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Biomedical subjects

E Dielert

Publications and source records attributed to E Dielert.

At least 73 records · Page 4Linked to original sources
PubMed1979

[Material found on the cleaned diamond turbine drilling heads after injury cases].

Grinding of the hard tissues of the teeth with diamond points and airotor led to bullet-like flying off of part of the instrument. The causes were investigated: Unsatisfactory fixation in the turbine head, deficient material in the rotating instrument, unnecessary notches in the shaft resulting in reduction of diameter, and finally the so far uncorrected radial vibration of the rotating instrument. All of these causes may result in plastic deformation or breakage of the points.

Dental High-Speed Equipment↗
PubMed1978

[Mechanic-technological and metallographical studies on soldering of dental alloys].

It can be proved that the reliability of soldering is in practice not very high, as properties of solidity and the quality of compounds very greatly. This is unavoidable in spite of the most careful execution of the welding and observation of the corresponding soldering directions. Low sigmaB-values are attributable to: 1. the insufficient filling of the soldering space (ca. 80%); 2. many lacunae in the solder commissures, which partly communicate with one another; 3. small diffusion zones and poor wettability in case of the pairing of the materials Co-Cr-Mo/Au-solder.

Chromium↗
PubMed1978

[Consequences of gunshot injuries of the face (author's transl)].

During a 5 year period 59 patients with gunshot wounds were treated in the Department of Maxillo-facial Surgery at Munich University. Two patients, who developed local problems secondary to latent infection due to missiles retained for 31 and 32 years, are presented. These missiles were surgically removed. Today, compared to the past, the interval between the gunshot injury and the surgical removal of the missile from the mandible because of the use of antibiotics and improved surgery may be considerable.

Adult↗
PubMedDate not supplied

[The role of the alloy-specific elements iron, cobalt, chromium and nickel in aseptic loosening of total hip joint prosthesis].

The cause of aseptic loosening of total hip joint prostheses is still largely unexplained. In addition to mechanical forces, material factors may also be instrumental. In 16 patients with loosened hip prostheses who underwent re-operation (8 X Huggler-Weber, 8 X McKee-Farrar), the concentration of the alloy-specific elements cobalt, chromium, nickel and iron were determined in 58 tissue samples by means of neutron activation and emission spectrum analysis. An increase in the element concentrations was found in all the tissue samples, and this was unrelated to the time elapsed since implantation. The chromium concentration in particular was significantly elevated in all the tissue samples, in some patients with McKee-Farrar prostheses up to 10,000 times the norm. In view of the known toxicity of cobalt, chromium and nickel in high doses it seems that the presence of unphysiologically high concentrations of these elements in the vicinity of total hip joint prostheses represents an explanation of some of the loosened prostheses.

Chromium Alloys↗
PubMedDate not supplied

[Osteomyocutaneous flap].

A method for the reconstruction of the bony chin contour with an iliac crest free flap is described. The skin pad may be used to replace mucosa or skin or both. Excessive bulk can be a problem, particularly where a relatively small bone and oral mucosal defect requires replacement. Attempts at minimizing this bulk risk the loss of blood supply to the overlying skin. Another procedure, such as the internal oblique-iliac crest osseomyocutaneous flap or inclusion of the thoracodorsal pedicle with the scapular osteocutaneous flap, should then be considered.

Bone Transplantation↗