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The Bencox Bipolar Cup system is intended for cementless use in partial or total hip arthroplasty in primary or revision surgery for the following conditions:

a. Non-inflammatory degenerative joint disease, such as avascular necrosis, osteoarthritis, traumatic arthritis;

b. Inflammatory degenerative joint disease, such as rheumatoid arthritis;

c. Treatment of non-union, femoral neck fracture and trochantric fractures of the proximal femur with head involvement, unmanageable using other techniques;

d. Patients with failed previous surgery where pain, deformity, or dysfunction persists;

e. Revision of previously failed hip arthroplasty.

The BENCOX Bipolar Cup System is a cementless, metal-on-polyethylene bearing hip system for hip arthroplasty. It consists of components, Femoral stem -BENCOX ID Stem; Femoral head - BENCOX Metal Head; Acetabular system -BENCOX Bipolar Cup (Shell; Insert; Lock Ring & PE ring) and BENCOX Hip Instrumentation.

The Bencox ID Stem is manufactured from titanium alloy (Ti-6AI-4V ELI) conforming to ASTM F136, Standard Specification for Wrought Titanium-6 Aluminum-4 Vanadium ELI (Extra Low Interstitial) Alloy for Surgical Implant Applications (UNS R56401) and has a proven titanium plasma spray coating with pure titanium conforming to ASTM F1580-07, Standard Specification for Titanium and Ti-6 Al-4 V Alloy Powders for Coatings of Surgical Implants with about two decades of clinical experience

Bencox Metal Head components are manufactured from cobalt-chromiummolybdenum alloy conforming to ASTM F1537, Standard Specification for Wrought Cobalt-28-Chromium-6-Molybdenum Alloys for Surgical Implants (UNS R31537, UNS R31538, and UNS R31539).

The BENCOX Bipolar Cups are provided as the preassembled cup (CoCr shell + PE Liner) and PE ring is assembled by the user (surgeon). The shell is made of Cobaltchromium-molybdenum alloy conforming to ASTM F75-07, Standard Specification for Cobalt-28 Chromium-6 Molybdenum Alloy Castings and Casting Alloy for Surgical Implants. The PE liner and locking ring is made of Ultra-high molecular weight polyethylene conforming to ASTM F648 Standard Specification for Ultra-High-Molecular-Weight Polyethylene Powder and Fabricated Form for Surgical Implants.

Bencox Bipolar Cup System components are sterilized by gamma irradiation.

The provided document is a 510(k) Premarket Notification for a medical device, the BENCOX Bipolar Cup System. This type of document is centered on demonstrating substantial equivalence to legally marketed predicate devices, not on proving performance against specific acceptance criteria for a new AI/software-driven medical device.

Therefore, the document does not contain any information related to:

• A table of acceptance criteria and reported device performance (in the context of AI/software).
• Sample sizes for test sets or data provenance for AI/software.
• Number of experts and their qualifications for establishing ground truth for AI/software test sets.
• Adjudication methods for AI/software test sets.
• Multi-Reader Multi-Case (MRMC) comparative effectiveness studies.
• Standalone (algorithm-only) performance.
• Type of ground truth used (expert consensus, pathology, outcomes data) for AI/software.
• Sample size or ground truth establishment for a training set of an AI/software device.

Explanation:

The 510(k) Premarket Notification process for devices like the BENCOX Bipolar Cup System focuses on bench testing (performance testing) and material characterization to demonstrate that the new device is as safe and effective as a legally marketed predicate device. The performance tests mentioned (ISO standards like 7206-4, 7206-9, etc., and ASTM standards like F1147, F1044, etc.) are mechanical and material tests specific to orthopedic implants, assessing aspects like fatigue strength, wear, and corrosion resistance.

The document explicitly states the basis for substantial equivalence:

• Same intended use
• Same operating principles
• Same basic designs
• Same materials
• Similar packaging and sterilization

This is a traditional medical device submission, not one for an AI or software as a medical device (SaMD), which would require clinical performance data against specific metrics and ground truth.

In summary, the requested information regarding AI/software device acceptance criteria, study design, and ground truth establishment is not present in this document because it describes a mechanical orthopedic implant, not an AI/software medical device.

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The HA Mallory/Head® Porous Femoral Stem & HA Mallory/Head® Porous Lateralized Femoral Stem are indicated for use for 1) Non-inflammatory degenerative joint disease including osteoarthritis and avascular necrosis; 2) Rheumatoid arthritis; 3) Correction of functional deformity; 4) Treatment of non-union, femoral neck fracture, and trochanteric fractures of the proximal femur with head involvement, unmanageable using other techniques; and 5) Revision procedures where other treatments or devices have failed.

The HA Mallory/Head® Porous Femoral Stems & HA Mallory/Head® Porous Lateralized Femoral Stems are the same as each of their predicate(s)- Mallory/Head® Femoral Stem 510(k)- K921181 and Mallory/Head® Lateralized Press-Fit Femorals 510(k)s- K000538 and K003429, except for the addition of Hydroxyapatite Coating and additional sizes for the standard femoral stems.

The provided document describes the FDA 510(k) premarket notification for the HA Mallory/Head® Porous Femoral Stem & HA Mallory/Head® Porous Lateralized Femoral Stem. It states very clearly that no clinical testing was provided as a basis for substantial equivalence.

Therefore, the following information cannot be extracted from the document:

• Acceptance Criteria and Reported Device Performance: This would typically be based on clinical or comparative performance data, which is explicitly stated as not having been provided.
• Sample size used for the test set and data provenance: No clinical test set was used.
• Number of experts used to establish the ground truth for the test set and their qualifications: No ground truth was established from clinical data.
• Adjudication method for the test set: Not applicable as no clinical test set was used.
• Multi reader multi case (MRMC) comparative effectiveness study: Not applicable as no human-in-the-loop study was conducted.
• Standalone (i.e. algorithm only without human-in-the-loop performance) study: Not applicable as this is a physical medical device, not an algorithm.
• Type of ground truth used: Not applicable as no ground truth based on clinical data was used.
• Sample size for the training set: Not applicable as there is no mention of a "training set" in the context of device development.
• How the ground truth for the training set was established: Not applicable.

The basis for substantial equivalence was Non-Clinical Testing, specifically "Mechanical Testing with an Engineering Justification" which determined that the components presented no new risks and were substantially equivalent to predicate devices. The predicate devices are listed as the Mallory/Head® Porous Femoral Stem (K921181) and Mallory/Head® Lateralized Press-Fit Femorals (K000538 and K003429).

This means the acceptance criteria and performance are based on engineering standards and mechanical properties, not clinical outcomes from a study involving human subjects or expert assessment of data. The document does not provide specific numerical acceptance criteria or performance metrics from this mechanical testing, only that it "determined that the HA Mallory/Head® Porous Femoral Stems & HA Mallory/Head® Porous Lateralized Femoral Stems' components presented no new risks and were, therefore, substantially equivalent to the predicate device."

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