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ROOT. That part of a tree or plant under ground from which it draws most of its nourishment from the earth.
     2. When the roots of a tree planted in one man's land extend into that of another, this circumstance does not give the latter any right to the tree, though such is the doctrine of the civil law; Dig. 41, 1, 7, 13; but such person has a right to cut off the roots up to his line. Rolle's R. 394, vide Tree.
     3. In a figurative sense, the term root is used to signify the person from whom one or more others are descended. Vide Descent; Per stirpes.

A Law Dictionary, Adapted to the Constitution and Laws of the United States. By John Bouvier. Published 1856.
References in periodicals archive ?
For root canal therapy to be successful, the knowledge of accurate tooth length is essential.
Once diagnosed root canal therapy or surgical extraction of the affected tooth is the treatment of choice (13) and an antibiotic coverage acts as an adjunct to surgical therapy.
Common indications for root canal therapy were necrotic pulp 47.5% involving 95 teeth, irreversible pulpitis 42.5% involving 85 teeth, trauma 6.5% involving 13 teeth, short obturation 2.5% involving 5 teeth and chronic hyperplastic pulpitis 1% involving 2 teeth.
Root canal therapy in such type of traumatized teeth is mandatory.
Summary: TEHRAN (FNA)- Scientists say they have made an epoch-making advancement towards the next big treatment revolution in dentistry - the era in which root canal therapy brings diseased teeth back to life, rather than leaving a "non-vital" or dead tooth in the mouth.
Eight American academics draw on 150-plus years of combined experience in developing and teaching graduate endodontic programs and in managing private practices to create an easy-to-use, workbook approach to the provision of reliable nonsurgical root canal therapy. The 42 chapters are organized into sections covering examination and diagnosis; treatment strategies and decision- making; preparation for treatment; canal instrumentation--shaping, disinfection, and case management; endodontic obturation; and emergency and adjunctive endodontic procedures.
In spite of the seeming success of root canal therapy, Price discovered that the bacteria that caused the infection penetrated most of the dentin tubules and were not destroyed during the supposed sterilization process during root canal therapy.
None of the 30 people reported any post-treatment effects such as sensitivity, gingival irritation, tooth fracture, or a need for root canal therapy from tooth nerve damage (JADA 126.
The pain related to overuse usually causes people to stop bleaching before it does any significant harm, but it is possible that they could damage the nerve enough to require root canal therapy."
[1.] Nygaard-Ostby, B.N: Chelation in Root Canal Therapy, Odontol.Tidskr.