scholarly journals High varus stem alignment in short-stem total hip arthroplasty: a risk for reconstruction of femoro-acetabular offset, leg length discrepancy and stem undersizing?

2021 ◽  
Author(s):  
Matthias Luger ◽  
Julian Stiftinger ◽  
Jakob Allerstorfer ◽  
Rainer Hochgatterer ◽  
Tobias Gotterbarm ◽  
...  
Keyword(s):  
Total Hip Arthroplasty ◽  
Hip Arthroplasty ◽  
Short Stem ◽  
Leg Length ◽  
Total Hip ◽  
Press Fit ◽  
Group A ◽  
Leg Length Difference ◽  
Group B ◽  
Short Stems

Abstract Purpose Short stems are increasingly used in in total hip arthroplasty (THA) because of advantages in bone and soft tissue preservation and reconstruction of hip geometry. Short stems can be inserted in a more varus position compared to conventional straight stems. This poses the risk of final varus misplacement of the femoral component, which is not intended in all femoral short stems. Methods We wanted to evaluate the effect of a high varus stem positioning in MIS THA on hip offset, leg length and femoral canal fill index. A series of 1052 consecutive THAs with a singular cementless femoral short stem and press-fit cup was retrospectively screened for inclusion. One hundred six patients with unilateral THA and a contralateral healthy hip met the inclusion criteria. Measurements were carried out on preoperative and 3 months anterior–posterior postoperative radiographs. Patients were divided into Group A (varus stem alignment ≤ 3°) and Group B (varus stem alignment > 3°). Results Hip offset (HO) increased significantly in Group B by 4 mm (p = 0.013). No influence on leg length difference was detected in both groups. Preoperative CCD angle was significantly lower in Group B (p < 0.001). Canal Fill Indices (CFI) were significantly lower in Group B (CFI I: p < 0.001; CFI II p = 0.003; CF III p = 0.002). Conclusion High varus stem alignment > 3° leads to a statistically significant but minor increase in HO and poses the risk of stem undersizing. A preoperatively low genuine CCD angle pose a risk for varus stem positioning.

scholarly journals More than a feeling?—Overruling the preoperatively templated offset option leads to a minor offset increase in short stem total hip arthroplasty

2022 ◽  
Author(s):  
Matthias Luger ◽  
Christian Stadler ◽  
Rainer Hochgatterer ◽  
Jakob Allerstorfer ◽  
Tobias Gotterbarm ◽  
...  
Keyword(s):  
Total Hip Arthroplasty ◽  
Hip Arthroplasty ◽  
Short Stem ◽  
Leg Length ◽  
Digital Templating ◽  
Stem Size ◽  
Total Hip ◽  
Press Fit ◽  
A Minor ◽  
Short Stems

Abstract Purpose Short stems are increasingly used in total hip arthroplasty (THA) because of advantages in bone and soft tissue preservation and reconstruction of hip geometry. Digital templating is essential in determining the correct offset option and stem size in THA. However, the preoperative template sizes might be intraoperatively overruled. Patients and methods We evaluated the effect of intraoperative overruling of the preoperatively templated offset option of a short curved stem on hip offset, leg length, implant positioning, and femoral canal fill index. The overruling was performed in case of intraoperative instability, telescoping, or both. A series of 1052 consecutive THAs with a cementless short curved stem and press-fit cup was retrospectively screened. One hundred patients with unilateral THA and a contralateral native and morphologically healthy hip as a reference met the inclusion criteria. Measurements were carried out on preoperative and 3 months anterior–posterior postoperative radiographs. Patients were divided according to the overruling by offset option or stem size. Results Hip offset was increased in all groups, but only with significant increase if an offset option + 1 was used intraoperatively (p = 0.025). LLD was restored without significance in all groups (p = 0.323; p = 0.157). Conclusion Intraoperative overruling of the preoperative digital template in cementless short stem total hip arthroplasty results in an increase of hip offset compared to a contralateral healthy hip. However, the increase is marginal and clearly under 5 mm compared to the contralateral healthy hip.

The migration pattern and initial stability of the Optimys short stem in total hip arthroplasty: a prospective 2-year follow-up study of 33 patients with RSA

2020 ◽  
pp. 112070002090184 ◽  
Author(s):  
Sheryl de Waard ◽  
Inger N Sierevelt ◽  
Renee Jonker ◽  
Daniel Hoornenborg ◽  
Harm M van der Vis ◽  
...  
Keyword(s):  
Total Hip Arthroplasty ◽  
Hip Arthroplasty ◽  
Deep Infection ◽  
Migration Pattern ◽  
Short Stem ◽  
Leg Length ◽  
Total Hip ◽  
Initial Stability ◽  
Short Stems

Background and purpose: The consensus that bone stock preservation and optimal restoration of offset and leg length is important in total hip arthroplasty is now widespread, especially for young and active patients. Short stems seem promising in this aspect, though implant stability is still of concern. This study looked at the migration pattern of the Optimys short stem through RSA analysis. Patients and methods: 40 patients were included. RSA images were made directly postoperatively (within 5 days), at 6 weeks and at 3, 6, 12 and 24 months. Double examinations were made for precision measurement. HOOS and pain scores were obtained preoperatively and at 2 years. 4 patients were excluded due to protocol violation and 1 patient was excluded for RSA analysis with a CN number >110. 2 patients were lost to follow-up after 3 and 6 months ( n  = 1 lost, n  = 1 deep infection, respectively). Results: Mean age was 60 years with a mean BMI of 27. RSA analysis of 34 patients showed a significant initial median proximodistal translation (subsidence) of 0.21 mm (IQR 0.64–0.06) and anteversion-retroversion rotation of 0.59° (IQR 0.01–1.34) at 6 weeks, after which the stem stabilises and showed no further significant movement. Median migration in other directions was small. 4 patients had an initial subsidence of >2 mm, all showed secondary stabilisation. HOOS outcomes were satisfactory, with the domain symptoms and pain showing a median score of 95/100 at 2 years. Conclusions: After initial migration the Optimys achieves secondary stabilisation, suggesting low risk on long-term aseptic loosening. Clinical trials registration: NL47055.048.13.

scholarly journals Synchronous or sequential cementless bilateral total hip arthroplasty for osseous ankylosed hips with ankylosing spondylitis

2021 ◽  
Vol 22 (1) ◽  
Author(s):  
Ping Mou ◽  
Wei Nan Zeng ◽  
Yu Chen ◽  
Zongke Zhou
Keyword(s):  
Total Hip Arthroplasty ◽  
Clinical Outcomes ◽  
Hip Arthroplasty ◽  
Statistical Difference ◽  
Hip Dislocation ◽  
Radiographic Evaluation ◽  
Leg Length ◽  
Total Hip ◽  
Group A ◽  
Group B

Abstract Background Bilateral osseous ankylosed hips secondary to ankylosis spondylitis (AS) are relatively rare but impact the quality of life hugely. Cementless total hip arthroplasty (THA) for bilateral osseous ankylosed hips with AS is a challenging procedure. No previous literature compares the clinical outcomes of synchronous and sequential bilateral THA for these special patients. Methods 23 patients (46 hips) were retrospectively analyzed and divided into bilateral THA synchronously (group A) and sequentially (group B). The clinical measurement, radiological assessments, and complications were compared. Independent sample T test was used for data analysis. Results Harris Hip Scores (HHS) improved greatly for both groups (P = 0.58) as well as the range of motion (P = 0.64). But group B can realize shorter time (3.6 ± 1.2 days) to walk for the first time postoperatively (P = 0.02). Group A needed more blood transfusions (P = 0.028). For group A, no statistical difference was found in the bilateral inclination of cup (IC) (P = 0.48) and femoral offset (FO) (P = 0.07). For group B, no statistical difference was observed in bilateral IC (P = 0.37) but in bilateral FO (P = 0.04). Group A showed the fewer difference of bilateral IC (P = 0.02), while comparative measurements were found for two groups in the difference of bilateral FO (P = 0.78) and leg length discrepancy (P = 0.83). For both groups, the total hospital expense for each patient was similar and almost all patients were very satisfied with the outcomes. For group A, one patient encountered femoral fracture intraoperatively and another patient encountered hip dislocation and delay union of wound. 3 hips from group A and 3 hips from group B encountered heterotopic ossification. Conclusions Our retrospective research demonstrated that cementless bilateral THA was a reliable treatment for osseous ankylosed hip due to AS. Synchronous and sequential bilateral THA can realize similarly satisfactory clinical outcomes and radiographic evaluation.

Synchronous or sequential cementless bilateral total hip arthroplasty for osseous ankylosed hips with ankylosing spondylitis: a retrospective cohort study

2020 ◽  
Author(s):  
Ping Mou ◽  
Nan Wei Zeng ◽  
Yu Chen ◽  
Zongke Zhou
Keyword(s):  
Ankylosing Spondylitis ◽  
Total Hip Arthroplasty ◽  
Clinical Outcomes ◽  
Hip Arthroplasty ◽  
Hip Dislocation ◽  
Radiographic Evaluation ◽  
Leg Length ◽  
Total Hip ◽  
Group A ◽  
Group B

Abstract Purpose cementless total hip arthroplasty (THA) for bilateral osseous ankylosed hips with ankylosing spondylitis (AS) is a challenging procedure. No literature compares the clinical outcomes of synchronous and sequential bilateral THA of these special patients. Methods 23 patients (46 hips) were retrospectively analyzed and classified into receiving bilateral THA synchronously (group A) and receiving bilateral THA sequentially (group B). The clinical measurement, radiological assessments and complications were compared. Independent sample T test were used for data analysis. Results Harris Hip Scores (HHS) improved greatly for both groups (P = 0.58) as well as the range of motion (P = 0.64). But group B can realize shorter time (3.6 ± 1.2 days) to walk for the first time postoperatively (P = 0.02). The group A need more blood transfusions (P = 0.028). For group A, no statistic difference was found in bilateral inclination of cup (IC) (P = 0.48) and femoral offset (FO) (P = 0.07). For group B, no statistic difference was observed in bilateral IC (P = 0.37) but in bilateral FO (P = 0.04). The group A showed fewer difference of bilateral IC (P = 0.02), while comparative measurements for two groups in the difference of bilateral FO (P = 0.78) and leg length discrepancy (P = 0.83). For group A, one patient encountered femoral fracture intraoperatively and one patient encountered hip dislocation and delay union of wound as well as three hips encountering heterotopic ossification (HO). For group B, only three hips encountered HO. Conclusion Cementless bilateral THA was a safe and effective technique to improve hip function for patients diagnosed with osseous ankylosed hip due to AS. Synchronous bilateral THA can realize good clinical outcomes and more superior radiographic evaluation compared to sequential bilateral THA.

scholarly journals The morphology of the proximal femur in cementless short-stem total hip arthroplasty: No negative effect on offset reconstruction, leg length difference and implant positioning

2021 ◽  
Vol 16 (1) ◽  
Author(s):  
Matthias Luger ◽  
Sandra Feldler ◽  
Antonio Klasan ◽  
Tobias Gotterbarm ◽  
Clemens Schopper
Keyword(s):  
Logistic Regression ◽  
Total Hip Arthroplasty ◽  
Hip Arthroplasty ◽  
Proximal Femur ◽  
Short Stem ◽  
Leg Length ◽  
Total Hip ◽  
Implant Positioning ◽  
Length Difference ◽  
Leg Length Difference

Abstract Background Correct reconstruction of hip offset (HO) and leg length are important for clinical–functional outcome and patient satisfaction in total hip arthroplasty (THA). The morphology of the proximal femur can pose a risk for increased leg length difference (LLD) in cementless straight-stem THA. We therefore wanted to evaluate, if this is also applicable in THA with a cementless meta-diaphyseal short stem. Methods In a retrospective study, 106 patients (index surgery 2014–2019) with unilateral THA and a morphologically healthy hip as a reference (Kellgren–Lawrence ≤ 1) were included. The same cementless short stem with meta-diaphyseal fixation and cementless press-fit cup was implanted. The proximal femur was rated by Dorr’s classification, and subgroups were formed afterward. Measurements were carried out on preoperative and 3 months postoperative anterior–posterior radiographs of the pelvis. Kruskal–Wallis test, Fisher’s exact test and binary logistic regression were performed to evaluate the influence of the anatomical shape on postoperative leg length difference and offset reconstruction. Results The Dorr type did not show any significance influence on LLD (p = 0.532), or postoperative difference in femoral offset (p = 0.243), acetabular offset (p = 0.106) and hip offset (p = 0.698). Stem alignment (p = 0.705) and canal fill indices (CFI I: p = 0.321; CFI II: p = 0.411; CFI III: p = 0.478) were also without significant differences. Logistic regression did not show any significant increased risk for a LLD ≥ 5 mm or ≥ 10 mm as well as HO ≥ 5 mm or ≥ 10 mm. Conclusion Reconstruction of hip offset and postoperative leg length difference is not negatively influenced by Dorr type, canal flare index, cortical index and canal-to-calcar ratio in cementless short-stem THA. Implant positioning and canal fill are also not negatively affected by the anatomical shape of the proximal femur. Level of evidence: Level IV.

scholarly journals Primary stability of calcar-guided short-stem total hip arthroplasty in the treatment of osteonecrosis of the femoral head: migration analysis using EBRA-FCA

2020 ◽  
Vol 140 (12) ◽  
pp. 2091-2100
Author(s):  
Yama Afghanyar ◽  
Christoph Danckwardt ◽  
Miriam Schwieger ◽  
Uwe Felmeden ◽  
Philipp Drees ◽  
...  
Keyword(s):  
Femoral Head ◽  
Total Hip Arthroplasty ◽  
Hip Arthroplasty ◽  
Migration Pattern ◽  
Short Stem ◽  
Stem Design ◽  
Total Hip ◽  
Migration Analysis ◽  
Short Stems

Abstract Introduction Osteonecrosis of the femoral head (ONFH) is a disabling condition that often results in secondary arthritis necessitating total hip arthroplasty (THA). Short-stem THA has constantly gained popularity. It remains controversial, whether ONFH represents a risk factor for failure after the implantation of short stems with pronounced metaphyseal anchorage. The potential spread of the osteonecrotic area and bone marrow edema into the metaphyseal bone might result in compromised stability. Early implant migration is considered predictive of subsequent aseptic loosening. The purpose of this study was a migration analysis of a modern, calcar-guided short-stem implant in patients with ONFH in a mid-term follow-up. Materials and methods This retrospective analysis investigated the migration pattern of 45 calcar-guided short stems in patients with ONFH, using Einzel-Bild-Roentgen-Analyse Femoral-Component-Analysis (EBRA-FCA). Influencing factors such as ARCO categories, age, gender, body weight and BMI were analyzed. Complications and adverse events were documented. Results At mid-term [48.1 months (SD 20.7 months)], mean axial migration was 1.56 mm (SD 1.77 mm). Mean migration rate stabilized after 2 years. No influence of ARCO categories, age and BMI was found. A tendency of increased axial migration was observed in male patients and in overweight patients. No revision surgeries had to be performed during follow-up. Conclusion The results indicate a migration pattern comparable to that of primary osteoarthritis patients with slight initial migration under full load followed by subsequent stabilization in the metaphyseal femur. The 100% survival rate at mid-term supports the usage of this short-stem design in patients with ONFH.

A Randomised, Controlled Clinical Study on Total Hip Arthroplasty Using 4 Different Bearings: Results after 10 Years

2016 ◽  
Vol 27 (1) ◽  
pp. 96-103
Author(s):  
Arne Borgwardt ◽  
Bo Zerahn ◽  
Sandra D. Fabricius ◽  
Tine H. Bertelsen ◽  
Henrik Daugaard ◽  
...  
Keyword(s):  
Clinical Study ◽  
Total Hip Arthroplasty ◽  
Hip Arthroplasty ◽  
Total Hip ◽  
Metal On Metal ◽  
Group A ◽  
Group B ◽  
Randomised Controlled ◽  
Group D ◽  
Controlled Clinical Study

Purpose To compare 4 different bearings in total hip arthroplasty (THA) in a randomised controlled clinical study on clinical performance. Methods 393 patients with osteoarthritis of the hip or avascular necrosis were included and allocated to 1 of the head-and-cup couples zirconia-on-polyethylene (group A), metal-on-metal (group B), zirconia-on-polyethylene with the liner moulded into the shell (group C), or alumina-on-alumina (group D). In the individual case the surgeon could choose other implants if indicated. Results 299 patients were operated with the allocated prosthesis. The estimated cumulated prosthesis survival percentages and 95% confidence interval after 10 years were: group A 84.6 (75.8-93.4); group B 95.0 (89.5-100); group C 93.2 (86.7-99.7); group D 66.1 (54.5-77.7). The patients' physical function was significantly improved and remained equally good in all 4 groups, however slightly declining with ageing. The luxation rate was initially high, and equal between the groups, but was reduced by improving the surgical procedure introducing capsule repair by reinsertion of the short external hip rotators. Conclusions The metal-on-metal or zirconia-on-polyethylene prostheses had high 10-year survival percentages. The longevity of these bearing couples by themselves was not related to the combination of materials. The zirconia-on-polyethylene prosthesis with the liner mounted peroperatively possibly exhibited cases of backside wear which the corresponding bearing couple with moulded polyethylene (Asian) did not. The alumina-on-alumina bearing performed poorly - it was redesigned after our study initiation and later withdrawn from the market.

scholarly journals Octyl-2-cyanoacrylate tissue adhesive without subcuticular suture for wound closure after total hip arthroplasty: a prospective observational study on thirty-two cases with controls for 3 months follow-up

2020 ◽  
Vol 15 (1) ◽  
Author(s):  
Li-Shen Wang ◽  
Xin-Yu Wang ◽  
Hao-tian Tu ◽  
Yi-Fan Huang ◽  
Xin Qi ◽  
...  
Keyword(s):  
Total Hip Arthroplasty ◽  
Hip Arthroplasty ◽  
Tissue Adhesive ◽  
Wound Complications ◽  
Subcuticular Suture ◽  
Total Hip ◽  
Skin Staples ◽  
Significant Difference ◽  
Group A ◽  
Group B

Abstract Background Whether using tissue adhesive alone after subcutaneous suture can close the skin incision with safety as well as cosmetic appearance after total hip arthroplasty was not clear. Methods A prospective study was conducted. The same surgical methods were consistent throughout the entire study. After implanting prosthesis, the joint capsule was reconstructed. Fascial and subcutaneous layer were respectively closed by continuous running barbed suture. Patients were randomized allocated to group A with octyl-2-cyanoacrylate tissue adhesive alone, to group B with tissue adhesive after continuous subcuticular suture, or to group C with skin staples. Time of closure, drainage, pain, wound complications, and cosmesis were compared. All data were analyzed statistically. Results There was no significant difference in drainage, Visual Analog Scale score or early wound complications between the three groups. However, there was significant difference in time of closure (P = 0.013). In pairwise comparison, time of closure in groups A and B was significantly longer than those in group C (P = 0.001 and P = 0.023, respectively); time of closure in group A was significantly shorter than those in group B (P = 0.003). Patient and Observer Scar Assessment Scale total scores were not significantly different at 6 weeks and 3 months postoperatively (P = 0.078 and P = 0.284, respectively). Conclusion Tissue adhesive without subcuticular suture was similar with a combination of subcuticular suture and tissue adhesive as well skin staples in terms of safety and cosmetic appearance after total hip arthroplasty.

scholarly journals Short versus conventional stem in cementless total hip arthroplasty

2021 ◽  
Vol 50 (4) ◽  
pp. 296-305
Author(s):  
Arnd Steinbrück ◽  
Alexander W. Grimberg ◽  
Johanna Elliott ◽  
Oliver Melsheimer ◽  
Volkmar Jansson
Keyword(s):  
Total Hip Arthroplasty ◽  
Hip Arthroplasty ◽  
Joint Infection ◽  
Short Stem ◽  
Cumulative Probability ◽  
Term Survival ◽  
Total Hip ◽  
Survival Difference ◽  
Significant Difference ◽  
Short Stems

Abstract Background Short-stemmed total hip arthroplasty (THA) is well established and gaining popularity in Germany. The perception that short stems may predispose to primary instability in the femur has resulted in a more thorough follow-up of younger patient cohorts than the typical uncemented THA population. To address this issue, an evidence-based approach is presented for a retrospective mid-term survival analysis of a large registry-based cohort in primary cementless THA comparing short stems with a matched group of conventional stems. Material and methods Propensity score matching (PSM, see Infobox 1) was used on 131,580 primary cementless THAs fulfilling the inclusion criteria performed between November 2012 and September 2019 and the cumulative probability of revision (CPR) of short and conventional stems for any reason, for reasons excluding prosthetic joint infection (PJI), and due to PJI were compared. Results After PSM at 1:1 balanced groups of 17,526 short stems and of 17,526 conventional stems were achieved demonstrating no significant difference for CPR for any reason and for reasons excluding PJI. Matched CPR for any reason was 2.9% (95% confidence interval, CI, 2.4–3.5%) 5 years after primary THA in the short stem and 3.1% (95% CI 2.7–3.4%) in the conventional stem group. The CPR excluding PJI was 2.2% (95% CI 1.7–2.7%) vs. 2.1% (95% CI 1.8–2.4%). In contrast, the incidence of PJI was statistically significant lower for short stems. Conclusion For the considered period, there was no statistically significant survival difference in uncemented THA between comparison groups but a lower incidence for PJI in short-stem THA. Further analyses of registry data are required to rule out range of indications and late mechanical failure of short stems.

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