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China Suppliers HARMONY Tapered Femoral Stem - Advanced Design for Optimal Performance from Leading Factory
🛡️ Special Description
📐 Proximal Step-Design
- Increases coating surface area to block debris, reducing postoperative loosening
- Stair-step and secondary compressive trabecular alignment
- Effectively prevents femoral stem subsidence
📊 Load Transmission
- Pattern of load transmitting follows Wolff's Law
🧪 Three Coating Options
- 1. Ti (Air Plasma Sprayed)
- 2. Ti (Vacuum Plasma Sprayed)
- 3. Ti+HA (Vacuum Plasma Sprayed)
- Porosity: 70%
- Ti coating thickness: 325 um, HA coating thickness: 50 um
- Increase friction with cortical bone for immediate stability
- Good biocompatibility effectively promotes bone growth
⚙️ Optimized Head-Neck Ratio
- Significantly increases range of motion
- 28mm head → increase 12°
- 32mm head → increase 20°
📐 High Offset Design
- Proportional neck length and offset design effectively increase range of motion
⚙️ Special Instrumentation
HARMONY™ Stem, Ti (Air Plasma Sprayed)
| Specification | Stem length (mm) | Offset | Neck Angle | Material |
| 09# | 135 | 38 | 130° | Ti6Al4V |
| 10# | 140 | 38 | ||
| 11# | 145 | 40 | ||
| 12# | 150 | 40 | ||
| 13# | 155 | 44 | ||
| 14# | 160 | 44 | ||
| 15# | 165 | 46 | ||
| 16# | 170 | 46 |
HARMONY™ Stem, Ti (Vacuum Plasma Sprayed)
| Specification | Stem length (mm) | Offset | Neck Angle | Material |
| 09# | 134 | 38 | 130° | Ti6Al4V |
| 10# | 140 | 38 | ||
| 11# | 145 | 40 | ||
| 12# | 151 | 40 | ||
| 13# | 156 | 44 | ||
| 14# | 162 | 44 | ||
| 15# | 168 | 46 | ||
| 16# | 173 | 46 | ||
| 17# | 178 | 48 |
HARMONY™ Stem, Ti+HA (Vacuum Plasma Sprayed)
| Specification | Stem length (mm) | Offset | Neck Angle | Material |
| 09# | 134 | 38 | 130° | Ti6Al4V |
| 10# | 140 | 38 | ||
| 11# | 145 | 40 | ||
| 12# | 151 | 40 | ||
| 13# | 156 | 44 | ||
| 14# | 162 | 44 | ||
| 15# | 168 | 46 | ||
| 16# | 173 | 46 | ||
| 17# | 178 | 48 |
🎥 Video
📖 Technology Education
JUST MED_Surgical Technique Manual_HARMONY Tapered Stem_Cementless.pdf
❓ FAQ
1. Which patients is this hip implant suitable for?
(1) Patients with Low Soft Tissue Tension: Ideal for individuals with reduced peri-hip soft tissue tension, such as frail elderly female patients.
(2) Extensive Soft Tissue Release Cases: Beneficial for surgeries that involve wide soft tissue release. In these cases, postoperative soft tissue laxity can predispose to dislocation, and adjustments via the femoral head alone may be insufficient (especially when using ceramic heads).
(3) Post-Coxa Vara Correction: In patients undergoing correction of coxa vara, a standard (132° neck-shaft angle) femoral stem might cause limb lengthening; the Harmony design minimizes this risk.
(4) Complex Femoral Anatomy: For patients with trumpet-shaped or champagne cup–shaped femurs, achieving an optimal proximal press-fit may require upsizing the implant, which can lead to limb lengthening—our design helps to balance this challenge.
(5) Developmental Dysplasia of the Hip (DDH): Especially useful in cases with a shallow, small acetabular cavity, where deeper reaming and precise femoral head centralization are necessary.
(6) Femoral Dysplasia: Suitable for patients with a narrow medullary canal and a relatively long femoral neck.
(7) Post-Pelvic Osteotomy Cases: Advantageous for patients with medial displacement of the acetabular rotation center following procedures like pelvic osteotomy.
2. Can patients undergo MRI scans after implantation?
Yes, the implant is made from non-magnetic materials like titanium, titanium alloys, and cobalt-chromium-molybdenum alloys, ensuring MRI safety. JUST MEDICAL's products meet these standards, but always inform your radiologist before scanning.
3. Does this product support cemented or cementless fixation?
Designed exclusively for cementless fixation.
Promotes excellent long-term bone growth for stable and durable fixation.
Eliminates the need for bone cement.
4. What are the key options and specifications for the stem coating?
The HARMONY™ Stem offers three coating options: Ti (Air Plasma Sprayed), Ti (Vacuum Plasma Sprayed), and Ti+HA (Vacuum Plasma Sprayed). It features a porosity of 70%, with a Ti coating thickness of 325 um and an HA coating thickness of 50 um.
5. How does the optimized head-neck ratio benefit range of motion?
The design significantly increases the range of motion. A 28mm head increases the range of motion by 12°, while a 32mm head increases it by 20°.
6. What materials are used to manufacture the HARMONY™ Stem?
All three configurations of the HARMONY™ Stem (Ti Air Plasma, Ti Vacuum Plasma, and Ti+HA Vacuum Plasma) are manufactured using high-strength Ti6Al4V material.