CORAIL Cementless Fixation

CORAIL Cementless Fixation

The design of the extra medullary section improves the biomechanics of the stem. The low profile neck increases the range of motion of the stem within the cup before the neck impinges on the cup.1,2 The AMT taper (ARTICUL/EZE® Mini Taper) captures completely the femoral head reducing the potential for impingement of the cup.

The CORAIL stem has a propriety HA coating on the grit-blasted surface. The HA coated medial to lateral taper resists axial / torsional stresses and promotes osteointegration for optimum fixation.3

The design of the CORAIL stem, with its titanium alloy and its full hydroxyapatite coating ensures load transfer without abnormal peak forces3,4 and allows a very low incidence of thigh pain.3-9

CORAIL Cemented Fixation

The CORAIL Hip Stem is also available as a cemented version. The surgeon using the CORAIL Hip System has intraoperative flexibility to use the most suitable implant for the patient.

CORAIL Cemented Pre-op X-ray

Pre-operative x-ray

CORAIL Cemented Post-op X-ray

Post-operative x-ray

Following an ‘intra-capsular fracture’ this male was templated for a hydroxyapatite coated CORAIL stem.

Having prepared the femur for a CORAIL Stem, the surgical team selected the cemented option from the CORAIL Hip System. This was a more suitable implant for this patient. Both hydroxyapatite coated and cemented options share exactly the same broach envelope and instrumentation.

“The cement mantle distribution was similar for the Titan and Cemented version of the CORAIL Hip System.”

Nick Bishop, Dr MM Morlock, Ph.D.
Technical University Hamburg-Harburg, Biomechanics Section. Hamburg, Germany, Sept 2008.

“In the current FEA study, the mechanical performance of the CORAIL Hip System Cemented implant was analysed and compared to that of the Titan and CHARNLEY® implants. The simulations indicated that the mechanical performance of the CORAIL Hip System Cemented was superior to that of the Titan and CHARNLEY stems. Fewer cracks were formed in the cement mantle surrounding the Cemented version of the CORAIL Hip System during the loading history. Furthermore, the migration values for the CORAIL Hip System implant were very small (lower than 20 μm).”

Dennis Janssen, MSc, Nico Verdonschot, PhD, Radboud
University Nijmegen Medical Centre Orthopaedic Research Lab, Nijmegen, The Netherlands, Apr 2008.

References

  1. Data on file at DePuy Orthopaedics. Report DVA-106976-DVER.
  2. Fessy MH and Bonnin M. Impingement: how to avoid the risk. In: Vidalain JP, Si Selmi TA, Beverland D, Young S, Board T, Boldt J, Brumby S, editors. The Corail Hip System. A practical approach based on 25 years of experience, Springer-Verlag, Heidelberg 2011. p. 20-23
  3. Reikeras O, Gunderson R. Excellent Results of HA Coating on a Grit Blasted Stem 245 Patients Followed for 8-12 Years. Acta Orthop. Scand. 2003;74:140-145.
  4. Vidalain JP. CORAIL Stem Long-Term Results Based upon the 15-Years ARTRO Group Experience. Fifteen Years of Clinical Experience with Hydroxyapatite Coatings in Joint Arthroplasty. Ed. Springer. 2004:217-224.
  5. Hardy D, Frayssinet P, Guilhem A, Lafontaine M, Delince P. Bonding of Hydroxyapatite Coated Femoral Prostheses, J. Bone Joint Surg. 1991;73-B:732-740.
  6. Chatelet J-C. Survivorship in 120 consecutive cases at 12 years. Rev Chir Orthop Reparatrice Appar Mot. 2004;90(7):628-635.
  7. Vidalain JP. HA Coating. 10-Year Experience with the Corail System and Primary THA. Acta Orthrop Belg.1997;63 Suppl 1:93-95.
  8. Plaweski S, Merloz PH, Barth Y, Tonetti J, Faure C, Martinez T, Eid A. Cementless Femoral Stem with Uni-Polar Heads on Femoral Neck Fractures in Elderly Patients. 75th Meeting of the French Orthopeadic and Traumatologic Surgery Society. 2000;86:37-38.
  9. Froimson M, Garino J, Minimum 10-Year Results of a Tapered, Titanium, Hydroxyapatite Coated Hip Stem: An Independent Review. J. Arthroplasty. 2007;22:1-7.