Quantification of cancellous bone-compaction due to DHS® Blade insertion and influence upon cut-out resistance

Windolf, Markus; Muths, Raphael; Braunstein, Volker; Gueorguiev, Boyko; Hänni, Markus; Schwieger, Karsten

doi:10.1016/j.clinbiomech.2008.09.005

Cited by 96 publications

(78 citation statements)

References 13 publications

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“…Reconstruction nail or Gamma nail are good choices for concomitant neck and shaft of femur fracture, but not for pure femoral neck fracture. Both cannulated screw and DHS have the capacity for compression [1,18] in the fracture site but their strength for maintaining reduction is not the same. On the other hand, if cannulated screws are not inserted parallel to each other, compression cannot be achieved.…”

Section: Introductionmentioning

confidence: 99%

A comparative study between multiple cannulated screws and dynamic hip screw for fixation of femoral neck fracture in adults

Siavashi

Aalirezaei

Moosavi

et al. 2015

International Orthopaedics (SICOT)

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Section: Introductionmentioning

confidence: 99%

A comparative study between multiple cannulated screws and dynamic hip screw for fixation of femoral neck fracture in adults

Siavashi

Aalirezaei

Moosavi

et al. 2015

International Orthopaedics (SICOT)

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“…The peak level was then monotonously increased at 0.1 N/cycle until catastrophic failure of the cerclages occurred, while the valley load was maintained constant. The principle of fatigue testing with monotonically increasing load levels has been proven useful previously [7].…”

Section: Mechanical Testingmentioning

confidence: 99%

Biomechanical performance of different cable and wire cerclage configurations

Lenz

Perren

Richards

et al. 2012

International Orthopaedics (SICOT)

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Purpose Cerclage technology is regaining interest due to the increasing number of periprosthetic fractures. Different wiring techniques have been formerly proposed and have hibernated over years. Hereby, they are compared to current cerclage technology. Methods Seven groups (n06) of different cable cerclage (Ø1.7 mm, crimp closure) configurations (one single cerclage looped once around the shells, one single cerclage looped twice, two cerclages each looped once) and solid wire cerclages (Ø1.5 mm, twist closure) (same configurations as cable cerclages, and two braided wires, twisted around each other looped once) fixed two cortical half shells of human femoral shaft mounted on a testing jig. Sinusoidal cyclic loading with constantly increasing force (0.1 N/cycle) was applied starting at 50 N peak load. Cerclage pretension (P), load leading to onset of plastic deformation (D) and load at total failure (T) were identified. Statistical differences between the groups were detected by univariate ANOVA. Results Double looped cables (P442N ± 129; D1334N ± 319; T2734N ± 330) performed significantly better (p< 0.05) than single looped cables (P292N ± 56; D646N ± 108; T1622N ± 171) and were comparable to two single cables (P392N ± 154; D1191N ± 334; T2675N ± 361). Double looped wires (P335N ± 49; D752N ± 119; T1359N ± 80) were significantly better (p<0.05) than single looped wires (P181N ± 16; D343N ± 33; T606N ± 109) and performed similarly to single looped cables. Braided wires (P119N ± 26; D225N ± 55; T919N ± 197) exhibited early loss of pretension and plastic deformation. Conclusion Double looped cerclages provided a better fixation stability compared to a single looped cerclage. Double looped wires were comparable to a single looped cable. The use of braided wires could not be recommended mechanically.

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“…The peak level was then regularly increased at 0.02 N/cycle until catastrophic failure of the locking screws occurred. The principle of fatigue testing with regularly increasing load levels has been proven useful previously [16]. To provide a reasonable cycle number necessary for fatigue testing, the cyclic test was designed such that failure occurred not before 100,000 cycles in both groups.…”

Section: Mechanical Testingmentioning

confidence: 99%