A 3D Femoral Head Coverage Metric for Enhanced Reliability in Diagnosing Hip Dysplasia

SummaryThe prevalence of rotation of the pelvis along its length axis was noted, as was the number of rotations towards the right or left hand side of the dog, on 7,012 conventional hip extended radiographs, which were sent for official screening. 29.8% of the radiographs showed a rotation the pelvis. The rotation was statistically more frequent towards the left hand side of the dog. The number of rejected radiographs for too important pelvis rotation was only 5.2%. The consequences of the pelvis rotation on the Norberg-Olsson angle, on the dorsal femoral head coverage, and in the aspect of cranial acetabular edge have to be taken into account when scoring the dog for hip dysplasia.

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Canine Femoral Neck Lengthening Combined with DARthroplasty to Manage Severe Canine Juvenile Hip Dysplasia: A Case Report

VCOT Open ◽

10.1055/s-0039-1694036 ◽

2019 ◽

Vol 02 (02) ◽

pp. e25-e29

Author(s):

Massimo Petazzoni ◽

Melania Dallago

Keyword(s):

Case Report ◽

Femoral Head ◽

Femoral Neck ◽

Hip Dysplasia ◽

Case Description ◽

Femoral Head Coverage ◽

Design Case ◽

Hip Luxation ◽

Acetabular Rim

Objective This study is a case description of femoral neck lengthening and dorsal acetabular rim (DAR) arthroplasty to treat severe hip luxation in a 5-month-old male Cocker Spaniel (14.3 kg) and to compare the clinical outcome with that of contralateral femoral neck excision. Study design Case report. Results Femoral head coverage improved after surgery (preoperative lateralization of the centre of the femoral head with regard to the dorsolateral acetabular rim: 10 mm; postoperative lateralization of the centre of the femoral head: –1.3 mm). The postoperative Barden's test was negative. The dog was bearing weight 2 weeks postoperatively. Radiographic signs of bone healing were present at the 6-week follow-up examination. No complications were detected. Conclusions Femoral neck lengthening and DAR augmentation were performed in a growing dog affected by severe hip luxation and DAR insufficiency.

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Comparison of 2.5D and 3D Quantification of Femoral Head Coverage in Normal Control Subjects and Patients with Hip Dysplasia

PLoS ONE ◽

10.1371/journal.pone.0143498 ◽

2015 ◽

Vol 10 (11) ◽

pp. e0143498 ◽

Cited By ~ 7

Author(s):

Hui Cheng ◽

Li Liu ◽

Weimin Yu ◽

Hong Zhang ◽

Dianzhong Luo ◽

...

Keyword(s):

Femoral Head ◽

Normal Control ◽

Hip Dysplasia ◽

Femoral Head Coverage ◽

Control Subjects

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Chiari pelvic osteotomy in treatment of hip dysplasia

Srpski arhiv za celokupno lekarstvo ◽

10.2298/sarh1310710s ◽

2013 ◽

Vol 141 (9-10) ◽

pp. 710-714 ◽

Cited By ~ 1

Author(s):

Nemanja Slavkovic ◽

Zoran Vukasinovic ◽

Milan Apostolovic ◽

Boris Vukomanovic

Keyword(s):

Femoral Head ◽

Distal Part ◽

Hip Dysplasia ◽

Young Patients ◽

Pelvic Osteotomy ◽

Femoral Head Coverage ◽

Developmental Hip Dysplasia ◽

Chiari Osteotomy ◽

Chiari Pelvic Osteotomy

Chiari pelvic osteotomy is a surgical procedure having been performed for almost sixty years in patients with the insuffcient coverage of the femoral head. It is most frequently used in young patients with dysplastic acetabular sockets as a part of developmental hip dysplasia. Even though performance of the Chiari osteotomy is associated with positive therapeutical results, above all, its main goal is to delay inevitable degenerative changes. Original surgical technique has been modified and improved over time. Nevertheless, the basic idea has remained unchanged - increasing of the femoral head coverage by medial displacement of the distal part of the pelvis along with capsular interpositioning. Given the complexity of operation, the complication percentage is rather low. Chiari pelvic osteotomy has lost its actuality and importance during this past six decades. The role of Chiari pelvic osteotomy has been considerably taken over by other more efficient and more lasting surgical procedures. Nonetheless, Chiari pelvic osteotomy is still present in modern orthopedic practice, above all as ?salvage? osteotomy.

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The association between femoral neck shaft angle and degenerative disease of the hip in a cadaveric model

Hip International ◽

10.1177/11207000211013029 ◽

2021 ◽

pp. 112070002110130

Author(s):

Leigh-Anne Tu ◽

Douglas S Weinberg ◽

Raymond W Liu

Keyword(s):

Femoral Head ◽

Femoral Neck ◽

Hip Osteoarthritis ◽

Volume Ratio ◽

Femoral Head Coverage ◽

Neck Shaft Angle ◽

Hip Arthritis ◽

Femoral Version ◽

Shaft Angle ◽

The Impact

Background: While the influences of acetabular dysplasia and overcoverage on hip arthritis have been studied, the impact of femoral neck-shaft angle on hip arthritis is much more poorly understood. The purpose of this study is to determine if a relationship exists between neck shaft angle and the development of osteoarthritis, a better understanding of which would be useful to surgeons planning osteotomies about the hip. Methods: 533 cadaveric femora and acetabulae (1066 total) from the Hamann-Todd Osteological Collection (Cleveland, OH) were acquired. We measured true neck shaft angle using an AP photograph with the femoral neck parallel to the table. Femoral head volume to acetabular volume ratio, representing femoral head coverage, as well as femoral version were utilised. Correlation between neck shaft angle, femoral version, femoral head coverage and osteoarthritis were evaluated with multiple regression analysis. Results: The mean age and standard deviation was 56 ± 10 years. There were 64 females (12%) and 469 males. There were 380 Caucasians (71%) and 153 African-Americans. Mean femoral version was 11° ± 12° and mean true neck shaft angle was 127.7° ± 5.9° There was a strong correlation between age and arthritis (standardised beta 0.488, p < 0.001). There was a significant correlation between increasing true neck shaft angle and decreasing hip arthritis (standardised beta -0.024, p = 0.038). In the femoral head overcoverage subset, increasing true neck shaft angle was still significantly associated with decreasing hip arthritis (standardised beta −0.088, p = 0.018), although this relationship was not significant with femoral head undercoverage subset. Conclusions: With sufficient acetabular coverage, a relative increase in femoral neck shaft angle within the physiologic range is associated with decreased hip osteoarthritis. Clinical relevance: An understanding of the relationship between femoral neck shaft angle and hip osteoarthritis could be useful for surgeons planning pelvic or proximal femur osteotomies in children.

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LOW DOSE CT SCAN FOLLOWING PERIACETABULAR OSTEOTOMY: ASSESSMENT OF REDUCTION AND CORRELATION WITH RADIOGRAPHIC MEASURES

Orthopaedic Journal of Sports Medicine ◽

10.1177/2325967120s00213 ◽

2020 ◽

Vol 8 (4_suppl3) ◽

pp. 2325967120S0021

Author(s):

Clarabelle DeVries ◽

Jeffrey J Nepple ◽

Lucas Fowler ◽

Sean Akers ◽

Gail Pashos ◽

...

Keyword(s):

Femoral Head ◽

Normative Data ◽

Low Dose ◽

Periacetabular Osteotomy ◽

Femoral Head Coverage ◽

Edge Angle ◽

Center Edge ◽

Two Sectors ◽

Posterior Sector ◽

Center Edge Angle

Introduction: Periacetabular osteotomy (PAO) has become a favored treatment for symptomatic acetabular dysplasia worldwide. Nevertheless, the parameters for optimal correction to avoid residual instability or iatrogenic impingement have not been defined. Purpose: The purposes of this study were (1) to assess the ability of PAO to correct femoral head coverage to normal ranges as measured by 3D CT scan and (2) to determine if postoperative radiographic parameters of dysplasia are accurate markers of optimal acetabular correction. Methods: A total of 43 hips (in 38 patients, mean 27.7 years, 88.4% female) were enrolled in this prospective cohort study at minimum 1 year after PAO. Postoperative femoral head coverage was assessed via low-dose CT and compared to normative data of asymptomatic hips from the literature. Anterior (3:00-1:15), lateral (1:00-11:00), and posterior (11:25-9:00) sector coverage was defined by averaging the coverage at 15 minute increments in each zone. Postoperative radiographs were utilized to measure lateral center edge angle (LCEA), anterior wall index (AWI), posterior wall index (PWI), and anterior center edge angle (ACEA). Good correction for each sector was defined as coverage from 1 SD below mean to 2 SD above mean. Results: Postoperatively, the anterior sector was normalized in 84% of hips, lateral sector in 84% of hips, and posterior sector in 86% of hips. Sixty-seven percent of hips were corrected to normative range in all three sectors and 19% were corrected in two sectors (86% in at least two sectors). LCEA and PWI showed the highest correlation with lateral and posterior sector coverage with Pearson’s correlation coefficients of 0.67 and 0.71 (p < 0.001), respectively. Weaker correlations were found between anterior coverage and the AWI and ACEA coverage (-0.16 and 0.15, respectively). Good correction was best correlated with the following target values for acetabular correction: LCEA 28°, AI 1°, AWI 0.37, ACEA 32°, and PWI 1.0. Conclusion: PAO can effectively normalize femoral head coverage compared to normative data. Good correction of each sector coverage ranged from 84-86% of cases. The proposed set of radiographic parameter targets were found to be reliable markers of femoral head coverage.

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The incidence of avascular necrosis of the healthy, contralateral femoral head at the end of the use of Pavlik harness in unilateral hip dysplasia

International Orthopaedics ◽

10.1007/s00264-006-0113-z ◽

2006 ◽

Vol 30 (5) ◽

pp. 348-351 ◽

Cited By ~ 10

Author(s):

Károly Pap ◽

Sándor Kiss ◽

Tamás Shiha ◽

Gábor Marton-Szücs ◽

György Szöke

Keyword(s):

Femoral Head ◽

Avascular Necrosis ◽

Hip Dysplasia ◽

Pavlik Harness

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Relationship of peroxidation indicators and hemograms in children with hip joint pathology

Russian Clinical Laboratory Diagnostics ◽

10.51620/0869-2084-2021-66-2-104-109 ◽

2021 ◽

Vol 66 (2) ◽

pp. 104-109

Author(s):

M. P. Teplen’kiy ◽

E. L. Matveeva ◽

E. S. Spirkina ◽

A. G. Gasanova

Keyword(s):

Lipid Peroxidation ◽

Femoral Head ◽

Hip Joint ◽

Hip Dysplasia ◽

Stage Ii ◽

Perthes Disease ◽

Antioxidant Protection ◽

Aseptic Necrosis ◽

Joint Pathology ◽

Group I

The increase in the number of patients with hip pathologies among children of different ages makes the diagnosis and treatment of these diseases one of the most actually existing problems in modern orthopedics. The aim of the work was to determine the features of the lipid peroxidation system - antioxidant protection and hemogram indices in children with various forms of hip joint pathology. The results of a preoperative examination of 47 patients aged 6-15 years (average age 10.3 years) who were treated at the clinic “FSBI NICC“ TO ”named after academician G. A. Ilizarova, Ministry of Health of the Russian Federation. There were 25 boys and 20 girls. Given nosology, patients were divided into five groups. The diagnosis was established on the basis of a clinical and radiological examination. Group I consisted of 8 male patients with stage II Perthes disease (mean age 8.75 + 1.63). Group II includes 16 patients (8 boys, 7 girls) with stage III Perthes disease. (average age 11.80 + 0.89). Group III included 12 patients (6 boys, 6 girls) with aseptic necrosis of the femoral head (average age 14.7 + 2.35). Group IV consisted of 4 patients (1 boy, 3 girls) with epiphyseal dysplasia. (average age 10.25 + 1.36). Group V includes 7 patients with hip dysplasia complicated by aseptic necrosis of the femoral head (mean age 8.33 + 2.11). The norm is the data that was obtained after examining 10 healthy male adolescents (age 13-14) and 5 female adolescents (age 8-14 years). Changes in lipid peroxidation rates and antioxidant activity are unidirectional in different forms of pathology of the hip joints in children, and the content of peroxidation products reliably correlates with hemogram values in stage II osteochondropathy and complicated hip dysplasia. In the complex of diagnostic measures for children with dystrophic lesions of the hip joint, to clarify the nature and stage of the pathological process, as additional criteria, hemogram indicators and lipid peroxidation systems - antioxidant protection can be used.

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