Massimo Petrera1, Darrell J Ogilvie-Harris2, John S Theodoropoulos3, Jaskarndip Chahal2, David Wasserstein4, Christian Veillette5, Dorota Linda6, Tim Dwyer3. 1. Division of Orthopaedic Surgery, University of Ottawa, Ottawa, Canada. 2. University of Toronto Orthopaedic Sports Medicine (UTOSM) Program, Division of Orthopaedics, Toronto Western Hospital and Women's College Hospital, Toronto, Canada. 3. University of Toronto Orthopaedic Sports Medicine (UTOSM) Program, Division of Orthopaedics, Mount Sinai Hospital and Women's College Hospital, Toronto, Canada. 4. University of Toronto Orthopaedic Sports Medicine (UTOSM) Program, Division of Orthopaedics, Sunnybrook Health Sciences Centre, Toronto, Canada. 5. University of Toronto Orthopaedic Sports Medicine (UTOSM) Program, Division of Orthopaedics, Toronto Western Hospital, Toronto, Canada. 6. Joint Department of Medical Imaging, University of Toronto, Toronto, Canada.
Abstract
BACKGROUND: The accuracy of surgeons in utilizing the clock face method for anchor placement has never been investigated. Our hypothesis was that shoulder arthroscopy surgeons would be able to place suture anchors at predetermined positions with accuracy and reliability. METHODS: Ten cadaveric shoulders were used. Five fellowship-trained shoulder arthroscopy surgeons were directed to place a suture anchor at 3:30, 4:30, and 5:30 clock in two shoulders each. The position of the anchors was determined with computed tomography. The accuracy of placement was calculated and data analyzed with one-way analysis of variance. The intraclass correlation coefficients were calculated. RESULTS: The overall accuracy was 57%. The accuracy of anchor placement at the 3:30 position was 40% (average position 2:24 o'clock), it was 50% at the 4:30 position (average position 3:42 o'clock) and 80% at the 5:30 position (average position 5:03 o'clock). No statistical difference in accuracy between the placement of the superior, middle, and inferior anchors (p = 0.145) was seen. The intraclass correlation coefficient for inter-surgeon reliability was 0.4 (fair) while the intraclass correlation coefficient for intra-surgeon reliability was 0.6 (moderate). DISCUSSION: The findings of this study suggest a moderate degree of accuracy and fair to moderate inter- and intra-surgeon reliability when using the clock face system to guide anchor placement.
BACKGROUND: The accuracy of surgeons in utilizing the clock face method for anchor placement has never been investigated. Our hypothesis was that shoulder arthroscopy surgeons would be able to place suture anchors at predetermined positions with accuracy and reliability. METHODS: Ten cadaveric shoulders were used. Five fellowship-trained shoulder arthroscopy surgeons were directed to place a suture anchor at 3:30, 4:30, and 5:30 clock in two shoulders each. The position of the anchors was determined with computed tomography. The accuracy of placement was calculated and data analyzed with one-way analysis of variance. The intraclass correlation coefficients were calculated. RESULTS: The overall accuracy was 57%. The accuracy of anchor placement at the 3:30 position was 40% (average position 2:24 o'clock), it was 50% at the 4:30 position (average position 3:42 o'clock) and 80% at the 5:30 position (average position 5:03 o'clock). No statistical difference in accuracy between the placement of the superior, middle, and inferior anchors (p = 0.145) was seen. The intraclass correlation coefficient for inter-surgeon reliability was 0.4 (fair) while the intraclass correlation coefficient for intra-surgeon reliability was 0.6 (moderate). DISCUSSION: The findings of this study suggest a moderate degree of accuracy and fair to moderate inter- and intra-surgeon reliability when using the clock face system to guide anchor placement.
Authors: Dominic S Carreira; Augustus D Mazzocca; Jeremy Oryhon; Frederick M Brown; Jennifer K Hayden; Anthony A Romeo Journal: Am J Sports Med Date: 2006-05 Impact factor: 6.202
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