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Register a new userThe effect of home tooth bleaching on the bond between veneers composite resins and tooth enamel
دراسة تأثر ارتباط وجوه الراتنج المركب المباشرة (الكومبوزت) مع الميناء السنية من خلال تطبيق التبييض المنزلي
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تألفت عينة البحث من 80 ثنية سليمة ومقلوعة تم الحصول عليها من العيادات الخاصة وقسم الجراحة ، وقد قسمت إلى مجموعتين اثنتين متساويتين، تم استخدام المادة الرابطة ClearFil SE Bond في واحدة منهما وتم استخدام المادة الرابطة OptiBond Solo Plus في الأخرى، وقسمت كل مجموعة إلى أربع مجموعات فرعية متساوية تم تطبيق الوجوه في الأولى منها دون إجراء أي تبييض للأسنان، وتم تطبيق الوجوه في الثانية قبل التبييض بأسبوعين وتم تطبيق الوجوه في الثالثة بعد التبييض مباشرة وتم تطبيق الوجوه في الرابعة بعد التبييض بأسبوعين, وكان الهدف من ذلك دراسة تأثير تبييض الأسنان المنزلي باستخدام فوق أوكسيد الكارباميد تركيز16 %على ارتباط وجوه الراتنج المركب الضوئية التصلب مع الميناء السنية وذلك بمقارنتها مع العينات الشاهدة غير المعرضة للتبييض وذلك خلال فترات محددة . تم وضع الأسنان في أسطوانات معدنية من خلال تثبيتها في قوالب أكريلية وقد تم فحص الارتباط . والنتيجة أن هناك دلالة إحصائية ما بين العينة الشاهدة والمجموعة الأولى التي تم فيها إجراء الوجوه قبل إجراء التبييض بأسبوعين
The research project sample consisted of 80 extracted central incisors obtained from the Oral and Maxillofacial Surgery Department as well as from private practices. These teeth were divided into two equal groups. The bonding agent ClearFil SE Bond was used in one group, whereas the OptiBond Solo Plus bonding agent was used in the other group. Each group was divided into four subgroups: (1) veneers performed without any bleaching, (2) veneers performed two weeks before bleaching, (3) veneers performed immediately following bleaching and (4) veneers performed two weeks after bleaching. veneers were made using a special template which allowed producing the same size of all the specimens used in this project. These veneers were placed on the vestibular surfaces of enamel of the extracted central incisors. The aim of the previous procedures was to study the effect of home teeth bleaching . Teeth were embedded in acrylic blocks created in metallic cylinders. The bonding strength was measured through . The results showed that there was a significant difference between the control subgroup and the second subgroup .
References used
Attin t, Buchalla w, Trett A:Tooth brushing abrasion of poly-acid modified composite in neutral acidic buffer solutions. J Prosthet Dent. 80(2):148-150,1998
Ben-Amar A,Liberman R, Bernstein Y:Effect of mouthguard bleaching on enamel surface : Am J Dent. 1995 Feb;8(1):29-32
Bishara SE, Oonsombat C, Soliman MM,Ajlouni R,Laffoon JF:The effect of tooth bleaching on the shear bond strength of orthodontic brackets. Am J Orthod Dentofacial Orthop. 2005 Dec;128(6):755-60
BOWEN RL. (1956) Use of epoxy resins in restorative materials. J Dent Res 35: 360-9
Bulut H,Turkun M, Kaya AD:Effect of an antioxidizing agent on the shear bond strength of brackets bonded to bleached human enamel Am J Orthod Dentofacial Orthop. 2006 Feb;129(2):266-72
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These days compositedefinitly became at the top of direct cosmetic restorations, and
the most using restorative material, due to this development now it's used for direct
Veneers &Lumineers.
Because of the high sensitivity of its application, gene
ral practitioner should achieve
a dry, clear work field, especially gingival area.
The aim of the study was to use the modified metal matrix, which used in this study,
is to retract the gum, isolate the tooth from the exudation of the sulcus and bleeding gum
avoiding margin leakage, also provide acceptable continuance between the restoration
surface and the under gum tooth structure, to prevent forming reverse stage under gum.
120 teeth were included in this study, all teeth were treated using the modified metal
matrix, 10 teeth at least for each patient, with no orthodontic treatment. The results have
practically proved getting all goals; retracted gum, tooth isolated from exudation of the
sulcus and bleeding gum, also provided continuance between veneers and under gum tooth
structure, and not having reverse stage which is the main cause of gum inflammation,
beside time saving and easy direct veneer application.
The etching primary teeth dentin is more important factors for bonding
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duration (7 or 15 seconds) for the composite bonding strength with primary molar dentin towards shear
strength.
Alterations of the enamel after topical application of bleaching
agents, presenting as major consequences are: ions release,
increased superficial roughness, stronger bacterial attachment
and hardness alteration.The aims of the study were to evalu
ate
the effect of the bleaching agent (35%hydrogen peroxide) for
vital teeth by using light source on the release of ions from the
enamel surface. our sample consisted of 30 sound enamel
surface for control group,30 sound enamel surface
for(35%hydrogen peroxide), and then application of light
radiation to activate the bleaching agent. Ion Chromatography
were used to measure the ions release .
This study aims to shorten the orthodontic treatment period
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materials which are used routinely in daily dental practice,
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area ( the area of the tooth to be moved) .
In this article we studied two types of teeth, spherical and
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flat tooth. the study of stresses field under these three teeth show
that in the soft rocks we prefer to use conical to
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easy to be Implanted in the rock, and this was confirmed by the
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our need for big values of pressure to shatter the rock we prefer to
use spherical tooth because of its property of forming tow cons of
stresses under tooth and therefore can be good in drilling hard
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