BI-MENTUM™ Dual Mobility System
How do you manage complex cases?
Evidence indicates dislocation is a common driver for revision Total Hip Arthroplasty (THA) due to instability. 1
Currently available evidence indicates that a dual mobility implant is becoming a leading treatment option to address instability for complex primary2-4 fracture neck of the femur (FNOF)5-7 and revision hip surgery.8-10
Managing patients with a higher risk of dislocation
BI-MENTUM Acetabular Cups are especially indicated for patients demonstrating a high risk of instability.11
Managing patients with a higher risk of peri-prosthetic fracture
Peri-Prosthetic Fracture remains a major complication following THR, often associated with a poor outcome, high mortality rate and incomplete functional recovery.12 Advanced age is considered a risk factor for post-op peri-prosthetic fracture.12
CORAIL Collared has a significantly fewer revisions due to peri-prosthetic fracture when compared to all other cementless hips in the UK NJR.13
What do the CORAIL PINNACLE Faculty Recommend?
When asked, 14 out of 15 members of the CORAIL International Faculty group confirmed they would recommend a collared CORAIL in combination with BI-MENTUM for patients at high risk of dislocation.14
Agreement with SERF
To further enhance the DePuy Synthes portfolio, a strategic co operation and supply agreement has been formed with Société d’Etude, de Recherche et de Fabrication (SERF) to exclusively launch the SERF NOVAE® SunFit TH Dual Mobility System under the brand name BI-MENTUM Dual Mobility System.
SERF is the original developer of the dual mobility implant with over 40 years of clinical experience.16 According to a recent clinical study, the SERF NOVAE® SunFit TH Dual Mobility system, which was introduced in 2007, has clinical results showing that the first 100 patients (104 primary total hip arthroplasties) had a 100 percent cup survivorship with zero dislocations at 10 years.15
Herispherical Cup with 3 mm cylindrical extension
Pressfit only fixation with Alumina and Hydroxyapatite Coating
Circumferential Macrostructure and Titanium and Hydroxyapatite Coating
Identical Pressfit Design, Fratures and Coating as Novae TH
Over 40 years clinical experience.16
165,000 cups provided worldwide since 2007.17
(Serf NOVAE Dual Mobility Families of Cups)
BI-MENTUM Pressfit Acetabular Cup
Cementless BI-MENTUM dual mobility cups are coated with plasmasprayed titanium (150 +/- 30 μm) and hydroxyapatite (70 +/- 20 μm). All cup variants have a polished bearing surface with a 3 mm cylindrical extension which increases jump distance compared to a hemispherical bearing.
- A macrostructure of concentric rings increases the surface area with the aim of improving primary fixation.
- The external pole of the cup is slightly flattened (-0.5 mm) to reduce stresses at the base of the acetabular (preventing the cup been forced out of the acetabular) allowing better cup impaction and pressfit at equator of the cup.
BI-MENTUM Plus and BI-MENTUM Revision
BI-MENTUM Plus and BI-MENTUM Revision dual mobility cups have the same macrostructure and coating as the BI-MENTUM Pressfit Dual Mobility system. These variants allow for additional fixation through the use of cortical screws and anchoring pegs, the revision cup also has an obturator hook for additional fixation.
BI-MENTUM Plus and Revision dual mobility cups are anchored in the acetabulum using the tripod principle: 1 peg in the ischium, 1 peg in the pubic bone and cortical screws in the ilium through flanges. BI-MENTUM Revision dual mobility cups also utilise an obturator hook to ensures anatomical re-centering and provides additional mechanical support.
BI-MENTUM Cemented Acetabular Cup
BI-MENTUM Cemented dual mobility cups are grit blasted and have radial; circumferential and longitudinal grooves to aid primary anchoring and rotational stability in the cement mantle. Cemented cup can be used alone or in combination with the BI-MENTUM Reinforcement Plates.
BI-MENTUM Reinforcement Plates
BI-MENTUM Reinforcement Plates have a cruciform shape with an obturator hook and ischial flange designed to accommodate up to four screws.
- The plates are both sided (Left and Right) and size specific.
- The plates have an outer diameter (OD) designed to fit with BI‑MENTUM cemented cups with OD 7 mm smaller than the plate e.g. a 50 mm BI-MENTUM Reinforcement Plate accomodates a 43 mm BI‑MENTUM cemented cup.
- Spacers on each arm of the plate help to maintain a uniform cement mantle.
BI-MENTUM Polyethylene Acetabular Liners
The unconstrained polyethylene (PE) Liners are made from conventional UHMWPE (GUR1020). When articulating within the polished stainless steel cup, a PE liner transfers reduced torque to the cup when compared with hard on hard bearings.18