Achim Preiss

HELIOS ENDO-Klinik Hamburg · Orthopädische Chirurgie

Zusammenfassung Bouldern erfreut sich zunehmender Beliebtheit und wurde 2020 olympisch. Da kein größeres Sportequipment notwendig ist, kann jeder, selbst mit geringer Vorkenntnis, damit beginnen. Trotz der geringen Kletterhöhe birgt diese Sportart Verletzungsrisiken, insbesondere der unteren Extremität, durch unkontrollierte (Matten-) Stürze. Die T...

PurposeThe purpose of this study was to evaluate the clinical outcomes of patients who were treated with an arthroscopic popliteus bypass (PB) technique, in cases of a posterolateral rotational instability (PLRI) and a concomitant posterior cruciate ligament (PCL) injury of the knee.Methods This was a retrospective case series in which 23 patients...

PurposeThis study aimed to compare the biomechanical properties of the popliteus bypass against the Larson technique for the reconstruction of a combined posterolateral corner and posterior cruciate ligament injury.Methods In 18 human cadaver knees, the kinematics for 134 N posterior loads, 10 Nm varus loads, and 5 Nm external rotational loads in 0...

Aims and Objectives Injuries of the posterior cruciate ligament (PCL) are most often accompanied by injuries of the posterolateral corner (PLC) and the ligamentum collaterale fibulare (LCL). This leads to a combined dorsal- and external rotational instability. Prior to this study a novel arthroscopic technique was developed to treat posterolateral...

Anterior cruciate ligament (ACL) ruptures are often concomitated by posterolateral bone bruise in the MRI. This is caused by a ventral subluxation of the tibia and impact of the femur in the posterolateral tibia plateau. In some cases, this impact causes a fracture of the posterolateral tibia plateau, the so-called Apple-Bite-Fracture. The increase...

Zusammenfassung Kniegelenkluxationen und -luxationsfrakturen sind selten. Die Komplexität des Kniegelenks sowie die Nähe zu Nerven und Gefäßen können zu einer Vielzahl von Komplikationen und Begleitverletzungen führen. Häufig sind Kniegelenkluxationen Folge eines Hochrasanztraumas. Die Verletzung kann jedoch auch bei geringerer Krafteinwirkung beob...

Purpose This study was conducted to investigate patients’ expectations on high tibial osteotomies, distal femur osteotomies, and double-level osteotomies in different health-related domains. It was hypothesized that expectations are high in terms of capacity to work, pain relief, and restoring knee function. Methods A total of 264 patients (age 47...

Anatomic reconstruction of the popliteus tendon and arcuate complex results in superior functional and a biomechanically more stable outcome compared with extra-anatomic techniques in posterolateral rotatory knee instability. Although specific characteristics of the femoral and fibular footprint of the anatomic posterolateral reconstruction have be...

Durch vermehrte sportliche Aktivität nehmen Verletzungen des vorderen Kreuzbands (VKB) im Wachstumsalter zu. Die Anatomie mit offenen Wachstumsfugen erfordert ein besonderes Vorgehen bei der Behandlung. Die klinischen Ergebnisse der konservativen Therapie bei Kreuzbandverletzungen im Wachstumsalter sind der operativen Versorgung unterlegen. Die tra...

Injuries of the posterior cruciate ligament (PCL) are most often accompanied by injuries of the posterolateral corner (PLC) and the ligamentum collaterale fibulare (LCL). This leads to a combined dorsal- and external rotational instability. In Germany most of these types of injuries are treated by an arthroscopic reconstruction of the PCL and combi...

Die Versorgung von medialen und posteromedialen Kollateralbandverletzungen basiert auf der Kenntnis der anatomischen Strukturen und deren komplexem funktionellem Zusammenspiel. Das posteriore oblique Ligament (POL), der M. semimembranosus und der Innenmeniskus bilden eine funktionelle Einheit, in welcher der Innenmeniskus wie ein Bremsklotz, statis...

Wesentliche Faktoren für den langfristigen klinischen Therapieerfolg bei der Versorgung von dislozierten intraartikulären Tibiakopffrakturen beinhalten neben der operativen Korrektur der Gelenkgeometrie, der Tibiakopfbreite, der Adressierung von ligamentären oder Meniskusverletzungen die Wiederherstellung der Gelenkflächenkongruenz. Insbesondere in...

PurposeThe primary purpose of the study was to gain insight into geometric changes of the patellar height (PH) and posterior tibial slope (PTS) after a biplanar ascending medial open-wedge high tibial osteotomy (HTO) compared to biplanar descending medial open-wedge HTO in patients with genu varum. Methods Sixty-four patients (mean age 45.2 ± 8.7 y...

Background After combined treatment of injuries of the posterior cruciate ligament (PCL) and the posterolateral corner (PLC) with extra-anatomical and minimally invasive augmentation by Larson’s procedure, a significant dorsal residual instability often remains. Better results are described with anatomical techniques; however, these techniques are...

Nach erfolgreicher osteosynthetischer Versorgung stellt sich grundsatzlich die Frage nach der Materialentfernung. Technische Schwierigkeiten finden sich je nach Literatur in bis zu 20 % der Falle. Es muss deshalb geklart werden, welches Material entfernt werden sollte. Eine generelle Empfehlung zur Materialentfernung gibt es nicht, die Indikation i...

Background: Currently existing classifications of tibial plateau fractures do not help to guide surgical strategy. Recently, a segment-based mapping of the tibial plateau has been introduced in order to address fractures with a fracture-specific surgical approach. The goal of the present study was to analyze incidence and fracture specifics accord...

Due to an increase in sporting activities, the number of injuries of the immature knee is continuously increasing. These injuries necessitate a special approach regarding the particular anatomical situation with open growth plates. Three of the most commonly occurring injuries are rupture of the anterior cruciate ligament, patella dislocation and m...

Aims and Objectives: Due to open femoral physis, the therapy of patellar instability in children and adolescents is challenging. We developed a surgical technique, modified form of the "Adductor-Sling-Technique" by Sillanpää which offers a surgical treatment to avoid damage to the femoral physis. The purpose of this study is to determine whether th...

Objective: To analyze the anatomic accuracy of fracture reduction controlled by fluoroscopy as compared to arthroscopically assisted reduction ("fracturoscopy") in patients with complex tibial plateau fractures (AO/OTA 41-C). Quality of fracturoscopy-guided reduction was checked with postoperative computed tomography (CT). Design: Prospective ob...

Abstract Objective. An arthroscopic technique for the reconstruction of the posterolateral corner combined with posterior cruciate ligament (PCL) reconstruction was developed. Indications. Posterolateral rotational instabilities of the knee. Combined lesions of the PCL, the popliteus complex (PLT) and the posterolateral corner. Isolated PLT lesions...

Multiple treatment concepts for patella dislocations have been described in the past. Redislocation rates are high if undifferentiated therapies are applied. Redislocation rates can be significantly reduced and clinical outcome improved, if underlying pathologies are respected. Entities such as patella instability, patella maltracking and loss of p...

Purpose With combined PCL reconstruction and a minimal invasive (extra-anatomical) Larson’s procedure, dorsal instability can be reduced by about 50–70 %. Better results are described by open and more anatomical procedures. In this study, a new, standardized, arthroscopic technique for anatomical popliteus tendon (PLT) reconstruction is evaluated.

Background. Arthroscopic assisted fracture fixation gains clinical importance in the treatment of fractures around the knee.Objectives. The goal of the present study was the presentation of indications and concepts of arthroscopically assisted treatment of fractures of the knee joint as well as weighing their advantages and disadvantages as well as...

Background. The superficial and deep medial collateral ligaments and the posterior oblique ligament (sMCL, dMCL and POL) are the main structures of the medial aspect of the knee.Biomechanics. The sMCL is the most important stabilizer against valgus stress; in addition, it acts against rotation. The dMCL is an additional stabilizer against valgus st...

Background In the context of acute knee dislocations, suture repair of ruptured cruciate ligaments leads to good clinical results in 80% of cases. Disadvantages are low primary stability and subsequently secondary elongation of the sutured ligaments. In the present study, we compared primary stability of suture repair, reinforced by different sutur...

This practical and instructional guidebook, written by international experts in anterior cruciate ligament (ACL) reconstruction, covers all challenging aspects of ACL rupture in the acute and chronic setting. It covers the latest, spectacular anatomical findings, treatment of partial ACL tears, various techniques for single- and double-bundle ACL r...

With combined PCL reconstruction and a minimal invasive (extra-anatomical) Larson's procedure, dorsal instability can be reduced by about 50-70 %. Better results are described by open and more anatomical procedures. In this study, a new, standardized, arthroscopic technique for anatomical popliteus tendon (PLT) reconstruction is evaluated. In 13 ca...

Reconstruction of knee stability by primary ligament sutures and additional augmentation after knee dislocation. Acute knee dislocation Schenck type III and IV. Operative treatment should be performed within 7 days after injury. Chronic instability after knee dislocation, refixable bony avulsions, critical soft tissue, infection, lack of compliance...

Wiederherstellung der Kniegelenksstabilität durch primäre Kreuzbandnähte und Fadenaugmentationen im Rahmen einer Kniegelenksluxation.Kniegelenksluxationen Typ III und IV nach Schenck im Akutstadium. Die operative Versorgung sollte wenn möglich innerhalb der ersten 7 Tage nach Trauma erfolgen.Chronische Instabilitäten nach Kniegelenksluxation, refix...

Injuries of the posterior cruciate ligament (PCL) occur as isolated or as combined knee ligament injuries. The main cause is a direct blunt trauma to the proximal tibia or a fall on the flexed knee. Isolated injuries show good clinical results after conservative treatment, while combined injuries, affecting the posterolateral corner additionally, s...

As more children and adolescents are involved in sporting activities, the number of injuries to immature knees rises. We will focus on three entities: ruptures of the anterior cruciate ligament, patellar dislocation, and meniscal injuries. There is a trend in recent literature toward early reconstruction of the anterior cruciate ligament in childre...

Die Verletzung des medialen Kollateralbandes (,,medial collateral ligament“, MCL) ist eine der häufigsten ligamentären Verletzungen des Kniegelenks. Anamnese, klinische Untersuchung und die Magnetresonanztomographie (MRT) gehören zum diagnostischen Algorithmus. Zu unterscheiden sind komplette Rupturen von Teilrupturen. Die exakte Klassifizierung de...

The medial collateral ligament complex (MCL) is the most commonly damaged ligamentous stabilizer of the human knee. The diagnostic algorithm comprises patient history, clinical examination and magnetic resonance imaging (MRI). It is important to distinguish between incomplete and complete ruptures of the MCL. For adequate treatment the classificati...

The aim of the study was to examine whether a rupture of the anterior cruciate ligament (ACL) in patients with open growth plates should be treated conservatively or operatively. An electronic search was performed in MEDLINE, the Cochrane controlled trial register, Embase, and Medpilot. Ten studies including 154 patients were analyzed regarding con...

Osteochondritis dissecans of the talus (ODT) describes a special entity of osteochondral lesions of the talus (OLT) which has to be distinguished from acute traumatic lesions. Its exact etiology still remains uncertain with multiple predispositioning factors being discussed. Following the knee and elbow, the ankle joint with 4% is the third most af...

Meniscal tears in childhood are rare and in most cases are caused by trauma or are associated with a discoid meniscus. We report on a 6-year-old female patient with a lateral discoid meniscus of the left knee. After partial meniscectomy she developed dysplasia of the lateral femoral condyle. The presented case demonstrates the impact of a meniscect...

Background In a systematic literature analysis on the treatment of anterior cruciate ligament rupture in immature patients it could be shown that the clinical results of conservative therapy are unsatisfactory. In particular this is reflected by persisting instability with a positive giving way phenomenon in approximately 89 % of cases. Methods The...

Reduction and fixation of bony avulsions of the posterior cruciate ligament (PCL) through a minimally invasive dorsal approach to restore stability of the knee joint. Prevention of soft tissue damage through a minimally invasive procedure and achieving early functional rehabilitation by stable osteosynthesis. Bony tibial avulsions of the PCL and si...

Medial collateral ligament reconstruction in chronic unstable knees. Chronic instability of the medial collateral ligament (MCL) isolated or in combination with multiligament injuries. Refixable bony avulsions, limited range of motion, arthrofibrosis, severe valgus deformity, infections, critical soft tissue, lack of patient compliance and open gro...

Objective Reduction and fixation of bony avulsions of the posterior cruciate ligament (PCL) through a minimally invasive dorsal approach to restore stability of the knee joint. Prevention of soft tissue damage through a minimally invasive procedure and achieving early functional rehabilitation by stable osteosynthesis. Indications Bony tibial avuls...

Purpose Treatment of knee dislocation is still controversial. There is no evidence to favour ligament suture or reconstruction. Until now, no meta-analyses have examined suture versus reconstruction of cruciate ligaments in knee dislocations with respect to injury pattern and rupture classification. Methods We searched Medline, the Cochrane Control...

The aim of the study was to examine whether a rupture of the anterior cruciate ligament (ACL) in patients with open growth plates should be treated by surgery or conservatively. An electronic search was performed in MEDLINE, the Cochrane controlled trial register, Embase, and Medpilot. Ten studies including 154 patients were analyzed regarding cons...

Unlabelled: Pelvic floor hernias are extremely rare. This study presents a successfully treated case of primary perineal hernia and takes a look at the existing literature. Case: The case of a 75-year-old female patient with a great perineal hernia is presented. Diagnosis was secured by magnetic resonance tomography. The pelvic defect was succes...

Hernia repair evolved from pure tissue repair to mesh repair due to decreased recurrence rates. However, concern exists about mesh-related infections occurring even several years after initial operation. Therefore, a polyvinylidenfluoride (PVDF) mesh material was constructed and surface modified by plasma-induced graft polymerization of acrylic aci...

Im Rahmen dieser tierexperimentellen Studie erfolgte sowohl die in-vitro als auch die in-vivo Analyse eines mittels Polyacrysäure beschichteten und mit Gentamicin funktionalisierten PVDF-Netzmaterials zur Infektionsprophylaxe bei Hernienreparationen. Durch den Agardiffusionstest konnte gezeigt werden, dass aktives Gentamicin auf dem funktionalisier...