Cobalt-free Modular
Double Mobility Converter


Instability is still a major challenge and a significant issue for both primary and revision total hip arthroplasties, but Double Mobility (DM) devices can provide a viable solution.[1-3]  ​To date, most of the Double Mobility Converters on the market are made of Cobalt-Chromium alloy, with several papers reporting corrosion of the taper connection.[4,5]​

Medacta’s focus on improving the patient’s well-being through innovative solutions has led to the development of the SensiTiN Double Mobility Converter, a High Nitrogen Stainless Steel completely cobalt-free modular DM device with an outer Titanium Nitride coating to improve corrosion resistance.​



Bulk material: High Nitrogen Stainless Steel​

A well-known and performing material with 50 years of successful clinical history in Double Mobility for a completely Cobalt-free device, which eliminates any potential issue coming from high Cobalt blood levels (soft tissue necrosis, osteolysis and pseudotumor formation).[6,8]​

Outer Coating: SensiTiN

A Titanium Nitride ceramic-like coating placed on the converter’s taper, acting as an electrochemical barrier between the DM Converter and the acetabular shell to lower corrosion phenomena.[9]​

The 5° raise to provide 185° of liner coverage, further increasing the Jumping Distance, thus reducing the risk of luxation.[9]​

5° raise is based on the successful experience with Versafitcup DM and Mpact DM.​

SensiTiN DM Converter has been optimized to be fully compatible with all of the Medacta fixed-bearing acetabular cups, further enriching the current Medacta Personalized Medicine offering. SensiTiN DM Converter further expands the current Medacta Double Mobility portfolio, creating a COMPLETELY COBALT-FREE DM SYSTEM.​

With SensiTiN DM Converter the surgeon can select the right implant for each specific patient, safely addressing instability and risk of dislocation in a wide range of patients, from primary to revision.​



Effective locking system of the SensiTiN DM Converter liner to minimize micromotions at the shell-converter interface[9], featuring:​

•  18° taper, clinically and mechanically proven connection system widely and successfully used on the market​

•  Micro-threads on the tapered surface to further increase converter stability within the shell


SensiTiN DM Converter further expands the current Medacta Double Mobility portfolio, creating a​


to safely address instability and risk of dislocation in a wide range of patients, from primary to revision.​


Versafitcup CC TRIO Family
Elliptic cementless cup with SensiTiN DM Converter

Mpact System
Hemispherical cementless cup with SensiTiN DM Converter

Mpact 3D Metal
Hemispherical cementless cup with SensiTiN DM Converter

Iliac Mpact 3D Metal
Iliac fixation acetabular cup

Versafitcup DM
Elliptic cementless DM cup

Elliptic cemented DM cup

Mpact DM​
Hemispherical cementless DM cup

[2] F. Farizon, R. de Lavison, J. J. Azoulai, G. Bousquet. Results with a cementless alumina coated cup with a dual mobility: a twelve years follow-up study. Int Orthop. 1998; 22(4) : 219-224.
[3] C. Batailler, C. Fary, R. Verdier, T. Aslanian, J. Caton, S. Lustig. The evolution of outcomes and indications for the dual mobility cup: a systematic review.
[4] M.S. Abdelaal, E. Zachwieja, P.F. Sharkey. Severe Corrosion of Modular Dual Mobility Acetabular Components Identified During Revision Total Hip Arthroplasty. Arthroplasty Today 8 (2021) 78-83.
[5] R. Civinini, A. Cozzi Lepri, C. Carulli, F. Matassi, M. Villano, M. Innocenti. Patients Following Revision Total Hip Arthroplasty With Modular Dual Mobility Components and Cobalt-Chromium Inner Metal Head are at Risk of Increased Serum Metal Ion Levels. The Journal of Arthroplasty 35 (2020) S294-S298.
[6] J.M. Kolz, C.C. Wyles, D.W. Van Citters, R.M. Chapman, R.T. Trousdale, D.J. Berry. In Vivo Corrosion of Modular Dual Mobility Implants: A Retrieval Study. The Journal of Arthroplasty 2020; 35 (11): 3326-3329.
[7] K.A. Sonn, R.M. Meneghini. Adverse Local Tissue Reaction due to Acetabular Corrosion in Modular Dual-Mobility Constructs. Arthroplasty Today 6 (2020) 976-980.
[8] W.C. Witzleb, J. Ziegler, F. Krummenauer, V. Neumeister, K.P. Guenther. Exposure to chromium, cobalt and molybdenum from metal-on-metal total hip replacement and hip resurfacing arthroplasty. Acta Orthopaedica2006; 77:5, 697-705.
[9] I. De Martino, G.K. Triantafyllopoulos, P.K. Sculco, T.P. Sculco. Dual mobility cups in total hip arthroplasty. World J. Orthop2014; 5(3): 180-187.