Cases reported "Bites, Human"

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1/2. Analysis of tooth marks in a homicide case. Observations by means of visual description, stereo-photography, scanning electron microscopy and stereometric graphic plotting.

    In 1957 a woman was murdered in Oslo. Her left breast exhibited tooth marks. A man was arrested and sentenced to life imprisonment partly because of the dental evidence. He never admitted guilt and filed a petition for retrial. The present author was appointed as new dental expert. The material consisted of the fixed breast, models of the bite mark and models of the teeth of the convict, and several photographs. By means of visual examination, a magnifying glass, a lens stereoscope and a stereomicroscope characteristic details were noted. Stereoscopic picture pairs were taken, the material was studied by means of scanning electron microscopy and a stereometricgraphic plotting method permitting the outline of the tooth mark or the biting edge of a tooth to be registered in great detail in all three dimensions in the form of a contour map. This method has not previously been applied in the analysis of tooth marks in human skin. These examinations revealed no discrepancies but showed many corresponding characteristic features between the tooth marks and the teeth of the convict, resulting in the conclusion that it is highly probable that the tooth marks in the breast were made by the teeth of the convict.
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2/2. Traumatic self-inflicted bite with embedded tooth fragments in the lower lip.

    An unusual case of traumatic self-inflicted bite of the lower lip in a 7-year-old girl is presented. As a result of the bite, due to a fall, four fragments of the right upper incisor tooth were embedded in the lower lip. The large tooth fragment appeared 18 days later, protruding through the skin of the lower lip. Radiographs confirmed the presence of these tooth pieces, which were removed under local anesthesia. early diagnosis and surgical removal of the tooth fragments could prevent undesirable foreign-body reactions and scarring.
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keywords = tooth
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