Biomedical subjects
F Kannmann
Publications and source records attributed to F Kannmann.
[Effect of traumatic occlusion on craniofacial growth. 1. Changes in the skull].
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[Effect of traumatic occlusion on craniofacial growth. 2. Changes in the mandible].
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[Metal-ceramic crowns. Preparation].
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[Skull deformities following unilateral mandibular dysfunction. 1. General review of secondary changes].
Communications 1 to 5 will deal with the significance of the masticatory muscles as a local factor affecting the shaping of the skull. The reports are based on experiments with dogs (Beagles) on which unilateral partial resection of the mandible was performed at different ages. The animals were slaughtered one year after the operation. 1st Bulletin: More or less severe scoliosis was observed in all skulls and proved to be the principal secondary change. The deviation was found to be particularly great in the region of the viscerocranium in all cases. Other findings include a flattening of the zygomatic arch and the linea temporalis on the operated side, close spacing of the front teeth, and deformation and reduction in size of the temporomandibular joint socket.
[Skull deformities as a consequence of unilateral mandibular imbalance. 2. Quantitative determination of secondary changes].
The measurement of the 2 halves of the skull were compared to permit quantification of the skull scoliosis and its dependency on age at the operation. It was found that the differences between the left and right sides at palate level decrease as the age at operation increases. There are no significant differences between the sides at palate level if the operation is performed at an age of 38 weeks. No distinct differences were observed between the sides in the zygomatic arch region at any age. No significant differences could be observed between the left and right sides of the neurocranium.
[Skull deformities as sequela of unilateral mandibular dysbalance. 4. Secondary changes in the mandible].
Distinct morphological changes were found one year after partial unilateral mandibular resection. The stump left after resection was smaller in all dimensions than the corresponding part of the intact half of the mandible, and the coronoid process inclined further posteriorwards as age increased. The temporomandibular joints were atrophized in all and arthrotically deformed in some cases. The intact halves of the mandibles presented a more or less S-shaped curvature in all cases. No dependence could be found between these changes and post-surgical age.
[Skull deformities as sequelae of unilateral mandibular dysbalance. 3. Studies of asymmetry based on frontal sections].
The areas obtained by planimetry of parafrontal sections showed distinct asymmetry in the region of the cavitas nasi in the Beagles that had been operated. Although differences between the sides were also observed in the skulls of the control Beagles, they were very slight. There were no differences between the left and right sides in regard of the areas of the cavitas cerebri in either the operated or the control Beagles. In the operated skulls they are slightly larger than normal, but in the control animals they are within the physiological range of variation.