Femoral Stem

Product Details
Product Description
Specification
Video
Technology Education
FAQ
Related Products

Product Details

HARMONY Tapered Femoral Stem

- Perfect combination of American and European stem designs

- Proximal stepped design increases coating surface area, blocks debris, and effectively reduces postoperative loosening

- Rough surface treatment ensures bone ingrowth

- Excellent biomechanical performance ensures immediate anti-rotation fixation during surgery

- Optimized range of motion

product details

product description

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

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?
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(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?
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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?
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Designed exclusively for cementless fixation

Promotes excellent long-term bone growth for stable and durable fixation.

Eliminates the need for bone cement.