Risk Analysis of Restrictive Factors for Fast-Track Knee Arthroplasty-A Retrospective Study of 1,224 Patients.

Introduction: With the implementation of a fast-track principle as an interdisciplinary and multimodal concept, an accelerated convalescence and reduction of postoperative complications and a reduction of hospital stay can be achieved. This has been shown not only to increase patient satisfaction but in reduction of hospital cost as well. However, the concept cannot be successfully implemented in all patients.

[Periprosthetic infection after total hip replacement : Risk factors for an early infection after primary implantation].

Background: Periprosthetic infection is one of the most serious complications in primary arthroplasty. The infection rates reported in the current literature range from 0.36 to 2.

Correction to: The High Flex Total Knee Arthroplasty-Higher Incidence of Aseptic Loosening and No Benefit in Comparison to Conventional Total Knee Arthroplasty: Minimum 16-Years Follow-Up Results.

[This corrects the article DOI: 10.1007/s43465-020-00276-3.].

Superior clinical results and higher satisfaction after customized compared with conventional TKA.

Investigation of functional outcome and patient`s satisfaction after implantation of a customized versus conventional TKA. In 31 consecutively enrolled patients with primary gonarthrosis, 33 customized TKA (custTKA) and in 31 patients, a conventional TKA (convTKA) was implanted. Perioperative and postoperative management were identical.

Risk analysis of restrictive factors for fast-track hip arthroplasty - a retrospective study of 1138 patients.

Fast track programs have been introduced to reduce perioperative complication rates and to quickly reintegrate the patient into everyday life. The aim of this retrospective case-control study was to identify patient characteristics and patient-independent factors that influence fast track programs in hip arthroplasty. A total of 1138 patients were examined.

Correction to: The High Flex Total Knee Arthroplasty-Higher Incidence of Aseptic Loosening and No Benefit in Comparison to Conventional Total Knee Arthroplasty: Minimum 16-Years Follow-Up Results.

[This corrects the article DOI: 10.1007/s43465-020-00276-3.].

Retrospective Clinical and Radiological Outcomes of Total Hip Arthroplasty in 51 Patients After a Mean 8.2 Years Using the Nanos® Short-stem Prosthesis.

Introduction: Over the past several years, femoral short-stem hip implants have become more popular as a treatment option in the field of primary hip arthroplasty for younger and more active patients. Current data on clinical outcomes and the implant survival rates in patients with short-stem implants cover a maximum of five to six years. The aim of this study was to assess the survival rates, as well as clinical and functional outcomes, in total hip arthroplasty (THA) using the Nanos® short-stem implant (Smith & Nephew, Marl, Germany) over a follow-up period exceeding 5 y.

[COVID-19- and influenza-associated deaths in Munich as of March 2020-a standardized analysis of death certificates].

Introduction: In light of the current COVID-19 pandemic, the idea arose to conduct a study to comparatively evaluate deaths from two respiratory transmissible infectious diseases (pandemic COVID-19 and seasonal influenza) by means of death certificates received by the health department.

Methods: Death certificates of all deaths in Munich in the death period from 1 March-31 December 2020 were analyzed. The predefined inclusion criteria were the indication of "Corona, COVID-19, SARS-CoV‑2, Influenza (A/B)" on the death certificates.

[COVID-19 deaths among residents of inpatient nursing homes in Munich-causes and places of death].

Introduction: The new infectious disease COVID-19 first appeared in China in December 2019. So far, a systematic evaluation of death certificates of COVID-19-associated deaths of residents in inpatient nursing homes has not been presented.

Methods: Death certificates of all deaths in Munich in the death period from 1 March to 31 July 2020 were analyzed.

The High Flex Total Knee Arthroplasty-Higher Incidence of Aseptic Loosening and No Benefit in Comparison to Conventional Total Knee Arthroplasty: Minimum 16-Years Follow-Up Results.

Purpose: This prospective randomized study compares the clinical and radiographic long-term results at least 16 years after total knee arthroplasty (TKA) between a mobile-bearing high flex and a fixed-bearing posterior-stabilized knee.

Methods: In 2000, we included 60 patients who underwent a TKA. Patients were divided into two groups.

[COVID-19-associated deaths].

Introduction: In December 2019, the new infectious coronavirus disease 2019 (COVID-19) first appeared in China. So far, no systematic evaluation of death certificates of COVID-19-associated deaths has been presented.

Methods: The death certificates of all deaths in Munich during the period from 1 March to 31 July 2020 were analyzed.

[Geographic methods for health monitoring].

The interest in using geographic methods for health monitoring has grown strongly over the last two decades. Through these methods, analysis and visualization of health data can be more focused and target-group specific. The application in health monitoring is possible mostly due to broader technical possibilities and more available datasets.

Multiple asystole events in a patient undergoing total knee arthroplasty - a case report.

Background: Unexpected cardiac arrest in patients during surgery is associated with high mortality. Reasons are often multifactorial and unclear.

Case Presentation: This case report describes a patient who developed reversible asystole during knee surgery under general anaesthesia.

[Psychoeducation in knee arthroplasty patients : Additional pain management].

Approximately 20-30% of patients remain dissatisfied with their treatment outcome after primary knee arthroplasty. Particularly frequent pain with limited flexibility contrives to reduce the quality of life of affected patients. Psychotherapeutic methods for pain processing after knee arthroplasty have hardly been investigated to date.

Comparative Results of Percutaneous Calcaneal Osteotomy in Correction of Hindfoot Deformities.

Background:: Calcaneal osteotomies are often required in the correction of hindfoot deformities. The traditional open techniques, which include a lateral or oblique incision, are occasionally associated with wound healing problems and neurovascular injury.

Methods:: A total of 122 consecutive patients who underwent a calcaneal osteotomy for hindfoot realignment treatment were included.

Posterolateral plate fixation with Talarlock is more stable than screw fixation in ankle arthrodesis in a biomechanical cadaver study.

Background: A number of studies report on limitations of the screw arthrodesis in severe malalignment of the hindfoot, neuropathic deformity, poor bone quality and osteoporosis.

Methods: Fourteen anatomically correct polyurethane foam models of the right leg (Sawbones Europe, Malmö, Sweden) and eighteen fresh-frozen human lower leg specimens (9 pairs) were used for the comparative biomechanical testing.

Results: The statistical analysis of the stiffness of the fixation developed a significant difference in favor of the plate in all test directions.

Preliminary results of a plantar plate for Lapidus arthrodesis.

The TMT I arthrodesis is an established procedure for the correction of hallux valgus deformity associated with the instability of the TMT-I joint. A risk of transfer metatarsalgia is reported in the literature associated with persistant elevation of MT-I. Detailed information for ideal positioning of the arthrodesis is missing so far.

Impact of the body mass index on perioperative immunological disturbances in patients with hip and knee arthroplasty.

Background: Obesity increases the risk for knee and hip joint implantation and negatively contributes to wound healing. In this study, in 52 patients undergoing hip and knee arthroplasty the amount of peripheral immune effector cells pre- and post-operative, as well as the expression of certain soluble factors affecting the functions of immune effector cells were investigated.

Methods: The peripheral immune cells and the expression of the soluble factors were determined by flow cytometry and correlated to each other in dependency of the BMI, the sex, and the kind of arthroplasty.

Immediate fullweightbearing after tarsometatarsal arthrodesis for hallux valgus correction--Does it increase the complication rate?

Background: The arthrodesis of the first tarsometatarsal joint has a high correction potential in the treatment of hallux valgus deformity. Compared to distal correction procedures, a pseudarthrosis rate of 12-20% is quoted, however. In a prospective study the results of two different treatment procedures after correction arthrodesis were compared.

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

Introduction: Femoroacetabular impingement (FAI) is a recognised cause of secondary osteoarthritis of the hip. Several imaging methods have been used to analyse the pathologic signs. Because of the lack of precise pre- and intraoperative overview and the difficulty locating osseous pathologies, arthroscopic and minimal invasive treatment is still challenging, even for trained surgeons.

A prospective randomized radiographic and dual-energy X-ray absorptiometric study of migration and bone remodeling after implantation of two modern short-stemmed femoral prostheses.

Background: The aim of this prospective randomized study was to analyze migration and strain transmission of the Metha™ and Nanos™ femoral prostheses.

Materials And Methods: Between 1 January 2011 and 2 April 2013, 50 patients were randomized to receive short-stemmed femoral prostheses. Metha™ stems were implanted in 24 patients (12 female, 12 male; mean age 58.

Use of hyaluronidase for pharmacokinetic increase in bioavailability of intracutaneously applied substances.

Endogenous hyaluronidases in the human body have physiological and pathophysiological significance due to their enzymatic activity during the cleavage of hyaluronan. The potential of therapeutic use of testicular and recombinant hyaluronidase has been increasingly acknowledged and developed in recent years. Most relevant in practice is the co-application of hyaluronidase and other active substances in order to enhance their bioavailability within the tissue.

Anatomical conditions of the posterior pelvic ring regarding bisegmental transverse sacroiliac screw fixation: a 3D morphometric study of 125 pelvic CT datasets.

Introduction: Sacroiliac (SI) screws are used for osteosynthesis in unstable posterior pelvic ring injuries. In the cases of "sacral dysplasia", in which the elevated upper sacrum does not allow a secure SI screw insertion into the S1 level, the S2 segment must be used to achieve stable fixation. The bone quality of the S2 segment is thinner compared to that of the S1 vertebra and may cause biomechanical weakness.

Articular cartilage chondrocytes express aromatase and use enzymes involved in estrogen metabolism.

Introduction: Sex hormones, especially estrogens, have been implicated in articular cartilage metabolism and the pathogenesis of postmenopausal osteoarthritis. The conversion by aromatase (CYP19A1) of androstenedione into estrone (E1) and of testosterone into 17β-estradiol (E2) plays a key role in the endogenous synthesis of estrogens in tissue.

Methods: We analyzed the expression of aromatase (CYP19A1) in immortalized C-28/I2 and T/C-28a2 chondrocytes, as well as in cultured primary human articular chondrocytes and human articular cartilage tissue, by means of RT-PCR, Western blotting and immunohistochemistry.

[Morbid obesity in total knee arthroplasty: a critical case review].

History And Admission Findings: In a 66-year-old obese woman (WHO stage III, BMI 51 kg/m2) pronounced osteoarthritis of the right knee was diagnosed. Because of progressive chronic pain of the right knee joint her walking distance was limited to a few meters. Conservative therapy was exhausted.