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These tree-like lesions resemble feathering or ferning, and are also called Lichtenberg figures. [8] The marks are formed when capillaries beneath the skin rupture due to the electrical discharge and they usually appear "within hours" of the strike though they tend to disappear within a few days.
Lichtenberg branching figure in leopardwood Fractal burning , Lichtenberg burning or wood fracking refers to a technique where a Lichtenberg figure is burnt into wood using high voltage electricity.
A Lichtenberg figure (German: Lichtenberg-Figur), or Lichtenberg dust figure, is a branching electric discharge that sometimes appears on the surface or in the interior of insulating materials. Lichtenberg figures are often associated with the progressive deterioration of high-voltage components and equipment.
Scarification can be used to transmit complex messages about identity; such permanent body markings may emphasize fixed social, political, and religious roles. [1] Tattoos, scars, brands, and piercings, when voluntarily acquired, are ways of showing a person's autobiography on the surface of the body to the world. [7]
Typically, humans have 20 primary teeth and 32 permanent teeth. [9] The dentition goes through three stages. [10] The first, known as primary dentition stage, occurs when only primary teeth are visible. Once the first permanent tooth erupts into the mouth, the teeth that are visible are in the mixed (or transitional) dentition stage.
Taurodontism can present in deciduous or permanent dentition, unilaterally or bilaterally, but is most common in the permanent molar teeth of humans. The underlying mechanism of taurodontism is the failure or late invagination of Hertwig's epithelial root sheath , which leads an apical shift of the root furcation.
Management of intrusion depends on several factors such as whether the tooth has a closed or open apex, type of teeth (primary or permanent dentition) and how much the tooth is intruded in mm. This type of dental trauma is complex and is commonly associated with pulpal necrosis and inflammatory ankylosis.
Usually, there are 20 primary ("baby") teeth and 32 permanent teeth, the last four being third molars or "wisdom teeth", each of which may or may not grow in. Among primary teeth, 10 usually are found in the maxilla (upper jaw) and the other 10 in the mandible (lower jaw). Among permanent teeth, 16 are found in the maxilla and the other 16 in ...