Bone substitute materials such as calcium phosphate cements (CPC) are frequently used as growth factor carriers for the stimulation of osteoblast-formation around an implant. However, biological modification based on delicate protein factors like extracellular matrix proteins or growth factors is subject to a number of shortcomings like the need for ...

The use of bioactive microspheres as bone filling materials has received much attention due to their ability to fill the bone defects with irregular and complex shapes and sizes. Divalent Mg(2+) modified silicate-based diopside (DIOP: CaMgSi(2) O(6) ) and tetravalent Zr(4+) modified silicate-based baghdadite (BAGD: Ca(3) ZrSi(2) O(9) ) ceramics ...

This article describes a soft tissue surgical modification--the trap door technique--used to enhance contemporary patient esthetic expectations and preserve periodontal health longitudinally. This surgical modification is greatly indicated for single-stage single and multiple implant surgery to preserve the integrity of the papillae and eliminate buccal soft tissue concavity. This procedure ...

Placement of a dental implant and an interim restoration in the esthetic zone immediately following tooth extraction is now a common procedure. However, in such clinical situations, the fabrication of an appropriate interim restoration may be challenging. The aim of this article is to present a technique for modifying the ...

Localized ridge expansion of a deficient edentulous maxillary alveolar ridge segment is a useful technique when the goal of surgery is to provide an increase in ridge width as a means of establishing an adequate alveolar crest capable of receiving endosseous implants. The purpose of this article is to describe ...

The aim of this study is to evaluate the residual monomer content and polymerization shrinkage of a packable composite (Surefil) and an ormocer (Admira). The study was conducted in two parts. In Part I, 10 samples of each material were prepared in a standardized split brass mould, using incremental curing ...

Implant surface topography influences osteoblastic proliferation, differentiation and extracellular matrix protein expressions. Previous researches proved that chemical surface modification of titanium implants could be used to improve Bone-to-implant contact. In this study, the surface topography, chemistry and biocompatibility of polished titanium surfaces treated with mixed solution of three acids containing ...

OBJECTIVES: To evaluate the probing depth at implants with signs of peri-implantitis before and following the removal of the prosthetic reconstructions and its relation with the peri-implant bone level as revealed by open access flap surgery. MATERIAL AND METHODS: Twenty-nine patients with 89 implants with diagnosis of peri-implantitis were included ...

INTRODUCTION: The early treatment of Class III malocclusion with a protraction facemask can produce forward movement of the maxilla but is generally associated with posterior rotation of the mandible and dentoalveolar compensations. This article shows the dental and skeletal effects of intermaxillary elastics applied to temporary anchorage devices in the ...

Titanium surface texture and chemistry modification successfully improves the host response and consequently the bone-to-implant contact surrounding dental implants. The aim of the present study was to investigate, using histomorphometrical-analysis, the effects of titanium surface modification by laser-ablation (Nd:YAG) followed by thin chemical deposition of HA. Forty-eight rabbits received one ...

For assessment of bone remodelling around total hip arthroplasty using dual-emission X-ray absorptiometry (DEXA), a variety of different systems to identify regions of interest (ROI) have been used, making comparisons between stem designs difficult. The Gruen zones are now widely used for this purpose. We present the results of a ...

Abstract Computer guided implant treatment allows implants and associated restorations to be precisely placed at the same procedure directly through the gingiva with reduced post-operative complications and surgical time. When bone height is adequate but very narrow, the virtual guided sleeve is often placed too deeply into the ridge crest ...

Residual excess cement (REC) is a common complication of cement-retained prostheses and has been linked to periimplant disease. Removal of the cement residue may result in resolution of the issue if addressed early in the disease process. However, this is dependent upon the ability to locate and adequately remove the ...

Purpose: Zirconia ceramics are a viable alternative to titanium for use as dental implants. However, the smooth surface of zirconia means that longer healing periods are needed to accomplish osseointegration compared to roughened titanium surfaces. Surface modifications can be used to increase the roughness of zirconia. The aim of this ...

At times, dental implants are placed into sites with a history of periapical pathology. Sometimes the infection is active, and other times the tooth may have been extracted years before implant placement. In either case, the possibility exists for long-term residual cysts or infections that can negatively impact the prognosis ...

Objective. The benefit of bone-anchored implantation (BAI) for the treatment of single-sided deafness (SSD) is well established. In this study, the authors sought to evaluate objective hearing outcomes and subjective benefits in patients undergoing BAI for SSD with residual hearing in the implanted ear.Study Design. Case series with chart review.Setting. ...

The Berlin Heart EXCOR ventricular assist device provides pulsatile ventricular assistance. It can be used for univentricular or biventricular support. However, pre-, intra-, and postoperative complications (e.g., bleeding, anastomotic insufficiency) are frequent. We present herein a detailed description of our modified implantation technique in order to facilitate further clinical use ...

PURPOSE: This article is based on the concept of complete footprint restoration. It introduces a "Modified Insertion Site Table" for individual size-matched single- (SB) and double-bundle (DB) ACL reconstruction, which gives surgical guidelines for graft diameters and drill angles according to the restored tibial insertion site area and geometry. METHODS: ...

Ceramic tiles are widely used by the construction industry, and the manufacturing process of ceramic tiles generates as a major residue mud derived from the polishing step. This residue is too impure to be reused in the ceramic process and is usually discarded as waste in landfills. But the analysis ...

Background:  The rising number of device implantation has seen a parallel in the rising numbers of lead extraction. Herein we have analysed our experience in cardiac device and lead extraction in a single tertiary centre over the last decade. Method:  Retrospective analysis of all consecutive patients undergoing lead extractions performed ...

A 66-year-old man was implanted with a pacemaker. Seven years after implantation he was admitted due to cardiogenic cerebral embolism and warfarin therapy was introduced. After that, he suffered recurrent pericardial effusion for unexplained reasons. An exploratory thoracotomy revealed that the screw of the atrial lead had penetrated through the ...

Conventional surgery for revision of right ventricular outflow tract conduits is complex and demanding. Percutaneous implantation of pulmonary valves may not be feasible in all cases. We describe a safe, alternative hybrid transapical approach from the right ventricle that avoids the extensive dissection and potential complications of revision surgery.

The HeartWare left ventricular assist device (LVAD) is a new addition to the family of second-generation continuous-flow LVADs. The miniaturized dimensions of the HeartWare LVAD provide the opportunity for its safe implantation through nonsternotomy incisions. We present our technique for HeartWare LVAD implantation through bilateral anterior thoracotomy incisions. This technique ...

Summary  Residual ridge resorption in the mandible after tooth loss may lead to worsening of complete denture stability and to various subjective complaints. The aim was to evaluate the association between radiologically assessed residual ridge resorption in the mandible, clinically assessed stability of lower complete denture and subjective complaints among ...

Abramovitz I, Relles-Bonar S, Baransi B, Kfir A. The effectiveness of a self-adjusting file to remove residual gutta-percha after retreatment with rotary files. International Endodontic Journal ABSTRACT: Aim  To test the efficacy of a two-stage retreatment method in which the Self-Adjusting File (SAF) is used to remove root canal filling ...

OBJECTIVES: Two fractured one-piece experimental (commercially unavailable) zirconia implants were analyzed using scanning electron microscope (SEM) analysis to identify failure origins and aid in understanding the failure mechanisms. Modifications to the zirconia implant design are suggested to minimize such fracture incidences. MATERIALS AND METHODS: Two zirconia implants fractured during the ...

The aim of this study was to evaluate the bone tissue response to strontium- and silicon-substituted apatite (Sr-HA and Si-HA) modified titanium (Ti) implants. Sr-HA, Si-HA and HA were grown on thermally oxidized Ti implants by a biomimetic process. Oxidized implants were used as controls. Surface properties, i.e. chemical composition, ...

Dental implant failure often occurs due to oral bacterial infection. The aim of this study was to demonstrate that antibiotic efficacy could be enhanced with modified titanium. First, the titanium was modified by anodization and heat-treatment. Then, a biomimetic coating process was completed in two steps. Surface characterization was performed ...

The preferred use of dual-coil implantable defibrillator lead systems in current implantable defibrillator therapy is likely based on data showing statistically lower defibrillation thresholds with dual-coil defibrillator lead systems. The following review will summarize the clinical data for dual- versus single-coil defibrillator leads in the left and right pectoral implant ...

We are in the midst of a rapidly evolving era of technology-assisted medicine. The field of telemedicine provides the opportunity for highly individualized medical management in a way that has never been possible before. Evolving medical technologies using cardiac implantable devices (CIEDs) with capabilities for remote monitoring permit evaluation of ...

AimsPermanent pacemaker (PM) implantation is temporarily contraindicated in patients (pts) with sepsis. In patients with symptomatic atrioventricular (AV) block and infection, prolonged VVI pacing is therefore usually ensured by a ventricular pacing lead (PL) connected to an external PM generator. In patients with normal sinus function and heart failure, the ...

Since its advent, implantable cardioverter defibrillator (ICD) intra-operative defibrillation testing (DFT) has been a standard practice to confirm its optimal configuration. However, due to advances in device and lead technology, which now facilitate successful device implantation, and due to growing number of ICD primary prevention patients, the need for DFT ...

We report the successful use of the implantable ventricular assist device HeartWare (HeartWare International Inc., Framingham, MA) to support the systemic circulation in two adult patients with transposition of the great arteries (TGA). One had undergone the Senning procedure as a neonate; the other had congenitally corrected TGA and dextrocardia ...

Permanently implantable hemodynamic monitors show great promise in providing personalized and cost-efficient care to heart failure patients by providing timely intracardiac pressure data under ambulatory conditions. The data may be used to titrate maintenance therapies and to monitor health status so that more intensive interventions can be planned and performed ...

Implantable cardioverter-defibrillator (ICD) therapy improves survival in patients with significant left ventricular systolic dysfunction. Although this lifesaving therapy has many benefits, inappropriate ICD shocks may increase morbidity and mortality. With rates of inappropriate therapy quoted as high as 35% at 3 years after device implantation, numerous strategies have been evaluated ...

The addition of low-passed (LP) speech or even a tone following the fundamental frequency (F0) of speech has been shown to benefit speech recognition for cochlear implant (CI) users with residual acoustic hearing. The mechanisms underlying this benefit are still unclear. In this study, eight bimodal subjects (CI users with ...

Purpose: To compare differences between restoratively projected and surgically acceptable virtual implant positions at sites identified by cylindric radiopaque markers on diagnostic templates for implant-retained mandibular overdentures using cone beam computed tomography (CBCT). Materials and Methods: A retrospective chart audit of a CBCT database identified 77 subjects who had been ...

Purpose: A key challenge in implant treatment in the esthetic zone is to provide patients with crowns and peri-implant mucosa that are in harmony with the adjacent teeth to restore both function and esthetics. The aim of the present study was to show the preliminary results of an immediate loading ...

Purpose. To investigate the predictability of simplifying mandibular overdenture treatment using one-stage surgery and early prosthetic loading of a single implant. Materials and Methods. Twenty edentulous patients with problematic existing mandibular dentures were treated. A single implant with a chemically modified surface (SLActive, Straumann AG, Basel, Switzerland) was placed into ...

Excessive occlusal wear can result in pulpal injury, occlusal disharmony, impaired function and aesthetic deformity. Loss of anterior guidance can result from severe wear of anterior teeth, which protects the posterior teeth during excursive movement. The collapse of posterior teeth also results in the loss of normal occlusal plane and ...

Background: This study was done to compare and evaluate the compressive strength, diametral tensile strength, and microleakage of glass ionomer cement and chlorhexidine-modified glass ionomer cement. The glass ionomer cements used in the study were Fuji IX for group I and chlorhexidine-modified glass ionomer cement for group II. Materials and ...

Objective: To compare the anchorage potential of mini-implants with modified Nance palatal buttons during simultaneous first and second maxillary molar distalization. Methods: Mini-implants (1.4 x 10 mm) placed to obtain indirect anchorage for maxillary molar distalization using a superelastic Ni-Ti open coil spring were compared with anchorage derived from a ...

Glutaraldehyde cross-linked porcine aortic valves, referred to as bioprosthetic heart valves (BHVs), are often used in heart valve replacements. Glutaraldehyde does not stabilize glycosaminoglycans (GAGs) and they are lost during preparation, in vivo implantation, cyclic fatigue, and storage. We report that binding of neomycin, a hyaluronidase inhibitor, to the tissues ...

A 48-year-old man was admitted after an episode of aborted sudden death with external defibrillation. An implantable cardioverter defibrillator implanted 2 years before for secondary prevention failed to sense properly an episode of ventricular fibrillation. Interrogation of the device showed large oscillatory changes of the amplitude of the local electrogram ...

OBJECTIVES: To analyze the variations in the parameters relative to active fixation electrodes at the time of implantation and over subsequent follow-up during 6 months of the acute phase of implantation. DESIGN: A descriptive, analytical, prospective, observational cohort study was made of consecutive cases over a period of 8 months ...

BACKGROUND: Transcatheter aortic valve implantation (TAVI) has been developed to minimize operative morbidity and mortality in high-risk symptomatic patients unfit for open surgery. With the proximity of the aortic valve annulus to the conduction system there is, however, an unknown risk of conduction disturbances necessitating monitoring and often cardiac pacing. ...

For many patients with end-stage heart failure, heart transplantation is the only remaining option to prolong survival and provide symptom relief. Transthoracic echo is the modality of choice in assessing a patient for potential left ventricular assist device (LVAD) insertion. There are currently no guidelines available, and assessing this specific ...

Objectives: This study assessed the feasibility and efficacy of implanting a new nitinol device for closure of perimembranous ventricular septal defects in a swine model. Background: Perimembranous ventricular septal defect occurs in 80% of patients requiring treatment for congenital heart disease. Methods: The Amplatzer perimembranous ventricular septal occluder device (pmVSO2 ...

The medical community has seen an explosive rise in the utilization of implantable mechanical circulatory support devices for late-stage cardiomyopathy. Care for these complex patients requires a basic understanding of device physiology and potential complications. This review focuses on an algorithm that incorporates a careful clinical history and examination with ...

The role of cardiac resynchronization therapy in mild heart failure has become a focus of attention with the publication of recent clinical trials. We present a review of the data supporting implantation of cardiac resynchronization devices in early stage heart failure. In addition, we present evidence that may suggest patients ...