The University of Massachusetts explains that peristome teeth serve as a valve that allows the spores to exit the capsule. The peristome teeth open and splay outward during times of low humidity, allowing the spores to float away and disperse.Know More
The University of Massachusetts states that the peristome teeth are one of the most characteristic features of mosses. They are formed from the remnants of the cell wall, and are fiber-like in structure. As their name, which literally means "around mouth," implies, peristome teeth form a rim around the mouth of the capsule, according to Wikipedia.
The University of Hamburg explains that all mosses except graphite mosses possess peristome teeth. The teeth are constructed from two different layers. One layer readily absorbs and releases water, while the other layer does not react very much to varying humidity levels. This causes the teeth to bend outward during times of low humidity.
The University of Hamburg states that some mosses have peristome teeth that work in other ways. For example, Funaria mosses have slits between the teeth that expand during dry periods. In other mosses, such as Polystrichum mosses, the peristome teeth do not respond to moisture. Mosses without peristome teeth have evolved other methods for dispersing their spores.Learn more about Dental
Colleen Cancio explains on HowStuffWorks that a person can straighten his teeth without braces by using aligners, retainers, contouring or veneers. Clear, plastic removable aligners are the most popular alternatives to braces.Full Answer >
Several options exist to recalcify teeth, depending on the severity of the decalcification. Over-the-counter and prescription toothpastes containing calcium and phosphorus can help remineralize teeth, as can prescription-strength fluoride toothpastes, according to AskAnOrthodontist.com. The recalcification process can take several months. If the toothpastes do not work, a dentist can fill the decalcified area on a tooth with an infiltrating resin, called Icon, that repairs the tooth.Full Answer >
It is impossible to straighten one's own teeth at home by pushing on them, and doing so can result in tooth loosening or tooth loss, warns Vincent G. Kokich, a private practice orthodontist. He explains that teeth only move when under constant pressure, so intermittently pushing on one's own teeth cannot straighten them. Orthodontic braces, which come in various forms, are necessary to achieve a straight smile.Full Answer >
A mouth guard can prevent teeth grinding during sleep. A mouth guard is a covering worn over the teeth to protect them from injury. Teeth grinding, or bruxism, can be caused by stress. Finding ways to reduce stress can help prevent teeth grinding.Full Answer >