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Biomedical subjects

P P Binon

Publications and source records attributed to P P Binon.

At least 19 recordsLinked to original sources
PubMed1998

Evaluation of the effectiveness of a technique to prevent screw loosening.

STATEMENT OF PROBLEM: Abutment screw loosening of single and multiple fixed partial dentures attached to external hexagonal implants is commonly encountered. PURPOSE: A technique that has been reported to prevent abutment screw loosening was tested with cyclic loading to determine its effectiveness. MATERIAL AND METHODS: A sample using identical components and test protocol, with the abutment screw tightened to 20 Ncm, was used as control. RESULTS: On the basis of the data obtained, the recommended technique does not increase resistance to screw loosening. The control sample sustained a mean number of cycles to screw loosening of more than twice that of the technique evaluated.

Calibration↗
PubMed1996

Evaluation of three slip fit hexagonal implants.

Three external hexagonal implant systems were evaluated for machining tolerances and component fit. Mean implant hexagonal flat to flat size dimension varied from 2.685 to 2.700 mm, and a close correlation among corresponding analog hexagonal flat to flat dimensions for each system was noted. Rotational misfit for implant abutment matings varied from 1.6 to 5.3 degrees. Torsional strength for four different matings ranged from 122.7 to 175.8 N-cm. The data presented suggest a trend by some implant manufacturers toward improved tolerances, accuracy, fidelity, and consistency of implant components.

Dental Abutments↗
PubMed1993

Implant-supported fixed prosthesis treatment of a patient with Sjögren's syndrome: a clinical report.

Many completely and partially edentulous patients experience advanced xerostomia and have considerable difficulty wearing tissue-supported prostheses. A conservative, maximum bone preservation approach to immediate implant placement is presented. The surgical and prosthetic considerations for treating a patient with Sjögren's syndrome are reviewed and discussed.

Dental Care for Persons with Disabilities↗
PubMed1992

Surface analysis of an original Brånemark implant and three related clones.

Selected surface characteristics of screw-type titanium dental implants from four different manufacturers were evaluated. Considerable differences in surface and near-surface contaminants were demonstrated. The fixture treated with radiofrequency glow discharge (plasma) demonstrated the thinnest titanium oxide layer and the cleanest surface.

Dental Implants↗
PubMed1980

Self-threading pin penetration into dentin.

A laboratory study has shown that the first-half of self-shearing 2-in-1 self-threading pins, sizes 0.031 inch and 0.024 inch, fail to reach full channel depth when placed with either a hand wrench or an Auto Klutch handpiece. The average discrepancy of penetration is about 0.75 mm. This discrepancy in seating results in a significant excess pin length extending into the tooth preparation, which compromises the strength characteristics of the amalgam restoration.

Dental Amalgam↗
PubMed1976

Three-year clinical comparison of three amalgam alloy types emphasizing an appraisal of the evaluation methods used.

Five different evaluation techniques were used to measure the marginal breakdown of three-year-old amalgam restorations. The most useful method appeared to be one in which photographs of all restorations were ranked in descending order starting with the restoration that had the least marginal breakdown and ending with the restoration that had the greatest deterioration. Three different alloys were evaluated and the results confirm those of previous studies; the alloy having the lowest creep was superior whereas restorations placed with the alloy having the highest creep displayed the greatest marginal breakdown.

Dental Amalgam↗
PubMedDate not supplied

Evaluation of machining accuracy and consistency of selected implants, standard abutments, and laboratory analogs.

Thirteen implants having external hexagonal extensions were evaluated for machining accuracy and consistency. A composite score was derived to evaluate overall manufacturing accuracy and consistency of the implants evaluated in this study. A technique to determine the rotational freedom between implant and abutment is described, and the coronal hexagonal matings of selected implants and abutments is evaluated and reported. Crossover use and combinations of products from different manufacturers was also evaluated for rotational freedom. Two nonexternal hexagonal extension implant configurations were measured for rotational movement as contrasting and comparative values.

Analysis of Variance↗
PubMedDate not supplied

The effect of implant/abutment hexagonal misfit on screw joint stability.

A series of 10 incrementally larger, machined ASTM Grade 23 titanium non-segmented (UCLA type) abutments was loaded off axis with 133 N and cycled at 1150 vertical strokes per minute and 28 counterclockwise rotations per minute to determine screw joint stability. Abutment internal hexagonals ranged from 0.1065 to 0.1110 inches. External hexagonal mean flat-to-flat width was 2.684 mm. Rotational misfit between international and external hexagonals ranged from 1.94 degrees for the smallest abutment to 14.87 degrees for the largest. Screw joint failure ranged from 134,000 to 9.3 million cycles. The tightest matrix/patrix hexagonal screw joint failed at a mean of 6.7 million cycles. This study indicated that there was a direct correlation between hexagonal misfit and screw joint loosening. A rotational misfit of under 2 degrees provided the most stable and predictable screw joint.

Cluster Analysis↗
PubMedDate not supplied

The spline implant: design, engineering, and evaluation.

The design and engineering characteristics of the Spline dental implant were investigated. Compressive strength, rotational movement, resistance to cyclic loading and torsional strength were evaluated. The results of the mechanical test indicated that this implant/abutment complex is mechanically stable, has minimal rotational movement, improved resistance to screw loosening, and good interface fidelity. The data for the new design are compared with published data for other implant/abutment connections.

Compressive Strength↗