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Results for “WELDING”

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At least 649 records · Page 36Linked to original sources
PubMed2007

An experimental in vivo analysis of the resorption to ultrasound activated pins (Sonic weld) and standard biodegradable screws (ResorbX) in sheep.

We compared the healing and reaction in the mandibles of 11 sheep of a conventional bioresorbable screw osteosynthesis with the newly developed ultrasound-activated pin osteosynthesis. The thermal stress caused by insertion of the ultrasound-aided pins leads to no cellular reaction around the pin. There is neither clinical nor histological evidence of any initial inflammation that could have been induced by the insertion. Adequate attachment of fibrous tissue to the pin head and the absence of any inflammation are important preconditions for the introduction of this new method of osteosynthesis into clinical practice. Further advantageous characteristics are easy intraoperative handling and a reduction in operating time, because cutting the thread is not required. There must be sufficient interlinkage of the polymer and the trabecular structures to ensure stability.

Absorbable Implants↗
PubMed1995

Stereo laser-welded titanium implant frameworks: clinical and laboratory procedures with a summary of 1-year clinical trials.

A new technology for implant framework fabrication (Procera) has been introduced to North America after initial clinical trials in Sweden. This technique is unique because it eliminates the conventional approach to framework fabrication with the lost wax casting technique. Clinical and laboratory procedures associated with the Procera technique are described in this article, as are the most recent developments in this rapidly emerging technology. A report of 1-year results of the first 10 patients treated with the Procera technique at the University of Washington is described. Treatment outcome has been favorable, with no clinical evidence of prosthodonic or soft-tissue complications noted. All 50 of the implants placed in the 10 patients remain integrated after 1 year of service. The Procera technology offers an alternative to current conventional framework fabrication techniques. Continued follow-up of this patient series is pursued to explore the treatment outcome for a longer interval of time.

Aged↗
PubMed2000

Welding and non-melanoma skin cancer.

This paper reports on five cases of nonmelanoma skin cancer (NMSC) occurring in welders, an occupation in which there is potential for intense exposure to nonsolar ultraviolet irradiation. The status of ultraviolet light as the major aetiological factor in NMSC is well established, and in the great majority of cases solar irradiation is the source. The possible role of nonsolar sources of ultraviolet irradiation should not be overlooked.

Adult↗