In Vitro And In Vivo Studies Of Glass Ionomer Cements In The Bonding And Banding Of Orthodonotic Attachments

Author : Priya K
Publisher :
ISBN 13 : 9781520466972
Total Pages : 95 pages
Book Rating : 4.4/5 (669 download)

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Download or read book Retention of the Orthodontic Bands... Invitro Study written by Priya K and published by . This book was released on 2017-01-26 with total page 95 pages. Available in PDF, EPUB and Kindle. Book excerpt: RETENTION OF THE ORTHODONTIC BANDS... IN VITRO STUDY - authored by DR. PRIYA K, MDS. DR. PRIYA K is a renowned scholar and author from India. She is a brilliant medical professional with a Masters degree in Dental Surgery in Orthodontics and Dentofacial Orthopaedics from M.S.Ramaiah Dental College, Bangalore. Born in Palakkad and educated in Bangalore, she is a highly respected teacher of medical profession and widely appreciated for her gentle and friendly disposition. A wonderful and charming person in essence, as graceful and perfect as she is, she is highly regarded for her kind and selfless nature. She started her teaching career at senior levels at Sri Rajiv Gandhi Institute of Dental Sciences and Research, Bangalore and later as the senior-most Reader at Sri Guru Ram Das Institute of Dental Sciences and Reaserch, Amritsar. The latter Institute has honoured her by awarding her the prestigeous membership of the Editorial Review Board of its scholarly Journal, Indian Journal of Comprehensive Dental Care (IJCDC). Dr. Priya K presently lives in Bangalore. Orthodontic band has been in clinical use for more than 100 years. In spite of the wide spread use of direct bonded brackets and tubes in clinical orthodontics, the conventional band still plays an important role in fixed appliance therapy.Although bonding of orthodontic tubes to the teeth is receiving much current interest in the form of indirect bonding, the vast majority of buccal attachments are still being cemented using stainless steel bands and conventional cements, considering the force levels in the posterior region. Enamel demineralization under orthodontic bands is a serious, but a common problem to all orthodontists. White spot formation or enamel decalcification can occur whenever bacterial plaque is retained on enamel surface for a prolonged period.By the presence of fixed appliance the efficiency of home prophylactic procedure is greatly reduced and there is a need for protection of adjacent enamel surface. Inadequate bonding strength of dental cement, seal break down, solubility of the currently used dental cements in oral fluids and poor oral hygiene all contribute to the initiation of decalcification.Several studies in the past have investigated the chemical composition of various cements, their physical and chemical properties and their application as well as use in restorative dentistry. The retention of orthodontic bands to the tooth surface is important to ensure fixed appliance therapy. Numerous agents have been used to retain orthodontic bands. Guttapercha, zinc oxide eugenol, zinc polyacrylate cement, zinc polycarboxylate cement, resin based cements, zinc silicophosphate and black copper cement have all been investigated. More recently attention has been focused on glass ionomer cement.Sand blasting of the metal surface improves retention by roughening, thereby increasing the surface area and providing a potential for a degree of mechanical attachment . It not only increases the retentive area of the band luting surface, but also removes contaminants and thins the stainless steel oxide layer leaving a more firmly attached layer for bonding.This technique of air abrasion or sand blasting was introduced in 1950's. It uses a high-speed stream o f aluminum oxide particles propelled by compressed air. Although initially reintroduced as a method to roughen the surface of any dental materials before cementation, it is routinely used in cast metal restoration to enhance the bond strength; more recent marketing includes its application to orthodontics to roughen the internal surface of the bands and bracket bases.This in-vitro study is undertaken to explore and emphasize the possibilities of increasing bond strength with newer hybrid cement s and subsequently sand blasting the inner surface of the bands to enhance bond strength.