1,720,962 research outputs found
The fate of the neck after Collum Femurs Preserving (CFP) prosthesis: a 19-years single center experience.
No full textPurpose: The aim of our study is to evaluate long-term outcomes from a cohort of patients treated with Collum Femoris Preserving (CFP) stem correlating neck resorption with comorbidities, clinical outcomes and complications.
Methods: 176 patients (194 hips) were retrospectively reviewed with a minimum follow-up (f.u.) of 10 years. Demographic and surgical data were collected. Clinical and radiological evaluation was performed at the last f.u. We calculate a Neck Resorption Ratio (NRR). Main complications were recorded. A p-value of <0.05 was considered significant.
Results: Mean HHS was 89.1 ± 5.7; VAS was 1,1 ± 1 and OHS was 41.3 ± 5.1. 7 patients complained thigh pain. Mean LLD was 1.5 mm ± 1.9. Mean NRR was 0.35. We observed 6 cases of Aseptic Loosening (AL), 2 cases of PJI, 1 implant revision for recurrent dislocation and 1 stem revision after PPFF. The overall survival rate of the stem was 94.8 %. Associations between NRR and steroid therapy/stem malposition were significant (p<0,05). Correlation between AL and NRR was significant for p< 0.05. Correlations between NRR and HHS/OHS were - 0.34 and -0.28 respectively. Odds Ratio for AL were: 4.6 if NRR > 0.25; 16.9 if > 0.50 and 24.1 if > 0.75.
Conclusion: CFP hip stem provide excellent long-term outcomes. NRR is correlated to steroid therapy and stem malposition. The risk of stem AL rises according to NRR increase. Patients with a NRR> 0,5, especially if under steroid therapy or with stem malposition, should be strictly followed for AL
Optimum timing of conversion from DCO to definitive fixation in closed fractures of the lower limb: When and how?
No full textIntroduction: In damage control orthopaedics (DCO), fractures are initially stabilised with external fixation followed by delayed conversion to definitive internal fixation. The aim of this study is to determine whether the timing of the conversion influences the development of deep infection and fracture healing in a cohort of patients treated by DCO after a closed fracture of the lower limb. Furthermore, we wanted to evaluate whether the one-stage conversion procedure is always safe. Materials and methods: A retrospective cohort study was conducted at a single level 1 trauma centre. Ninety-four cases of closed fractures of lower limb treated by DCO subsequently converted to internal fixation from 2012 to 2019 were included. Development of deep infection, superficial infection, non-union and time to union were recorded. Patients were then divided into three groups according to the timing of conversion: Group A (<7 days), Group B (7-13 days), Group C (> 14 days). Comparison between groups was performed to assess intergroup variabilty. Results: The mean number of days between DCO and conversion was 6.7±4.52 (range 1-22). We observed one case of deep infection (1.1%), one case of non-union (1.1%), four cases of superficial infection (4.3%) and mean time to union was ±1.38 months. Comparison between groups demonstrated no significant correlation between timing of conversion and development of superficial or deep infection and non-union, while it highlighted that complexity of the fracture and longer surgical time of conversion procedure were significantly higher in Group C. Conclusions: One-stage conversion to definitive internal fixation within 22 days from DCO is a safe and feasible procedure, which does not influence the incidence of infection or non-union
Lumbar total disc arthroplasty: outdated surgery or here to stay procedure? A systematic review of current literature
No full textAbstract Background The purpose of this study was to summarize the available evidence about total lumbar disc replacement (TDR), focusing our attention on four main topics: clinical and functional outcomes, comparison with fusion surgery results, rate of complications and influence on sagittal balance. Materials and methods We systematically searched Pubmed, Embase, Medline, Medscape, Google Scholar and Cochrane library databases in order to answer our four main research questions. Effective data were extracted after the assessment of methodological quality of the trials. Results Fifty-nine pertinent papers were included. Clinical and functional scores show statistically significant improvements, and they last at all time points compared to baseline. The majority of the articles show there is no significant difference between TDR groups and fusion groups. The literature shows similar rates of complications between the two surgical procedures. Conclusions TDR showed significant safety and efficacy, comparable to lumbar fusion. The major advantages of a lumbar TDR over fusion include maintenance of segmental motion and the restoration of the disc height, allowing patients to find their own spinal balance. Disc arthroplasty could be a reliable option in the treatment of degenerative disc disease in years to come. Level of evidence II
What is the Current Evidence on Vertebral Body Osteonecrosis?: A Systematic Review of the Literature
Get PDFOsteonecrosis (ON) is a clinical entity characterized by a pattern of cell death and complex process of bone resorption and formation. Studies related to ON have largely focused on certain anatomical sites; however, the evidence on vertebral body ON (VBON) is largely inconsistent and fragmented. The aim of this study was to clarify the pathophysiology, risk factors, imaging findings, and available treatment modalities for VBON. A systematic review of the relevant articles published in English was performed using PubMed, Embase, Medline, Google Scholar, Cochrane Central Register of Controlled Trials (CENTRAL), and CINAHL databases. A total of 81 articles were included in this study. Three main topics about VBON were identified: (1) pathophysiology and risk factors, (2) diagnosis, and (3) treatment. Forty-five studies were based on the pathophysiology, 52 on diagnosis, and 38 on the treatment options for VBON. The literature on VBON was limited and mainly focused on post-traumatic cases with a considerable overlap with nonunion and pseudoarthrosis
Extreme lateral interbody fusion in spinal revision surgery: clinical results and complications
No full textPurpose of the study: To evaluate clinical outcomes and complications of extreme lumbar interbody fusion (XLIF) in spinal revision surgery comparing our data with the available literature evidence about other fusion techniques. Materials and methods: Retrospective analysis of patients underwent revision surgery with XLIF as interbody fusion technique. Demographic, comorbidity, surgical data, clinical results, and intraoperative and postoperative complications were recorded. Results: 36 patients, with a minimum follow-up of 28 ± 11.5 months, were included in the analysis. 41 levels were fused with XLIF. The mean number of previous spine surgery was 1.5 ± 0.7. Mean improvement in back pain and leg pain on VAS was 5.6 ± 1.4 (p < 0.01) and 3.5 ± 2 (p < 0.01), respectively. Mean improvement in the ODI score was 30.3 ± 7.3 (p < 0.01). 1 vertebral endplate fracture during interbody space preparation was reported during lateral approach. 5 patients (13.8%) complained quadriceps weakness and anterior thigh hypoesthesia fully recovered after 3 months from surgery, and in one case, a transient contralateral radiculopathy was observed. No implant failure was detected at final follow-up. Conclusions: XLIF is a reasonably safe and effective fusion technique in revision surgery that allows valid arthrodesis avoiding scarred tissue created by previous surgical approaches. Especially, XLIF reduces the risk of nerve root lesions, postoperative radiculitis, and durotomies compared to posterior fusion techniques
Porous metal cones: gold standard for massive bone loss in complex revision knee arthroplasty? A systematic review of current literature
No full textIntroduction: Revision knee arthroplasty is increasing, and in that case, bone loss management is still a challenging problem. In the last years, the body of literature and interest surrounding porous metal cones has grown, but few systematic evaluations of the existing evidence have been performed. The aim of our systematic review is to collect and critically analyze the available evidence about metal cones in revision knee arthroplasty especially focusing our attention on indications, results, complications, and infection rate of these promising orthopaedic devices. Materials and methods: We performed a systematic review of the available English literature, considering the outcomes and the complications of tantalum cones. The combinations of keyword were “porous metal cones”, “knee revision”, “bone loss”, “knee arthroplasty”, “periprosthetic joint infection”, and “outcome”. Results: From the starting 312 papers available, 20 manuscripts were finally included. Only one included study has a control group. The main indication for metal cones is type IIb and III defects according AORI classification. Most of the papers show good clinical and radiological outcomes with low rate of complications. Conclusion: The examined studies provide encouraging clinical and radiological short-to-mid-term outcomes. Clinical studies have shown a low rate of aseptic loosening, intraoperative fractures, infection rate and a lower failure rate than the previous treatment methods. Higher quality papers are needed to draw definitive conclusions about porous metal cones
Femoral revision with primary cementless stems: a systematic review of the literature
No full textThe use of primary cementless stems in femoral revision has gained popularity, but no clear consensus about the correct indication is still present. The aim of our systematic review is to: (1) summarize the available literature focused on the use of cementless primary stem in revision total hip arthroplasty (THA); (2) evaluate whether the use of cementless primary stems could represent a feasible option in hip revision; (3) define the proper indication of this surgical approach. A systematic literature review was performed about the use of cementless primary stems in revision THA. The PRISMA 2009 checklist was considered to edit our review. A total of nine articles were included. The current evidence is primarily Level IV. A total of 439 patients (454 hips) underwent THA revision with primary cementless stem. Partial cementless porous coated stems were used in 246 hips (54.2%). The majority of patients were affected by type I or II Paprosky femoral defects. The mean stem-related survival rate is 95.6% ± 3.8 with a mean follow-up of 4.7 years ± 1.3. Poor standardization of methodological analysis was observed. Current literature shows lacking evidence about primary cementless stems in revision THA. Despite these limitations, we can affirm that primary cementless stems in femoral revision surgery represent a viable option in selected patients. The proper indication is a patient with femoral Paprosky defect types I or II, with low number of previous surgeries and a previous cementless stem
Going Beyond Counting First Authors in Author Co-citation Analysis
Get PDFThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Metaphyseal sleeves in total knee arthroplasty revision: complications, clinical and radiological results. A systematic review of the literature
No full textIntroduction: Total knee arthroplasty revision (TKAr) is increasing of relevance in orthopaedic surgeon daily practice and will become more and more relevant in the future. The aim of this study is to summarize indications, complications, clinical and radiological mid-term results of metaphyseal sleeves in management of bone defects in TKAr. Methods: A systematic review of English literature was performed on Medline. Retrospective or prospective studies with 2 years of follow-up (FU) were included. The PRISMA 2009 flowchart and checklist were considered to edit the review. Rates of intraoperative fractures, aseptic loosening, periprosthetic joint infection (PJI), reoperations and re-revisions were extrapolated by the papers. Results: 13 articles with a level of evidence of IV were included in the systematic review. 1079 TKAr (1554 sleeves) with a mean FU of 4.0 ± 1.1 years were analysed. The studies showed good clinical and functional outcomes. Sleeves allowed a stable metaphyseal fixation and osseointegration with an implant and sleeves aseptic survival rate of 97.7 and 99.2%, respectively. The incidence of PJI was 2.7 ± 2.4%. The estimated rate of reoperations and re-revisions were 14.2 ± 9.2 and 7.1 ± 4.8%, respectively. Conclusion: Metaphyseal sleeves represent a viable option in management of types IIb and III AORI bone defects in TKAr. Further high-quality log-term studies would better clarify complications, clinical and radiological results of this promising technique in total knee arthroplasty revision
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