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H Knode

Publications and source records attributed to H Knode.

10 recordsLinked to original sources
PubMed1998

In-Ceram fixed partial dentures: three-year clinical trial results.

In-Ceram is a sintered, high-alumina-content, glass-infiltrated ceramic core material reported to have sufficient strength for all-ceramic fixed partial dentures. While Vita/Vident recommends that In-Ceram should be used only for anterior FPDs, the purpose of this study was to push the sintered alumina material to its limits by testing posterior FPDs with premolar and molar pontics. This prospective clinical trial tested the longevity of 61 three-unit In-Ceram alumina FPDs. The failed specimens were analyzed to determine factors contributing to failure. The abutment teeth were prepared for full crown retainers with shoulder margins and 1.3 mm of axial reduction. All FPDs were cemented with an encapsulated glass ionomer. None of the patients reported postcementation sensitivity. During the three-year period, seven FPDs fractured through the connector area. By location of the pontic, failure rates were 0 percent for anteriors, 11 percent for premolars and 24 percent for molars. Based on the results of this clinical study at the three-year point, In-Ceram alumina can be reliably utilized for anterior FPDs as indicated by a 100 percent success rate. The findings do not support the use of In-Ceram alumina for posterior FPDs as was advised by the porcelain manufacturer. Glass ionomer cement can be predictably used to cement In-Ceram FPDs with few clinical side effects. Because of a technological malfunction, this article could not be presented with the others on ceramic restorations that appeared in the February issue.

Aluminum Oxide↗
PubMed1995

Rehabilitation with implant-supported suprastructures at the time of the abutment surgery: a case report.

This case report describes the clinical and technical placement procedures for single tooth implant-supported restorations at the time of second-stage surgery. After an implant is placed, its position in relationship to the adjoining teeth can be precisely recorded, using an impression coping and a prefabricated individual resin tray. The tray and the impression coping are joined with self-curing resin and then remounted on the master cast to place an implant analog. The modified master cast is used to fabricate the definitive restoration. Following second-stage surgery, an all-ceramic single crown is placed. The periimplant tissues are molded into position by the definitive restoration, and the healing of the periimplant tissues is controlled entirely by the anatomy of the prefabricated definitive restoration. The learning objective of this article is to familiarize clinicians with placement of implant-supported restorations at the time of second-stage surgery. The method is simple and efficient, and it can also be used with one-phase implant system restorations.

Adult↗
PubMed1992

Restoration of maxillary residual ridge atrophy using Le Fort I osteotomy with simultaneous endosseous implant placement: technical report.

When residual ridge atrophy of the edentulous mandible and maxilla is accompanied by a skeletal Class III jaw relationship, surgical correction is necessary for optimal functional, phonetic, and esthetic results whenever implant-supported prostheses are to be placed. A method is described in which a single procedure combines the endosseous placement of nonsubmerged titanium implants in appropriate prosthetically predetermined locations with defined advancement of the maxilla. Preoperative diagnostic examinations, cast simulation, and transfer of the latter to the site of surgery are of the utmost importance.

Alveolar Bone Loss↗
PubMed1991

[Strength of the In-Ceram system under mechanical loads and thermocycling in artificial saliva].

The mechanical strength of the new oxide ceramic system In-Ceram introduced by Vita (Bad Säckingen, Germany) was investigated by an in-vitro study for its mechanical strength and suitabilities for use as posterior three-unit bridges. The transverse strength value measured by a three-point bending test (DIN 13,927) is 320 MPa and the maximum vertical load on three-unit bridges until brittle failure occurs is in the range of 1000 to 1350 N. This is up to four times higher than corresponding values of other ceramics, e.g. Dicor (Dentsply) or Optec (Jeneric). The dental bridges were luted to metallic pontics, and a layer of silicon rubber simulating the periodontal membrane, separated the pontic from a resin base in the testing machine. Life value tests were performed before and after 10 days of thermocycling at temperatures alternating between 5 and 55 degrees C in artificial saliva. Although the pontics had a much higher mobility than normal teeth, the fatigue limit was found to be above 600 N which is much higher than the average biting forces acting on the first and second molars.

Aluminum Oxide↗
PubMed1991

The all-porcelain, resin-bonded bridge.

This case report describes the clinical and laboratory procedures for the fabrication and insertion of In-Ceram all-porcelain, resin-bonded bridges. All-porcelain crowns and fixed partial dentures have better biocompatibility and better esthetic results than do ceramometal restorations. In-Ceram has been shown to have better physical properties than other ceramic or glass materials. However, long-term clinical studies of the material are not yet available.

Aluminum Oxide↗
PubMedDate not supplied

Fabrication of all-ceramic In-Ceram implant-supported bridges: a case report.

Ceramic restorative materials offer certain advantages over metal-acrylic and metal-ceramic restorations, including low plaque accumulation, corrosion resistance, nonallergenic properties, and excellent aesthetic results. A new ceramic material with a high aluminum content has been recently developed. It addresses the problem of some other materials which absorbed saliva in the oral environment and caused microcracks, rendering them unsuitable for multi-unit suprastructures. The learning objective of this case report is to describe the clinical and laboratory procedures for fabrication of the all-ceramic implant-supported suprastructures for an edentulous patient after orthognathic surgery and the placement of associated endosseous oral implants.

Adult↗