Jeffrey E Rubenstein

University of Washington | UW · Department of Restorative Dentistry (Prosthodontics)

Purpose To measure the wear at the implant interface between the Grade 4 titanium (Ti) of the implant and frameworks fabricated using two additively manufactured alloys (Ti alloy and cobalt–chromium [Co–Cr]) pre‐ and post‐artificial aging. Material and methods Three‐unit frameworks supported by two implants were additively manufactured (Atlantis;...

Purpose: To assess the implant-abutment discrepancy of complete-arch frameworks manufactured using milling and additive electron beam melting (EBM) technologies, before and after acrylic resin veneering application. Materials and methods: A definitive implant cast with six implant replicas was digitized using a laboratory scanner. A software pro...

Osteopetrosis (marble bone disease) is a family of rare genetic disorders characterized by impaired osteoclast function leading to hyperdense, hypovascular, brittle bone. Typical imaging shows increased bone mass and thickened cortical and trabecular bone. Bones are more prone to fracture and osteomyelitis may develop. When considering dental impla...

Statement of problem Photogrammetry technology has been used for the digitalization of multiple dental implants, but its trueness and precision remain uncertain. Purpose The purpose of this in vitro investigation was to compare the accuracy (trueness and precision) of multisite implant recordings between the conventional method and a photogrammetr...

Clinical Presentation A patient presented with malaligned and rotated, missing, unerupted, and partially erupted/maldeveloped teeth seeking care to improve her masticatory function. She had impaired hearing and vision, but no neurologic symptoms. A panoramic radiograph, a lateral cephalometric radiograph, and a medical CT scan were reviewed. The ra...

Statement of problem Conventional implant impressions by using elastomeric impression material have been reported as a more reliable technique for a complete-arch implant record compared with intraoral scanner procedures. Photogrammetry technology may provide a reliable alternative to digital scanning or a conventional impression; however, its accu...

Statement of problem Selective laser melting additive manufacturing (AM) technologies can be used to fabricate complete-arch cobalt-chromium (Co-Cr) implant-supported prostheses. However, the discrepancy at the implant-prosthesis interface with these fabrication techniques and after ceramic veneering remains unclear. Purpose The purpose of the pre...

Statement of problem: Conventional impression techniques to obtain a definitive cast for a complete-arch implant-supported prosthesis are technique-sensitive and time-consuming. Direct optical recording with a camera could offer an alternative to conventional impression making. Purpose: The purpose of this in vitro study was to test a novel intr...

Conventional impression techniques for recording the location and orientation of implant-supported, complete-arch prostheses are time consuming and prone to error. The direct optical recording of the location and orientation of implants, without the need for intermediate transfer steps, could reduce or eliminate those disadvantages. The objective o...

Documentation of long-term changes in food intake is lacking for those treated with a maxillary complete denture opposed by a mandibular, screw-retained, implant-supported fixed prosthesis. The purpose of this study was to evaluate the selection patterns of dietary foods over 5 years for edentulous participants treated in a multicenter prospective...

An overview of oral and extra-oral (facial) maxillofacial prosthodontic treatment options will be reviewed. Historical, current, and future perspectives will be presented in an attempt to provide a comprehensive understanding as to the considerations and thought processes that guide the clinician providing these rehabilitative services. In so doing...

Although various zirconia abutments have been introduced, insufficient data exist regarding the maximum load capacity of internal tri-channel connection zirconia implant abutments with various implant-abutment interfaces. The purpose of this in vitro study was to compare the maximum load capacity of 3 different types of internal tri-channel connect...

When making a definitive impression for an arch containing multiple implants, there are many reported techniques for splinting impression copings. This article introduces a splint technique that uses the shim method, which has been demonstrated to reduce laboratory and patient chair time, the number of impression copings and laboratory analogs need...

Loss of facial anatomy resulting from disfigurement secondary to trauma, surgical excision to eradicate benign or malignant lesion, or anatomical malformation resulting from congenital anomalies represents a loss of one’s three-dimensional signature/identity. The psychological implications stemming from being different from the norm have significan...

Attachments for mandibular overdentures may not allow for adequate freedom of rotation. The purpose of this study was to subject 3 commonly used stud types of resilient attachments to rotation and to measure and compare the degree of rotation that occurs before the attachments bind. Three stud attachments (ERA, Locator Extended Range, O-Ring System...

This clinical report describes the treatment of an edentulous patient with previous radiation therapy to the base of the tongue. A computer-aided manufactured titanium framework was used to fabricate the implant-supported fixed complete denture and meet the functional and psychosocial needs of the patient.

To evaluate the shear bond strengths of highly cross-linked denture teeth bonded to heat-polymerized poly(methyl methacrylate) (PMMA) or a light-polymerized urethane dimethacrylate (UDMA) denture base resin with or without a diatoric and with or without an acrylate bonding agent. The denture base resins tested were Lucitone 199 (heat-polymerized PM...

Three-dimensional imaging, particularly cone-beam computed tomography (CBCT), has made significant contributions to the planning and placement of implants to replace missing teeth. The accuracy of CBCT data can be used to fabricate a surgical guide that transfers the implant planning information to the surgical site to facilitate implant placement....

The purpose of this retrospective study was to review and assess the outcomes of subjects treated with dental implants at the University of Washington Graduate Prosthodontic Program from 1988 to 2000. A retrospective review and an outcomes assessment were conducted of patients treated with osseointegrated implants between 1988 and 2000 at the Unive...

Use of a segmental indexing/soldering approach for assembly of complete arch implant frameworks has been advocated by some clinicians to achieve a passively fitting framework. To the authors' knowledge, a mathematical assessment using a 3-dimensional (3-D) distortion analysis has not been performed comparing segmental framework assembly to reassemb...

Since their introduction, craniofacial implants have been used in prosthetic rehabilitation of facial defects. The literature, however, indicates marked variability in outcomes using implants for the retention of orbital prostheses. A multicenter report updating the experience in the United States with the use of craniofacial implants for prostheti...

For patients who require complex fixed prosthodontic oral rehabilitation, recording an accurate centric relation is often a difficult procedure. A minimal number of abutment teeth or implants may not offer adequate support for the occlusal registration material. In the described technique, Triad tray material is used as an occlusal registration sup...

Three different procedures that involve the use of Triad gel are described. This light-polymerized resin material is versatile and easy to use in the dental clinic and laboratory. The procedures described include the transfer of ridge topography for ovate pontic sites, implant lab analog fixation, and solid/soft tissue cast fabrication.

With the introduction of new techniques for the fabrication of frameworks for implant-supported prostheses comes the need to understand how the components used compare to those used for conventional cast frameworks. The relationship of measured machining tolerances between conventional implant components and those components used for stereo laser-w...

A range of treatment options has been presented regarding the use of dental implants to rehabilitate patients who otherwise have compromised function using conventional tissue-borne prostheses. This patient population offers significant challenges to both the surgeon and the prosthodontist. Generally speaking, IODs retained on two or more endosteal...

The application of endosseous dental implants for the retention and stabilization of extraoral prostheses and hearing aids has been shown to be effective functionally and aesthetically. Implants have reduced the need for adhesive use, simplifying cleaning procedures and thus extending the life of the prosthesis. Implant-retained prostheses have pro...

Machining tolerance, an intrinsic characteristic that exists between machined implant components, identifies the amount of horizontal shift possible between paired components. Machining tolerances between implant components (abutment, gold, cylinder, impression coping, and brass abutment replicas) were measured with a coordinate measuring machine....

A new method for fabrication of crowns and fixed partial dentures (Procera system) that involves electric discharge machining and copy milling has been developed. The metal used is unalloyed titanium, which can be processed as a single coping or multiple units joined to a pontic by laser welding. The single-unit coping or the fixed partial denture...

This investigation was initiated to develop a method to provide patients with a fixed provisional prosthesis placed at the time of implant placement. Sixty-three standard 3.75-mm Nobel Biocare implants of varying lengths were placed into mandibular sites in 10 patients and followed for up to 10 years. Twenty-eight implants were immediately loaded a...

Four centers in the United States and Sweden have been working for 2 years to develop systems and methods for measuring fit at the prosthodontic interface. Two systems are based on stylus contact techniques, one system uses a laser as its reader source, and one system is photogrammetric. All the systems are capable of providing data as three-dimens...

A new technology for implant framework fabrication (Procera) has been introduced to North America after initial clinical trials in Sweden. This technique is unique because it eliminates the conventional approach to framework fabrication with the lost wax casting technique. Clinical and laboratory procedures associated with the Procera technique are...

A survey was conducted of one Swedish, three Canadian, and 24 United States centers that provide implant-supported facial prosthetic treatment. All centers responded to the survey. A total of 357 patients began treatment. Of those, 338 completed treatment: 165 in Sweden, 131 in the United States, and 42 in Canada. The incidence of facial sites trea...

The three-dimensional distortions of implant frameworks of two designs, reflecting the early "Toronto" U-shaped design and a current L-shaped design, were measured. A conventional commercial laboratory one-piece casting method, using a silver-palladium alloy, was used. Distortion was defined by five displacement variables for the centroids of each...

An in vitro study was conducted to determine the accuracy of fit of the acrylic resin pattern for the implant-supported prosthesis to the implant abutments. A master model containing five Nobelpharma titanium implants was fabricated using Ivocap acrylic resin. Using this model, five standardized acrylic resin patterns were fabricated from the three...

Restoring patients with implant-supported fixed-detachable bridges according to the protocol established by Brånemark necessitates a period of several months when complete dentures must be worn to allow for a stress-free healing period of the implants. For many patients, especially when they still have some natural teeth remaining, this is unaccept...

Many different approaches have been advocated in the literature for the fabrication of orbital prostheses. An alternate technique using a two-piece system and magnetic retention between the two has been described. This technique has been successful in the prosthetic rehabilitation of patients treated for orbital exenteration.