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Register a new userEffect of ultrasonic instrumentation on causing crack of ceramic fused to metal crowns (In-vitro study)
تأثير الاهتزازات فوق الصوتية في تصدع التيجان المعدنية الخزفية
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Aِl-Baath University ورقة بحثية
Publication date
2018
fields
Dentistry
and research's language is
العربية
Created by
Shamra Editor
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تستخدم الاهتزازات فوق الصوتية لنزع القلح و التصبغ و تجريف الجيوب حول السنية كما تستخدم في سياق نزع التيجان الكاملة المعدنية و المعدنية الخزفية و بالتالي فإن الرؤوس المستخدمة سواءً للتقليح أو للنزع تكون على تماس مباشر مع هذه التيجان لذلك كان هدف الدراسة تقييم سطح التيجان المعدنية الخزفية بعد تعرضها للاهتزازات فوق الصوتية.
Vibration of Ultrasonic has used for scaling and periodontal curettage, it is also has used for metal crown and metal-ceramic crown removal, subsequently, using the tips whether for scaling or removing crown, they will be in direct contact with this crown, This research aimed to evaluate the surface of metal-ceramic crown after exposure to Vibration of Ultrasonic tips.
References used
Arabaci T, Cicek Y, Canakci C. Sonic and ultrasonic scalers in periodontal treatment: a review. International journal of dental hygiene. 2007;5(1):2-12
Pameijer C, Stallard R, Hiep N. Surface characteristics of teeth following periodontal instrumentation: a scanning electron microscope study. Journal of periodontology. 1972;43(10):628-33
Kerry GJ. Roughness of root surfaces after use of ultrasonic instruments and hand curettes. Journal of periodontology. 1967;38(4):340-6
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It was recently noted that there are
serious trials to develop dental materials used in the prosthodontics.
As a result of this development, some veneering ceramic systems
used in metal-ceramic crowns have been appeared. In view of the
major impo
rtance of marginal fit and its role in the success of
restoration it must be a study and evaluation of marginal fit for these
modern systems.
This research aimed to comparasion of marginal fit for metal ceramic
crowns using two types of veneering ceramic.
The idea of use ceramic margins for metal-ceramic crowns was founded to
overcome problem of grayness for gingival margins that caused by metal collar in metal-ceramic crowns ,
but at the same time there are a lot of cautions on decrease mechanical
resistance for these restorations.
This study aims to study fracture resistance of metal-ceramic crowns with ceramic margins in 1 or 2 mm.
long, and compare it with mechanical resistance of metal-ceramic crowns with metal collar.
Porcelain has a long history of fixed prosthodontics to achieve optimum beauty by color. However, there is a lack of information on how the color of different thicknesses of ivory porcelain is affected by repeated exposure to baking.
With the increase in the number of adult patients seeking orthodontic treatment, the need to ensure sufficient bonding strength for the fixed orthodontic components on the ceramic restorations has become an urgent matter. Adhesion of the orthodontic
bracket is an essential and indispensable step.
The aim of this laboratory study was to evaluate the
internal fit of lithium disilicate glass ceramic laminate veneers
fabricating using heat-pressing technique and cemented using two
types of adhesive resin cement.
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