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.​


Mpact System
Hemispherical cementless cup with SensiTiN DM Converter

Mpact 3D Metal
Hemispherical cementless cup with SensiTiN DM Converter

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.