Moving forward
in partial knee

CONCEPT

MOTO medial was designed with the aim to optimize the anatomical fit and compartment-specific coverage for the broadest range of patient anatomies. It features a patient specific gap balance and alignment technique with minimized and precise bone resections, without ligament releases. The implant design and instrumentation work together so that intraoperative decision making and flexibility are optimized for each patient.

DESIGN PHILOSOPHY

Fixed-bearing, round-on-flat design in partial knee replacement has shown the potential to provide excellent midterm and long-term results, as reported in clinical studies and registry data [1-5], however there is still potential for improvement in terms of anatomic fit, size range, intraoperative feel and technique. MOTO Medial Partial Knee follows this proven philosophy but improves upon implant and instrument design, as well as flexibility of the system, taking the potential of partial knee arthroplasty to the next level.

 

GOALS

MOTO Medial was designed with clear goals:

  • accommodate individual anatomy to achieve optimal coverage and fit
  • provide correct and individualized balance and alignment at every step of the procedure with the potential to decrease the incidence of loosening and progression of disease - main reasons for revision of unicompartmental knee replacement [6-10].

 

FEATURES

To achieve improvements to patient outcomes, surgeons can rely on these unique and superior MOTO Medial features :

  • ENHANCED IMPLANT DESIGN
  • UNPARALLELED OPERATIVE FLEXIBILITY
  • COMPREHENSIVE SURGEON EDUCATION
PRODUCT RANGE

FEMORAL COMPONENT

Anatomic design, specific for medial compartment
10 sizes Right Medial / Left Medial
Material: Cobalt-Chrome (Co-Cr-Mo ISO 5832-4)
Cemented

FIXED TIBIAL TRAY

Anatomic, specific for medial compartment
8 sizes Right Medial / Left Medial
Material: Titanium (Ti-6Al-4V ISO 5832-3)
Cemented

FIXED INSERT

Anatomic, specific for medial compartment
8 sizes  Right Medial / Left Medial
6 levels of thickness: 8, 9, 10, 11, 12 and 14
Material:  Machined Ultra High Molecular Weight Polyethylene (UHMWPE - ISO 5832-2 Type 1)

SPECIAL FEATURES

ENHANCED IMPLANT DESIGN

Extensive anthropometric research was performed on cases selected from our internal database containing more than 45.000 CT and MRI scans of knees[11] from all countries to validate the MOTO implant design.

  • ANATOMIC AND COMPARTMENT-SPECIFIC SHAPE
    Replicate the morphology of native medial femur and tibia for an optimal shape matching and coverage.
  • IMPROVED AND OPTIMIZED RANGE OF SIZE OPTIONS
    10 femoral and 8 tibial sizes with fine increments that best fit the full spectrum of anatomic profiles.
    Range of inserts with 1mm increments (8, 9,10, 11,12, 14).

The incredibly accurate implant sizing allows for full cortical rim contact on the tibial component to prevent subsidence. The femoral component has an extended posterior condyle to allow patients deep flexion MOTO without posterior impingement.[12] – Mandume Kerina, MD

UNPARALLELED OPERATIVE FLEXIBILITY

The MOTO “Balanced & Aligned Resection Philosophy” enables independent balancing of the flexion and extension gaps in 1mm increments.

  • Multiple gap-balance options: instruments designed to allow millimetric bone resections, tailored to patient anatomy and soft tissue balance, avoiding ligament releases.
  • Ability to fine tune gaps, implant size and position at any point in the procedure:
    • same femoral pegs position and optimized internal profile across sizes, facilitating intraoperative size change
    • adjustable M/L position of femoral component anytime until pegs are drilled, after trial reduction

The ability to make resections to the millimeter with independent flexion and extension balancing is the greatest feature of the MOTO. I never have to worry about overcorrecting a knee. This allows me to obtain the perfect alignment and a well-balanced knee. It is efficient, and addresses any issues I might encounter, even in the ACL-deficient or reconstructed patients.[12] – Akbar Nawab, MD.
I have never burned any bridges with this technique as  I can revise any step through the surgery. If I want to go back and fine tune one of my first steps I can do that as easily as I can. I can even change the femoral component up or down a size after the lug holes have been drilled. It is the most flexible system I have ever used.[12] – Ryan Molli, DO

COMPREHENSIVE SURGEON EDUCATION

MOTO offers you MORE to deliver the best outcomes to your patients.

  • A dedicated and unique Education Program created around the MOTO provides top level medical education and continuous support to healthcare professionals.
  • Expert and passionate surgeons share their experience on how to leverage MOTO’s unique design features, along with the instruments and surgical technique, to treat each individual’s anatomy.
  • Educational courses with live surgeries, cadaveric hands-on sessions and direct interaction with Partial Knee Mentors to explore philosophy, indications and advantages of this procedure.
  • Educational path tailored to every surgeon’s needs, with continuous support and proctoring assistance.

Medacta’s commitment to surgeon education is a key component to the success of MOTO. Surgeons benefit from one-on-one instruction and proctoring as well as visiting design surgeons and attending learning centers for didactics and cadaver lab training.[12] – Anthony Robins, MD

M.O.R.E. EDUCATION PROGRAM: MOTO MEDIAL

COMMITMENT TO OUTPATIENT PROCEDURE

MOTO Medial has been designed with ambulatory surgery centers in mind:

  • No need for expensive robotic technologies to achieve correct sizing, positioning, and balance.
  • An efficient procedure based on streamlined workflow and easy-to-use instruments.
  • Minimized instrumentation footprint.

Maximized efficiency for same day surgeries!

REFERENCES

[1] Vasso M et al,Unicompartmental knee arthroplasty is effective: ten year results. International Orthopaedics (SICOT) (39:2341-2346). 
[2] Schiavone A et al Unicompartmental knee replacement provides early clinical and functional improvement stabilizing over time. Knee Surg. Sports Traumatol. Arthrosc (2012) 20:579-585. 
"[3] Baur J et al,Metal backed fixed-bearing unicondylar knee arthroplasties using minimal invasive surgery: a promising outcome analysis
of 132 cases. BMC Musculoskelet Disord. 2015 Jul 31;16:177."
[4] AOA National joint replacement registry – Annual Report 2017. 
[5] National Joint Registry for England, Wales, Northern Ireland and the Isle of Man – Annual Report 2017.
[6] Bini S et al. Surgeon, Implant, and Patient Variables May Explain Variability in Early Revision Rates Reported for Unicompartmental Arthroplasty. J Bone Joint Surg Am. 2013;95:2195-202.
[7] Bergeson AG et al., Medial mobile bearing unicompartmental knee arthroplasty early survivorship and analysis of failures in 1000 consecutive cases, J Arthroplasty, 2013. 28 (2):172-175
[8] Marmor L Unicompartmental knee arthroplasty. Clin Orthop Relat Res 1988;226: 14.
[9] Berger RA et al. Results of unicompartmental knee arthroplasty at a minimum of ten years of follow-up. J Bone Joint Surg Am 2005;87:999. 
[10] Small S et al. Metal backing significantly decreases tibial strains in a medial unicompartmental knee arthroplasty model. J Arthroplasty 2011;26:777.
[11] Data on file Medacta – MyKnee Database
[12] Medacta moves into partial knees with the MOTO medial partial knee - Becker's Healthcare ASC Review