BioBall® Duo Head

Bipolar head with pre-assembled BioBall® Metal Head

The BioBall® Duo Head is a bipolar head with the outer shell, the inlay and the inner head pre-assembled. Good acetabular tissue quality is a prerequisite for bipolar head implantation, as it serves as an articulation partner for the metal cup. Combination with the BioBall® Adapter enables intraoperative correction of offset, neck length, lateralisation/medialisation and antetorsion/retrotorsion.

Properties / technical data

  • Usable in natural acetabulum with residual connective tissue
  • Mirror polished outer cup with inlay and pre-assembled, freely movable BioBall® Metal Head
  • No on-site head assembly required – BioBall® Metal Head comes pre-assembled depending on size (Ø 28mm or Ø 32mm)
  • Compatibility with BioBall® adapters allows intraoperative correction of neck length, medialisation/lateralisation and correction of retro- or antetorsion
  • Available sizes: Ø 42 mm – Ø 58 mmShell and head material: Vivium®* (DIN ISO 5832-9)Inlay material: UHMWPE (DIN ISO 5834-2)

* Vivium® is a registered trademark of Merete GmbH (High Nitrogen Stainless Steel DIN ISO 5832-9).


  • Advanced wear of the proximal femur due to degenerative, post-traumatic or rheumatic diseases with well-preserved acetabulum, including medial femoral neck fractures and advanced avascular necrosis of the femoral head, which cannot be treated using conservative or joint-preserving surgical procedures
  • Hemiarthroplasty in osteosynthetic untreated femoral neck fractures

Case studies

Click here for various case studies related to the BioBall® Adapter System. If you have any questions regarding individual treatment strategies or would like more information, please contact Customer Service.


Click here for current literature on the BioBall® system.

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