A prospective randomized study was conducted to determine if a design change in the articular surface geometry introduced in the Optetrak total knee to increase prosthetic joint conformity and further reduce polyethylene stress had any impact on implant survival, particularly when the all-polyethylene version of the implant was used. Forty-seven patients undergoing bilateral simultaneous total ...

The goal of this study was to explore an innovative approach to single-tooth replacement using an individually custom-fabricated, root-analog, hybrid dental implant, in the esthetic zone, to avoid the microgap and micromovements between the implant and abutment. Moreover, the use of burs to prepare the implant recipient site is not necessary in this technique, reducing the bone removal, heating...

Background Reverse total shoulder arthroplasty is an increasingly utilized treatment option for glenohumeral arthritis with massive, irreparable rotator cuff disruption associated with loss of glenohumeral stability and function. Several reverse shoulder implant designs from different manufacturers have been introduced to the market in recent years. Fixation of the glenoid base plate has been s...

The longevity of hip prostheses is contingent on the stability of the implant within the cavity of the femur bone. The cemented fixation was mostly adopted owing to offering the immediate stability from cement-stem and cement-bone bonding interfaces after implant surgery. Yet cement damage and stress shielding of the bone were proven to adversely affect the lifelong stability of the implant, es...

PURPOSE A satisfactory clinical outcome in dental implant treatment relies on primary stability for immediate load bearing. While the geometric design of an implant contributes to mechanical stability, the nature of the implant surface itself is also critically important. Biomechanical and microcomputerized tomographic evaluation of implant osseointegration was performed to compare alternative ...

Bone remodeling and, consequently, soft tissue levels around osseointegrated implants may be influenced by many variables that are considered of prosthetic or biomechanical nature: implant-abutment connection type and geometry (external vs internal), timing of abutment connection (at uncovering vs delayed), abutment material (titanium vs gold vs ceramic), abutment shape and dimensions (convex v...

objectives : to carry out in vivo and in vitro comparative pilot study to evaluate the preciseness of a newly proposed digital dental radiography setup. this setup was based on markers placed on an external frame to eliminate the measurement errors due to incorrect geometry in relative positioning of cone, teeth and the sensor. methods : five patients with previous panoramic images were selecte...

OBJECTIVES The aim of this study is to compare two commercially available screw-type sandblasted and acid-etched (SLA) Ti implant systems from Eckermann Laboratorium S.L., with similar geometry and distinct microtopography, regarding surface properties and osteoblastic cytocompatibility. MATERIAL AND METHODS Implant I (referred as a conventional SLA system) and Implant II (a system patented a...