Kiriakos Daniilidis

Kiriakos Daniilidis
Hannover Medical School | MHH · Clinic for Orthopaedic Surgery (in the Annastift Hospital)

Priv.-Doz.Dr.med.

About

100
Publications
24,131
Reads
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1,279
Citations
Citations since 2017
42 Research Items
861 Citations
2017201820192020202120222023050100150
2017201820192020202120222023050100150
2017201820192020202120222023050100150
2017201820192020202120222023050100150
Introduction
Additional affiliations
March 2012 - present
Hannover Medical School
Position
  • Consultant
Description
  • Foot and Ankle / Technical Orthopaedic

Publications

Publications (100)
Article
Full-text available
IntroductionUnicompartmental knee arthroplasty (UKA) and total knee arthroplasty (TKA) are standard procedures for treating knee joint arthritis. Neither UKA nor TKA seems to be optimally suited for patients with bicompartmental osteoarthritis that affects only the medial and patellofemoral compartments. A bicompartmental knee arthroplasty (BKA) wa...
Article
Background The present case report describes the 5-year follow-up results of an atypical knee disarticulation of a man previously treated with an oncologic total knee arthroplasty due to an Ewing sarcoma. Methods The patient presented an aseptic loosened tibial component of a tumor prosthesis system and requested final amputation, as he had previo...
Article
There is no clear recommendation for wound closure material in foot and ankle surgery. Thus, we hypothesized that there was no difference in clinical outcomes among three suture materials, namely, absorbable sutures, non-absorbable sutures, and metallic staples. This study compared the three materials for wound closure in foot and ankle surgery. In...
Article
Full-text available
Background Revision rates after total ankle replacements (TARs) are higher compared with other total joint replacements. The present study aimed to establish a new patient-specific implantation (PSI) technique for TAR. Material and methods A total of 10 complete Caucasian cadaver legs had whole leg computed tomography scans. The individual geometr...
Article
Full-text available
Introduction: Due to demographic changes, total knee arthroplasty (TKA) is one of the most frequently performed orthopedic surgeries. Therapies for associated postoperative complications, such as postoperative knee stiffness (PKS), are becoming increasingly important. The aim of this retrospective matched-pair analysis was to evaluate mid-term-res...
Article
Background. Finding the right diagnoses in patients with complex foot and ankle disorders can be challenging. Single-photon emission computed tomography and computed tomography (SPECT-CT) has shown to be feasible in foot and ankle surgery. The aim of this study was to evaluate the reliability and accuracy of SPECT-CT and thereby its impact on final...
Article
Zusammenfassung Hintergrund Zehenamputationen und Strahlresektionen zählen zu den Minor-Amputationen am Fuß, Obwohl Zehenamputationen und Strahlresektionen zur Therapie von vielen Pathologien eignet, ist das Diabetische Fußsyndrom der häufigste Grund für diese Amputationen. In den letzten Jahren ist es zu einem Anstieg von Minor-Amputationen im Ve...
Article
Background Drop foot can be caused by many conditions. Stroke is one of the major causes of drop foot and 5% of stroke survivors suffer from hemiplegia, which in some cases, can manifest as drop foot. The abnormal gait resulting from the lack of innervation of the extensor muscles may result in a secondary malposition of the foot and lead to a step...
Article
Background Staple sutures have already been proven as a good alternative to nylon sutures for wound closure in hip and knee surgeries. One such advantage to using staple sutures is the significant decrease in surgical time. In foot surgeries, staple sutures are still considered critical and are only used sporadically. Objective The aim of this ret...
Article
Background:: Evans (E) and Hintermann (H) lateral lengthening calcaneal osteotomies (LLCOTs) are commonly used to correct flexible flatfoot deformities. Both methods are well accepted and produce good clinical results. The aim of this study was to compare the postoperative outcomes of both osteotomies. Methods:: We retrospectively examined 53 pa...
Article
Zusammenfassung Hintergrund Zur Behandlung des Hallux Rigidus existieren, je nach klinischer Ausprägung, unterschiedliche Therapieverfahren. Dazu gehört unter den operativen Optionen vor allem gelenkerhaltende und –resezierende Verfahren, die MTP-I-Arthrodese gehört dabei zu den bewährtesten therapeutischen Optionen. Material und Methode Ziel der...
Article
Full-text available
Background Several studies have shown that patients with a unilateral amputation have an increased risk of developing osteoarthritis (OA) in the knee of their sound leg. OBJECTIVE: The first objective was to investigate whether amputees are more frequently affected by gon-, cox- or polyarthritis as well as back pain or spinal disorders. We hypothes...
Data
Age distribution of the includes patients and control group. Age distribution of patients diagnosed with the six selected diagnoses regarding musculoskeletal disorders based on the 10th revision of the International Classification of Diseases (ICD)[18]. (XLSX)
Data
Age distribution of the population in Germany. Age distribution of the population in Germany and in the individual federal states. The data were collected within the framework of the large census in 2011 [17]. (XLSX)
Data
Mean age of the observed groups. Calculation of the mean age of the amputees and the five control groups with the observed diagnoses. (XLSX)
Data
Raw data of amputees and control group from the insurer. Raw data of the insurer with the number of affected amputees and the control group over all ICD codes based on the 10th revision of the International Classification of Diseases [18]. On the basis of these data, the statistical analysis of the first objective was carried out using the Chi-squa...
Article
Background Hallux valgus is a common diagnosis in orthopedics. Only a few studies have analyzed the effects of conservative therapy. Therefore, the current study analyzed the effect of a dynamic hallux valgus splint. Methods Seventy patients were included in this prospective randomized trial. Patients with a hallux valgus were treated using a dynam...
Article
Background: Lateral lengthening calcaneal osteotomies (LLCOT) are commonly used to treat flexible pes planovalgus deformity. Different operative techniques have been described. The aim of this study was to examine which anatomic structures were affected by 2 different osteotomy techniques. Methods: Two experienced foot and ankle surgeons each pe...
Article
Background: Thorough understanding of the morphometry of the ankle joint is crucial to optimize conservative and operative therapy of ankle joint disorders. Despite recent improvements, basic anatomic and biomechanical correlations of the ankle joint including the orientation of the ankle joint axis and joint morphology as its key biomechanical fe...
Article
Full-text available
Modern orthopaedic surgery provides a variety of techniques for cartilage repair. The Autologous Matrix-Induced Chondrogenesis (AMIC) procedure is a single-step technique with a collagen I/III scaffold for the treatment of full-thickness cartilage lesions. The aim of the study was to analyze the outcome of the AMIC procedure in overweight patients...
Article
Full-text available
Background Despite intensive research there is no consensus about the talocrural joint axis. The aim of the present study is a new method to determinate the geometric rotational axis of the talocrural joint. Methods We analyzed 98 CT-scans of full cadaver Caucasian legs. We generated three-dimensional reconstruction models of the talus. A best fit...
Chapter
The adult paralytic foot or drop foot is a secondary related foot deformity, which usually arises due to neurogenic damage (Kunst et al. in Stroke 42:2126–2130, 2011; Truelsen et al. in European Journal of Neurology 13:581–598, 2006). The lack of neural innervation of the muscles, which play a major role in ankle dorsiflexion—M. tibialis anterior,...
Article
Full-text available
Background: For the treatment of hallux valgus commonly distal metatarsal osteotomies are performed. Persistent problems due to the hardware and the necessity of hardware removal has led to the development of absorbable implants. To overcome the limitations of formerly used materials for biodegradable implants, recently magnesium has been introduc...
Article
Rupturen der Sehne des M. tibialis anterior treten häufig im Rahmen degenerativer Vorschädigungen auf. Betroffen ist hauptsächlich der distale avaskuläre Anteil der Sehne. Häufig findet aufgrund der guten Kompensation über die langen Zehenstrecker eine verzögerte Diagnosestellung statt. Neben der klinischen Untersuchung ist v. a. die Diagnostik mit...
Article
Zusammenfassung Häufige Folge eines Schlaganfalls ist eine Fußlähmung. Sie führt zu wesentlichen Beeinträchtigungen im Gangvorgang. Der Gang wird unsicher. Der Betroffene ist meist gezwungen, den Kopf zu neigen, da er ein visuelles Feedback des Gehens benötigt. Neben chirurgischen und konservativen Methoden hat sich in den letzten zehn Jahren die f...
Article
Full-text available
Category Ankle Introduction/Purpose Understanding the morphometry of the ankle joint is crucial to improve total ankle replacement (TAR). Despite improvements of the implant material TAR did not reach comparable success rates to total hip or knee arthroplasty. Recent studies queried whether current designs match with the articular geometry. The pr...
Article
Full-text available
Category Ankle Introduction/Purpose The total ankle replacement (TAR) is increasingly used in cases of severe ankle arthritis. Although the knowledge about joint kinematics is crucial for designing and positioning of TAR there is no consensus about the talocrural joint axis. The aim of the present study was the determination of the kinematic rotat...
Article
Full-text available
Category Hindfoot Introduction/Purpose Evans and Hintermann calcaneal osteotomies are commonly used to correct flexible pes planovalgus deformity. Both methods are well accepted with good clinical results. The aim of this study was to compare the outcomes after Evans or Hintermann osteotomy. Methods We retrospectively examined 49 patients who wer...
Article
Full-text available
Category Hindfoot Introduction/Purpose Both Evans- and Hintermann-osteotomies are commonly used for the treatment of flexible pes planovalgus deformity. The aim of this study was to examine, which anatomical structures are affected by the performed osteotomy. Methods Two experienced foot and ankle surgeons performed an Evans- or Hintermann-osteot...
Article
Full-text available
Category Pain managment Introduction/Purpose Most surgeons believe, that the postoperative pain course after foot and ankle surgery differs from other joints due to the initial protection and immobilization. The knowledge of the normal pain course after foot and ankle surgery is important to know for the surgeon and correctly inform patients preop...
Article
Objective: Gait improvement by restoring dorsiflexion using a neuroprosthesis implant. Indications: Foot drop with damage to the 1st motor neuron; passive mobility in ankle is possible; adult patients. Contraindications: Foot drop with peripheral damage and injury to the peroneal nerve; already implanted stimulators (e.g., defibrillator, pacem...
Article
Background Neurogenic drop foot may be caused by central or peripheral lesions of the nervous system. Depending on whether the first or second motor neuron is damaged, a flaccid or spastic drop foot develops. Spastic drop foot persists as a residual long-term complication after stroke in about 14 % of patients. Various conservative and surgical tre...
Article
Full-text available
IntroductionUnlike the drop foot therapy with ortheses, the therapeutic effect of an implantable peroneus nerve stimulator (iPNS) is not well described. IPNS is a dynamic therapy option which is placed directly to the motoric part of the peroneal nerve and evokes a dorsiflexion of the paralysed foot. This retrospective study evaluates the kinematic...
Article
The tarso-metatarsal?1 joint (TMT-I) arthrodesis is a?treatment option or moderate to severe hallux valgus (HV) deformities. Instability of the TMT1 joint is still a?debatable indication. Using stable osteosynthesis techniques allows early postoperative weight bearing. Plantar plating combined with a?lag screw is the biomechanical most stable const...
Article
The hallux valgus represents combined bony and soft tissue pathology. In addition to known bony surgical procedures, addressing the soft tissue with regard to the anatomical structures, the surgical technique and the extent of correction are discussed.The goal of the operation is the restoration of the physiological balance between the active and p...
Article
Background: An active ankle dorsiflexion is essential for a proper gait pattern. If there is a failure of the foot lifting, considerable impairments occur. The therapeutic effect of an implantable peroneus nerve stimulator (iPNS) for the ankle dorsiflexion is already approved by recent studies. However, possible affection for knee and hip motion a...
Article
Background: This study compared outcomes after treatment of acute Achilles tendon (AT) rupture via percutaneous suturing, with those after chronic AT rupture treated via open reconstruction. Methods: This retrospective study included 30 patients who underwent either percutaneous suturing for acute AT rupture (group AR, n=16) or open reconstructi...
Article
Introduction: Neurologic paralysis of the foot due to damage to the central nervous system is primarily caused by a cerebral insult. The ankle-foot orthosis (AFO), which is the classical conservative treatment option, is associated with drawbacks, e.g., increased contractures, limited mobilization from the sitting position, and cosmetic aspects....
Article
Full-text available
Das Talo-navikular Gelenk stellt das zentrale Gelenk des Rückfußes dar. Fehlstellungen des Rückfußes können über eine Arthrodese ausgeglichen werden, solange die Anschlußgelenke flexibel sind. Die Indikationen, Technik des Verfahrens und die Ergebnisse werden in diesem Artikel diskutiert.
Article
Full-text available
Objective: The objective was to obtain first insights into the kinematic and kinetic walking patterns resulting from an implanted functional electrical stimulation system in subjects with a drop foot caused by stroke. Methods: Four subjects who experienced a stroke were chosen due to a comparatively long/short time after surgery and young/old at...
Article
Objective: Debridement of infected tissue with the main aim being the re-establishment of mobilization with preservation of standing and walking ability. Prevention of secondary pressure points or amputations due to inadequate resection or deficient soft tissue cover. Indications: In the case of increasing necrosis of the big toe, surgical abras...
Article
Full-text available
Introduction: Tibiocalcaneal (TC) arthrodesis is a limb salvage method for patients with severe deformities combined with necrosis and/or luxation of the talus. The aim of this study was to examine the clinical and radiological outcome of TC arthrodesis. Materials and methods: This retrospective study identified 12 patients with luxation and/or...
Article
Background: The standard treatment of a periprosthetic infection after TKA involves a two-stage reimplantation with the intermittent implantation of spacers. Different designs of spacers have been described; currently articulating spacers and fixed spacers are used. The aim of the present study is to compare the advantages/disadvantages of the dif...
Article
Full-text available
This is the first larger study analyzing the use of magnesium-based screws for fixation of modified Chevron osteotomies in hallux valgus surgery. 44 patients (45 feet) were included in this prospective study. A modified Chevron osteotomy was performed on every patient and a magnesium screw used for fixation. The mean clinical follow up was 21.4 wee...
Article
Charcot neuropathy (CN) is a severe joint disease that makes surgical planning very challenging, because it is combined with ankle instability, serious deformities, and recurrent ulceration. The aim of the present study was to examine the rate of bone fusion after external or internal fixation in patients with CN. We retrospectively examined 58 pat...
Article
Introduction: Obesity is a common problem in the western European countries. Since the association between obesity and the emergence of gonarthrosis is approved, it is more important to gain reliable information about this patient group. The aim of the present retrospective study is to evaluate clinical outcomes of German obese patients after tota...
Article
Full-text available
Background: The modified Lapidus procedure is an accepted treatment option for patients with moderate to severe hallux valgus. Placing a plate plantar on the tension side of the arthrodesis has been shown to be biomechanically superior and has provided good clinical results. There is some concern about interference of the plantar placed plates on...
Article
Background: Different operative techniques have been proposed for the treatment of insertional Achilles tendinopathy (IAT), with often disappointing results. The aim of this study was to evaluate the outcome of the transtendinous approach in IAT. Methods: Forty patients operated with an IAT between 2010 and 2011 were included in this retrospecti...
Article
Hintergrund: Material und Methoden: Ergebnisse: Diskussion: Introduction: Biodegradable implants can help to minimize the risk for hardware removal after forefoot surgery. Magnesium-alloy implants are a new material for this indication. Material and Method: 22 patients treated for symptomatic Hallux valgus deformity, by a distal metatarsal osteotom...
Article
Full-text available
Objective Many different techniques have been described for performing tibiotalocalcaneal arthrodesis (TTCA) in patients with severe hindfoot disorders such as failed ankle arthroplasty and failed ankle joint arthrodesis with subsequent subtalar arthritis. The use of straight retrograde intramedullary nails is extremely limited because they may int...
Article
Full-text available
We report an unusual case of a 38-year-old physically active patient, who suffered a Ewing sarcoma during adolescence and was therefore treated with a tumor endoprostheses ex domo (replacement of distal femur and proximal tibia). Since then he had undergone a couple of surgical interventions for revision and is currently suffering from persistent p...
Article
Full-text available
SCHLÜSSELWÖRTER Fuß-und Sprungge-lenkschirurgie; Arthrose; SPECT-CT; Therapieentscheidung Zusammenfassung Die Diagnosefindung in der Fuß-und Sprunggelenkschirurgie kann durch die Nähe der anatomischen Strukturen und zum Teil fehlender Korrelation zwischen morphologischen Veränderungen und Symptomen in komplexen Fällen schwierig sein. Die Einzelphot...
Article
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Objectives: A periprosthetic joint infection (PJI) is a significant complication after total knee arthroplasty (TKA). Still there is no agreement on a perfect diagnosis and treatment algorithm. The aim of this study was to evaluate the success and revision rates after two-stage revision total knee arthroplasty (TKA) and factors that affect the suc...
Data
Full-text available
Supplementary material is available on the publisher’s web site along with the published article.
Article
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Background We have shown previously that some calcium antagonists inhibit hyaluronan export, loss of proteoglycans, and degradation of collagen from osteoarthritic cartilage. Clinically approved calcium antagonists normally are prescribed for cardiac arrhythmia. In the present study, we compared the effect of these drugs on osteoarthritic patients...
Article
Full-text available
Two-stage revision arthroplasty is today regarded as the gold standard treatment method for deep prosthetic joint infection. The aim of the present study was to evaluate clinical and functional outcomes with the Modular Universal Tumor And Revision System (MUTARS) RS stem in patients undergoing two-stage revisions. The functional and clinical outco...
Article
Full-text available
Background: Despite technical improvements, aseptic loosening after total knee arthroplasty (TKA) remains a frequent complication. A one-stage revision arthroplasty is the most common therapeutic pathway. Objective: The aim of this study was to evaluate the diagnostic value of bone scintigraphy in detecting aseptic loosening after TKA. Methods:...
Article
Full-text available
Background: Single-photon emission computed tomography and computed tomography (SPECT-CT) has a high impact on diagnosis and treatment decision of different joints. The aim of this study was to evaluate whether there is a different gain of SPECT-CT for different foot regions. Material and methods: We retrospectively identified 86 patients who re...
Article
Full-text available
Femoroacetabular impingement (FAI) is predominant in young male athletes, but not much is known about gait differences in cases of increased hip alpha angles. In our study, the hip alpha angle of Notzli of soccer players was quantified on the basis of magnetic resonance imaging (MRI) with axial oblique sequences. The aim of the current study was to...
Article
Erkrankungen der Peronealsehnen gehören zu den seltenen und — vielleicht gerade deshalb — häufig übersehenen Verletzungen im Bereich des Fußes [1]. Sie treten oft begleitend mit anderen Erkrankungen, zum Beispiel mit Bandläsionen oder Fehlstellungen des Sprunggelenks auf, was die Diagnostik erschwert.
Article
Full-text available
Total hip arthroplasty (THA) is a safe and successful procedure for the treatment of osteoarthritis. One of the most common postoperative problems remains persistent hip pain. The arthroscopic evaluation of persistent hip pain following THA can be a valuable diagnostic tool in a select number of patients when carried out by experts in this techniqu...
Article
Full-text available
An extension deficit of the elbow joint can be caused by various pathologies such as arthroliths, posttraumatic scar tissues, synovitis, capsular fibrosis of the anterior joint compartment, osteophytes in the area of the olecranon fossa or osteochondral lesions (OCL). Arthroscopic treatment is a good therapeutic option for theses pathologies. We pe...
Article
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This study was designed to evaluate whether the mechanical axis deviation (MAD) of the leg correlates with an increased hip alpha angle as described by Nötzli, which is associated with femoroacetabular impingement (FAI). In a retrospective analysis, standing full-length anteroposterior radiographs were analysed in patients who suffered from symptom...