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It was theorized that positive selection for shovel-shaped incisors over the spatulate incisors is more commonly found within cultures that used their teeth as tools due to a greater structural strength in increased shovel-shaped incisors. [2] In some instances, incisors can present a more pronounced version of this called double shovel-shaped.
Horse teeth often wear in specific patterns, based on the way the horse eats its food, and these patterns are often used to conjecture on the age of the horse after it has developed a full mouth. As with aging through observing tooth eruption, this can be imprecise, and may be affected by diet, natural abnormalities, and vices such as cribbing .
A saw set is a tool or part of the tool kit for tuning saw blades. It adjusts the set , or distance the saw tooth is bent away from the saw blade. The magnitude of set determines the cut width and prevents the blade of the saw from binding in the wood.
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Kataochi gunome resembled saw teeth, whereas uma-no-ha gunome resembled horse teeth. Fukushiki gunome consists of multiple sizes and shapes of teeth mixed with areas of regularly sized and shaped teeth. Toran midare appears as a combination of tooth and wave, resembling rows of plunging breaking waves.
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Two horses of the same age may have different wear patterns. A horse's incisors, premolars, and molars, once fully developed, continue to erupt as the grinding surface is worn down through chewing. A young adult horse will have teeth which are 4.5-5 inches long, with the majority of the crown remaining below the gumline in the dental socket.
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