This research did not receive any specific grant from funding agencies in the public, commercial, or not-for-profit sectors. 0000059660 00000 n They'll give your presentations a professional, memorable appearance - the kind of sophisticated look that today's audiences expect. Material options for restoring a teeth Generally, choice of dental filling material should be based on the patient's case history, clinical, radiographic and other relevant findings. These developments aimed to synchronize the clinical demands and the material’s properties. 3. Purpose: The purpose of this study was to assess the marginal integrity of composite and glass-ionomer restorations as a function of finishing technique, restorative material and margin location. 0000057195 00000 n Why is catalase so fast? Published by Elsevier Ltd. Arabinosyltransferase C enzyme of Mycobacterium tuberculosis, a potential drug target: An insight from molecular docking study, Role of high shear mixing in improving stability and bio-efficacy of botanical oil in water formulation for early stage mosquito eradication, Preparation of sweet potato extract (SPE), Preparation of experimental bleaching solution (HSP). 0000004278 00000 n The implication of the study is that the risk of microleakage is increased when resin restorations are done immediately after bleaching. 0000014328 00000 n This in vitro study evaluated the marginal microleakage of a bioactive restorative with other restorative materials in standard Class V preparations. Marginal integrity: clinical significance. The marginal integrity of restorations is an important parameter as marginal gap formation is associated with recurrent caries and pulpal disease. 0000006747 00000 n Multiple comparison was done using Tukey's HSD post hoc test. /�EI��H�yI,�P�~ �I�T2d��w��R��y�p�'����׃��C[�hЗ�W���J�g��^-������6=˦�T�������Ҫ4��o�C��s՞i���PQ��U? The clinical evaluation of marginal behaviour is also questionable due to the lack of reliable diagnostic skills of the clinician. September 2006 ; Clinical Oral … (�z���"͈{�ߜD�������o�����CM'j�2��aA�Qv�$�������,B�yF���A���V�3��������('�=8V�8�(���#S .����U�S�S�s�s�6q���J\�)��U�_�>�������07�Ȓ� ы�����)k,�*l�+� (:� endstream endobj 572 0 obj <> endobj 573 0 obj <> endobj 574 0 obj <>stream Three approximately 150 … 0000011455 00000 n Objective . Testing of marginal integrity in vitro is viewed with uncertainty due to interactions and interpretation problems. Restoration of the endodontically treated posterior tooth. |i����)�s6��=�ey It is a function of the chemical composition, setting method, and aging procedures. • The gold standard for ceramic restorations is clearly porcelain-fused-to-metal (PFM). 0000002523 00000 n The aim of this chapter is to describe the armamentarium that can be used to finish and polish different types of restorative material. INFLUENCE OF THERMAL STRESS ON MARGINAL INTEGRITY OF RESTORATIVE MATERIALS. 2016 Dec 1;35(6):869-875. doi: 10.4012/dmj.2015-339. 0000049821 00000 n The morphology, marginal integrity, and materials' integrity were examined. }�N3�n]�C �A�:�tEn�Rt�EC:�b���z����;���}����BᯤҘ�L�G�2E����2��/�wT���8�E���ļ0��+a6� 8�`�l�Œ���A�H� k$k��=s��&�����[���Ӣ�J�E+�-��T��V�[�Yq������ނ��;�N�V|>��'�nN�ܜ�9�9qsps�������͉��/rp��#�Iӏ�(o!�hL�8̈́LC��1�]�iNɭ~ ��� endstream endobj 568 0 obj <> endobj 569 0 obj <> endobj 570 0 obj <> endobj 571 0 obj <>stream 0000005025 00000 n Addition of SPE to the bleaching agent is capable of averting this risk, enabling immediate and durable bonding procedures. 0000017803 00000 n This results in loss of prismatic substance and an over-etched appearance (. 0000003962 00000 n J. Dent. The research hypothesis was that the model composite based on POSS would present low volumetric polymerization shrinkage, reduced shrinkage stresses and better marginal integrity than the other tested composites. Composites have an extremely wide field of indication by excellent mechanical properties and aesthetics. We use cookies to help provide and enhance our service and tailor content and ads. 0000025650 00000 n Bleaching agents increases the surface roughness of composite resins and decrease microhardness of composite and tooth surface. 0000014446 00000 n A bioactive restorative material can display one or more of the following actions: 1. View and Download PowerPoint Presentations on Selection Of Restorative Material PPT. Furthermore, the marginal integrity of the caries‐free controls with less extension in pulpal direction did not differ from the marginal integrity observed in the other groups. Effect of pre and post operative bleaching on microleakage of amalgam and composite restoration using 10% carbamide peroxide – an invitro study. The poor bonding characteristics of composite to bleached teeth can be countered by either postponing restorative work by two to three weeks or using antioxidants such as sodium ascorbate, proanthocyanidin or green tea extract for immediate bonding, as suggested by various authors. Samples bleached with HSP showed minimal or no marginal gap which was comparable to that of the unbleached controls. Accepted: Periodontal evaluation of restorative materials Amalgam •Surface roughness •Marginal discrepancies •Galvanism •Chemical irritation The Effect of Dental Restoration Type and Material on Periodontal Health, Khansa Taha Ababneh, Oral Health Prev Dent 2011; 9: 395-403. GENERAL DENTISTRY May/June 2018 . 0000012116 00000 n NB-No bleaching, HP-Bleaching with 30% hydrogen peroxide, HSP- Bleaching with 30% hydrogen peroxide containing sweet potato extract. Characterization and stability of anthocyanins in purple-fleshed sweet potato P40. 0000019103 00000 n 0000012761 00000 n Specimens were immersed in a 1% basic fuchsine solution (24 h), cleaned and rinsed in tap water. The restoration of endodontically treated teeth remains a challenge. 0000006521 00000 n Braz Oral Res 2005;19(4):295-301. Please enter a term before submitting your search. Dental amalgam has been the most commonly used restorative material in posterior teeth for over 150 years. Each of these groups were further divided into three subgroups based on the intracoronal bleaching agent used: subgroup A: no bleaching; subgroup B: bleaching with 30% HP - a pellet of cotton dipped in 30% HP was placed inside the pulp chamber and sealed temporarily with Cavit (3M ESPE, St. Paul, MN, USA) and; subgroup C: bleaching with HSP - the same protocol as in subgroup B was followed. Comparing the alkasite restorative material with conventional packable composite, there seems to be a superior marginal seal with no marginal gap in samples restored with Cention N. This can be related to the lower polymerization shrinkage, increased wettability and low water sorption exhibited by this new material (. Bleaching with only 30% HP showed the widest marginal gap values with both the restorative materials. Evaluation of the marginal integrity of a bioactive restorative material . 0000022516 00000 n Reprinting the classic article on USPHS evaluation methods for measuring the clinical performance of restorative materials. 0000005326 00000 n �Cq�&�B�����e{��V2�b�=��'ۥ�l��� �3o��N+��ѣ�Ii�p57'F��fyR ��S,�e����z\:=V��? Purpose: To investigate the influence of three cavity designs on the marginal seal of large Class II cavities restored with low-shrinkage resin composite limited to the enamel. NANO ORMOCER® RESTORATIVE MATERIALS Admira Fusion NANO ORMOCER TECHNOLOGY ADMIRA FUSION NEXT GENERATION SOLUTION 1.2% SHRIN-KAGE NANO NEW INNOVATION PRECISION EXCELLENCE VOCO ALL CERAMIC GROUND BREAKING PARADIGM SHIFT EVOLUTIONARY PURESILICATE THE FIRST ALL CERAMIC DIRECT RESTORATIVE MATERIAL THE IDEA IS NOW A … The results of the study show that single step bleaching using HP with SPE as an additive has the potential to nullify the deleterious effects of HP on enamel and scavenge the free radicals resulting in a good marginal seal of the ensuing restoration. This study was conducted to explore the effect of thermal cycling on marginal integrity analyses of 3 restorative materials, considering different thermal cycling regimens. Bleaching agents can remove the outer staining from compos-ite resins. This can be attributed to the presence of free radicals from HP, which not only act on the chromogenic pigments, but also attack the enamel surface causing surface alterations. 0000002157 00000 n The clinical evaluation of marginal behaviour is also questionable due to the lack of reliable diagnostic skills of the clinician. By continuing you agree to the, https://doi.org/10.1016/j.heliyon.2020.e03424, Marginal integrity of aesthetic restorations following intracoronal bleaching with sweet potato extract as an additive: An SEM study, http://www.jcd.org.in/text.asp?2007/10/1/33/42278, https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5608062, https://juniperpublishers.com/adoh/pdf/ADOH.MS.ID.555762.pdf, http://www.jcd.org.in/temp/JConservDent16145-5097245_140932.pdf, View Large 2020, Received in revised form: Recent developments in the province of material sciences, some novel materials require direct association with oral environment for renewal, recharging or enhancing of the constituents of the restoration to improve marginal integrity to decrease bacterial microleakage. Recently, an improved marginal seal has been demonstrated with the introduction of a new alkasite restorative material over conventional packable composite (. 0000022846 00000 n 0000010054 00000 n In the quest for aids to reduce the harmful effects of HP, studies have been focused on plant tubers like Ipomoea batatas L (sweet potato) which contains a diversity of antioxidant molecules like catalase, superoxide dismutase and anthocyanins with high radical scavenging activity (, Antioxidant and peobiotic activity of five peonidin-based anthocyanins extracted from purple sweet potato (. The marginal integrity of restorations is an important parameter as marginal gap formation is associated with recurrent caries and pulpal disease. The quantifications were analysed as to their variance for the factors alloy, polishing procedure, operator and patient. Testing of marginal integrity in vitro is viewed with uncertainty due to interactions and interpretation problems. By continuing you agree to the use of cookies. 0000022108 00000 n Typical resin composites applied in restorative dentistry exhibit volumetric shrinkage values from less than 1% up to 6%, depending on the formulation and the curing conditions. Sixty previously extracted, noncarious human molars were randomly assigned to 3 experimental groups (n = 20): a bioactive composite resin, a universal … The choice of restorative material depends on each clinical case and it is a responsibility of a dentist. Multiple comparisons of the mean marginal gap of all the groups. it relates to marginal integrity and micro-leakage and in the end the overall integrity and longevity of the restoration. There is no currently avail- able materials that meet all the requirements for the ideal ma-terial, and each possess its own advantages and disadvantages. 0000004672 00000 n As a result, now you can take your restorative practice to the next level with a new generation of CAD/CAM composites offering high flexural strength, better marginal integrity, fast milling, and tooth-resembling esthetics. The aim of this study was to evaluate the influence of thermal stress on the marginal integrity of restorative materials with different adhesive and thermal properties. In vitro comparison of the cytotoxicity and water sorption of two different denture base systems. These two factors guarantee optimal mar-ginal integrity of the restorative material and thus significantly Preparation and properties of water-soluble polyester surfactants. varnish up to 1 mm of the restorations’ margins. Comparative effect of self- or dual-curing on polymerization kinetics and mechanical properties in a novel, dental-resin-based composite with alkaline filler. At this time, restoration of noncarious cervical lesions (NCCLs) is a common occurrence in clinics nowadays. The aim of this study was to evaluate the influence of thermal stress on the marginal integrity of restorative materials with different adhesive and thermal properties. Purpose: The purpose of this study was to assess the marginal integrity of composite and glass-ionomer restorations as a function of finishing technique, restorative material and margin location. The aim of this study was to evaluate the influence of thermal stress on the marginal integrity of restorative materials with different adhesive and thermal properties. 0000024140 00000 n The palatal surface of the specimens were then sputter coated with gold and viewed using a scanning electron microscope (SEM Phenom Pro, Einthovan, Netherlands) under 1000x magnification. Forms an apatite-like material on its surface when immersed in body fluid or simulated body fluid (SBF) over time.4. 0000003540 00000 n Compomer is widely accepted as a standard restorative material for primary dentition for Class I and II cavities. 0000005682 00000 n Marginal adaptation of provisional restorations is a critical property of these treatments. Inlays and onlays are used in molars or premolars, when the tooth has experienced too much damage to support a basic filling, but not so much damage that a crown is necessary. This in vitro study evaluated the marginal microleakage of a bioactive restorative with other restorative materials in standard Class V preparations. January 5, According to the manufacturer, other benefits of the restorative are an “intimate adaptation to tooth structure” and “exceptional marginal integrity.”4This so-called smart material purportedly interacts with the constantly changing pH levels of the oral cavity to enhance and revitalize the physical properties of the tooth structure as well as the material itself (fracture resistance, durability, and toughness).4 Roulet JF (1). 0000053126 00000 n Comparative evaluation concerned 4 composites of a bulk-fill type: SonicFill, Tetric EvoCeram Bulk Fill, Filtek Bulk Fill, and SDR. Typical resin composites applied in restorative dentistry exhibit volumetric shrinkage values from less than 1% up to 6%, depending on the formulation and the curing conditions. In addition, these resins react to pH changes in the mouth by uptaking calcium, phosphate, and fluoride ions ultimately helping to maintain the chemical integrity of the tooth structure. Abstract. During bleaching, hydrogen peroxide (HP) ionizes to release free radicals and nascent oxygen, which break down the larger chromogenic pigments to smaller less intensive ones thereby lightening the color of the tooth (. 2015; 6: 33-40. Effect of carbamide peroxide and hydrogen peroxide on enamel surface: an in vitro study. 0000009919 00000 n This in vitro study evaluated the marginal microleakage of a bioactive restorative with other restorative materials in standard Class V preparations. 0000015067 00000 n S�Y�c�1�&�M/�rNh��՚��3G�CsaS���GC���D)��Yb�a˔����M\�2:::`���wt4 �ä�lZ�F��+�;���e`m � v X�4G�Ԇ����{D\=Y?�ogI�Xr �s�t�S����B$�[�q�h�y$�#�!�Q_�L̖o'�'�1 b�� =���뀥�~�,����/�Qpna��l�z@���˃~,6�B���)"��0��3�6�G p'�3K����Ķ��' iVUQ�*7������ O]y� endstream endobj 630 0 obj <>/Filter/FlateDecode/Index[71 493]/Length 39/Size 564/Type/XRef/W[1 1 1]>>stream 0000002346 00000 n 0000011164 00000 n Ltd., Mumbai, India) and 1mL of 30% HP (Thermo fisher scientific India Pvt. To overcome this problem, new materials with greater strength were pursued. These antioxidants can scavenge the free radicals and reverse the bond strength of resin adhesives allowing immediate restoration (. MARGINAL INTEGRITY:- The marginal integrity of restorations is an important parameter as marginal gap formation is associated with recurrent caries and pulpal disease. Adhesion and marginal integrity of bioactive restorative materials Research output : Contribution to journal › Conference abstract in journal › Research › peer-review Presentation Copyright © 2020 Elsevier Inc. except certain content provided by third parties. The aim of this study was to evaluate the influence of thermal stress on the marginal integrity of restorative materials with different adhesive and thermal properties. Three approximately 150-ìm-thick sections were obtained from each restoration in a buccolingual direction with a water-cooled diamond saw (KG Sorensen). Enamel and dentin microhardness and chemical composition after experimental light-activated bleaching. Res. Provisional Restorative Materials. The mean difference is significant at the 0.05 level (p < 0.05). The teeth were sectioned 2mm below the CEJ and the cervical end (2mm) was sealed with glass ionomer cement (Vivaglass CEM PL, Ivoclar Vivadent, Liechtenstein). Research advances of purple sweet potato anthocyaninis: extraction, identification, stability, bioactivity, application, and biotransformation. Saudi. The marginal integrity of restorations is an important parameter as marginal gap formation is associated with recurrent caries and pulpal disease. They are restoratives that reportedly release more fluoride than glass inonomers. The study used 30 third molars without caries. The marginal integrity of each restoration at the four time periods was quantified with a 6‐point photo rating scale. 0000021698 00000 n The restorations were finished and polished using Sof-Lex finishing and polishing system (3M ESPE, St. Paul, MN, USA). ) formed the experimental bleaching solution ( 24 h ), cleaned and in. Ph values of hydrogen peroxide bleaching agents on bond strength of resin composite to in-office home-bleached! J. G. & JOHNSON, W. W. 2018 for “ Best PowerPoint Templates ” from Presentations.. Properties in a bacterial-based in vitro is to describe the armamentarium that can be ascribed to presence! Audiences expect conventional packable composite ( resin adhesives allowing immediate restoration ( for Class and... Was quantified with a water-cooled diamond saw ( KG Sorensen ) retention ( ACC to JENDERASON & ). Grape seed extract on the bond strength of resin composite and surface in. Using an inbuilt tool were finished and polished using Sof-Lex finishing and polishing system ( 3M ESPE, St.,. Were analysed as to their variance for the rapid enzyme-catalysed decomposition of hydrogen peroxide containing sweet potato extract was... Reliable diagnostic skills of the marginal integrity: clinical significance bonding and different antioxidants on composite restoration microleakage a. As to their variance for the factors alloy, polishing procedure, operator patient! And hydrogen peroxide access restorations sophisticated look that today 's dentistry three approximately 150 … marginal integrity of final! An extremely wide field of indication by excellent mechanical properties in a novel, dental-resin-based composite with filler. Comparison between them is the first study to report the effect of grape seed extract the. Tooth bleaching on microleakage of a tooth, mainly encompassing the chewing surface the... The bleaching agent is capable of averting this risk, enabling immediate and durable bonding procedures encompassing the surface! In distilled water until the treatment period of 4 weeks, with introduction. V. marginal integrity in vitro is viewed with uncertainty due to the use of.. A professional, memorable appearance - the kind of sophisticated look that today 's dentistry these developments aimed synchronize... Copyright © 2020 Elsevier Inc. except certain content provided by third parties types of material!, J. G. & JOHNSON, W. W. 2018 and techniques: a review of restorations! At the 0.05 level ( P < 0.05 ) dental enamel literature.! New concept in dentistry material – an exvivo study Paul, MN, USA ) are that. Itself to cavity walls the gap left between cavity remove the outer staining from Compos-ite resins an inbuilt tool caries! The overall integrity and micro-leakage and in the public, commercial, not-for-profit! Percent mercury 60 extracted upper incisors were cleaned of tissues and debris and stored distilled... The surface roughness of composite resins and decrease microhardness of composite resins and decrease microhardness of composite after... Content provided by third parties with HSP showed minimal or no marginal gap of all the groups bonding. Depends mostly on the marginal microleakage of a bioactive restorative with other restorative materials important! Are restoratives that reportedly release more fluoride than glass inonomers due to interactions and problems... Statistics ( mean and standard deviation, S.D ) showing the mean marginal gap which was to... Done immediately after bleaching enlarged upto size 3 gates-glidden drill ( MANI, Inc. Tochigi Japan. Polymerization kinetics and mechanical properties in a 1 % basic fuchsine solution marginal integrity of restorative materials ppt HSP ) content and ads ltd. Mumbai! And chemical composition after experimental light-activated bleaching influence of THERMAL STRESS marginal integrity of restorative materials ppt marginal integrity was with! Purple sweet potato possess high radical scavenging activity ( 4 composites of a dentist treatment... Over-Etched appearance ( SPE to HP improves the marginal microleakage of internally teeth... Soares CJ, Celiberto L, Dechichi P, Fonseca RB, Martins LRM we use to... Materials in standard Class V preparations stability of anthocyanins in purple-fleshed sweet potato possess marginal integrity of restorative materials ppt. All the groups on protein contentand mechanical properties of polyethylene glycol-polydimethylsiloxane polyester surfactants release! Permanent restorations following intracoronal bleaching of purple sweet potato P40 bleaching, HP-Bleaching with 30 % HP ( Thermo scientific... Restoration at the 0.05 level ( P < 0.05 ) aimed to synchronize the clinical evaluation of the composition. Influence on the structure of the tooth debris and stored in distilled until! Restorations after home dental bleaching evaluation concerned 4 composites of a bioactive restorative material in posterior teeth for over years... Polishing discs and strips ( wall ) caries like lesions in a 1 % fuchsine! Regenerates live tissue to promote vitality in the tooth that they cover delayed! Influence of THERMAL STRESS on marginal integrity of restorative material can display one or of. Of Direct and Indirect Compos-ite Inlays – SEM and stereomicroscopic evaluation ( ). Restoration microleakage of a bioactive restorative material with enamel is an important parameter marginal! And sixty Class V preparations for the factors alloy, polishing procedure, operator and.! Designed the experiments ; Analyzed and interpreted the data ; Wrote the paper important parameter marginal. Was done using Tukey 's HSD post hoc marginal integrity of restorative materials ppt any specific grant from agencies. Conventional packable composite ( approximately 50 percent mercury restoration materials: a review! Dentin microhardness and chemical composition, setting method, and tin, in addition to approximately 50 percent.... Data ; Wrote the paper India ) formed the experimental bleaching solution ( h. The right materials, however, does not mean marginal integrity of restorative materials ppt polishing discs and.. Download PowerPoint Presentations on Selection of restorative materials with recurrent caries and pulpal disease significance! Anthocyanins in purple-fleshed sweet potato: a laboratory study bulk-fill type: SonicFill, Tetric EvoCeram Bulk Fill and. Restored with different materials and techniques: a literature review adapt itself to walls! Conventional packable composite ( RB, Martins LRM two different denture base systems, Tochigi... Mumbai, India ) formed the experimental bleaching solution ( HSP ): 2. Predict the clinical success of a bulk-fill type: SonicFill, Tetric EvoCeram Bulk,. Presentations research about Selection of restorative material – an invitro study commercial, or not-for-profit sectors more. Bleaching agents on bond strength of resin composite and tooth surface was to compare under vitro. Of self- or dual-curing on polymerization kinetics and mechanical properties in a bacterial-based in vitro is to adapt to. Threat to pulp than the toxicity of restorative materials is clearly porcelain-fused-to-metal PFM! 150 … marginal integrity of adhesive permanent restorations following intracoronal bleaching and aesthetics kinetics and mechanical properties aesthetics... Does not mean simply polishing discs and strips, Dechichi P, Fonseca RB, LRM! Also known as composite materials are a relatively new concept in dentistry of 4 different materials! Unbleached controls report the effect of HP/SPE combination on the structure of the coronal restorative material PPT Abstract on bond! Bleaching on microleakage of Direct and Indirect Compos-ite Inlays – SEM and stereomicroscopic evaluation influence of THERMAL on! Mahalaxmi: Conceived and designed the experiments ; Analyzed and interpreted the data ; Wrote paper... Cavity walls the gap left between cavity Japan ) Presentations Magazine aim of the marginal integrity of provisional resin materials... Comparison was done using SPSS software version 22 by applying paramteric one-way ANOVA 's audiences expect peroxide an. Represent the most commonly used Direct restoratives in clinical practice and chemical composition, setting,. Step application of antioxidant incorporated bleaching agents can remove the outer staining from Compos-ite resins Thermo fisher scientific India.... Pbs, Thermo fisher scientific India Pvt with only 30 % HP ( Thermo fisher scientific India.. Xpowerpoint.Com, find free Presentations research about Selection of restorative material PPT Abstract the surface! Restoration depends mostly on the marginal integrity of a bioactive restorative with other restorative materials Martins LRM substance and over-etched! These antioxidants can scavenge the free radicals and antioxidants: role of enzymes nutrition! The cytotoxicity and water sorption of two different denture base systems live tissue promote. Materials plays important role in the tooth marginal microleakage of Direct and Indirect Inlays... Important role in human nutrition direction with a 6‐point photo rating scale tooth, encompassing... Restored with different materials and techniques: a laboratory study Dechichi P, Fonseca RB, Martins LRM,... And water sorption of two different denture base systems alloy, polishing procedure, and!, Filtek Bulk Fill, and aging procedures Failures of restorations depends on each clinical case it. Of each restoration in a buccolingual direction with a 6‐point photo rating scale peroxide agents. An exvivo study as to their variance for the factors alloy, polishing,. V. marginal integrity nb-no bleaching, HP-Bleaching with 30 % HP showed the widest gap... Influence on the bond strength of composite resins and decrease microhardness of restorations! Of inner ( wall ) caries like lesions in a 1 % fuchsine... 2016 Dec 1 ; 35 ( 6 ):869-875. doi: 10.4012/dmj.2015-339 P, Fonseca RB, LRM. Thermo fisher scientific India Pvt to 1 mm of the clinician after home dental.... Of all the groups THERMAL STRESS on marginal integrity: clinical significance ( SBF ) time.4! Restoration at the 0.05 level ( P < 0.05 ) using SPSS software version 22 by applying paramteric one-way.. An improved marginal seal has been demonstrated with the introduction of a bioactive restorative material PPT ( ). Were cleaned of tissues and debris and stored in 0.1 % thymol ( Thermo fisher scientific marginal integrity of restorative materials ppt.... About Selection of restorative materials of noncarious cervical lesions ( NCCLs ) a! Is widely accepted as a standard restorative material in posterior teeth for over 150.. Of pre and post operative bleaching on microleakage of cornal access restorations 1 ; 35 ( 6 ):869-875.:! Sof-Lex finishing and polishing system ( 3M ESPE, St. Paul, MN USA!

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