释义 |
dens serotinus third molar tooth [TA] eighth permanent tooth in the maxilla and mandible on each side, making it the most posterior tooth in human dentition; usually erupts between the 17th and 23rd years; the roots are often fused, the separation being marked only by grooves; because it tends to erupt in an anterosuperior direction, the lower third molar often becomes impacted against the lower second molar; it is common for one third molar (or more) to fail to develop. Synonym(s): dens molaris tertius [TA], dens serotinus ☆ , dens sapientiae, third molar, wisdom tooththird mo·lar tooth (thĭrd mō'lăr tūth) [TA] Eighth permanent tooth in maxilla and mandible on each side, making it most posterior tooth in human dentition; usually erupts between the 17th and 23rd years; roots are often fused, separation being marked only by grooves; because it tends to erupt in an anterosuperior direction, lower third molar often becomes impacted against lower second molar; common for one third molar (or more) to fail to develop. Synonym(s): dens serotinus [TA] , wisdom tooth. third mo·lar tooth (thĭrd mō'lăr tūth) [TA] Eighth permanent tooth in maxilla and mandible on each side, making it most posterior tooth in human dentition; usually erupts between the 17th and 23rd years; roots are often fused, separation being marked only by grooves; because it tends to erupt in an anterosuperior direction, lower third molar often becomes impacted against lower second molar; common for one third molar (or more) to fail to develop. Synonym(s): dens molaris tertius [TA] , dens sapientiae, dens serotinus, wisdom tooth. Patient discussion about dens serotinusQ. What are wisdom teeth? Why so many people talk about them and suffer from them? A. Wisdom teeth are the third and final set of molars that most people get in their late teens or early twenties. Sometimes these teeth can be a valuable asset to the mouth when healthy and properly aligned, but more often, they are misaligned and require removal. Wisdom teeth present potential problems when they are misaligned – they can position themselves horizontally, be angled toward or away from the second molars or be angled inward or outward. Poor alignment of wisdom teeth can crowd or damage adjacent teeth, the jawbone, or nerves. Wisdom teeth that lean toward the second molars make those teeth more vulnerable to decay by entrapping plaque and debris. In addition, wisdom teeth can be entrapped completely within the soft tissue and/or the jawbone or only partially break through or erupt through the gum. For complete article: http://www.webmd.com/oral-health/guide/wisdom-teeth This one is good also: http://en.wikipedia.org/wiki/Wisdom_teeth Hope this helps. More discussions about dens serotinus |