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Objectives:
Biomechanics of the canine elbow joint are not fully understood. Evaluation of in vivo contact and load distribution within the elbow is crucial to understand the pathomechanism of biomechanical overload which might lead to medial coronoid process disease (MCPD).
Methods:
Six 3D CT-based bone model animations based on in vivo biplanar fluoroscopic movies were used. In these animations distance between the subchondral bone surface of humerus and ulna was calculated and mapped on the ulnar joint surface. The joint surface of the medial coronoid process (MCP) was separated from the remaining ulna and joint contact was measured along the MCP at three consecutive steps. Data was averaged and expressed as percent. Contact patterns were measured at three different time points – the end of swing phase (T0), at toe touch (T1) and mid stance phase (T2). Comparison between different time points was performed using paired t-test.
Results:
Total joint contact throughout the investigated gait cycle was 74.6% (SD: 15.3). Joint contact was 68.5% (SD: 17.2) at T0, 74.2% (SD: 16.3) at T1 and at 81.3% (SD: 18.3) at T2. Continuous increase of contact area from T0 to T2 was detected, but no significant difference was present between time points (T0 : T1 p = 0.391; T1 : T2 p = 0.218; T0 : T2 p = 0.083).
Conclusions:
In vivo humero-ulnar contact along the MCP increases during weight bearing. However, no significant difference occurs during the gait cycle, implying a homogenous load distribution. Further studies are needed including healthy elbows and elbows with MCPD.
34th Annual Scientific Meeting proceedings
Stream:
|
Session: Short Communications
Date/Time: 06-07-2024 (17:15 - 17:30) | Location: Auditorium 5
Date/Time: 06-07-2024 (17:15 - 17:30) | Location: Auditorium 5
Quantification of in vivo joint contact patterns of the medial coronoid process in healthy canine elbows
Rohwedder T*1, Böttcher P*2
1VALERA Medizinisches Kleintierzentrum, Berlin, Germany, 2Small Animal Clinic, Freie University, Berlin, Germany.
Objectives:
Biomechanics of the canine elbow joint are not fully understood. Evaluation of in vivo contact and load distribution within the elbow is crucial to understand the pathomechanism of biomechanical overload which might lead to medial coronoid process disease (MCPD).
Methods:
Six 3D CT-based bone model animations based on in vivo biplanar fluoroscopic movies were used. In these animations distance between the subchondral bone surface of humerus and ulna was calculated and mapped on the ulnar joint surface. The joint surface of the medial coronoid process (MCP) was separated from the remaining ulna and joint contact was measured along the MCP at three consecutive steps. Data was averaged and expressed as percent. Contact patterns were measured at three different time points – the end of swing phase (T0), at toe touch (T1) and mid stance phase (T2). Comparison between different time points was performed using paired t-test.
Results:
Total joint contact throughout the investigated gait cycle was 74.6% (SD: 15.3). Joint contact was 68.5% (SD: 17.2) at T0, 74.2% (SD: 16.3) at T1 and at 81.3% (SD: 18.3) at T2. Continuous increase of contact area from T0 to T2 was detected, but no significant difference was present between time points (T0 : T1 p = 0.391; T1 : T2 p = 0.218; T0 : T2 p = 0.083).
Conclusions:
In vivo humero-ulnar contact along the MCP increases during weight bearing. However, no significant difference occurs during the gait cycle, implying a homogenous load distribution. Further studies are needed including healthy elbows and elbows with MCPD.
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