ARROW II universal shoulder prosthesis

When it was introduced in 2003, the ARROW shoulder system was one of the first universal systems for shoulder arthroplasty.

It allows surgeons to implant a reverse or anatomical prosthesis with the same set of instruments.

The universal stem can be used with and without cement for hemiarthroplasty, total anatomical (4-peg cemented glenoid base or cementless metal-back base) or reverse shoulder arthroplasty.

The instrumentation set consists of four instrument baskets.

Depending on the patient’s needs, the surgeon may have to revise the prosthesis.

The surgeon can keep the current humeral stem and then:
– convert a hemiarthroplasty into a reverse shoulder or
– convert a total shoulder into a reverse shoulder

The surgeon can also keep the humeral stem and metal-back glenoid base and then
– convert a total shoulder with metal-back glenoid base into a reverse shoulder

The single instrumentation set for both types of implants is simple and contributes to the reproducibility of these techniques.

The indications for shoulder arthroplasty are scheduled surgery (osteoarthritis or glenohumeral OA, rheumatoid arthritis, fracture sequelae) and trauma surgery (complex proximal humerus fractures).

The patient’s age, condition of the rotator cuff and bone stock determine which implant is needed.

Arrow II total shoulder arthroplasty (humeral and glenoid sides) is ready for e-ORTHO templating software.

HUMERAL PART

Stem:
– Universal stem for both anatomical or reverse arthoplasty.
– Quadrangular titanium stem, smooth at diaphyseal level and T40 coated with HAP at metaphyseal level.
– Cemented and cementless version which can be cemented on its diaphysis.
– Size ranging from 6 to 14 mm increment 2 mm (16 mm on request).

Head (anatomical):
– Off centred head +2 and +4 mm, size 2 by 2 from Ø 39 au Ø 54 according to the head chosen.
– Different diameters (from 39 to 54) and up to 2 thicknesses available depending on the head chosen.
– Stainless steel.

Humeral insert (reverse):
– Standard and off-centered +4 mm.
– Impacted by morse taper.
– UHMWPE  on a metal-back.

GLENOID SIDE

Metal-back base plate including keel and front leg:
– Universality, used for both  anatomical and reverse prosthesis.
– T40 HAP-coated.
– 3 sizes available in short (S, M, L) and long peg (XS, S, M).

Glenosphere (reverse):
– 3 sizes (36, 39, 42 on request).
– Stainless steel.
– Impacted in the glenoid base by centered morse taper.

Cemented glenoid (anatomical):
– 4 cemented anchorage pegs.
– 3 sizes (44, 46, 48) + 1 on request (50).
– In UHMWPE.

Glenoid insert (anatomical):
– 3 sizes (XS/S, M, L).
– In UHMWPE.

UNIVERSAL INSTRUMENT SET: ANATOMICAL & REVERSE

– 4 trays (1 anatomical prosthesis, 2 reverse prosthesis, 1 option/revision case).
– For a metal-back base plate, a glenoid bone preparation in only 2 steps.

 

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