scholarly journals Three-dimensional Quantification of Femoral Head Shape in Controls and Patients with Cam-type Femoroacetabular Impingement

2013 ◽  
Vol 41 (6) ◽  
pp. 1162-1171 ◽  
Author(s):  
Michael D. Harris ◽  
Shawn P. Reese ◽  
Christopher L. Peters ◽  
Jeffrey A. Weiss ◽  
Andrew E. Anderson
Keyword(s):  
Femoral Head ◽  
Femoroacetabular Impingement ◽  
Three Dimensional ◽  
Head Shape

scholarly journals Combination of anterior acetabular coverage and femoral head shape predicts femoroacetabular impingement after periacetabular osteotomy

2021 ◽  
Author(s):  
Shinya Hayashi ◽  
Shingo Hashimoto ◽  
Yuichi Kuroda ◽  
Tomoyuki Matsumoto ◽  
Tomoyuki Kamenaga ◽  
...  
Keyword(s):  
Femoral Head ◽  
Femoroacetabular Impingement ◽  
Periacetabular Osteotomy ◽  
Acetabular Coverage ◽  
Head Shape

Quantifying differences in femoral head and neck asphericity in CAM type femoroacetabular impingement and hip dysplasia versus controls using radial 3DCT imaging and volumetric segmentation

2020 ◽  
Vol 93 (1110) ◽  
pp. 20190039 ◽  
Author(s):  
Natalie Schauwecker ◽  
Yin Xi ◽  
Chenelle Slepicka ◽  
Riham Dessouky ◽  
Nicholas Fey ◽  
...  
Keyword(s):  
Femoral Head ◽  
Correlation Coefficient ◽  
Intraclass Correlation Coefficient ◽  
Femoroacetabular Impingement ◽  
Hip Dysplasia ◽  
Intraclass Correlation ◽  
Three Dimensional ◽  
Area Under The Curve ◽  
Α Angle ◽  
Volumetric Segmentation

Objective: Femoroacetabular impingement (FAI) and hip dysplasia are the most common causes of groin pain originating from the hip joint. To date, there is controversy over cut-off values for the evaluation of abnormal femoral head-neck anatomy with significant overlap between the normal and abnormal hips. Our aim was to perform three-dimensional CT analysis of femoral head and bump anatomy to quantify common hip pathologies (FAI and hip dysplasia) vs controls. Methods: Consecutive patients who underwent three-dimensional CT imaging for hip dysplasia or CAM type FAI were compared to asymptomatic controls. α angles on radial CT and 3D volumetric femoral head and bump segmentations were performed by two readers. Inter- and intrapatient comparisons were performed including interreader and receiver operating characteristic analyses. Results: 25 FAI patients, 16 hip dysplasia patients and 38 controls were included. FAI and dysplasia patients exhibited higher α angles and higher bump-head volume ratios than the controls (p < 0.05). Larger bump volumes were found among FAI than dysplasia patients and contralateral hips of FAI patients were also different than the controls. α angle at 2 o’clock and bump to head ratio showed the highest area under the curve for patients vs controls. The interreader reliability was better for volumetric segmentation (intraclass correlation coefficient = 0.35–0.84) as compared to the α angles (intraclass correlation coefficient = 0.11–0.44). Conclusion: Patients with FAI and dysplasia exhibit different femoral head anatomy than asymptomatic controls. Volumetric segmentation of femoral head and bump is more reliable and better demonstrates the bilateral femoral head anatomy differences in hip patients vs controls. Advances in knowledge: Utilizing information from 3D volumetric bump assessment in patients with FAI and dysplasia, the physicians may be able to more objectively and reliably evaluate the altered anatomy for better pre-surgical evaluation.

scholarly journals A rare case of osteoblastoma in the femoral head combined with cam-type femoroacetabular impingement: A case report

2020 ◽  
Vol 8 ◽  
pp. 2050313X2097802
Author(s):  
Akira Morita ◽  
Naomi Kobayashi ◽  
Hyonmin Choe ◽  
Taro Tezuka ◽  
Yusuke Kawabata ◽  
...  
Keyword(s):  
Femoral Head ◽  
Femoroacetabular Impingement ◽  
Bone Tumor ◽  
Arthroscopic Surgery ◽  
Three Dimensional ◽  
Football Player ◽  
Three Dimensional Model ◽  
Sports Activity ◽  
Image Inspection ◽  
Labral Injury

Osteoblastoma is a relatively rare benign bone-forming tumor accounting for less than 1% of all bone tumors. This report describes a patient with an osteoblastoma in the femoral head complicated by coexistence of femoroacetabular impingement. A 25-year-old male rugby football player complained of severe right hip pain after an injury during rugby practice. The pain became progressively worse despite resting from sports activity and rehabilitation for 4 months. The image inspection revealed bone tumor complicated by cam-type femoroacetabular impingement and a labral injury. Hip arthroscopic surgery was planned using a navigation system and a three-dimensional model for both complete debridement and cam resection. The tumor was resected by open surgery using a posterior approach. The bone tumor was diagnosed histopathologically as an osteoblastoma. The patient’s symptoms improved markedly after surgery, with no evidence of local tumor recurrence or hip arthritis 1 year later.

Three-dimensional virtual simulation and evaluation of the femoroacetabular impingement based on “black bone” MRA

2015 ◽  
Vol 135 (5) ◽  
pp. 667-671 ◽  
Author(s):  
Florian Radetzki ◽  
B. Saul ◽  
A. Hagel ◽  
T. Mendel ◽  
T. Döring ◽  
...  
Keyword(s):  
Femoroacetabular Impingement ◽  
Three Dimensional ◽  
Virtual Simulation ◽  
Simulation And Evaluation

scholarly journals Pigmented Villonodular Synovitis Causing Osteonecrosis of the Femoral Head: A Case Report

2013 ◽  
Vol 2013 ◽  
pp. 1-4 ◽  
Author(s):  
Tomohiro Mimura ◽  
Taku Kawasaki ◽  
Keitaro Yagi ◽  
Kanji Mori ◽  
Shinji Imai ◽  
...  
Keyword(s):  
Femoral Head ◽  
English Language ◽  
Three Dimensional ◽  
Pigmented Villonodular Synovitis ◽  
Villonodular Synovitis ◽  
X Ray ◽  
Bone Erosions ◽  
Computed Tomographic ◽  
Angiographic Image ◽  
Pigmented Villonodular

We report a case of a 27-year-old man with pigmented villonodular synovitis of the hip joint with coincident osteonecrosis of the femoral head. According to our review of the English-language literature, no detailed report of osteonecrosis of the femoral head complicated with pigmented villonodular synovitis has been published. Preoperative X-ray images showed joint narrowing and severe multiple bone erosions at the acetabulum and femoral neck. Magnetic resonance imaging revealed a low-intensity band attributable to osteonecrosis of the femoral head and massive diffuse pigmented villonodular synovitis lesions. Comparison of a three-dimensional computed tomographic image of this patient with an angiographic image of a normal individual demonstrated proximity of the pigmented villonodular synovitis-induced bone erosions to the medial and lateral femoral circumflex arteries and retinacular arteries, suggesting likely the compromise of the latter by the former. We propose that the massive pigmented villonodular synovitis may have contributed to the pathogenesis of osteonecrosis of the femoral head in this patient. We performed open synovectomy and total hip arthroplasty. No operative complications occurred, and no recurrence of the pigmented villonodular synovitis was detected for 3 years after the operation.

scholarly journals Pathohistologic Changes in Hip Tissues and Clinical-Morphologic Correlations in Diseases Complicated by Femoroacetabular Impingement Syndrome

2014 ◽  
Vol 21 (2) ◽  
pp. 67-73
Author(s):  
V. V Grigorovskiy ◽  
V. V Filipchuk ◽  
M. S Kabatsiy
Keyword(s):  
Femoral Head ◽  
Femoroacetabular Impingement ◽  
Hip Joint ◽  
Comparison Study ◽  
Acetabular Labrum ◽  
Aseptic Necrosis ◽  
Association Coefficient ◽  
Absolute Value ◽  
Femoroacetabular Impingement Syndrome ◽  
Fai Syndrome

The purpose of the work was to detect clinical-morphologic correlative dependences in patients with clinically marked femoroacetabular impingement (FAI) syndrome basing on the study of pathomorphologic changes in hip joint tissues, semiquantitative quantification of pathologic changes intensity, frequency analysis of their occurrence in nosologic groups of comparison. Study was performed on specimens of hip joint tissues - femoral head, acetabulum, acetabular labrum and joint capsule, resected during indicated corrective surgeries for femoral head aseptic necrosis and juvenile epiphysiolysis. Clinical-morphologic study revealed various pathologic changes: dystrophic-destructive, ischemic-necrotic and productive-inflammatory. In patients with FAI syndrome clinical and morphologic correlative dependences varied by absolute value, sign and degree of reliability of association coefficient parameters, i.e. groups of patients with certain nosologic units retained the peculiarities of rate and characteristics proportions in correlative dependences

scholarly journals Standard Radiographic Assessment of Femoral Cam Morphology is Influenced by Neck-Shaft Angle and Femoral Version

2020 ◽  
Vol 8 (7_suppl6) ◽  
pp. 2325967120S0039
Author(s):  
Layla Haidar ◽  
Ryan Warth ◽  
Erinn Pemberton Annie Waite ◽  
Alfred Mansour
Keyword(s):  
Femoral Head ◽  
Alpha Angle ◽  
Three Dimensional ◽  
Neck Shaft Angle ◽  
Incremental Change ◽  
Observer Reliability ◽  
Angle Measurements ◽  
Femoral Version ◽  
Shaft Angle ◽  
Head Neck

Objectives: Cam-type femoroacetabular impingement (FAI) is a three-dimensional (3D) deformity that is still difficult to assess using traditional two-dimensional (2D) radiographic views. While measurements of alpha angle and head-neck offset are used to estimate the likelihood of actual impingement, these 2D measurements do not account for z-axis variations in femoral version (FV) and neck-shaft angle (NSA). The purpose of this qualitative proof-of-concept study was to evaluate the potential variation in alpha angle and neck-shaft offset measurements with incremental changes in NSA and FV by simulating traditional radiographic views with software-generated Digitally-Reconstructed Radiographs (DRRs). We hypothesize that incremental changes in hip morphology will produce qualitative changes in alpha angle and neck-shaft offset. Methods: 3D-CT reconstruction images were obtained from one subject with symptomatic cam-type FAI. The 3D reconstruction was cleaned to include only the femoral head, neck and subtrochanteric region along with the ipsilateral hemipelvis. Using 3D medical image processing software (Mimics; Materialise, Inc.; Belgium), the pre-processed 3D model was manipulated in a standardized manner to simulate 5-degree incremental variations in FV and NSA (-15 degrees to +15 degrees for FV; -15 degrees to +10 degrees for NSA). Negative FV reflected external rotation of the femoral head-neck unit, whereas negative NSA reflected abduction of the femoral head-neck unit. Each modified 3D model was then used to generate DRRs corresponding to traditional 2D radiographic views used for assessment of cam-FAI (Anteroposterior [AP], False Profile [FP]), Cross Table Lateral [CTL], Frog Leg Lateral [FLL], 45- and 90-degree Dunn [45D and 90D, respectively]. Alpha angle and head-neck offset were measured on each radiographic view corresponding to each incremental change in FV and NSA. All measurements utilized the perfect circle technique and were made by two independent observers for assessment of inter-observer reliability. Two-way random effects ANOVA was used for statistical assessment of inter-observer reliability and reported as intra-class correlation coefficients (κ). Comparisons between groups were performed using two-tailed paired t-tests assuming unequal variance. P-values less than 0.05 were considered statistically significant. Results: Inter-observer reliability (κ) for head-neck offset and alpha angles were 0.46 (fair) and 0.88 (excellent), respectively. Variations in head-neck offset and alpha angle with incremental variations in FV and NSA are summarized in Figure 1. There were statistically significant changes in mean alpha angles when the NSA was adjusted from Neutral to -5 degrees (p=0.01) and from -5 degrees to -10 degrees (p<0.001). There were no statistically significant differences in alpha angles or head-neck offsets between each incremental change in FV (p<0.05). Alpha angle measurements were significantly more variable than head-neck offset measurements for all variations in FV (p<0.001) and NSA (p=0.02) (Figure 2). Conclusion: Two-dimensional evaluation of three-dimensional Cam morphology (alpha angle and head-neck offset) was found to be significantly affected by alterations in femoral version and head-neck offset. Head-neck offset measurements were significantly less variable than alpha angle measurements across all FVs and NSAs within each radiographic view. Future work should be done to develop standardized procedures for routine 3D radiographic assessment of cam-type FAI. [Figure: see text][Figure: see text]

scholarly journals 3D Printed Personalized Guide Plate in the Femoral Head Core Decompression

2020 ◽  
Vol 2020 ◽  
pp. 1-5
Author(s):  
Liangliang Cheng ◽  
Xing Qiu ◽  
Lei Yang ◽  
Chi Xiao ◽  
Baoyi Liu ◽  
...  
Keyword(s):  
Femoral Head ◽  
Three Dimensional ◽  
Core Decompression ◽  
Operation Time ◽  
Drill Hole ◽  
Needle Insertion ◽  
Pathological Examination ◽  
Anatomic Structure ◽  
Guide Plate ◽  
3D Printed

Objective. To investigate the feasibility of using 3D printed personalized guide plates in core decompression procedures for the treatment of osteonecrosis of the femoral head (ONFH). Methods. The clinical data of 8 patients undergoing femoral head core decompression from January to December 2019 were analyzed retrospectively. Three-dimensional (3D) images of the patients were reconstructed from the CT scan data taken preoperatively. From the data obtained, puncture position, drill hole, and depth were evaluated, and individualized 3D puncture guide plates were designed using Mimics 21.0 software. During the operation, the needle went through the hole of the guide plate, the depth of the drill was controlled, and the obtained bone tissues were sent for pathological evaluation. Intraoperative X-ray and postoperative pathological results were used to evaluate the success of the puncture. Results. The individualized guide plates used for core compression on the 8 patients were well fitted with the anatomic structure of the puncture site, and the direction and depth of the needle insertion were consistent with the preoperative design. The operation time was about 15-22 mins. The position of the decompression tunnel was the same as the designed plate. The postoperative pathology showed necrotic bone tissue. There were no postoperative complications such as infection, bleeding, and fracture. Conclusion. The 3D printed individualized guide plate can simplify core decompression and would make this procedure more accurate, safe, and quick, in addition to obtaining necrotic tissues for pathological examination.

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