Comparison between two- and three-dimensional methods for offset measurements after total hip arthroplasty

Tone, Shine; Hasegawa, Masahiro; Naito, Yohei; Wakabayashi, Hiroki; Sudo, Akihiro

doi:10.1038/s41598-022-16952-3

Cited by 6 publications

(7 citation statements)

References 37 publications

(39 reference statements)

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“…The main limitations of this study include its retrospective design, limited sample size, absence of a control group, high dropout rate, and two-dimensional (2D) radiological evaluation. Our previous study reports the usefulness and accuracy of the three-dimensional (3D) method, in line with previous reports [ 30 , 31 ]. In this study, no CT data was included.…”

Section: Discussionsupporting

confidence: 87%

Minimum 10-Year Results of Modular Metal-On-Metal Total Hip Arthroplasty

Wakabayashi

Hasegawa

Naito

et al. 2022

JCM

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Background: this study aimed to assess the long-term outcomes of (a minimum of 10-years) total hip arthroplasty with a metal-on-metal acetabular prosthesis. Methods: Eighty-nine primary total hip arthroplasties (82 patients) were performed using a Pinnacle modular metal-on-metal acetabular prosthesis. Clinical hip function outcomes were evaluated using the Japanese Orthopaedic Association hip score preoperatively and at the final follow-up. Radiological analysis was performed at the final follow-up and magnetic resonance imaging in all hips postoperatively. Results: Out of 82 patients, 17 were excluded who were followed up for <10 years. Of the remaining 65 patients (70 hips), 19 (20 hips) developed pseudotumors during 2–10 years postoperatively. After 10 and 13 years, the survival rates of revision endpoint were 93.6% and 90.4%, respectively. Clinical hip function outcomes had improved significantly at the final follow-up. In the radiological analysis, the mean cup angle of inclination and mean ratio of femoral offset on the operated hip to the contralateral hip was highest in patients with revision surgery for adverse reactions to metal debris. Conclusions: This study showed a 29.0% prevalence of pseudotumors. Some cases required revisions even after 10 years following surgery. Regular clinical surveillance is recommended for the early detection of adverse reactions to metal debris.

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Section: Discussionsupporting

confidence: 87%

Minimum 10-Year Results of Modular Metal-On-Metal Total Hip Arthroplasty

Wakabayashi

Hasegawa

Naito

et al. 2022

JCM

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“…Notably, our study findings were evaluated in the pelvis and femur and were realigned to a unified coordinate system. Similarly, several studies have stated that their parameters were measured using plain radiographs; therefore, FO is not accurately influenced by differences in the rotation of the hip joint [ 5 , 6 , 31 ]. Additionally, hip adduction and abduction also influence LLD and SGL.…”

Section: Discussionmentioning

confidence: 99%

The Sum of the Leg Length Discrepancy and the Difference in Global Femoral Offset Is Equal to That of the Contralateral Intact Side and Improves Postoperative Outcomes after Total Hip Arthroplasty: A Three-Dimensional Analysis

Imai,

Hirano,

Endo

et al. 2024

JCM

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Background/Objectives: Global femoral offset (GFO) and leg length discrepancy (LLD) affect outcomes after total hip arthroplasty (THA). Moreover, the sum of the difference in GFO between the THA and non-surgical sides and LLD (SGL) reportedly affects the outcomes in a two-dimensional evaluation. We examined the association of the GFO, LLD, and SGL with the Harris Hip Score (HHS) using a three-dimensional (3D) evaluation. Methods: We retrospectively surveyed 172 patients with hemilateral hip osteoarthritis who underwent THA. The GFO, LLD, and SGL were measured using the 3D pelvis and femur models; these models were adjusted for the pelvis and femur, and the coordinate systems were parallelized. Furthermore, their relationship with the modified HHS (mHHS) 1 year after THA was determined. Results: Significant correlations were found among mHHS, GFO, and SGL in the binomial group, whereas LLD was not significantly correlated. The optimal values of GFO and SGL were 1.01 mm and 0.18 mm/100 cm body height, respectively, which were considered optimal when the SGL values were approximately equal to those of the non-operative side. The optimal ranges for GFO and SGL were −1.65 to 3.67 mm and −4.78 to 5.14 mm/100 cm, respectively. Conclusions: Our findings were obtained after adjusting the pelvis and femur to a unified coordinate system. Therefore, the results of this study can be directly applied to 3D planning.

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“…Our study is notable in that both the pelvis and the femur were assessed by alignment to a certain coordinate system; to our knowledge, this was the first report using this 3D method. When the studied parameters are assessed using plain radiographs, FO may not be accurate because of the differences in hip rotation 5 . In addition, adduction and abduction of the hip can affect LLD.…”

Section: Discussionmentioning

confidence: 99%

“…Conversely, Esbjörnsson et al reported that pain and quality of life were improved, and Bonnin et al reported that the stress of the abductor muscles decreased when the acetabular component was placed slightly medially and the FO was enlarged 3 , 4 . Most of these reported outcomes are based on plain radiographs, which do not show the effects of hip internal and external rotation on FO 5 . In general, the FO is larger in internal rotation and smaller in external rotation; therefore, assessment by plain radiographs is not reproducible.…”

Section: Introductionmentioning

confidence: 99%

The association of postoperative global femoral offset with total hip arthroplasty outcomes

Hirano

Imai

Nozaki

et al. 2023

Sci Rep

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Global femoral offset (GFO) and femoral offset (FO) reportedly affect outcomes following total hip arthroplasty (THA). However, FO assessed using plain radiography is affected by internal and external rotations of the hip joint. We investigated the relationship between leg length discrepancy and Harris hip score (HHS), and their influence on acetabular offset (AO), FO, GFO, anterior femoral offset, and outcomes after THA. We retrospectively evaluated 140 patients with hip osteoarthritis who underwent THA. A three-dimensional (3D) pelvis and femur model created from computed tomography (data using ZedHip software was used to investigate these parameters. The modified (m)HHS scores were significantly improved from 49.0 to 88.8 in total mHHS, 20.0–44.5 in pain, and 28.9–44.4 points in function. Significant correlations were found between the differences in AO, FO, GFO, and pain score in binominal, with maximum values of − 1.24, + 1.54, and + 0.90 mm/100 cm body height, respectively. The maximum value of GFO and mHHS in binominal was + 1.17 mm/100 cm body height (BH). The optimal range of difference of GFO was − 1.75 to 4.09 mm/100 cm BH. This is the first report using a 3D method for assessing FO. Preoperative planning using the system could improve postoperative function.

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Comparison between two- and three-dimensional methods for offset measurements after total hip arthroplasty

Cited by 6 publications

References 37 publications

Minimum 10-Year Results of Modular Metal-On-Metal Total Hip Arthroplasty

Minimum 10-Year Results of Modular Metal-On-Metal Total Hip Arthroplasty

The Sum of the Leg Length Discrepancy and the Difference in Global Femoral Offset Is Equal to That of the Contralateral Intact Side and Improves Postoperative Outcomes after Total Hip Arthroplasty: A Three-Dimensional Analysis

The association of postoperative global femoral offset with total hip arthroplasty outcomes

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