K. // Archives of Orthopaedic & Trauma Surgery;Mar2002, Vol. 122 Issue 3, p184 

    A very rare, Regan and Morrey's type IIIA fracture of the coronoid process of ulna is presented and discussed with a review of the literature. The operative approach to be used is emphasised. Open reduction and internal fixation render the elbow stable, and a good range of motion can be achieved...

  • ulna.  // Taber's Cyclopedic Medical Dictionary (2009);2009, Issue 21, p2399 

    An encyclopedia entry for "ulna," which refers to the larger bone of the forearm, between the wrist and the elbow, on the side opposite that of the thumb, is presented.

  • Locked versus Unlocked Plating with Respect to Plate Length in an Ulna Fracture Model. Weiss, David B.; Kaar, Scott G.; Frankenburg, Elizabeth P.; Karunakar, Madhav A. // Bulletin of the NYU Hospital for Joint Diseases;2008, Vol. 66 Issue 1, p5 

    Objective: Determine contributions of plate length and locked fixation in an ulna fracture. Methods: two groups of six pairs of ulnae were plated with a small-fragment LCP around a 1 cm ostectomy. Control specimens: eight-hole plate, three consecutive unlocked screws on each side. Experimental...

  • Tratamiento de las seudoartrosis de antebrazo con injerto de cresta ilíaca y clavo Hunec. Arredondo-Gómez, Edgardo // Acta Ortopedica Mexicana;nov/dic2004, Vol. 18 Issue 6, p245 

    The bone losses in the forearm usually are result of injuries of high energy or to derive from complications or faults in the handling of simple fractures. A revision of patients with bone losses in forearm takes place derived from as much aseptic non-unions as infected, in which nail Hunec was...

  • Promontory of radius: a new anatomical description on the distal radius. Windisch, G.; Clement, H.; Tanzer, K.; Feigl, G.; Grechenig, W.; Anderhuber, F.; Pichler, W. // Surgical & Radiologic Anatomy;Dec2007, Vol. 29 Issue 8, p629 

    Surgical treatment of distal radius fractures with palmar plates has gained popularity as the preferred approach to achieve anatomical fracture reposition. One hundred and thirty four radii of human cadavers were examined to elucidate the anatomy of the distal radius, especially the transition...

  • Stress fracture of the ulna in a professional tennis player using a double-handed backhand stroke. Fragnière, B.; Landry, M.; Siegrist, O. // Knee Surgery, Sports Traumatology, Arthroscopy;Jul2001, Vol. 9 Issue 4, p239 

    Stress fractures of the ulna are uncommon injuries, but they have been reported in athletes from various sports. In tennis players stress fractures of the ulna are described exclusively in the nondominant forearm of athletes using a two-handed backhand stroke. We report such a case in a...

Share

Read the Article

Courtesy of THE LIBRARY OF VIRGINIA

Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics