scholarly journals Bioabsorbable Suture Anchor Migration to the Acromioclavicular Joint: How Far Can These Implants Go?

2014 ◽  
Vol 2014 ◽  
pp. 1-4 ◽  
Author(s):  
Giovanna Medina ◽  
Guilherme Garofo ◽  
Caio O. D’Elia ◽  
Alexandre C. Bitar ◽  
Wagner Castropil ◽  
...  
Keyword(s):  
Magnetic Resonance Imaging ◽  
Magnetic Resonance ◽  
Magnetic Resonance Image ◽  
Bone Repair ◽  
Acromioclavicular Joint ◽  
Suture Anchor ◽  
Suture Anchors ◽  
Resonance Imaging ◽  
Metallic Implants ◽  
Over Time

Few complications regarding the use of bioabsorbable suture anchors in the shoulder have been reported. What motivated this case report was the unusual location of the anchor, found in the acromioclavicular joint which, to our knowledge, has never been reported so far. A 53-year old male with previous rotator cuff (RC) repair using bioabsorbable suture anchors presented with pain and weakness after 2 years of surgery. A suspicion of retear of the RC led to request of a magnetic resonance image, in which the implant was found located in the acromioclavicular joint. The complications reported with the use of metallic implants around the shoulder led to the development of bioabsorbable anchors. Advantages are their absorption over time, minimizing the risk of migration or interference with revision surgery, less artifacts with magnetic resonance imaging, and tendon-to-bone repair strength similar to metallic anchors. Since the use of bioabsorbable suture anchors is increasing, it is important to know the possible complications associated with these devices.

Orthosorb resorption evaluation using MRI and histologic analysis

1994 ◽  
Vol 84 (1) ◽  
pp. 10-13 ◽  
Author(s):  
ME Bashara ◽  
MR Mourino ◽  
MJ Trepal ◽  
WC Lambert
Keyword(s):  
Magnetic Resonance Imaging ◽  
Animal Model ◽  
Magnetic Resonance ◽  
Surgical Procedures ◽  
Magnetic Resonance Image ◽  
Resonance Imaging ◽  
Bone Fixation ◽  
Radiographic Technique ◽  
Fixation Devices ◽  
Over Time

Resorbable bone fixation devices may be used in various surgical procedures for internal fixation in place of traditional metallic devices. Currently, there is no radiographic technique for tracing the postsurgical location and resorption of these devices. This study was undertaken to ascertain whether magnetic resonance imaging is a suitable tool for performing such evaluations. Using an animal model, the authors investigated the correlation over time between the magnetic resonance image of a surgically implanted pin and its histologically verified location and state.

Contrast magnetic resonance imaging for measurement of cartilage glycosaminoglycan content in dogs: A pilot study

2013 ◽  
Vol 26 (02) ◽  
pp. 100-104 ◽  
Author(s):  
M. C. Stewart ◽  
L. Ciobanu ◽  
P. D. Constable ◽  
J. F. Naughton
Keyword(s):  
Magnetic Resonance Imaging ◽  
Magnetic Resonance ◽  
Coefficient Of Variation ◽  
Signal Intensity ◽  
Linear Regression Analysis ◽  
Resonance Imaging ◽  
Post Contrast ◽  
Enhanced Mri ◽  
Over Time

SummaryObjective: To assess the ability of a contrast-enhanced magnetic resonance imaging (MRI) technique to quantitatively determine glycosaminoglycan content in canine articular cartilage.Methods: Fifty-four full-thickness cartilage discs were collected from the femorotibial and scapulohumeral joints of three adult dogs immediately following euthanasia. One set of discs from each dog was analysed for glycosaminoglycan content using a colourimetric laboratory assay. The remaining position-matched set of discs from contralateral limbs underwent pre- and post-contrast gadolinium-enhanced MRI, using repeated saturation recovery pulse sequences which were used to generate calculated T1 maps of the cartilage discs. Linear regression analysis was then performed relating delayed gadolinium-enhanced MRI T1 calculated signal intensity to the cartilage glycosaminoglycan content normalized to DNA content. Repeatability of triplicate measurements was estimated by calculating the coefficient of variation.Results: Mean coefficient of variation estimates for the gadolinium-enhanced MRI T1 signal intensity values for nine sampling sites from three dogs ranged from 5.9% to 7.5%. Gadolinium-enhanced MRI T1 signal intensity was significantly correlated (p <0.05) with normalized glycosaminoglycan content in two dogs (r = 0.79, p = 0.011; r = 0.78, p = 0.048), but not in the third dog (r = 0.53, p = 0.071).Clinical significance: Gadolinium-enhanced MRI assessment of cartilage may be predictive of glycosaminoglycan content and therefore offer an in vivo assessment of changes in cartilage characteristics over time. Additional studies appear indicated to determine the reliability and clinical applicability of gadolinium-enhanced MRI in detecting changes in cartilage over time.

Benefits of magnetic resonance image scanning in progressive, bilateral, sensorineural hearing loss: a case of leptomeningeal haemosiderosis

2009 ◽  
Vol 123 (11) ◽  
pp. 1266-1270 ◽  
Author(s):  
A Muthu ◽  
S Stevenson ◽  
P Bird
Keyword(s):  
Magnetic Resonance Imaging ◽  
Hearing Loss ◽  
Magnetic Resonance ◽  
Sensorineural Hearing Loss ◽  
Magnetic Resonance Image ◽  
Sensorineural Hearing ◽  
Resonance Imaging ◽  
Irreversible Damage ◽  
Image Scanning ◽  
Bilateral Sensorineural Hearing Loss

AbstractObjective:Magnetic resonance imaging is a routine investigation in cases of asymmetric sensorineural hearing loss, but it is not routinely used to investigate bilateral sensorineural hearing loss.Method:This case report illustrates the benefits of magnetic resonance image scanning in the latter patient group.Results:A 53-year-old man with rapidly progressive, symmetrical, bilateral, sensorineural hearing loss was found also to have anosmia, imbalance and incoordination. Magnetic resonance image scanning demonstrated leptomeningeal haemosiderosis. Progressive, bilateral, sensorineural hearing loss is the most common presentation of this condition and magnetic resonance imaging is the diagnostic investigation of choice.Conclusion:There are potential treatments for leptomeningeal haemosiderosis which prevent further irreversible damage, if a bleeding source can be found. Hearing loss may be due to cochlear or retrocochlear pathology. Cochlear implantation may be indicated.

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