Effects of Internal Fluid Pressure on Stresses in Subchondral Bone Cysts of the Medial Femoral Condyle

2022 ◽  
Author(s):  
Nolan M. Norton ◽  
Elizabeth Santschi ◽  
Kenneth J. Fischer
Keyword(s):  
Subchondral Bone ◽  
Femoral Condyle ◽  
Fluid Pressure ◽  
Medial Femoral Condyle ◽  
Bone Cysts ◽  
Internal Fluid ◽  
Subchondral Bone Cysts

Impact of Size and Shape of Equine Femoral Subchondral Bone Cysts With a Transcondylar Screw on Predicted Bone Formation Area in a Finite Element Model

2020 ◽  
Vol 142 (6) ◽  
Author(s):  
Lance L. Frazer ◽  
Elizabeth M. Santschi ◽  
Scott J. Ring ◽  
Ross E. Hewitt ◽  
Kenneth J. Fischer
Keyword(s):  
Finite Element ◽  
Bone Formation ◽  
Subchondral Bone ◽  
Femoral Condyle ◽  
Element Model ◽  
Bone Cysts ◽  
Bone Apposition ◽  
Element Analysis ◽  
Subchondral Bone Cysts ◽  
Secondary Injuries

Abstract Equine subchondral bone cysts (SBCs) develop most often in the medial femoral condyle (MFC) of yearlings intended for performance. SBCs often cause lameness and can cause secondary injuries to the meniscus and tibial cartilage. A novel surgical technique using a transcondylar lag screw (TLS) across an MFC SBC has shown success in lameness resolution and radiographic healing of MFC SBC. In a previous study using finite element analysis, our lab showed that a TLS stimulated bone formation on the inner surface of the SBC and altered third principal stress vectors to change the direction of surface compression to align with the screw axis. This work extended the previous study, which was limited by the use of only one idealized SBC. Our objective was to test SBCs of several sizes and shapes in a newly developed equine stifle FEM with a TLS to determine how cyst size affects bone formation stimulation. This study found that a transcondylar screw is most effective in stimulating bone formation in cysts of greater height (proximal-distal). The TLS increases stress stimulus in the bone around the cyst to promote bone apposition and directs compression across the cyst. If full penetration of the screw through the cyst is possible, it is recommended that the transcondylar screw be used to treat subchondral bone cysts. For the treatment of smaller cysts that are not accessible by the current screw surgical approach, future work could study the efficacy of a dual-pitch headless screw that may reach smaller cysts.

scholarly journals Knee subchondroplasty for management of subchondral bone cysts: a novel treatment method

2021 ◽  
Vol 62 (9) ◽  
pp. 492-496
Author(s):  
GJ Zeng ◽  
FS Foong ◽  
DTT Lie
Keyword(s):  
Subchondral Bone ◽  
Femoral Condyle ◽  
Weight Bearing ◽  
Bone Allograft ◽  
Treatment Method ◽  
Bone Cysts ◽  
Synthetic Bone Substitute ◽  
Good Pain Relief ◽  
Subchondral Bone Cysts ◽  
Minimally Invasive Methods

Knee subchondroplasty (SCP) is one of the most novel minimally invasive methods for treating bone marrow lesions. The literature suggests that it is safe, with few complications and good outcomes. However, no studies have documented its usage for managing large subchondral bone cysts. This article outlines a case report and details the pearls and pitfalls of SCP in treating large subchondral bone cysts. Our patient underwent arthroscopic debridement with medial femoral condyle SCP. Mild posterior extravasation of synthetic bone substitute was observed on Postoperative Day 1, which was immediately rectified on revision arthroscopy. Gradual escalation of weight bearing and good pain relief were subsequently achieved, and the patient has remained complication-free after two years. No further extravasation were observed on repeat radiography. SCP is a feasible temporising measure that may help to delay the need for bone allograft or immediate knee arthroplasty in younger patients while retaining function and delaying loss of productivity.

scholarly journals The association between subchondral bone cysts and tibial cartilage volume and risk of joint replacement in people with knee osteoarthritis: a longitudinal study

2010 ◽  
Vol 12 (2) ◽  
pp. R58 ◽  
Author(s):  
Stephanie K Tanamas ◽  
Anita E Wluka ◽  
Jean-Pierre Pelletier ◽  
Johanne Martel-Pelletier ◽  
François Abram ◽  
...  
Keyword(s):  
Longitudinal Study ◽  
Knee Osteoarthritis ◽  
Subchondral Bone ◽  
Joint Replacement ◽  
Cartilage Volume ◽  
Bone Cysts ◽  
Tibial Cartilage ◽  
Subchondral Bone Cysts

Curettage of subchondral bone cysts in medial femoral condyles of the horse

2010 ◽  
Vol 20 ◽  
pp. 120-124 ◽  
Author(s):  
N. A. WHITE ◽  
C. W. McILWRAITH ◽  
D. ALLEN
Keyword(s):  
Subchondral Bone ◽  
Bone Cysts ◽  
Subchondral Bone Cysts ◽  
Femoral Condyles
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