OBJECTIVE To evaluate the osteogenic potential of avian demineralized bone matrix (DBM) in the context of implant geometry. STUDY DESIGN Experimental. ANIMALS Rock pigeons (n = 24). METHODS Tubular and chipped forms of DBM were prepared by acid demineralization of long bones from healthy allogeneic donors and implanted bilaterally into the pectoral region of 24 pigeons. After euthanasia a...

In recent years, mini and short dental implants have become increasingly popular as treatment alternatives for patients in whom the bone is unsuitable for a standard implant. As yet, no detailed scientific analysis of the mechanical and biomechanical impact of the reduced diameter and length of these implants has been published. We analysed 21 commercially available implants (13 mini, eight sho...

background: the aim of this in vitro study was to evaluate the effect of shape, diameter and length of implants on their primary stability based on resonance frequency analysis. materials and methods: replace select tapered and branemark mk iii implants were selected. each of these two selected groups was divided into nine subgroups based on the implant length (il) (short, medium and long) and ...

We present a new approach for cranial implant design which uses anatomical constrained deformation based on reference models. The methodological framework contains three steps: patient-specific generation of the reference model containing the anatomical constraints about the skull shape; determination of the spatial correspondence between the patient skull and the reference model by 3D matching...

Prosthetic replacement in the hand must address such unique challenges as preservation of the collateral ligaments, tendon balancing, and stability. Some recently developed implant arthroplasties of the metacarpophalangeal and proximal interphalangeal joints have anatomically designed articular components; others have non-cemented, press-fit, carefully contoured intramedullary stems. The ration...

OBJECTIVES/HYPOTHESIS 1) To test whether alteration of the vocal fold medial surface contour can improve phonation and 2) to demonstrate that implant material properties affect vibration even when implantation is deep to the vocal fold lamina propria. STUDY DESIGN Induced phonation of excised human larynges. METHODS Thirteen larynges were harvested within 24 hours postmortem. Phonation thre...

In this paper, we report the benefit of Computer Tomography (CT), reverse engineering (RE) and rapid prototyping (RP) in individual implant production for maxillofacial surgery. The design and fabrication processes includes: a) processing medical image data of a patient’s pathologically defective area having a symmetrical part to construct a three-dimensional (3D) digital model; b) forming an i...

Dental implant–abutment systems are used as anchors to support single or multi-unit prostheses for partially or fully edentulous patients. In vitro experiments and finite element analyses can be used to investigate their mechanical performance. Accurate information is needed on the geometry, material properties and friction coefficients of different implant-abutment components, on real loading ...

PURPOSE Micromotion at the implant-abutment level has been reported to be a major determinant of longterm implant success, as technical problems ranging from screw loosening to screw fracture may occur as a consequence of excessive micromotion. MATERIALS AND METHODS Following published standards, implant-abutment assemblies were fixed in a universal testing machine at a 30-degree angle. A cyc...

Titanium implants have been successful in both dentulous and edentulous patients. The original Brånemark titanium implants were introduced with external hex connections between implants and abutments. Successes and failures/complications with both the biology and mechanics of this connection system have been reported. In an attempt to improve the predictability and success of implant/abutment c...