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X Demographics
Mendeley readers
Attention Score in Context
| Title |
Axial pullout strength comparison of different screw designs: fenestrated screw, dual outer diameter screw and standard pedicle screw
|
|---|---|
| Published in |
Scoliosis and Spinal Disorders, May 2015
|
| DOI | 10.1186/s13013-015-0039-6 |
| Pubmed ID | |
| Authors |
Evangelos Christodoulou, Suresh Chinthakunta, Divya Reddy, Saif Khalil, Thomas Apostolou, Philipp Drees, Konstantinos Kafchitsas |
| Abstract |
The pullout strength of pedicle screws is influenced by many factors, including diameter of the screws, implant design, and augmentation with bone cement such as PMMA. In the present study, the pullout strength of an innovative fenestrated screw augmented with PMMA was investigated and was compared to unaugmented fenestrated, standard and dual outer diameter screw. Twenty four thoracolumbar vertebrae (T10-L5, age 60 to 70 years) from three cadavers were implanted with the four different pedicle screws. Twelve screws of each type were instrumented into either left or right pedicle with standard screw paired with unaugmented and dual outer diameter screw paired with augmented fenestrated screw in any given vertebra. Axial pullout testing was conducted at a rate of 5 mm/min. Force to failure (Newtons) for each pedicle screw was recorded. The augmented fenestrated screws had the highest pullout strength, which represented an average increase of 149%, 141%, and 78% in comparison to unaugmented, standard, and dual outer diameter screws, respectively. Pullout strength of unaugmented screws was comparable to that of standard screws, however it was significantly lower than dual outer diameter screws. Fenestrated screws augmented with PMMA improve the fixation strength and result in significantly higher pullout strength compared to dual outer diameter, standard and unaugmented fenestrated screws. Screws with dual outer diameter provided enhanced bone-screw purchase and may be considered as an alternative technique to increase the bone-screw interface in cases where augmentation using bone cement is not feasible. Unaugmented screws can be left in the pedicle even without cement and provide similar pullout strength to standard screws. |
X Demographics
The data shown below were collected from the profile of 1 X user who shared this research output. Click here to find out more about how the information was compiled.
Geographical breakdown
| Country | Count | As % |
|---|---|---|
| Unknown | 1 | 100% |
Demographic breakdown
| Type | Count | As % |
|---|---|---|
| Members of the public | 1 | 100% |
Mendeley readers
The data shown below were compiled from readership statistics for 60 Mendeley readers of this research output. Click here to see the associated Mendeley record.
Geographical breakdown
| Country | Count | As % |
|---|---|---|
| Italy | 1 | 2% |
| Unknown | 59 | 98% |
Demographic breakdown
| Readers by professional status | Count | As % |
|---|---|---|
| Researcher | 16 | 27% |
| Student > Bachelor | 8 | 13% |
| Student > Doctoral Student | 7 | 12% |
| Other | 6 | 10% |
| Student > Master | 4 | 7% |
| Other | 11 | 18% |
| Unknown | 8 | 13% |
| Readers by discipline | Count | As % |
|---|---|---|
| Engineering | 19 | 32% |
| Medicine and Dentistry | 18 | 30% |
| Agricultural and Biological Sciences | 3 | 5% |
| Materials Science | 3 | 5% |
| Neuroscience | 2 | 3% |
| Other | 3 | 5% |
| Unknown | 12 | 20% |
Attention Score in Context
This research output has an Altmetric Attention Score of 5. This is our high-level measure of the quality and quantity of online attention that it has received. This Attention Score, as well as the ranking and number of research outputs shown below, was calculated when the research output was last mentioned on 23 February 2022.
All research outputs
#7,212,870
of 25,394,764 outputs
Outputs from Scoliosis and Spinal Disorders
#63
of 320 outputs
Outputs of similar age
#79,877
of 279,009 outputs
Outputs of similar age from Scoliosis and Spinal Disorders
#4
of 10 outputs
Altmetric has tracked 25,394,764 research outputs across all sources so far. This one has received more attention than most of these and is in the 71st percentile.
So far Altmetric has tracked 320 research outputs from this source. They typically receive a little more attention than average, with a mean Attention Score of 6.5. This one has done well, scoring higher than 79% of its peers.
Older research outputs will score higher simply because they've had more time to accumulate mentions. To account for age we can compare this Altmetric Attention Score to the 279,009 tracked outputs that were published within six weeks on either side of this one in any source. This one has gotten more attention than average, scoring higher than 70% of its contemporaries.
We're also able to compare this research output to 10 others from the same source and published within six weeks on either side of this one. This one has scored higher than 6 of them.