Figure 1 - uploaded by Augustine Uche Agu
Content may be subject to copyright.
Knee incision providing access to the cadaveric knee
Source publication
Background:
In spite of its consideration as a very successful procedure nearly all total knee replacement (TKR) prostheses were designed based on the parameters of male 4,Western, and primarily white native knees. Mismatch between prosthesis and bone surface or malposition can lead to poor outcome of TKR.
Aim:
To determine the parameters of the...
Contexts in source publication
Context 1
... para-patella longitudinal incision about 15 cm long [ Figure 1] was made three finger breadth proximal to the patella extending down to a finger breadth medial to the tibia tubercle and the knee exposed by deeper dissections along the same incisional line separating the junction between the rectus femoris and vastus medialis proximally. The cadaver knees were flexed and soft tissues dissected away to expose the articular surfaces of the distal femur and the proximal tibia. ...
Context 2
... para-patella longitudinal incision about 15 cm long [ Figure 1] was made three finger breadth proximal to the patella extending down to a finger breadth medial to the tibia tubercle and the knee exposed by deeper dissections along the same incisional line separating the junction between the rectus femoris and vastus medialis proximally. The cadaver knees were flexed and soft tissues dissected away to expose the articular surfaces of the distal femur and the proximal tibia. ...
Similar publications
Fibre metal laminates (FMLs), as a class of hybrid material taking advantages of both metals and composites, have shown great promise as lightweight structural materials in the transportation industry. Accordingly, manufacturing technologies of FMLs are attracting increasing research interests. This review emphasises the developing technologies of...
Fibre metal laminate (FML, GLARE©) materials, consisting of alternating layers of thin aluminium sheets and glass fibre prepregs, can be used for aircraft structure parts. For optimal structural properties and weight, large aluminium sheet sizes are desirable, making manual handling of the parts difficult. This paper introduces a software toolchain...
Citations
... For tibia, seven parameters were taken. [8] 1. Anteroposterior measurements of superior articular surface of medial condyle (TMAP): The maximum distance between anterior and posterior borders of superior articular surface of medial condyle. (Fig.2-a). ...
Background: Upper end of tibia and lower of femur form tibiofemoral joint. Accurate morphometric data of this joint are very important in designing total knee joint replacement prosthesis and can be used to guide treatment and monitor outcome of total knee replacement surgeries. The aim of present study is to assess different osteometric parameters of condylar and intercondylar surface of tibia and femur. Materials and Methods: The study was conducted on 30 femur dry bones and 56 dry tibia bones. Out of 30 femur bone, 15 were of left side and 15 were of right side, while 28 dry tibia bones out of 56 were of left side and 28 of right side. Six parameters for distal femur, and for proximal tibia seven parameters were taken. Results: It was found that both anteroposterior and transverse measurement were greater (r-0.11 & p-value 0.01).) in medial condyle on both sides whereas, anteroposterior and transverse measurement of lateral femoral condyle of both the sides were greater (r-0.33
... An appropriate prosthesis size that matches the resected bony surfaces is considered a crucial factor for success in total knee arthroplasty (TKA) [1,2]. If the prosthesis underhangs the resected surface of the bone, it may cause early subsidence and loosening of the prosthesis, whereas an overhang may cause residual pain, poor knee flexion, and decreased functional results [3,4]. Thus, it is important to maximize coverage of the knee component on the resected bony surface to ensure a good clinical result and long-term survivorship of the prosthesis [5,6]. ...
Background
There is a paucity of data concerning the morphological differences of resected distal femurs and proximal tibias in osteoarthritic (OA) and normal knees. The objective of this study was to determine whether morphometric differences in the surfaces of resected distal femurs and proximal tibias exist between OA and normal knees in a Chinese population.
Methods
Ninety-four OA knees and ninety-five normal knees were evaluated in Chinese individuals. Computed tomography was used to measure the femoral mediolateral (fML), medial anteroposterior (fMAP), lateral anteroposterior (fLAP), medial condylar width (fMCW), lateral condylar width (fLCW), medial posterior condylar curvature radii (fMCR), lateral posterior condyle curvature radii (fLCR), fML/fMAP aspect ratio, tibial mediolateral (tML), middle anteroposterior (tAP), medial anteroposterior (tMAP), and lateral anteroposterior (tLAP) tML/tMAP aspect ratio to determine the morphologic differences between OA and normal knees.
Results
The average fMCW and tMAP dimensions of OA knees were larger than those of normal knees in both male and female (p <0.05). The fMAP/fML aspect ratio and tMAP/tML aspect ratio were also significantly different in both sexs (p <0.05). OA knees have an oval-shaped distal femur with a wider ML length and more spherical-shaped proximal tibiae with relatively narrow ML dimensions.
Conclusions
The study revealed the morphological differences in fMCW, tMAP, fMAP/fML and tMAP/tML between OA and normal knees in both males and females. These findings may provide guidelines that can be used to design better knee implants that are more size-matched for OA knees.
Background
The patella is also known as the kneecap. It lies in front of the knee joint and protects the joint from damage. It is the largest sesamoid bone in the body and is embedded within the quadriceps tendon. The morphometry of the patella is crucial in forensic analysis, designing of implants, and subsequent reconstruction procedures in the knee as it is a sesamoid bone, without periosteum, whereby the natural healing process becomes difficult. The dimensions of the implant are very crucial for a successful knee replacement procedure. This study aims to provide a comprehensive morphometric analysis of the patella and further compare the same between right and left-sided patella specimens.
Methodology
In total, 50 dry patella specimens, with 26 left-sided specimens and 24 right-sided specimens, were obtained for the study from the Department of Anatomy, Saveetha Medical College, Chennai. The parameters analyzed in the study included height, width, the thickness of the patella, length and width of the articular facets on medial and lateral aspects, and central ridge length.
Results
The morphometric analysis showed the mean height, width, and thickness of patella specimens were 4.07 cm, 4.12 cm, and 2.03 cm, respectively. The dimensions of the articular facet on the lateral aspect were found to show statistical variation compared to the dimensions of the medial articular facet, where p-values of <0.05 were taken as statistically significant. Based on Koyunco’s Classification, 92% of patella specimens were of Type B.
Conclusions
The morphometric analysis of the patella in this study can be helpful in designing implants for reconstruction and for treating orthopedics in patellar reconstruction and fixation procedures.
