1. “Owl” Technique for All-Arthroscopic Augmentation of a Massive or Large Rotator Cuff Tear With Extracellular Matrix Graft 
A. Ali Narvani, M.B.B.S.(Hons), M.Sc.(Sports Med)(Hons), F.R.C.S.(Orth&Trauma), M.F.S.E.M.(UK), Paolo Consigliere, M.D., M.Ch.(Ortho&Trauma), Ioannis Polyzois, M.B.Ch.B., M.R.C.S., C.C.S.T.Orth., F.E.B.O.T., Tanaya Sarkhel, M.D., M.Ch.(Ortho&Trauma), F.R.C.S., Rohit Gupta, M.D., M.Ch.(Ortho&Trauma), F.R.C.S., Ofer Levy, M.D., M.Ch.(Orth), F.R.C.S. 
Arthroscopy Techniques 
Volume 5, Issue 4, Pages e717-e724 (August 2016)
DOI: /j.eats
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2. Fig 1
Greater tuberosity preparation (A), medial-row anchor insertion (B), and passage of suture limbs through cuff (C, D). The arthroscope is in the posterior port, viewing the bursa in a left shoulder.
Arthroscopy Techniques 2016 5, e717-e724DOI: ( /j.eats )
Copyright © 2016 Arthroscopy Association of North America Terms and Conditions

3. Fig 2
Rotator cuff repair: medial row. The technique is performed with either 1 medial-row anchor with 4 passes through the torn tendon (A) or 2 medial row anchors with 8 passes through the torn tendon (B).
Arthroscopy Techniques 2016 5, e717-e724DOI: ( /j.eats )
Copyright © 2016 Arthroscopy Association of North America Terms and Conditions

4. Fig 3
Knots of the medial-row anchors (A) and measurement of the distance between the 2 tied knots (B). The arthroscope is in the posterior port, viewing the bursa in a left shoulder.
Arthroscopy Techniques 2016 5, e717-e724DOI: ( /j.eats )
Copyright © 2016 Arthroscopy Association of North America Terms and Conditions

5. Fig 4
Medial-row repair with 2 anchors. Suture ends 3 and 4 and suture ends 5 and 6 are cut.
Arthroscopy Techniques 2016 5, e717-e724DOI: ( /j.eats )
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6. Fig 5
Planning of augmentation. (A) If only 1 anchor is used, the distance between the suture 1 and 2 knot and the suture 3 and 4 knot (distance c) is measured. (B) If 2 medial-row anchors are used, the distance between the suture 1 and 2 knot and the suture 7 and 8 knot (distance c) is measured.
Arthroscopy Techniques 2016 5, e717-e724DOI: ( /j.eats )
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7. Fig 6
Preparation of augment. Distance a must be at least 5 mm, distance b must be at least 10 mm, and width (w) must be at least 2 cm.
Arthroscopy Techniques 2016 5, e717-e724DOI: ( /j.eats )
Copyright © 2016 Arthroscopy Association of North America Terms and Conditions

8. Fig 7
Forming of owl-shaped augment. First, the corners are cut so that one is left with an octagon. Then, an inverted triangular cut is made along the top border of the augment.
Arthroscopy Techniques 2016 5, e717-e724DOI: ( /j.eats )
Copyright © 2016 Arthroscopy Association of North America Terms and Conditions

9. Fig 8
Suture passage through the augment before the augment is inserted. Suture ends 3 and 4 are passed through the posterior hole on the augment. Suture ends 1 and 2 are passed through the anterior augment hole. These are performed outside the patient. The top surface and the medial end of the augment are marked so that orientation becomes easier once the augment is in the bursa.
Arthroscopy Techniques 2016 5, e717-e724DOI: ( /j.eats )
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10. Fig 9
Passage and securing of augment. Suture ends 3 and 4 (if 1 medial-row anchor is used) or suture ends 7 and 8 (if 2 medial-row anchors are used) are passed through the posterior hole on the augment. Suture ends 1 and 2 are passed through the anterior augment hole.
Arthroscopy Techniques 2016 5, e717-e724DOI: ( /j.eats )
Copyright © 2016 Arthroscopy Association of North America Terms and Conditions

11. Fig 10
Passage and securing of augment. (A) The augment is rolled over itself and is pushed through the lateral portal cannula as the suture ends are tensioned outside. (B) Once the augment is inside, it is laid open and flat. (C) Medial anchor suture limbs are brought out over the augment and are then passed through 2 lateral-row anchors. (D) The augment is secure by insertion of the lateral-row anchors. The arthroscope is in the posterior port, looking at the bursa in a left shoulder. The patient is in the lateral position but the arthroscope is orientated so that the superior part of the image presents the superior part of the patient.
Arthroscopy Techniques 2016 5, e717-e724DOI: ( /j.eats )
Copyright © 2016 Arthroscopy Association of North America Terms and Conditions

12. Fig 11
Secured augment at end of procedure. The arthroscope is in the posterior port (A) or in the lateral port (B), looking at the bursa in a left shoulder.
Arthroscopy Techniques 2016 5, e717-e724DOI: ( /j.eats )
Copyright © 2016 Arthroscopy Association of North America Terms and Conditions