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About this product

Division: Hip Reconstruction
Category: Primary Femoral Stems

Titanium tapered stems have been clinically established in cementless total hip arthroplasty for many years. The SUMMIT Tapered Hip System is an advanced version of the tapered stem geometry philosophy. It was designed and launched in 2001. Its fixation is the foundation of long-term clinical success3, a biocompatible titanium alloy, combined with POROCOAT Porous Coating and underlying radial ZTT™ macro texture, creates a surface that enhances initial stability and biologic in-growth.3,7

The SUMMIT stem is also available with DUOFIX HA coating, which combines the clinically proven fixation of POROCOAT Porous Coating with the potential benefits of hydroxyapatite (HA) coating 8,9,10.


DYN: Resources


Features & Benefits


Features Benefits
POROCOAT Porous Coating has over 30 years Clinical Heritage
  • Clinical proven press-fit value and optimum pore size for bony in-growth providing long term stability 8,9
  • Porous surface area extends to the metaphyseal/diaphyseal junction
DUOFIX ( combination of POROCOAT Porous Coating and Hydroxyapatite)
  • Proprietary application of HA coating over proven Porocoat porous coating1,2
  • Potential for rapid osteointegration and long term fixation
Radial ZTT Steps
  • Designed to convert hoop stresses to compression loads with evidence of good clinical performance 3
  • Reduced risk of intra-operative fracture 4
Direct Lateralization
  • Enables femoral offset restoration without affecting leg length
  • Offset options to help surgeons more effectively manage soft tissue laxity
Neck Design
  • Neck geometry designed to decrease the risk of dislocation due to impingement and increase range of motion 5,6


1. Engh CA, et al. Cementless total hip arthroplasty using the anatomic medullary locking stem: 0-10 year results using a survivorship analysis. Clinical Orthopaedics and Related Research 1989:249: 141-158
2. Pilliar RM. Powder metal-made orthopaedic implants with porous surface for fixation by tissue ingrowth of bone Clinical Orthopaedics and Related Research 1983:176: 42 - 51
3. Christie MJ. Et al. “Primary Total Hip Arthroplasty with Use of the Modular S-ROM Prosthesis” The Journal of Bone and Joint Surgery 1999; 81(A): 1707 - 1716
4. Currier J H., et al “In vitro Testing of the Risk of Femur Fracture During Insertion of Radial Stepped Stems and Porous Coated Stems” Poster Presentation #1841, 54th Annual Meeting of the Orthopaedic Research Society, San Francisco, CA. 2008
5. Data on file DePuy Orthopaedics, Inc., Warsaw, IN. DVA-106976
6. Hayashi S, Nishiyama T, Fujishiro T, Hashimoto S, Kanzaki N, Nishida K, Kuroda R, Kurosaka M. Excessive femoral offset does not affect the range of motion after total hip arthroplasty. International Orthopaedics. 2013; 37(7):1233-7.
7. Engh, C., et al. “Evaluation of Bone Ingrowth in Proximally and Extensively Porous-Coated Anatomic Medullary Locking Prostheses Retrieved at Autopsy.” The Journal of Bone and Joint Surgery 1995; 77A, 6: 903-910.

8. Bobyn, J. and C. Engh. “Human histology of the bone-porous metal implant interface.” Orthopedics 1984; 7: 1410-1412.

9. Bobyn, J., et al. “The optimum pore size for the fixation of porous-surfaced metal implants by the ingrowth of bone.” Clinical Orthopaedics and Related Research 1980; 150: 263-270.

10. Frayssinet, P., et al. “Natural History of Bone Response to Hydroxyapatite-Coated Hip Prostheses Implanted in Humans.” Cells and Materials Feb. 1995;2: 125-138.

Please refer to the surgical technique guide or package inserts if included for a complete list of indications, contraindications, precautions and warnings. For further information on DePuy Synthes Products, please contact your local DePuy Synthes Representative .
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