Kinematics of the Wrist With a New Dynamic External Fixation Device

Goslings, J. Carel; DaSilva, Manuel F.; Viegas, S.F.; Perren, Stephan M.; Patterson, Rita M.

doi:10.1097/00003086-200105000-00030

Cited by 3 publications

(1 citation statement)

References 22 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Thus, anatomical intra-articular reduction may decrease enormously the occurrence of posttraumatic osteoarthrosis 1 and the ultimate result is legitimately identified with nature of reduction. Many methods of fixations have been portrayed including pin-plaster fixation, 2 percutaneous pinning, 3 intramedullary pinning, 4 outside fixation, 5 bridging, 6 or nonbridging 7 (static or dynamic) and different types of internal fixation [8][9][10] with modified implants. Although communited fractures commonly require aggressive treatment, the perfect management for the distal radius does not exist till now.…”

Section: Introductionmentioning

confidence: 99%

Unstable Intra-articular Fracture Distal Radius Managed by Combined External Fixation and Internal Fixation by Volar Plating

Prabhakar¹

2020

Journal of Orthopedics and Joint Surgery

View full text Add to dashboard Cite

Background: Combined external fixation and internal fixation of distal radiusfractures is used most commonly to treat injuries with joint surface ormetaphysealcomminution. External fixation aids reduction intraoperatively and facilitates percutaneous or intraoperative manipulation of fracture. Internal fixation maintains precise reduction in critical anatomy, principally the contour and orientation of the articular surface. Postoperatively, the external fixator functions as a neutralization device, preventing fracture collapse and decreasing the biomechanical demands on the internal fixation hardware. Purpose of study: The aim of this study is to see short-term functional and radiological outcome analysis in patients with unstable intraarticular distal radius fracture treated with combined external fixation and open reduction and internal fixation by volar plating. Materials and methods: A total of 25 cases of unstable intra-articular distal radius fracture (AO Type C group) were treated by combined transarticular external fixator and internal fixation by volar plating with supplementary procedures such as primary bone grafting and K-wire fixation if necessary. The abovementioned study was conducted in Government Royapettah Hospital, Chennai-14, from June 2010 to May 2012. The Modified Gartland and Werley Demerit Scoring system was used to evaluate the functional outcome. In most cases, external fixator was left for a period of 6 weeks. Results: There were 25 patients ranging from 20 to 70 years with 16 males and 9 females. The follow-up period was from 12 to 18 months. Accordingly, there were 14 (56%) excellent, 8 (32%) good, 2 (8%) fair, and 1 (4%) poor results. There were very few complications such as one malunion, two superficial radial nerve palsy, and two secondary fracture collapse noted in our series. Conclusion:We conclude that unstable intra-articular fractures of distal radius treated by combined external fixation and internal fixation by volar plating provides high rate of fracture union and high level of patient satisfaction with early return to work.

show abstract

Section: Introductionmentioning

confidence: 99%

Unstable Intra-articular Fracture Distal Radius Managed by Combined External Fixation and Internal Fixation by Volar Plating

Prabhakar¹

2020

Journal of Orthopedics and Joint Surgery

View full text Add to dashboard Cite

show abstract

Changes in Patterns of Scaphoid and Lunate Motion During Functional Arcs of Wrist Motion Induced by Ligament Division

Werner

Short

Green

2005

The Journal of Hand Surgery

View full text Add to dashboard Cite

Purpose: To determine the in vitro motion of the scaphoid and lunate during wrist circumduction and wrist dart-throw motions and to see how these motions change after the ligamentous stabilizers of the scaphoid and lunate are sectioned in a manner simulating scapholunate instability.Methods: Twenty-one fresh-frozen cadaver forearms were moved through a dart-throw motion and a circumduction motion using a wrist joint simulator. Scaphoid and lunate motion were measured with the wrist ligaments intact and after sectioning of the scapholunate interosseous ligament, the scaphotrapezium ligament, and the radioscaphocapitate ligament. Results:In the intact wrist the scaphoid and lunate moved more during circumduction than during the dart-throw motion. With ligamentous sectioning the scaphoid flexed more and the lunate extended more during both the circumduction and dart-throw motions. During the circumduction motion both before and after sectioning the global motion of the scaphoid was greater than that of the lunate. After sectioning the scaphoid motion increased and the lunate motion decreased. Conclusions:The scaphoid and lunate motions were observed to change remarkably after ligamentous sectioning. The observed changes in carpal motion correlate with the clinical observation that after ligamentous injury arthritic changes occur in the radioscaphoid joint and not in the radiolunate joint. Analysis of the injured wrist in positions that combine flexion-extension and radialulnar deviation may allow noninvasive diagnosis of specific wrist ligament injuries. KeywordsCarpal motion; wrist circumduction motion; wrist dart-throw motion; kinematics; scapholunate interosseous ligament; scaphoid; lunate Many activities involving the wrist are motions that require a combination of wrist flexionextension and radial-ulnar deviation. These motions frequently include a dart-throw type of motion. 1 Although the in vivo and in vitro motions of the wrist carpal bones during planar wrist flexion-extension and planar wrist radial-ulnar deviation have been studied, 2 − 13 a dart-throw motion only now is being studied in an organized biomechanical fashion. 14 − 16 For this study we chose to study a dart-throw motion with a limited (20° total) radial-ulnar deviation motion, which may not be indicative of the motion used in throwing a ball or other activities with extreme ranges of motion. In some activities such as stirring a bowl, wrist circumduction is the primary motion. The purpose of this study was to determine the in vitro motion of the scaphoid and lunate during these functional arcs of wrist motion. A second purpose was to see how these motions change after the ligamentous stabilizers of the scaphoid and lunate are sectioned in a manner simulating scapholunate instability. MethodsA wrist-joint motion simulator 17 was used to move 21 fresh-frozen cadaver wrists through cyclic dart-throw and cyclic circumduction motions. The average age of the specimens was 67 years (range, 31−87 y) and there were 11 male and 10 female speci...

show abstract