ISSN:1056-6163    

出版商:OVID    

年代:1996

数据来源: OVID

摘要:

The osseointegration of endosseous dental implants is well documented. Implants have proven to be a viable treatment option for the replacement of missing teeth. The surgical phase of implant dentistry for most implant systems involves two stages—the placement of the implant and its subsequent uncovering. The IMZ (Interpore International) implant system is classically a two-stage system. No significant differences were demonstrated in osseointegration and soft tissue healing for IMZ implants placed in one-stage and two-stage procedures in this pilot study.

ISSN:1056-6163    

出版商:OVID    

年代:1996

数据来源: OVID

摘要:

Implant prosthetic retaining screws have been reported to serve as built-in safety factors to protect against overload in the implant's “vertical stack,” although loosening and fracture of retaining screws are often considered complications. Manufacturers have responded by introducing interchangeable prosthetic retaining screws, which can give the clinician the impression that interchanging screws will not have an adverse effect on the remainder of the implant complex and for the integration of the implant itself. The objective of this investigation was to measure the ultimate tensile strength of four retaining screws from three manufacturers and two alloy types (gold and titanium) using the Nobelpharma gold prosthetic retaining screw as a standard for the comparisons. Five screws of each type were loaded in tension in an Instron Universal Testing Machine until fracture occurred. A Tukey-Kramer Test (significance level =.05) analysis of the data showed that all of the interchangeable prosthetic retaining screws were significantly different from the control screws in respect to ultimate tensile strength. The data suggest that interchanging prosthetic retaining screws will influence their built-in safety feature.

ISSN:1056-6163    

出版商:OVID    

年代:1996

数据来源: OVID

摘要:

The progressive loading of implants was first suggested by Misch in 1980. A major indicator of successful osseointegration is lack of implant mobility. In a pilot study, 26 implants were placed in eight patients. Fifteen of the implants were progressively loaded before placement of the final restorations. The remaining 11 implants were allowed to heal with healing abutments only and were not loaded until placement of the final restorations. Three measurements were taken for each of the implants at the time of uncovering and at the final restoration appointment using the Periotest. The mean change in Periotest values was −0.27 for the non-loaded group as compared with −1.51 for the progressively loaded group. There was a significantly larger increase (P<0.001) in implant rigidity for the progressively loaded group. Progressive loading appears to enhance implant rigidity. The Periotest has the potential of being a valuable instrument for the determination of osseointegration.

ISSN:1056-6163    

出版商:OVID    

年代:1996

数据来源: OVID

摘要:

A technique is described for repositioning the clip attachments of implant over-dentures during repair or relining procedures using a direct method. During maintenance procedures, clip attachments must be repositioned correctly to prevent torquing of the bar and abutments and precautions taken to avoid locking the prosthesis to the undercut areas of the bar. This technique ensures proper positioning of the attachments and decreases the amount of polymerization shrinkage.

ISSN:1056-6163    

出版商:OVID    

年代:1996

数据来源: OVID

摘要:

The forces distributed on six Nobelpharma implants were analyzed by strain gauges fixed to various implant combinations that were placed in a replica of a human edentulous mandible and connected to a cast gold alloy superstructure. The mandible was supported on its lower border and the superstructure loaded in different locations. Although force distribution was found to be asymmetrical, statistical analyses revealed no significant differences. Loads applied to one side of the superstructure were largely carried by the implants on that side, demonstrating torquing of the casting in the midline. Loads applied to the cantilever resulted in large extension forces in implants on the opposite side of the fulcrum. The magnitudes of the loads distributed on the screws varied as a result of the combinations, inter-implant spaces, and implant locations.

ISSN:1056-6163    

出版商:OVID    

年代:1996

数据来源: OVID

ISSN:1056-6163    

出版商:OVID    

年代:1996

数据来源: OVID

ISSN:1056-6163    

出版商:OVID    

年代:1996

数据来源: OVID

ISSN:1056-6163    

出版商:OVID    

年代:1996

数据来源: OVID

ISSN:1056-6163    

出版商:OVID    

年代:1996

数据来源: OVID