Regional load bearing of the feline acetabulum

Moores, Alison; Moores, A. P.; Brodbelt, David; Owen, M. R.; Draper, E. R. C.

doi:10.1016/j.jbiomech.2004.04.035

Cited by 23 publications

(21 citation statements)

References 17 publications

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“…Therefore, future long-term investigation is still warranted to evaluate the incidence of implant loosening and gait pattern after uncemented and cemented THA in a larger population of dogs. Two previous studies evaluated the load bearing areas of the acetabulae in 5 healthy cats and 4 healthy dogs [33, 34]. The caudal and central regions of the acetabulae were fully and partially load bearing, respectively, during the physiological stance phase, whereas the cranial region was non-load bearing in the 5 healthy cats [33].…”

Section: Discussionmentioning

confidence: 99%

Radiographic evaluation of early periprosthetic acetabular bone contrast and prosthetic head acetabular coverage after uncemented and cemented total hip prosthesis in dogs

et al. 2016

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BackgroundCoxofemoral osteoarthritis is a chronic, disabling condition affecting people and dogs, with THA providing an excellent return to function in severely affected joints. The principal role of THA is to restore an adequate range of motion to the hip joint while transferring load from the acetabulum in order to improve the survival of the implant and enhance the limb function in the short and long terms. The objectives of the study reported here were, therefore, to radiographically evaluate periprosthetic acetabular bone GV and to assess prosthetic head acetabular coverage after 4 months of uncemented and cemented THA in dogs. Means periprosthetic acetabular GV for each and combined 3 regions of interest (zones 1, 2 and 3) were calculated immediately and 4 months after THA. Prosthetic head Norberg (PHN) angle was also measured to assess the degree of prosthetic head acetabular coverage after 4 months of surgery.ResultsZones 2 and 3 showed a significant increase in the mean bone GV after 4 months of uncemented THA. No differences in zones 1–3 after 4 months of cemented THA. Combined zones showed a significant increase in overall mean bone GV 4 months after uncemented THA; whereas, no changes were identified after 4 months of cemented THA. The PHN angles did not change after 4 months of uncemented and cemented THA and did not differ significantly between the 2 designs of hip arthroplasty.ConclusionsRegional periprosthetic acetabular bone GV varies with the design of THA. None of the designs showed periprosthetic acetabular bone lucency. No differences identified in the degree of prosthetic head acetabular coverage in both designs, indicating proper implant stability after 4 months of surgery. Further longer–term investigation on larger population is however still warranted.

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Section: Discussionmentioning

confidence: 99%

Radiographic evaluation of early periprosthetic acetabular bone contrast and prosthetic head acetabular coverage after uncemented and cemented total hip prosthesis in dogs

et al. 2016

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“…The goal of the present study is to describe quantitatively, by radiography assisted by digital image processing (DIP), the extent of textural changes of the trabecular network at the ilium and proximal femur in Sansuke, a bipedally trained macaque, compared to data for wild monkeys. As bone structure is highly correlated with habitual activity patterns, especially vigorous activity stimulated by unusual mechanical loadings (Biewener et al 1996;Turner 1998;Ruff et al 2006), and because bipedalism stresses the hip joint differently than during quadrupedalism (Dalstra and Huiskes 1995;Nakatsukasa et al 1995;Beck et al 2005), distinct site-specific structural differences are expected at the coxo-femoral hinge between trained and wild adult Japanese macaques (Macchiarelli et al 2001a; for the knee joint, see Richmond et al 2005). Notably, at the level of the ilium and of the proximal femoral end, we expect to detect (1) an alteration of the normal trabecular pattern as a whole, and (2) some site-specific reinforcements of the network along the ventral aspect of the ilium and the upper portion of the femoral neck expressed by means of strut thickening, cancellous bone densification, and increased anisotropy.…”

Section: Introductionmentioning

confidence: 99%

Textural characteristics of the iliac-femoral trabecular pattern in a bipedally trained Japanese macaque

et al. 2007

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Previous research has revealed that Japanese macaques (Macaca fuscata) trained in bipedal performance (Saru-mawashi) display a number of functionally related external skeletal changes, as well as some site-specific endostructural cortical and cancellous adaptations. Through radiography assisted by digital image processing, we investigated the trabecular pattern of the ilium and femoral neck of Sansuke, a macaque habitually bipedally trained for 8 years. A set of eight regions of interest on Sansuke were recorded for subtle structural characterization of the cancellous network and compared to a sample of 5 ilia and 23 femurs from 26 adult wild Japanese macaques. The measured variables include trabecular thickness, trabecular bone volume, and degree of anisotropy. As a whole, the site-specific textural characteristics of the cancellous network detected on the ilium and proximal femur of the bipedally trained macaque can be interpreted as functional adaptive responses to more compressive loads dissipated along the axis from the sacro-iliac to the coxo-femoral joint, and back.

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“…Historically, it has been recommended that fractures of the caudal third of the acetabulum do not need fixation. However, it has now been shown that the entire acetabulum is load bearing (not just the cranial two-thirds) (Beck and others 2005). Where possible, I would consider internal fixation of all acetabular fractures.…”

Section: Fracture Fixationmentioning

confidence: 99%

Dealing with pelvic fractures in cats

Grierson¹

2019

In Practice

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Pelvic fractures are common in cats and so veterinary surgeons will often be faced with having to manage this type of fracture. Historically, there has been a tendency to say that cats do fine if you just put them on cage rest for six weeks; however, this is outdated and old fashioned advice. There is no doubt that surgery gives a more predictable, comfortable outcome, and a quicker return to function for cats than would be seen with conservative management. This article provides a guide to the decision-making process around pelvic fractures in cats and the available options for fixation.

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Regional load bearing of the feline acetabulum

Cited by 23 publications

References 17 publications

Radiographic evaluation of early periprosthetic acetabular bone contrast and prosthetic head acetabular coverage after uncemented and cemented total hip prosthesis in dogs

Radiographic evaluation of early periprosthetic acetabular bone contrast and prosthetic head acetabular coverage after uncemented and cemented total hip prosthesis in dogs

Textural characteristics of the iliac-femoral trabecular pattern in a bipedally trained Japanese macaque

Dealing with pelvic fractures in cats

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