ISSN:1056-6163    

出版商:OVID    

年代:1992

数据来源: OVID

摘要:

Overdentures can be utilized effectively in treatment plans involving implants. Usually soft tissue support is necessary, which requires a conventional denture base. Implant-supported overdentures do not require conventional denture base extension unless necessitated by functional or esthetic considerations. With fixed-detachable hybrid dentures, flanges can often interfere with home care procedures. Spark erosion overdentures meet the requirements for esthetics, phonetics, retention, and support and also allow accessibility for proper patient oral hygiene. This article reviews the advantages and disadvantages of the spark erosion overdenture and provides guidelines for the fabrication of this type of prosthesis. (Implant Dent 1992;1:246–251)

ISSN:1056-6163    

出版商:OVID    

年代:1992

数据来源: OVID

ISSN:1056-6163    

出版商:OVID    

年代:1992

数据来源: OVID

摘要:

Hydroxyapatite coatings have shown promise due to the enhanced integration of osseous tissues to coated implant surfaces. When compared with healing around commercially pure or titanium alloy implant surfaces, hydroxyapatite-coated implants appear to be superior in sites which are compromised in either quantity or quality of bone. In spite of these encouraging findings, the long-term stability of the hydroxyapatite/bone interface has been challenged. Microbiologically, the hydroxyapatite-coated implant surface may be at an increased risk to bacterial plaque. However, after 8 years of clinical utilization, the hydroxyapatite-coated implant surface has not been shown to be predisposed to increased long-term failure. Available research as it pertains to this controversial area of implant dentistry is reviewed. (Implant Dent 1992;1:253–257)

ISSN:1056-6163    

出版商:OVID    

年代:1992

数据来源: OVID

ISSN:1056-6163    

出版商:OVID    

年代:1992

数据来源: OVID

ISSN:1056-6163    

出版商:OVID    

年代:1992

数据来源: OVID

摘要:

This in vitro pilot project compared the effect of two air-abrasive prophylaxis systems on the surface of machined titanium. Single Brånemark titanium abutment cylinders were exposed to the Prophy-Jet and Microprophy systems for 90 seconds each. Both of the test cylinders were compared with an untreated control cylinder by scanning electron microscopy. Machining marks were completely removed by the Prophy-Jet and only partially removed by the Microprophy. Both of the resultant surfaces appeared to be smoother and thus may be more resistant to plaque formation. A rationale for the removal of machining marks is presented, although the reason for the difference in removal by the two systems is unclear. The prophylaxis cleaning powders were also examined by scanning electron microscopy and exhibited similar particle dimensions and morphology. A noncrystalline deposit was observed on the surface of the abutment cylinder exposed to the Microprophy. Energy dispersive spectroscopy analysis revealed that the deposit consisted almost entirely of sodium. Further investigation of the deposit is needed. (Implant Dent 1992;1:259–265)

ISSN:1056-6163    

出版商:OVID    

年代:1992

数据来源: OVID

ISSN:1056-6163    

出版商:OVID    

年代:1992

数据来源: OVID

摘要:

An extensive overview of dental implant abutments for coronally hexed implants is presented. Abutment technology, indications, and contraindications for abutments are discussed. Various implant designs from 16 commercial manufacturers with over 64 abutment variations and transfer concepts are illustrated. (Implant Dent 1992;1:273–282)

ISSN:1056-6163    

出版商:OVID    

年代:1992

数据来源: OVID

摘要:

The Interprobe is designed to provide measurements of pocket depths and attachment loss. Investigators involved in a clinical study on dental implants being conducted by the Dental Implant Clinical Research Group participated in an in vitro evaluation of the variability of repeated measurements made with the Interprobe. Measurements were made on holes drilled to predetermined depths in metal blocks. Three readings by investigators for each of nine test holes were in agreement 75.2 percent of the time. At least two of three readings were in agreement in 98.1 percent of the attempts. Either two of three or three of three readings were within 0.5 mm of the actual depth of the holes over 99 percent of the time. No correlation was noted for accuracy of measurements with hole depth or present clinical duties of the investigators. Although slight initial improvement in measurement accuracy was observed, it was not statistically significant in time over the three measurement sequence. (Implant Dent 1992;1:284–287)

ISSN:1056-6163    

出版商:OVID    

年代:1992

数据来源: OVID