Cementation Technique Research Articles

Combination of cellulose nanofiber and artificial fusion protein for biocementation

Biomineralization occurring in living organisms is mostly controlled by organic macromolecules such as polysaccharides and proteins. Recently, biomineralization has been attracting much attention as a green and sustainable cementation technique including enzyme-induced carbonate precipitation (EICP), where CaCO3 is formed by hydrolysis of urea by urease in the presence of calcium ions. In this study, we have developed a novel hybrid biocementation method combining CaCO3 and cellulose nanofiber (CNF). In nature, matrix proteins work as a binder at the interface of organic and inorganic materials to form hybrid biomaterials. By mimicking the natural system, we designed an artificial fusion protein to facilitate the deposition of CaCO3 on CNF. Calcite-binding peptide (CaBP) and carbohydrate-binding module (CBM) were introduced in the artificial fusion protein CaBP-CBM to connect CaCO3 and cellulose. The addition of CNF in the EICP system resulted in the formation of a number of small particles of CaCO3 compared to a non-additive system. The addition of the fusion protein CaBP-CBM to CNF led to an increase in the size of CaCO3 particles. Furthermore, the combination of CaBP-CBM and CNF provides higher strength of samples in sand solidification. Therefore, introduction of CNF and the fusion protein would be promising for novel biocementation techniques.

Water quality analysis based on the presence of aquatic macroinvertebrates applied to water springs covered with soil-cement technique

Human activities, such as deforestation and inappropriate waste disposal have had negative impact on watercourses, including water spring areas. The soil-cement technique is a low-cost and easily implementable option to safeguard water springs and to preserve watercourses. The aim of the preset study is to assess water quality in water springs in Prudentópolis City, Brazil by using this technique based on aquatic macroinvertebrate communities and land use in this location. In total, 1,236 macroinvertebrates belonging to 18 taxa were collected from 5 water springs. Species belonging to family Chironomidae prevailed in points A, B, C and E, since they represent approximately 42% of all collected insects. Tree Cover was the primary land use form in the assessed points. According to Canonical Correspondence Analysis (CCA), different taxonomic groups had different responses to the assessed environmental factors. In conclusion, soil preservation, sustainable management and the cement technique, in combination to a set of preventive actions, were effective measures to ensure the conservation of aquatic ecosystems and water quality.

Kutu Sementasyon Tekniğiyle GGG70 Küresel Grafitli Dökme Demir Yüzeyine Kaplanan NbC Tabakasının Özelliklerine Kaplama Sıcaklığın Etkisin İncelenmesi

Nodular Graphite Cast Irons stand out with their high castability, high strength, vibration damping and high loading capacity. With today's technologies, the surface properties of materials can be improved by coating them with various methods and high-performance engineering materials can be obtained. Pack Cementation Technique is preferred among coating methods due to its relatively lower cost and applicability. In this study, it was aimed to coat NbC on the surface of GGG70 Nodular Graphite Cast Iron using the Pack Cementation Technique at 900 °C, 1000 °C and 1100 °C for 6 hours. The effect of temperature on the properties of the resulting coating layers was investigated. For this purpose, the surface morphologies of the samples were examined and their fracture toughness and hardness values were obtained. Coating morphologies were examined by XRD, optical microscope and SEM analysis and changes in coating structure and thickness were obtained. When the results were examined, it was determined that the coating thickness increased with the increase in coating temperature. Accordingly, it was observed that the fracture toughness value of the coatings first increased and then decreased slightly. Microhardness values increased approximately 5 times in the coating areas.

Unlocking the Secrets of Post-Surgical Flexion: The Vital Role of Rehabilitation in Total Knee Arthroplasty Recovery

This article delves into the critical aspect of postoperative flexion, particularly in the context of total knee arthroplasty (TKA), commonly known as total knee replacement. Postoperative flexion serves as a pivotal metric for assessing the success of the procedure and a patient’s ability to regain functional knee movement. The exploration encompasses the desired range of post-surgery flexion, the surgical factors influencing it, and the indispensable role of rehabilitation in facilitating patients in achieving functional flexion. The study tracks the progress of 713 patients who underwent total knee arthroplasty utilizing the cemented technique, categorizing them based on whether they received non-steroidal anti-inflammatory drugs for postoperative treatment. The monitoring of prosthetic and knee complications, along with the evaluation of the Knee Association Score (KSS) for functional assessment, revealed postoperative complications in approximately 18.23% of the patient cohort. These complications were predominantly associated with a restricted range of motion (ROM < 90°) and patellar clunk syndrome. Significantly, the KSS scale exhibited notable enhancements in the quality of life at 12 months post-surgery compared to preoperative and 6-month assessments. The majority of patients achieved scores classified as good or excellent, underlining the positive impact of the surgical approach and postoperative management on functional outcomes and overall patient well-being.

Monolithic Zirconia in Dentistry: Evolving Aesthetics, Durability, and Cementation Techniques – An In-depth Review

Monolithic Zirconia in Dentistry: Evolving Aesthetics, Durability, and Cementation Techniques – An In-depth Review

Current design and cement mantle thickness in hip arthroplasty : Theory and analysis of register data

In this article, an overview and comparison of the most commonly used cemented hip stems, grouped into different stem types and cement mantle thickness, is given to see which combination performs well. Revision rates of cemented stem types were categorized from the Endoprosthesis Register-Germany, and 3‑ and 5‑year revision rates were reported and analyzed. For the research, the focus was on the Exeter, C‑Stem, MS-30, Excia, Bicontact, Charnley, Müller straight stem, Twinsys, Corail, Avenir, Quadra, and the Lubinus SPII stems. An important aspect was which stem is preferred to be implanted and which cementing technique is used with regard to the planned cement mantle thickness. In order to identify atrend in cemented hip arthroplasty, data from the Danish, Swedish, Norwegian, Swiss, New Zealand, English and Australian arthroplasty registers were also compared. Most countries use cemented prostheses according to the taper slip principle (Exeter, MS30, C‑Stem etc) or the composite beam (Charnley, Excia, Bicontact), which are implanted with acement mantle thickness of 2-4 mm. However, atrend has emerged in Germany and Switzerland towards the line-to-line technique, with aplanned cement mantle thickness of 1 mm (Twinsys, Corail, Avenir, Quadra), following the principle of the Müller straight stem prosthesis and the Kerboul-Charnley prosthesis, even though these are postulated to be "French paradoxes" in themselves. In the EPRD 5‑year results, the newer line-to-line prostheses seem to perform slightly worse. The best results are achieved by the "MS30" in Germany and the "Exeter" in England. These are polished straight stems with centralizer and subsidence space at the apex with a2-4 mm cement mantle in good cementing technique.

Radiological evaluation of cemented acetabular component in primary total hip arthroplasty with or without interface bioactive bone cement technique

PurposeWe evaluated the medium-term radiological outcomes of the interface bioactive bone cement (IBBC) technique used in the acetabular component in primary cemented total hip arthroplasty (THA). MethodsIn total, 79 patients (88 hips) who underwent primary THA at our hospital between January 2004 and April 2009 were divided into the non-IBBC (NIBBC; n ​= ​39 patients, 44 hips) and IBBC (n ​= ​40 patients, 44 hips) groups. A clear zone (CZ) at the cement-bone interface around the cup was evaluated 5 and 10 years postoperatively. The CZ score, which indicates the spread of the CZ, and loosening of the cup (CZ ​> ​2 ​mm on all sides or movement of the cup >4°) were also evaluated. ResultsNo patient had loosening of the cup. The mean patient age at surgery was 66.5 ​± ​9.2 years in the NIBBC group and 61.9 ​± ​7.7 years in the IBBC group (p ​= ​0.012). At 5 years postoperatively, the incidence of CZ was 36.4 ​% in the NIBBC group and 18.2 ​% in the IBBC group (p ​= ​0.056). At 10 years postoperatively, the incidence of CZ was 36.4 ​% in the NIBBC group and 20.1 ​% in the IBBC group (p ​= ​0.098). Age at surgery (p ​= ​0.045) significantly affected the incidence of CZ at 5 years but not at 10 years. The IBBC technique (p ​= ​0.042) and age at surgery (p ​= ​0.028) significantly affected the CZ score at 5 years. The IBBC technique (p ​= ​0.036) significantly affected the CZ score at 10 years. ConclusionsThe IBBC technique resulted in a significantly lower CZ score than the NIBBC technique in patients undergoing THA.

The third-generation modern cementing technique in hip and knee arthroplasty

Implant loosening is the most common reason for revision surgery. Contribution of modern cementing technique to the long-term stability of an implant. Evaluation of the available evidence on modern cementing technique. Modern cementing technique in hip arthroplasty is considered established and leads to better cementing results. In knee arthroplasty, there are also specific recommendations, including intensive cleaning of the bone bed, mixing of bone cement under vacuum and application of bone cement to the implant and the bone. The use of modern cementing technique in hip and knee arthroplasty facilitates cementing, increases safety, and minimizes the risk of mechanical loosening.

Current Insights on Fiber Posts: A Narrative Review of Laboratory and Clinical Studies.

The aim of this study was to review the literature related to the clinical performance and laboratory findings regarding fiber posts, as well as the cementation technique employed with their use. A literature search was performed using an electronic database, PubMed/Medline, between 2010 and 2023. The terms used were "intra coronal post, fiber post, post cementation, and post length". Titles and abstracts were initially screened, and a full-text assessment was conducted for those that fulfilled the inclusion criteria. The reference list of the collected papers was also screened for further relevant citations. In this work, 135 potentially eligible studies were analyzed. Titles and abstracts of 90 studies followed the inclusion criteria and were selected for a full-text assessment, resulting in 50 studies selected. Moreover, additional studies from relevant citations were included, totaling 57 studies. According to the laboratory and clinical studies revised, the survival rate between fiber and prefabricated and cast metal posts was similar, and failures were mainly related to the loss of retention. The intra-canal post length of less than two-thirds of the root length presented successful results when ferrule was present. Furthermore, the ferrule increased the longevity of teeth restored with fiber posts. Additionally, the use of a surface treatment protocol for fiber posts and the adhesive cementation technique both contributed to the clinical success and longevity of the intra-canal post.

KNOWLEDGE OF DENTAL SURGEONS IN THE SELECTION AND CEMENTATION OF FIBERGLASS POSTS

The aim of this study is to record the knowledge of dentists in relation to the selection and cementation technique of the fiberglass post in the daily routine of dental professionals to check which fiberglass post brand and anatomy are most used; to describe the reasons that lead the professionals to choose this technique, as well as analyze the types of cement available and the one most used by dentists in cementing the fiberglass post. In addition to helping dental students with information on the topic, taking into account the fact that this type of retainer is a great choice for the reconstruction of endodontically treated teeth, as it is a cost-effective material, it is resistant to chewing forces, aesthetic and simple technique. To carry out the research, an electronic questionnaire was applied, with objective questions for dental students from Faculdade Patos de Minas (FPM), via a Google Forms form, aiming to acquire data on how the dentists use the fiberglass post. Given the results obtained, among the materials used for cementing the post, there was a great preference for dual resin cement, as it has a good adhesion and resistance, however, it has an unsatisfactory polymerization. Furthermore, it was observed that the self-adhesive resin cement launched on the market recently has been highly praised for presenting several advantages. It is concluded that dual resin cement is the most used by dentists in dental offices today, but self-adhesive cement has been the best choice, as it presents properties similar to previous cements and resistance equivalent to conventional cements according to the literature researched.

Solidification treatment of rare earth tailings by a renewable biological cementation method

Rare earth mineral is a kind of polymetallic co-associated mineral, in addition to containing iron, rare earth, niobium, and a certain amount of thorium and uranium. The tailings after wet leaching of rare earth are both a kind of hazardous waste and a kind of potential strategic resource. Therefore, the treatment and disposal of rare earth tailings should not only achieve the purpose of risk control, but also cannot affect the subsequent reuse. Microbially induced calcium carbonate precipitation (MICP) as an environmentally friendly biological cementation technique, it can solidify the tailings and stabilize the polluting elements. The valuable elements in the tailings can be further recovered after the sample solidified by MICP is decomposed by acid. In this study, a strain of urease-producing bacteria (K-1) with excellent performance was screened by dilution culture method from rare earth tailings. Through physiological and biochemical analysis and 16 s rDNA analysis, the strain K-1 belonged to the genus Lysinibacillus. In the mold, strain K-1 was used to induce the formation of calcium carbonate for cementing rare earth tailings, the strength of the cured body after cementation can reach 1.73 MPa after 28 d. There was a significant reduction in the leaching of heavy metals and radionuclides in the cured body. The results obtained from the scanning electron microscopy (SEM) and X-ray diffraction (XRD) indicated that strain K-1 induced a large amount of calcium carbonate, whose crystal forms are vaterite and calcite. The calcium carbonates cemented the rare earth tailings together for tighter texture and reduced porosity. The X-ray fluorescence (XRF) analysis of the rare earth tailings before and after solidification and after acid decomposition showed that the loss of rare earth elements in rare earth tailings after MICP treatment was small. Moreover, the cured body was relatively easy to dissociate, which facilitated the recovery and reuse of potential valuable elements in the tailings. This study provides technical support for the long-term storage of rare earth tailings and the sustainable development of the rare earth industry.

Cementing Techniques In Knee Surgery (CeTIKS).

Aseptic loosening is the most common cause of failure following cemented total knee arthroplasty (TKA), and has been linked to poor cementation technique. We aimed to develop a consensus on the optimal technique for component cementation in TKA. A UK-based, three-round, online modified Delphi Expert Consensus Study was completed focusing on cementation technique in TKA. Experts were identified as having a minimum of five years' consultant experience in the NHS and fulfilling any one of the following criteria: a 'high volume' knee arthroplasty practice (> 150 TKAs per annum) as identified from the National joint Registry of England, Wales, Northern Ireland and the Isle of Man; a senior author of at least five peer reviewed articles related to TKA in the previous five years; a surgeon who is named trainer for a post-certificate of comletion of training fellowship in TKA. In total, 81 experts (round 1) and 80 experts (round 2 and 3) completed the Delphi Study. Four domains with a total of 24 statements were identified. 100% consensus was reached within the cement preparation, pressurization, and cement curing domains. 90% consensus was reached within the cement application domain. Consensus was not reached with only one statement regarding the handling of cement during initial application to the tibial and/or femoral bone surfaces. The Cementing Techniques In Knee Surgery (CeTIKS) Delphi consensus study presents comprehensive recommendations on the optimal technique for component cementing in TKA. Expert opinion has a place in the hierarchy of evidence and, until better evidence is available these recommendations should be considered when cementing a TKA.

Micromotion measurement at the interfaces of cemented tibial endoprosthetic replacements: A new standardized in vitro model using open-cell rigid foam.

Early aseptic loosening following primary total knee arthroplasty related to several factors might appear at the interface implant-cement or cement-bone. A standardized in vitro model might provide information on the relevance of single variable parameter of cementation including technique and cement respectively bone structure on fixation strength. Micromotion measurement using different directions of load should detect the primary stability of the interfaces. An open-cell rigid foam model was used for cementation of PFC-Sigma tibial trays with Palacos®. Pins were applied to the model for continuous non-destructive measurement. Relative micromotions for rotation, valgus-varus and extension flexion stress were detected at the interfaces as well as cement penetration was measured. The reproducibility of the measurement could be shown for all interfaces in extension-flexion movements. For rotation a negative trend was shown for the interface cement-prosthesis and cement-bone concerning varus-valgus stress reflecting varying surgical cementation technique. More micromotion related to extension-flexion force might reflect the design of the implant. Measurement of relative micromotion and cement distribution appear accurate to detect small differences of movement at different interfaces of cemented tibial implants and the results are reproducible for most parameter. An increased number of specimens should achieve statistical relevance for all measurements.

Shade selection for natural tooth color replication on porcelain laminate veneers

The final color of dental ceramics depends on different factors such as light source, substrate, and selected material (thickness, contour, and texture). Objective: To report a clinical case in which a predictable protocol is used to optimize the final color of porcelain laminate veneers. Case report: A male patient attended the dental clinic dissatisfied with the composite resin restorations made on his upper anterior teeth. After anamnesis and clinical examination, it was suggested that the resin restorations be replaced by laminated porcelain veneers. A diagnostic wax-up was performed. The mock[1]up was also used to evaluate the aesthetic length for replicating the details of the incisal edge and the shape and size of the embrasures. The shade was selected before composite resin removal to avoid dehydration of the dental substrate. A photograph was taken to guide the selection of colors in different thirds. After removing the restorations, another photograph was taken to evaluate the color of the substrate. The impression was taken with 000 retractor wire and addition silicone. The laminates were made with pressed ceramic and feldspathic porcelain veneers were subsequently applied by layering the layers of dentin, incisal edge and enamel based on the waxing diagnosis. After approval by the patient, a conventional cementation technique was performed. The occlusal adjustment was made with rubber polishing cups and the anterior and lateral guides were checked. Conclusion: The protocol recommended for successful selection of the color of a porcelain laminate relies on the combination of knowledge of concepts, resources such as shade guides, spectrophotometers, and photographs, and porcelain application and characterization techniques performed by the technician and luting techniques by the dentist.

CEMENTING TECHNIQUES IN KNEE SURGERY (CETIKS): A UK EXPERT CONSENSUS STUDY

AbstractIntroductionAseptic loosening is the most common cause of failure following cemented total knee arthroplasty (TKA) and this has been linked to poor cementation technique. We aimed to develop a consensus on the optimal technique for component cementation in TKA.MethodologyA UK based, three round, online modified Delphi Expert Consensus Study was completed focussing on cementation technique in TKA. Experts were identified as having a minimum of 5 years Consultant experience in the NHS and fulfilling any one of the following three criteria:· A ‘high volume’ knee arthroplasty practice (>150 TKA per annum) as identified from the National joint registry (NJR).· A senior author of at least 5 peer reviewed articles related to TKA in the previous 5 years· A named trainer for a post CCT fellowship in TKA.ResultsEighty-one experts (Round 1) and eighty experts (Round 2 and 3) completed the Delphi Study. Four domains with a total of twenty-four statements were identified. 100% consensus was reached within the cement preparation, pressurisation, and cement curing domains. 90% consensus was reached within the cement application domain. Consensus was not reached with only one statement regarding the handling of cement during initial application to the tibial and/or femoral bone surfacesConclusionThe CeTIKS expert consensus study presents comprehensive recommendations on the optimal technique for component cementation in TKA. Expert opinion has a place in the hierarchy of evidence and until better evidence is available these recommendations should be considered when cementing a TKA.

Translated article] Tumor ablation and vertebral augmentation in the treatment of vertebral metastases: A multicenter study

IntroductionTreatment of metastatic vertebral fractures without neural compression is performed with percutaneous cementation techniques. The increase in intratumoral pressure by these techniques can send tumor cells into the bloodstream. To prevent this dissemination and improve pain treatment, ablation techniques have been introduced that would allow the creation of a cavity in the tumor prior to cementation or directly necrosing the metastasis when its size is small. MaterialWe present the experience with ablation of two hospitals and two different ablation techniques. The first group used radiofrequency ablation (A) in 14 patients (26 vertebrae), 4 of whom underwent vertebral arthrodesis. The second group used microwave ablation (B) in 93 patients (129 lesions) without associated vertebral instrumentation. ResultsIn group A pain improvement in VAS was 7.7–2.6 at 6 weeks. There were no complications derived from the ablation. In most cases cementation was associated. In the group B pain improvement in VAS went from 6.8 to 1.7 at 6 weeks. Cementation was associated in all cases. There were no complications derived from the ablation. ConclusionThe association of ablation techniques with vertebral cementation is a safe technique that significantly improves the patient's pain and can help control the disease.

Sequential recovery of copper, nickel, gold, silver and zinc from WPCBs of obsolete mobile phones through hydrometallurgical recycling

Waste printed circuit board (WPCB) of an obsolete mobile phone is a valuable source of base and precious metals. Alternatively, WPCBs also contain various lethal and toxic constituents which introduce ecological impacts while landfilling and incineration. Recycling WPCB is essential to reduce the environmental effects and to recover valuable metals. This article employs a hydrometallurgical route for the sequential recovery of copper, nickel, gold, silver and zinc from WPCBs through leaching, solvent extraction and cementation processes. Initially, the metal clads of WPCBs are used for the leaching of copper, nickel and other base metals without any selective dissolution of gold and silver. Optimal results revealed that dilute nitric acid at room temperature provides effective leaching (99.9%) of copper, nickel and zinc by leaving precious metals gold and silver in the residue. The utilization of phenolic oxime as a solvent extraction reagent revealed the selective recovery of copper and nickel from the leach liquor individually. The availed residue is dissolved in the halide salts in the presence of acidic conditions showing the quantitative dissolution of gold and silver. Solvent extraction with amide-based reagents recovered gold by leaving the silver-rich raffinate. A cementation technique with copper powder is implemented for the precipitation of silver. The proposed approach delivers an effective, eco-friendly and economically feasible process for the sequential recovery of metallic values from WPCBs of obsolete mobile phones.

Relationship Between Various Cement Mixture, Cement Fixation and Gait Study for Total Hip Replacement Via Finite Element Analysis (FEA)

To secure the total hip replacement (THR) components, introduced in the 1960s, polymethyl methacrylate (PMMA) bone cement was used as a fixation. The cement polymerizes and becomes firm to hold the implant in place. However, the failure of cement in total hip replacement may lead to hip fractures and dislocations which is detrimental to the patient’s well-being whether in the short-term or long-term. Hence, the aim of this study is to find suitable cement mixtures for total hip replacement compromising of Young Modulus of 2.24 GPa, 0.3129 GPa, 0.03394 GPa and 0.07961 GPa, as reported from prior research. Three separate sorts of proximal cemented techniques were used to deposit the PMMA cement: 40 mm cement reduction, 80 mm cement reduction and full cement (datum). The Titanium Ti-6A1-4V (Ti-41) Charnley hip implant stem model with a Young Modulus of 100 GPa and a Poisson’s ratio of 0.3 was applied in the ANSYS Workbench 2020 R2 software to be analyzed with the three different proximal cemented approaches for each cement mixtures. Subsequently, the total deformation and von Mises stress were simulated under various loading circumstances, including standing, walking, stair climbing and falling. Nevertheless, as shown in the results obtained, all the hip implants consider safe because their von Mises stress does not exceed the yield strength of Titanium Ti-6A1-4V, which is 0.88 GPa. Finally, it may be concluded that, in comparison to the full cement (datum) and 80 mm cement reduction with Young Modulus of 2.24 GPa, 0.3129 GPa, 0.03394 GPa and 0.07961 GPa, the most improvement in the context of total deformation and von Mises stress is the 40 mm cement reduction with Young Modulus of 2.24 GPa.

Risk Factors with Porcelain Laminate Veneers Experienced during Cementation: A Review.

The clinical success of porcelain laminate veneers (PLVs) depends on many clinical and technical factors, from planning to execution, among which adhesive cementation is of significant importance. This procedure carries many risk factors if not optimally executed. The objective of this study was to document the clinical parameters affecting successful cementation procedures with a focus on the adhesive strength, integrity, and esthetics of the PLVs. A literature search was conducted through MEDLINE, complemented by a hand search using predefined keywords. Articles published in English between 1995 and 2023 were selected. According to this review, the success and longevity of PLVs rely in great part on the implementation of a precise cementation technique, starting from field isolation, adequate materials selection for adhesion, proper manipulation of the materials, the seating of the veneers, polymerization, and elimination of the excess cement. Several clinical steps performed before cementation, including treatment planning, preparation, impression, and adequate choice of the restorative material, could affect the quality of cementation. Scientific evidence suggests careful implementation of this process to achieve predictable outcomes with PLVs. The short- and long-term clinical success of adhesively luted PLVs is tributary to a deep understanding of the materials used and the implementation of clinical protocols. It is also contingent upon all the previous steps from case selection, treatment planning, and execution until and after the cementation.

Aseptic revisions and pulmonary embolism after surgical treatment of femoral neck fractures with cemented and cementless hemiarthroplasty in Germany : An analysis from the Germany Arthroplasty Registry (EPRD)

Femoral neck fractures (FNF) are among the most common fractures in Germany and are often treated by hemiarthroplasty (HA). The aim of this study was to compare the occurrence of aseptic revisions after cemented and uncemented HA for the treatment of FNF. Secondly, the rate of pulmonary embolism was investigated. Data collection for this study was performed using the German Arthroplasty Registry (EPRD). HAs after FNF were divided into subgroups stratified by stem fixation (cemented vs uncemented) and paired according to age, sex, BMI, and the Elixhauser score using Mahalanobis distance matching. Examination of 18,180 matched cases showed a significantly increased rate of aseptic revisions in uncemented HA (p < 0.0001). After 1 month 2.5% of HAs with uncemented stems required an aseptic revision, whereas 1.5% were reported in cemented HA. After 1 and 3years' follow-up 3.9% and 4.5% of uncemented HA and 2.2% and 2.5% of cemented HA needed aseptic revision surgery. In particular, the proportion of periprosthetic fractures was increased in cementless implanted HA (p < 0.0001). During in-patient stays, pulmonary emboli occurred more frequently after cemented HA (0.81% vs 0.53% in cementless HA [OR: 1.53; p = 0.057]). For uncemented hemiarthroplasties a statistically significantly increased rate of aseptic revisions and periprosthetic fractures was evident within a time period of 5years after implantation. During the in-hospital stay, patients with cemented HA experienced an increased rate of pulmonary embolism compared with patients with cementless HA, but this difference was not statistically significant. Based on the present results, with knowledge of prevention measures and the correct cementation technique, the use of cemented HA should be preferred in the treatment of femoral neck fractures.