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Biomedical subjects

R Ewers

Publications and source records attributed to R Ewers.

At least 109 records · Page 6Linked to original sources
PubMed1985

Osteoclasts isolated in primary cell culture--a model to study conditional changes in vitro.

Osteoclasts have been isolated out of the bone marrow of laying hens kept on a low calcium diet for eight days. After purification the cells are cultured in a DMEM suspension. Development of the incubated single cells was observed up to 34 days and morphological changes are reported. No major difference could be found if the osteoclasts were kept on acrylic dishes or on gas permeable teflon dishes as a ground substrate.

Animals↗
PubMed1981

Bone fixation with screws and plates in the maxillo-facial region.

The treatment of fractures and osteotomies of the mandible and the midface show very different problems. The mandible must be treated in a stable and the midface in a static way. Due to the different bio-mechanics and topography of these bony structures, the advantages and disadvantages of treating a fracture in the maxillo-facial-region by the means of osteosynthesis will be discussed.

Bone Plates↗
PubMed1980

The influence of prognathism surgery on the width and the length of the lower third of the face.

The width and the length of the face in frontal view as important factors in facial harmony are analysed. Two groups of patients with mandibular prognathism were photographed, analysed and evaluated. The lower third of the face generally becomes shorter after a sagittal splitting operation as well as after a sagittal splitting plus additional medial ostectomy of the lower incisor region. In both groups we did not find a significant change in the width of the face. The impression of broadening the face by the sagittal splitting method is therefore subjective. In both groups, the face became more harmonious indimension following the osteotomies.

Cephalometry↗
PubMed1980

[Changes in the temporomandibular joint after orthodontic interventions].

Temporomandibular joint alterations were reported which were determined on the basis of reproducible preoperative and postoperative roentgenograms. The films were produced with the help of the Hanel. C arch in the transcranial, lateral oblique projection. Displacements were demonstrated particularly in the anterior and the caudal directions. This method however does not allow a definite statement to be made concerning the postoperative position of the condyles.

Humans↗
PubMed1980

[The effect of prognathism surgery on the temporomandibular joint. (A clinical and radiological evaluation of temporomandibular joint changes after various methods of surgery for prognathism)].

On the basis of clinical and roentgenologic examinations of progenia patients which were planned according to our occlusal concept and monitored postoperatively, we established that the condylar displacement in the roentgenogram offers an exact parameter for the extent of operative displacement of the condyles. Nevertheless, a direct conclusion concerning the clinical symptoms or freedom of complaints cannot be established on the basis of this roentgenographic analysis. The roentgenogram also showed considerable condylar alterations in patients with temporomandibular joint symptoms; greater displacement of the condyles was frequently demonstrable with temporomandibular joint complaints.

Humans↗
PubMed1980

[Injury to the inferior alveolar nerve caused by osteosynthesis screws].

The regeneration and degeneration of the proximal and distal parts of the nerve resulting from damage to the alveolaris nerve by osteosynthesis screws was studied in animal experiments. Twenty-four rabbits were divided into two groups of twelve animals each. In group A, the osteosynthesis screws were left in the nerve during the three-month study; in group B, these screws were removed after one week. A significant difference in the regenerative ability of the inferior alveolaris nerve was noted between group A and group B. The clinical experience that early removal positively affects the regenerative ability of the nerve was confirmed.

Animals↗