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Biomedical subjects

C O Henrikson

Publications and source records attributed to C O Henrikson.

At least 37 records · Page 2Linked to original sources
PubMed1979

Alveolar bone mass using 125I absorptiometry.

Small changes in alveolar bone mass are very difficult to detect using radiograms. A method is described for registering minute changes in bone mass in restricted parts of the jaw. The method is based on the use of collimated monenergetic radiation from 125I and replacement of the roentgen film by a non-image forming detector. As the apparatus also can be used for measuring the object thickness, the attenuation formula can be used for calculating the alveolar bone mass. The radiation dose can be kept an extremely low level and the reproducibility of the measurements is high. The technique therefore may be used for long-term studies of changes in alveolar bone mass. The alveolar bone mass responds rapidly to changes in the neighboring tissues. The reaction following gingivectomy or dental trauma is characterized by a significant loss of alveolar bone mass initially. After 4 weeks an increase in the alveolar bone mass is noted and found to continue during the subsequent months.

Absorptiometry, Photon↗
PubMed1977

Mineralization in the midpalatal suture after orthodontic expansion.

A new method is described for an objective measurement of the mineralization in the anterior part of the midpalatal suture after its orthodontic expansion. The radioisotope 125I is used as radiation source and is placed intraorally in the same position on each measurement occasion. The extraoral part of the apparatus consisted of a scintillation crystal and a pulse-height analyzer to determine the number of roentgen quanta transmitted. The measurements showed that the mineral content within the suture rose rapidly during the first month after the completion of suture opening. In the bone beside the suture, the mineral content decreased sharply during the first month of measurement; later it returned to the initial level.

Child↗
PubMed1974

Quantitative long-term determinations of the alveolar bone mineral mass in man by 125-I absorptiometry. II. Following periodontal surgery.

The influence on the alveolar bone mineral mass of two common techniques of periodontal surgery, mucoperiosteal flap operation and gingivectomy, was investigated in patients with periodontal disease. The bone reaction, similar with respect to type of treatment, was characterised by a loss of mineral mass during three to four weeks after surgery. The maximum loss was 0.3 mg - mm-minus 2 on an average (10 to 15 per cent). A remineralization of the alveolar bone followed towards the presurgical level, which was reattained after four to six months.

Absorption↗