scholarly journals A comprehensive review on loops in orthodontics

2021 ◽  
Vol 7 (3) ◽  
pp. 191-207
Author(s):  
Shetty Suhani Sudhakar ◽  
Kamath Apoorva Shrinivasa ◽  
Praveena Shetty ◽  
Glodwin Antony ◽  
Sachin Shaji M

Extraction therapies are commonly done in patients with protrusion and/or crowding which demands a thorough understanding of biomechanics. Two basic types of space closing mechanics are friction/sliding and frictionless/loop mechanics. In the former, the wire and position of the bracket are important factors in tooth movement but the simplicity of friction mechanics is offset by the binding between bracket and archwire and may be associated with undesirable side effects such as uncontrolled tipping and deep bite. In frictionless mechanics, specially designed springs are used which provides the required moment to force ratio (M/F ratio) in three dimensions and they are more predictable and versatile. An electronic literature search was conducted via google scholar, PubMed, and dental associations’ of different countries’ website using the key word “Loops” and “Frictionless mechanics.Different configuration of loops have been used in orthodontic treatment and a comprehensive review of types of loops commonly used in retraction has been highlighted in this article.: Provide appropriate messages of about 35-50 words to be printed in centre box:In frictionless mechanics, specially designed springs are used which provides the required moment to force ratio in three dimensions and they are more predictable and versatile. Different configuration of loops have been used and a comprehensive review of types of loops commonly used in retraction has been highlighted in this article.

2018 ◽  
Vol 6 (02/03) ◽  
pp. 053-056
Author(s):  
Ritunja Singh ◽  
Shilpa Chourasia ◽  
Palak Sharma ◽  
Soumya Gupta ◽  
Gangesh Singh ◽  
...  

AbstractPeriodontally accelerated osteogenic orthodontics (PAOO), also known as Wilckodontics, is a clinical procedure that combines corticotomy (a surgical technique in which the bone is cut, perforated, or mechanically altered), particulate bone grafting, and orthodontic force application. By this procedure, the teeth can be made to move through the bone rapidly by means of harnessing and stimulating the innate potential of the bone and utilizing tissue engineering principles. Once the tooth movement gets completed, bone rebuilds around the tooth, thereby reducing the time of orthodontic treatment from years to months. This article aims to present a comprehensive review about PAOO or Wilckodontics.


2021 ◽  
pp. 030157422110044
Author(s):  
Susmita Bala Shenoi ◽  
Anand Badavannavar

The crimpable hook is a widely accepted tool onto which active elements can be fixed to aid in orthodontic tooth movement. This clinical pearl aims at showing the different ways in which crimpable hooks can be used to better orthodontic treatment mechanics, which are Crimpable hooks used for buccolingual force mechanics and Crimpable hooks used in conjunction with orthodontic miniscrews. The above-mentioned simple methods aim to facilitate and make easy the attachment of force elements for various kinds of tooth movements. It can help the operator to save time, prevent unwanted side effects of forces, as well as reduce the need for ligature wires for the attachment of force systems onto implant heads or lingual sheaths.


2018 ◽  
Author(s):  
Ashley Williams ◽  
Morgan Taylor ◽  
Andrew Boyd ◽  
Richard Williamson ◽  
John Stuart ◽  
...  

Acute Pancreatitis is an inflammatory condition of the pancreas which is characterized by abdominal pain and elevated pancreatic enzymes in the blood. Acute pancreatitis is one of the leading gastrointestinal cause of hospitalization in the United States. Etiology of acute pancreatitis is diverse with many causes attributed to it. Alcohol abuse and gallstones are the leading causes of acute pancreatitis. We a carried a literature search for etiology of acute pancreatitis using the online databases of PubMed, Embase, Scopus, Google Scholar. We reviewed the pertinent articles about acute pancreatitis and its etiology. The review is an attempt to provide a better understanding of the possible various etiologic causes of acute pancreatitis.


2012 ◽  
Author(s):  
Mei Li ◽  
Qingsong Ye ◽  
Qu Wenwen ◽  
Taixiang Wu ◽  
Qiao Ju

Author(s):  
Mei Li ◽  
Qingsong Ye ◽  
Qu Wenwen ◽  
Taixiang Wu ◽  
Qiao Ju

2021 ◽  
Vol 11 (2) ◽  
pp. 521
Author(s):  
Simina Chelărescu ◽  
Petra Șurlin ◽  
Mioara Decusară ◽  
Mădălina Oprică ◽  
Eugen Bud ◽  
...  

Background: The crevicular fluid analysis represents a useful diagnosis tool, with the help of which noninvasive cellular metabolic activity can be analyzed. The aim of the study is to investigate comparatively IL1β and IL6 in the gingival crevicular fluid of clinically healthy adolescents and young adults during the acute phase of orthodontic treatment. Methods: Gingival crevicular fluid was collected from 20 patients (aged between 11 and 28) undergoing orthodontic treatment. Measurements were taken before (T0) and after 24 h after distalization forces were activated (T1). IL1β and IL 6 were analyzed using Elisa tests. The statistical tests used were two-sided t tests. Results: Between the two time periods there was a significant raise both in the crevicular fluid rate (0.57 µL at T0 vs. 0.95 µL at T1, p = 0.001) and in IL1β levels (15.67 pg/µL at T0 vs. 27.94 pg/µL at T1, p = 0.009). We were able to identify IL6 only in a third of the sites. There is a significantly increased level of ILβ at T1 in adolescents, more than in young adults (42.96 pg/µL vs. 17.93 pg/µL, p = 0.006). Conclusions: In the early stage of orthodontic treatment, the periodontal tissues of adolescents are more responsive to orthodontic forces than those of young adults.


2021 ◽  
pp. 232020682110034
Author(s):  
Hamad Alzoman ◽  
Khalid Alamoud ◽  
Waad K. Alomran ◽  
Abdullazez Almudhi ◽  
Naif A. Bindayel

Aim: To evaluate the periodontal status before and after orthodontic treatment and to analyze the confounding factors associated with it. Materials and Methods: The present retrospective study analyzed pre- and posttreatment records of a total of 60 patients. Intraoral digital photographs before and after the orthodontic treatment were used to measure the following three periodontal variables: (a) width of the keratinized gingiva, (b) gingival recession, and (c) the status of interdental papilla. The ImageJ 46 software imaging program was used to perform the required measurements. The clinical data were then analyzed in an association with the participants’ demographic data, the type of orthodontic tooth movement, and other confounding factors. The data obtained were manually entered into the statistical package and analyzed using a significance level set at P < .05. Descriptive statistics, paired t-tests, and Pearson’s correlation analysis were used to identify differences among the studied variables. Results: Among the 60 patients, the majority (66.7%) were females. Most cases of the treated malocclusion were Class II, and most patients underwent intrusion and retrusion movements. The width of keratinized gingiva increased for most sites of upper teeth. In contrast, the lower teeth showed a mix of improvement and compromised width of keratinized gingiva. As a measure of gingival recession, the difference of clinical crown height revealed the tendency toward a reduced clinical crown height for most sites. Upper left lateral incisors and canines showed significant values with regard to keratinized gingival width measurements and tooth movements such as extrusion and intrusion movements. Likewise, with regard to the clinical crown height, upper right central incisors showed significant differences when correlated with the interincisal angle, lower incisors to the mandibular plane, and upper incisors to the NA line. The upper lateral incisors also showed significant correlations to certain cephalometric measurements. Conclusions: The orthodontic treatment was found to exert a significantly positive impact on the surrounding periodontium, particularly in the upper canine areas. Likewise, various types of tooth movement were found to positively affect the periodontium.


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