Radiologic, mechanical, and histologic evaluation of 2 glenoid prosthesis designs in a canine model

Wirth, Michael A.; Korvick, Donna L.; Basamania, Carl J.; Toro, Felipe; Aufdemorte, Thomas B.; Rockwood, Charles A.

doi:10.1067/mse.2001.112021

Cited by 89 publications

(52 citation statements)

References 34 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Symptomatic glenoid component loosening is the most common reason for revision surgery leading often to severe glenoid bony deficiencies (Stone et al, Antuna et al, 2001;Norris and Ianotti, 2002). This can be caused by unequal stress distribution as occurs in instability or absence of the rotator cuff or other causes like infection, inadequate primary bone stock, and poor initial fixation (Ibarra et al, 1998;Stone et al, 1999;Gartsman et al, 2000;Antuna et al, 2001;Wirth et al, 2001;Boileau et al, 2002;Godeneche et al, 2002;Lazarus et al, 2002;Bicknell et al, 2003;Nyffeler et al, 2003;Mileti et al, 2004;Gartsman et al, 2005). To improve this initial fixation precise knowledge of the glenoid geometry is essential.…”

Section: Discussionmentioning

confidence: 97%

The pillars of the scapula

2006

View full text Add to dashboard Cite

Total shoulder replacement has been shown to provide predictable pain relief and functional improvement in patients with glenohumeral arthritis. Loosening of the glenoid component remains the most frequent indication for revision surgery at long-term follow-up. The component most widely used is an all-polyethylene keeled or pegged design cemented to the glenoid cavity of the scapula. The glenoid is small and its cup-shaped morphology allows only a restricted site for limited fixation devices. This is particularly so in revision surgery where there are often large bony defects of the glenoid. In an anatomical study, we investigated the scapula in order to identify substantial bony pillars for better component fixation. Forty cadaveric shoulders (mean age 86, range 67-101) were dissected, the glenoids were denuded from cartilage, and the subchondral and cancellous bone was removed. Two bony pillars approaching the glenoid were consistently identified in all scapulae investigated. These pillars were outlined by three cortices and orientated to the circle formed by the rim of the inferior quadrants of the glenoid. One pillar is directed inferiorly near the margo lateralis and the other pillar is directed superiorly into the spine of the scapula. We defined these pillars in length and direction, and three-dimensionally located them in relation to the joint surface. This study demonstrated two bony pillars as important anatomical landmarks in the scapula. They were constant in presence, surgically accessible, and have not been described before. These results can be used as a guideline in the development of prosthetic designs to improve the fixation of glenoid components.

show abstract

Section: Discussionmentioning

confidence: 97%

The pillars of the scapula

2006

View full text Add to dashboard Cite

show abstract

“…[1][2][3][4] However, glenoid component loosening is one of the primary causes of failure. [10][11][12]16,20 Radiolucent lines at the bone-cement interface of the glenoid component are noted in 30% to 96% of cases. 1,2,4,[6][7][8] The appearance and progression of these radiolucencies appear to correlate with symptomatic component loosening.…”

mentioning

confidence: 98%

Survival and radiographic analysis of a glenoid component with a cementless fluted central peg

Groh¹

2010

Journal of Shoulder and Elbow Surgery

View full text Add to dashboard Cite

“…In their model, the component allowed for radiographically-proven and histologicallyproven bone growth between the radial fins of the peg used to anchor the glenoid component in bone. 37 A component for utilization in humans based upon the canine counterpart was designed and has been used extensively. Its central peg is similar to the canine model with respect to the radial fins, but the human component also has 3 peripheral pegs.…”

mentioning

confidence: 99%