root formation

root formation

The development of tooth roots by Hertwig's root sheath and the epithelial diaphragm. It involves the formation of root dentin with a covering of cementum essential for the attachment of the tooth to the surrounding bony tissues. Root formation or development continues for months or years after the tooth has erupted into the mouth.
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References in periodicals archive ?
One of the important elements for the rooting of apple cuttings is zinc (Zn), which is an activator of tryptophan, an auxin precursor necessary for root formation. The age of the mother plant also exerts an influence on the propagation capacity of rootstocks, since younger plants root more easily rooted.
A small, heated propagator would help to stimulate root formation and these can be picked up quite cheaply.
Nitrogen helps in establishment of healthy leaves, phosphorus for root formation, potassium for fruiting while secondary nutrients such as calcium and magnesium, among others, are critical for crop physiological functions.
It is believed that carbohydrates do not act directly in rooting, but they are source of energy and carbon for synthesis of substances essential for root formation, such as plant hormones (SOUZA; PEREIRA, 2007).
Adventitious root formation of kiwifruit in relation to sampling date, IBA and Agrobacterium rubi inoculation.
As a result various dental malformations including sequestration of permanent tooth germ, partial or complete arrest of root formation, root dilacerations, crown dilacerations, developmental disturbances of enamel and eruption problems can occur in the permanent teeth.3
Moreover, severe attrition or fracture of the protuberance frequently leads to pulp necrosis and apical periodontitis, often prior to complete root formation. Such patients usually require corrective endodontic procedures, such as apexification and subsequent obturation in teeth with immature apices, or tooth removal (14).
One month after transferring to rooting medium without plant growth regulators, root formation was only observed in the media in which salt concentration was half that of WV5 medium, which occurred in 14.28% of the explants with an average of the roots of all explants necrosd after 45 days on the substrate.
In this study, strong root formation was observed for middle and apical stem cuttings and for stem cuttings between 10 and 20cm in length.
Transplantation of mandibular premolars with root formation of two-thirds to three-quarters and wide open apex provides the best prognosis for the pulp survival and reduces the risk of resorption [8-11].
Plantlet Regeneration, Shoot Elongation, Root Formation, and Acclimatization of the Regenerated Plants.