The ESOP (ATLAS) design was born in 1985 of Dr Alain Dambreville’s observations. The ESOP (ATLAS) is a cementless elastic cup that has been in clinical use for more than 30 years.

Product line

The ESOP (ATLAS) elastic cup product line has various models of metal-back shell, with and without spikes, with and without holes, in a range of diameters from 46 mm to 74 mm (2-mm increments).

The ESOP (ATLAS) metal-back shell product line is complemented by a comprehensive range of highly cross-linked polyethylene (TRIANON) or conventional polyethylene liners in various inner diameters (28, 32, 36 mm) and various shapes (flat rim, posterior wall, anti-dislocation rim).

Features and materials

The 3 types of ESOP (ATLAS) metal-back shells are manufactured from titanium alloy (TA6V4 ELI) in a uniform 2.5-mm thickness and are hydroxyapatite-coated.

The ESOP (ATLAS) IIIP has 4 spikes that penetrate the patient’s bone and has 3 screw holes.

The ESOP (ATLAS) IVP has spikes but no screw holes.

The ESOP (ATLAS) MS has no spikes. Like the ESOP (ATLAS) IIIP, it has 3 screw holes. Instead of spikes, it has a rougher surface finish achieved by spraying porous T40 titanium underlay before being HA-coated.

The standard inserts are made of UHMWPE.

The highly cross-linked polyethylene liners, called TRIANON are available in
– a 28-mm diameter for the 46 to 64 mm cup sizes
– a 32-mm diameter for the 50 mm to 64 mm cup sizes
– a 36-mm diameter for the 54 mm to 64 mm cup sizes.


The ESOP (ATLAS) instrumentation is the same one used with other FH ORTHOPEDICS acetabular cups. This instrumentation can be used with all the standard surgical approaches, including minimally invasive ones. It is supplemented by optional retractor trays.


  1. Lee, P.Y., et al., Long-term results with the Atlas IIIP elastic cementless acetabular component in total hip replacement. Int Orthop, 2016.
  2. Philippe, M. and M. Ameil, Survival analysis at 10 years of a cohort of 297 atlas total hip prostheses. European Journal of Orthopaedic Surgery & Traumatology, 2007. 17(6): p. 573- 578.
  3. Dambreville, A., Minimum Ten-Year Follow-up of the Hydroxyapatite-Coated Atlas Cup, in Fifteen Years of Clinical Experience with Hydroxyapatite Coatings in Joint Arthroplasty. 2004, Springer Paris: Paris. p. 325-328.
  4. Dambreville, A., Assessing the stability of metal back acetabular inserts. A microscopic study of explants. European Journal of Orthopaedic Surgery & Traumatology, 2001. 11(4): p. 213-218.
  5. Dambreville, A. and J. Hummer, Friction couples and total hip prostheses. European Journal of Orthopaedic Surgery & Traumatology, 1999. 9(4): p. 237-240.
  6. Dambreville, A., Le cotyle ATLAS. Orthopédie Traumatologie, 1992. 2(2): p. 111-114.