Finite element analysis, mechanical assessment and material comparison of two volar slab constructs

Hamilton, Steven W.; Aboud, Hussain

doi:10.1016/j.injury.2008.09.027

Cited by 6 publications

(6 citation statements)

References 6 publications

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“…Previous investigations have suggested methods to increase the strength of wrist splints and have specifically noted the value of longitudinal splint ridging. [3][4][5] We sought to expand on and validate this work by using larger experimental groups, a greater number of tested variables, more realistic models, and more precise technique.…”

Section: Discussionmentioning

confidence: 99%

“…We also recognize that, empirically, splints are likely subjected to low-amplitude cyclic loading, rotational forces, changes in position against the skin, changes in pressure of underlying tissue, as well as changes in moisture and temperature. These conditions are difficult to simulate in the laboratory, and we therefore relied, as other authors have, [3][4][5] on load-to-failure testing as an expedient, albeit nonphysiologic way of comparing splint strength. Although the studied splints would be relatively easy to reproduce, we did Note.…”

Section: Discussionmentioning

confidence: 99%

“…We have observed, like other authors, that wrist splints may weaken with time. [2][3][4][5] Splints that initially hold the wrist in a desirable position may weaken over days, allowing the wrist to move and/or to assume an unsafe position. This process may predispose the patient to stiffness, loss of reduction, wound breakdown, pressure sores, and noncompliance with splint wear.…”

Section: Introductionmentioning

confidence: 99%

“…The placement of a longitudinal ridge in plaster splints is a simple way of increasing splint strength without using additional splint material. [2][3][4][5] Several authors have investigated modifications in splinting technique designed to increase splint durability and/or to affect efficient use of splinting materials. [3][4][5] We sought to expand on this work by using larger experimental groups, a greater number of tested variables, more realistic models, and more precise technique.…”

Section: Introductionmentioning

confidence: 99%

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Efficient Construction of Volar Wrist Splints

Meals

Castro

Moss

2016

Hand (New York, N,Y.)

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The aim was to test the null hypothesis that splint material, thickness, or longitudinal ridging does not affect the strength of a wrist splint. Ten splints were made according to each of 7 different splint designs (resulting in 7 groups of 10 splints each). All splints were the same length and were molded to approximate the contour of the volar hand, wrist, and forearm with the wrist in neutral. Three groups consisted of plaster splints of different thicknesses (8, 10, and 12 ply). Three additional groups included splints of the same thicknesses but with a longitudinal ridge. A single group was constructed from prefabricated fiberglass splinting material and did not involve a longitudinal ridge. Five splints in each group were subjected to 3-point bending mimicking flexion of the wrist and 5 were subjected to a 3-point bend mimicking wrist extension. Splints were loaded to failure using a servohydraulic load frame. Analysis of variance was used to compare splints. Among the plaster splints, more layers of material and longitudinal ridging increased splint strength. Ridged 8-ply plaster splints exceeded the strength of nonridged 10-ply plaster splints. Ridged 8-ply plaster splints were similar in strength to fiberglass splints. The 8-ply ridged plaster splints may be a lighter, effective, and cheaper alternative to more common splint designs.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Efficient Construction of Volar Wrist Splints

Meals

Castro

Moss

2016

Hand (New York, N,Y.)

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“…Taams et al [6] experimented with the use of a slab made of 30 layers of p.o.P, and reached the conclusion that despite being strong, they were equally heavy [6]. Hamilton et al and Stewart et al [7,8] have modified the shape of the volar slab by adding two longitudinal ridges along the course of the slab to it to strengthen its overall performance [7,8]. Hamilton et al reached a conclusion that the simple ridged slab is stronger than the conventional molded slab requiring a mean load to failure of 385 N in comparison to 72 N [7].…”

Section: Objectivementioning

confidence: 99%

Plaster of Paris (P.O.P): Study to Determine the Best Method of Application

Maher¹

2017

OROAJ

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Materials & MethodsUniform rectangular shaped splints were made and divided into three groups. A 15-ply splint for all groups was used with plaster width being 10 centimeter (cm). The splints in the test group were placed in the Tubigrip TM sleeve before immersing in water, while the control group was not (conventional method). In the third group, the splints were placed in standard wool bandage (Figure 1). Tap water with a temperature of 20 -25°C used to immerse the p.o.P splints in. Each splint was subjected to strength test after the splints had set. All the slabs were made by the senior author using the same left-handed model to maintain our results (Figure 2). The splints were volar splints in the intrinsic plus position. The splints were placed on a fulcrum at the part that corresponds to the wrist, and were subjected to increasing weight being applied to the tips of the splint, and its deflection measured in millimetres (mm).

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