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At least 487 records · Page 27Linked to original sources
PubMed1990

[The implant/tissue interface in a clinical perspective].

For a proper insight in the implant/tissue interface of permucosal oral implants it is good to refer to the tooth/periodontium interface. Although there are evident differences such as the lack of a periodontal ligament with its possibilities for eruption and migration and elaborate neural endings, it seems that classical periodontal parameters are the yardstick to discriminate failure from success of oral implants. Long cone radiographs and mobility assessment seem the only available clinical tools to detect a scar tissue interposition. On the other hand, their discrimination power is insufficient to prove close bone apposition. Further studies are needed to interpret the observations that around failing implants the subgingival microflora resembles that of active adult periodontitis. Periodontologists can learn a lot from the implant/periodontium interface to get a better understanding of the tooth/periodontium complex.

Dental Implants↗
PubMed1996

Implant bar design, the next generation.

The rationale for implant-supported overdenture therapy is discussed with emphasis on diagnosis (why) and consequential therapy (how). After the conventionally available bar designs are discussed, the newer CEKA bar is discussed. This design of the next generation enables individualization of the essential functions of an implant bar, namely occlusal support, lateral stability and retention.

Dental Implantation, Endosseous↗
PubMed1994

Problems with tracheoesophageal fistula voice restoration in totally laryngectomized patients. A review of 95 cases.

OBJECTIVES: Tracheoesophageal fistula (TEF) construction, performed during or after total laryngectomy, is used for voice and speech restoration but has been associated with mild to severe complications. Our goal was to study the successes and complications in the application of this technique to restore voice function after laryngectomy in 95 consecutive patients. RESEARCH DESIGN: Retrospective cohort study with a mean follow-up time of 3.5 years. SETTING: Five medical facilities in northern California: the Veterans Affairs Medical Centers in San Francisco and Martinez, the Kaiser Permanente Medical Center in Oakland, and private practice offices in San Francisco and Pinole. PATIENTS: Ninety-five patients (90 men and five women) who had undergone total laryngectomy with subsequent or primary TEF construction. Patients' ages ranged from 35 to 80 years. INTERVENTIONS: Three- or two-layer closure was used, depending on whether TEF construction was done as a secondary or a primary procedure. Most patients underwent radiation therapy, and most used surface or intraoral electrolarynx devices before TEF construction. Insufflation tests were performed by clinicians, or self-insufflation tests were performed by the patient. Patients' voices were recorded and analyzed. In many cases, respiratory and pulmonary function studies were performed before and after total laryngectomy or TEF. Blom-Singer and Groningen voice prostheses were used. MAIN OUTCOME MEASURES: Voice restoration was considered successful when the patient was able to communicate effectively via the TEF. RESULTS: Approximately 92% of patients who underwent TEF construction and had voice prostheses placed were considered to be successfully rehabilitated. Complications ranged from mild to severe and included problems with predictive values obtained during insufflation, fistula retention, TEF angulation shifts, fungal colonization of the prosthesis, valve retention problems, difficulty with digital occlusion, pressure necrosis, postradiation necrosis, dysphagia, phonatory gagging, emesis, gastric distention, pouching, stenosis, infection, hypertrophy, shunt insufficiency, persistent spasm, myotomy, inadvertent fistula closure, and aspiration of the prosthesis. CONCLUSIONS: Acoustic measures indicate that speech produced with the TEF compares better with normal laryngeal speech than does esophageal or electronic speech. Thus, TEF should remain the preferred procedure to rehabilitate patients undergoing total laryngectomy.

Adult↗
PubMed1992

Naturally occurring undercuts in the retention of an interim oculofacial prosthesis.

The use of adhesives in retaining maxillofacial prostheses has been advocated and applied for many years. Implant placement has reduced the need for adhesives in some patients but is impractical when ablative surgery is followed by radiation treatment. A technique is described that permits the rapid fabrication of an oculofacial prosthesis that uses naturally occurring orbital undercuts for retention, rather than adhesives that may further irritate radiated tissues.

Eye, Artificial↗
PubMed1984

[First contact between blood and the arterial prosthesis. Study of the retention of the blood elements].

In order to characterize the nature of the interaction between arterial prostheses and their initial contact with blood, we propose the use of an in vitro test using labelled platelets and fibrinogen to measure the amount of the thrombotic matrix that is entrapped by the wall of the graft. The results have been confirmed by scanning electron microscopy. Polyester prostheses, whose healing process depends on the reorganisation of the thrombotic matrix, retains considerably more blood cells than the polytetrafluoroethylene microporous prostheses or the treated biological devices, whose fate, following implantation, maintains almost complete passivity.

Biocompatible Materials↗
PubMed1979

Accessory retention for a facial prosthesis.

A possible means of retaining a nasal prosthesis by utilizing newly designed eyeglass frames has been proposed. In many situations, this procedure can enhance the successful rehabilitation of a patient by the maxillofacial prosthodontist.

Eyeglasses↗
PubMed1992

Extraoral retention of an obturator prosthesis.

In this study, a technique is described by which large obturators can be retained with an acrylic resin head plate. The technique entails attaching the prosthesis to an acrylic resin plate with a 2-mm-diameter wire and then attaching the plate to the patient's forehead with skin tape.

Aged↗
PubMed1995

Comparison of "look-alike" implant prosthetic retaining screws.

PURPOSE: The maximum preload torque of implant prosthetic retaining screws from four manufacturers and of two alloy types was measured to determine one index of interchangeability of intersystem components. MATERIALS AND METHODS: Implant prosthetic retaining screws from four manufacturers (3i Implant Innovations Inc, West Palm Beach, FL; Impla-Med Inc, Sunrise, FL; Nobelpharma USA Inc, Chicago, IL; and Implant Support Systems Inc, Irvine, CA) and of two metal types (gold and titanium) were investigated using an in vitro simulation model. Five screws of each type were tightened down against a gold cylinder using a Tohnichi BTG-6 torque gauge (Tohnichi American Corporation, Northbrook, IL) until fracture occurred. RESULTS: The 3i Implant Innovations gold and the Nobelpharma gold were not significantly different. The 3i Implant Innovations titanium and the Impla-Med gold were able to withstand less preload torque than the 3i Implant Innovations gold and the Nobelpharma gold. The Implant Support Systems titanium was able to withstand significantly more preload torque than all of the other screws. CONCLUSIONS: Interchanging implant prosthetic retaining screws could introduce new and unknown variables that may affect the long-term survival of implant fixtures and/or the implant prostheses.

Dental Implantation, Endosseous↗
PubMedDate not supplied

Torque required to loosen single-tooth implant abutment screws before and after simulated function.

The amount of torque required to loosen screws from three different antirotational screw-retained abutment/implant combinations was compared (with and without adhesive sealant applied) after 6 kg of force was applied during simulated intraoral movements. Movements were generated over two simulated time periods, representing 1 and 6 months. There was no significant decrease (alpha < .05) in the torque required to loosen the screws after either time period when using Calcitek Omnilock or Stryker Minimatic. The Core-Vent Bio-Vent specimens, however, exhibited a significant decrease (alpha < .05) in the amount of torque required to loosen the screws at the 1-month test period only. The addition of adhesive sealant significantly increased (alpha < .05) the amount of torque necessary to loosen the screws only in the Core-Vent specimens.

Analysis of Variance↗
PubMed1997

Overdenture retention and stabilization with ball-and-socket attachments: principles and technique.

Implant attachments of various designs are used to retain, stabilize and sometimes support overdentures. Tissue supported overdentures stabilized and retained by two to four implants are often the restorations of choice due to patient preference, limitations in finances, insufficient available bone to accommodate a greater number of implants, or needed improvements in esthetics, phonetics and oral hygiene. Female retentive sockets in the overdenture base that snap onto male ball abutments offer such advantages as reduction in hydraulic resistance to coupling, lower functional stress on the implants, retention that can be adjusted downward, easy component replacement and only relatively parallel abutments.

Dental Abutments↗
PubMedDate not supplied

Endosseous implants for total support and retention of a complete mandibular removable prosthesis.

This is a clinical report illustrating and discussing the use of endosseous root-form implants, both anterior and posterior to the mental foramen, in support of three separate Hader bars which in turn provide total occlusal support, resistance, and retention for a conventionally fabricated full mandibular overdenture. Principles of design, advantages, and disadvantages are listed.

Alveolar Bone Loss↗