Biomaterial Database

Severe external apical root resorption associated with orthodontic treatment. 2006

Desmond Ong, and Patricia Medland, and Christopher Ho

School of Dentistry, oUniversity of Queensland, Brisbane.

External apical root resorption (EARR) is frequently associated with orthodontic treatment, however, the amount of root resorption is rarely of clinical significance. Severe EARR does, however, constitute a clinically significant problem. In contrast to the vast majority of the literature pertaining to EARR, the focus of this research project was restricted to only severe cases of EARR. The purpose of this study was to test whether frequently cited treatment-related variables played a significant role in the development of severe EARR. The difference between minor and severe EARR seems unlikely to be associated with the treatment that is received, but is instead inextricably linked to the genetic makeup of the patient.

UI	MeSH Term	Description	Entries
D008297	Male		Males
D009967	Orthodontic Appliances	Devices used for influencing tooth position. Orthodontic appliances may be classified as fixed or removable, active or retaining, and intraoral or extraoral. (Boucher's Clinical Dental Terminology, 4th ed, p19)	Appliance, Orthodontic,Appliances, Orthodontic,Orthodontic Appliance
D009971	Orthodontics, Corrective	The phase of orthodontics concerned with the correction of malocclusion with proper appliances and prevention of its sequelae (Jablonski's Illus. Dictionary of Dentistry).	Corrective Orthodontics
D011862	Radiography, Panoramic	Extraoral body-section radiography depicting an entire maxilla, or both maxilla and mandible, on a single film.	Orthopantomography,Panoramic Radiography,Pantomography,Orthopantomographies,Panoramic Radiographies,Pantomographies,Radiographies, Panoramic
D005260	Female		Females
D006801	Humans	Members of the species Homo sapiens.	Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D000704	Analysis of Variance	A statistical technique that isolates and assesses the contributions of categorical independent variables to variation in the mean of a continuous dependent variable.	ANOVA,Analysis, Variance,Variance Analysis,Analyses, Variance,Variance Analyses
D012391	Root Resorption	Resorption in which cementum or dentin is lost from the root of a tooth owing to cementoclastic or osteoclastic activity in conditions such as trauma of occlusion or neoplasms. (Dorland, 27th ed)	Resorption, Root,Resorptions, Root,Root Resorptions
D016009	Chi-Square Distribution	A distribution in which a variable is distributed like the sum of the squares of any given independent random variable, each of which has a normal distribution with mean of zero and variance of one. The chi-square test is a statistical test based on comparison of a test statistic to a chi-square distribution. The oldest of these tests are used to detect whether two or more population distributions differ from one another.	Chi-Square Test,Chi Square Distribution,Chi Square Test,Chi-Square Distributions,Chi-Square Tests,Distribution, Chi-Square,Distributions, Chi-Square,Test, Chi-Square,Tests, Chi-Square