Moving forward
in partial knee

CONCEPT

MOTO Lateral is a compartment-specific, fixed-bearing implant that further expands the MOTO Partial Knee System, offering the opportunity to treat osteoarthritis localized on the lateral femoral and tibial condyles. MOTO Lateral and MOTO Medial provide the surgeon with a comprehensive range of options to resurface only the affected portion of the patient’s knee. 

MOTO Lateral was designed with the aim of optimizing 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 minimal 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

The fixed-bearing, round-on-flat design in partial knee replacement has demonstrated 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. Both MOTO Medial and MOTO Lateral Partial Knees have been developed in alignment with this proven philosophy, but feature an improved implant and instrument design, as well as flexibility of the system, taking the potential of partial knee arthroplasty to the next level.

The MOTO System was designed with clear goals:

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

To achieve improvements to patient outcomes, surgeons can rely on the following unique and superior MOTO System features:

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

FEMORAL COMPONENT

Anatomic design, specific for lateral compartment
7 sizes for Right/Left Lateral component
Material: Cobalt-Chrome (Co-Cr-Mo ISO 5832-4) or Cobalt-Chrome (Co-Cr-Mo ISO 5832-4) + SensiTiN coating
Cemented

FIXED TIBIAL TRAY

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

FIXED INSERT

Anatomic, specific for lateral compartment
8 sizes that couple with right/left tibial trays
7 levels of thickness: 7*, 8, 9, 10, 11, 12 and 14 mm
Material: Machined Ultra High Molecular Weight
Polyethylene (UHMWPE - ISO 5832-2 Type 1) or E-CROSS (Vitamin E Highly Crosslinked UHMWPE)

*available only as E-CROSS poly.

SPECIAL FEATURES

ENHANCED IMPLANT DESIGN

Extensive anthropometric research was performed on selected cases 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
    Replicates the morphology of native lateral femur and tibia for an optimal shape matching and coverage.
  • IMPROVED AND OPTIMIZED RANGE OF SIZE OPTIONS
    7 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).

Uncompromised fit, coverage and positioning

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 the patient's 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 peg positions and optimized internal profile across sizes, facilitating the intraoperative size change
    • adjustable M/L position of femoral component anytime until pegs are drilled, after trial reduction

Balance without complexity, maximize individualized outcome

COMPREHENSIVE SURGEON EDUCATION

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

  • A dedicated and unique Education Program created around the MOTO System 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, wet lab 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.
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
[12] Medacta moves into partial knees with the MOTO medial partial knee - Becker's Healthcare ASC Review

Resources
For additional resources please visit resources.medacta.com