The Relationship of the Canine Femoral Head to the Femoral Neck: An Anatomic Study with Relevance for Hip Arthroplasty Implant Design and Implantation

Abstract

Correlations between observers were moderately strong or strong for 8 of 10 measurements. Specimen positioning was repeatable. The offset ratios indicate that dogs have a substantial cranial and ventral offset of the femoral head from the femoral neck.

Repeatability and Reproducibility of Measurements of Femoral and Tibial Alignment Using Computed Tomography Multiplanar Reconstructions

“…The mean estimates of aLDFA (96.2°), AA (26.6°), mMPTA (90.5°), and TTD (1.1°), were similar to those previously reported. The mean CTA was 4.6° but there are no reports for comparison.…”

“…We also presented the variability of measurements as the distribution of group ranges, which provides a descriptive representation of the within and between observer differences in the measurement of each parameter. Protocols using measurements made from photographs of anatomic specimens have been considered the gold standard with which the repeatability, reproducibility, and accuracy of radiographic and CT measurements have been compared . Positioning error has been examined in an anatomic study of various femoral head and neck parameters using photographs of anatomic specimens .…”

“…Protocols using measurements made from photographs of anatomic specimens have been considered the gold standard with which the repeatability, reproducibility, and accuracy of radiographic and CT measurements have been compared. 16,24,25,27 Positioning error has been examined in an anatomic study of various femoral head and neck parameters using photographs of anatomic specimens. 27 The investigators found a mean (standard deviation) positioning error of 0.93°( 1.93°) in the frontal plane and 2.39°(1.3°) in the sagittal plane, demonstrating that positioning error can occur even in gold standard anatomic studies.…”

Kangal ve Alman Çoban Köpeklerinin Proximal Femur Bölümünde Cavum Medullare’nin Geometrik Özellikleri

“…Because, the close adaptation of the prosthesis to the bone is essential to achieving optimal mechanical stability and fixation for THA (Casper et al, 2012;Ganz et al, 2010;Umer et al, 2010;Yang et al, 2014) The morphometric method to understand the shape and size of the proximal femur regarding femoral stem design was firstly described in detail by Noble et al (1988) in human femur. In this method, to understand the proximal femoral morphology with relevance for THA, the position of the femoral head and the geometrical variations in the medullary canal should be evaluated in particular (Franklin et al, 2012;Husmann et al, 1997;Noble et al, 1988;Noble et al, 2003;Palierne et al, 2008;Tawada et al, 2015;Yang et al, 2014). The position of femoral head or neck of the dog has already been studied in detail (Dudley et al, 2006;Franklin et al, 2012;Kuo et al, 1998;Madsen and Svalostaga, 1994;Palierne et al, 2006;Palierne et al, 2008;Rumph and Hathcock, 1990;Sarierler, 2004;Tomlinson et al, 2007;Wigger et al, 2008).…”

“…In this method, to understand the proximal femoral morphology with relevance for THA, the position of the femoral head and the geometrical variations in the medullary canal should be evaluated in particular (Franklin et al, 2012;Husmann et al, 1997;Noble et al, 1988;Noble et al, 2003;Palierne et al, 2008;Tawada et al, 2015;Yang et al, 2014). The position of femoral head or neck of the dog has already been studied in detail (Dudley et al, 2006;Franklin et al, 2012;Kuo et al, 1998;Madsen and Svalostaga, 1994;Palierne et al, 2006;Palierne et al, 2008;Rumph and Hathcock, 1990;Sarierler, 2004;Tomlinson et al, 2007;Wigger et al, 2008). To the best of our knowledge there are incomplete data to evaluate variations in the geometry of the medullary canal of proximal femur in dog.…”