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MagnetOs Putty
Move the needle in fusion with speed and efficiency
Molding our solutions to your needs. MagnetOsTM Putty is our most robust moldable formulation. Delivering resilient handling with all the benefits of our NeedleGripTM powered surface technology.1,3
Simply warm MagnetOs Putty in your hands, mold into the desired shape, and use it to fill voids and spaces found in joint fusion or traumatic indications of the foot and ankle and upper extremity.1,3
Powered by harnessing the immune system
MagnetOs Putty is capable of polarizing macrophages from the M1 pro-inflammatory to the M2 pro-healing phenotype, which is known to influence bone growth through the secretion of proteins such as BMP-2. Furthermore, MagnetOs has demonstrated the ability to form bone in a canine intramuscular pouch model without the addition of cells or growth factors.*†‡2,4,5 These understandings and evidence combine to define MagnetOs as a powered solution for predictable fusions and traumatic reconstructions of the extremity.
Easy to store with predictable handling
Unlike frozen allografts, MagnetOs can be stored at ambient temperature (max. 45ºC / 113°F) with no special requirements.3 MagnetOs Putty is ready-to-use straight out of the package with no preparation time or thawing needed. The carrier is designed to maximize handling properties, so you can twist, tear, and mold it into any shape desired before implantation and remain confident that it will stay in place during fusion related joint compression while also resisting migration and irrigation.1,3,6,7
Free of animal & human tissues
MagnetOs Putty contains no animal or human-derived tissue – just like MagnetOs Granules and MagnetOs Easypack Putty.1,3 This alleviates patient concerns during consent for use of allograft or xenograft-derived products in surgery.
Clinical Storyboard
MagnetOs Putty in a Double Arthrodesis of the Talonavicular and Subtalar Joints
Dr. Jesse Doty MD is an orthopedic surgeon with responsibilities as director of foot & ankle surgery at Erlanger Health System and Professor of Orthopedic Surgery at University of Tennessee. Dr. Doty treats a wide range of foot and ankle conditions, including complex lower extremity deformities sports injuries, minimally invasive surgery of the foot and ankle, lower extremity fractures, chronic foot and ankle deformities, and ankle replacement.
In the interactive Clinical Storyboard below, one of Dr. Doty’s patient is followed before and after fusion using MagnetOs Putty for a double arthrodesis of the hindfoot.
Demographics
72-year-old female
BMI 25 kg/m2
Past medical history:
- Hypothyroidism
- Hypertension
- Hyperlipidemia
- Gastric reflux disease
Patient History
The patient reports a decades-long history of chronic right foot pain. The patient describes progressive discomfort during ambulation, localized to both the medial and lateral aspects of the ankle and hindfoot. Additional pain is noted in the plantar arch region.
Preoperative Exam
Motor function:
There is a lack of active inversion in a plantarflexed position, with compensatory recruitment of the tibialis anterior tendon.
Passive correction:
The foot can be partially repositioned to neutral at the hindfoot. This limited correction is due to spasticity in the peroneal tendons and the presence of ankle equinus.
Preoperative Radiograph Assessment
Radiographic assessment
Ankle congruence with peritalar subluxation and collapse of the longitudinal arch. Lateral
Preoperative X-rays
Preoperative X-rays
Diagnosis
Progressive collapsing foot deformity with:
- Peritalar subluxation including spring ligament incompetence
- Posterior tibial tendon dysfunction
- Peroneus brevis contracture
- Subfibular impingement
- Gastrocnemius contracture
Procedure
Double arthrodesis of the talonavicular and subtalar joints to correct all planes of deformity with gastrocnemius recession, brevis to longus transfer and flexor digitorum longus (FDL) tendon transfer.
Product Selection
Graft:
- Subtalar: 2.5cc MagnetOs Putty synthetic bone graft, not mixed or combined
with other graft - Talonavicular: 2.5cc MagnetOs Putty synthetic bone graft, not mixed or
combined with other graft
Fixation:
- Subtalar: 2 x 6.5mm cannulated screws
- Talonavicular: 3 x 3.0mm cannulated screws
6 Week X-rays
6 Week X-rays
12 Week Postoperative Exam
At 12 weeks, stable fixation is still apparent with evidence of bony union and further indication of overall construct stability even after six weeks of ambulation. For this reason, the patient was confidently transitioned out of a walking boot and into standard footwear.
12 Week X-rays
12 Week X-rays
Product code Volume Dimensions (mm) Granule size (mm)
703-029-US 1 18 L x 8 W x 7 H 1 – 2
703-043-US 2.5 28.5 L x 11 W x 8 H 1 – 2
703-035-US 5 40 L x 18 W x 7 H 1 – 2
703-038-US 10 40 L x 36 W x 7 H 1 – 2
Want to learn more about MagnetOs Putty?
Book your own appointment with one of our scientific experts.
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* In large animal models.
† Results from in vivo laboratory testing may not be predictive of clinical experience in humans. For important safety and intended use information please visit kurosbio.com.
‡ MagnetOs is not cleared by the FDA or TGA as an osteoinductive bone graft.
- Data on file. MagnetOs Putty and MagnetOs Easypack Putty.
- Duan, et al. eCM. 2019;37:60-73.
- Instructions for Use (IFU) MagnetOs Granules (US). Instructions for Use (IFU) MagnetOs Putty (US). Instructions for Use (IFU) MagnetOs Easypack Putty (US).
- Van Dijk, et al. eCM. 2021;41:756-73.
- Van Dijk, et al. J Immunol Regen Med. 2023;19:100070.
- Fusco TA, et al. FASTRAC. 2022;2(1):100150.
- Fusco TA, et al. Foot and Ankle Surgery: Techniques, Reports & Cases. 2022;2(1).
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