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• W3113485198 abstract "INTRODUCTION:Interim prosthesis are an essential part of fixed prosthodontic treatment. Patients must be provided with an restoration from initial tooth preparation until the definitive prosthesis is placed. An prosthesis is defined as fixed or removable prosthesis, designed to enhance aesthetics, stabilization or function for a limited period of time, after which it is to be replaced by a definitive Often such prostheses are used to assist in determination of the therapeutic effectiveness of a specific treatment plan or the form and function of the planned definitive prosthesis. The term provisional prosthesis is often used as a synonym for interim The requirements of an restoration are essentially the same as for the definitive restoration, with the exception of durability and shade. The main aims of prostheses are to protect pulp and sedate prepared abutments, evaluate parallelism of abutments, and immediately replace missing teeth. It also helps to prevent migration of abutments, improve aesthetics, provide an environment conducive to periodontal health, evaluate and reinforce the patient’s oral home care. Interim prosthesis provide a matrix for the retention of periodontal surgical dressings; stabilize mobile teeth during periodontal therapy and subsequent repair. In case of ongoing orthodontic treatment, to anchor orthodontic brackets during minor tooth movement and to aid in developing and evaluating an occlusal scheme before the final prosthesis is made. Finally, this prosthesis allow evaluation of vertical dimension, phonetics, and masticatory function. Cement is a binding element or agent used as a substance to make objects adhere to each other, or something serving to firmly unite. A material that, on hardening, will fill a space or bind adjacent objects. Cementation is the process of a attaching parts by means of cement: attaching a restoration to natural teeth by means of a cement. Luting agents are used to ensure the stability of fixed prosthesis throughout their serviceable lifespan. They can be luting agents or definitive luting agents. Cementing a restoration on an basis is advised so that the patient and dentist can assess its appearance and function over a time longer than during a single visit. Interim cement is mixed with a little petrolatum to avoid the difficulty in removing the restoration. An cemented restoration may become loose during function. If recementation is of the dislodged restoration is not done promptly, caries can develop very rapidly. Interim cementation should not be undertaken unless the patient is given clear instructions about the objectives of the procedure, the intended duration of trial cementation and the importance of returning promptly if an abutment loosens. Studies have shown that cement application may affect the shear bond strength of definitive restoration luted with resin cement. A durable bond depends on the chemical composition of the adhesive agent and the surfaces that are connected. The present study is aimed to determine the most favourable cement for resin luting cement based on analysing their shear bond strength values. AIMS AND OBJECTIVES:The purpose of the present study is to estimate the most favourable cement for resin luting cement based on the obtained shear bond strength values. The study is also aimed at determining & comparing the shear bond strength values: • After zinc oxide Eugenol cement application on dentin. • After Eugenol free cement application on dentin. • After resin based cement application on dentin. METHODOLOGY: The roots of 60 sound, recently extracted (up to 7 days) human maxillary first premolar teeth were embedded in acrylic resin blocks up to the cemento enamel junction. Their occlusal surfaces were abraded with silicon carbide paper (180 to 600 grit) in a polishing machine until a flat dentin surface was exposed. The smear layer formed was expected to be uniform for all teeth. Three different types of cements to be used. A conventional Zinc Oxide Eugenol cement, Eugenol free cement and a resin based cement. After cement application on dentin surface, samples received an restoration fabricated from an autopolymerising acrylic resin (9×9×5 mm) simulating an restoration. These restorations and remaining cement were removed after 1 week, using a dental excavator, and the preparation was cleaned. For definitive cementation, Zirconia blocks were bonded with the respective resin cement to the occlusal surface of the premolars after the described procedures. The Zirconia blocks were airborne-particle abraded with 50-μm aluminum oxide particles for 10 seconds at a distance of 20 mm, cleaned in an ultrasonic bath for 5 minutes, and air-dried. The respective resin cement was applied and the resin block was seated on the treated dentin under finger pressure. Excess material was removed and the cement light activated for 40 seconds. Permanent cemented specimens were allowed to dry for 30 min before they were stored in 100% humidity for 24 h at room temperature. The bond strengths of the respective groups were then tested, 24 h after definitive cementation, using the universal testing machine with a crosshead speed of 0.5 mm/min until failure. RESULT:a) For Group I (Control Group), the mean maximum load applied is 171 N and the mean shear bond strength obtained is 5.0 MPa. b) For Group II (Zinc Oxide Eugenol Interim cement applied on samples), the mean maximum load applied is 30 N and the mean shear bond strength obtained is 0.68 MPa. c) For Group III (Eugenol free cement applied on samples), the mean maximum load applied is 50 N and the mean shear bond strength obtained is 1Mpa. d) For Group IV ( Resin based cement applied on samples), the mean maximum load applied is 91 N and the mean shear bond strength obtained is 2 MPa Group I, Control group has the highest Shear bond strength value compared to all other groups. CONCLUSION:The results of the present study shows that the newer resin based cement showed better values than the Zinc oxide eugenol and eugenol free cements. The use of cement clearly affects the bonding of resin cement to dentin.• Group IV (Resin based cement) samples showed better bond strength compared to remaining two cements. • Group III (Non eugenol cement) samples showed better result than Group II (Zinc oxide eugenol cement) samples. • By using proper cement, the long-term durability of the definitive prosthesis can be achieved." @default.
• W3113485198 created "2021-01-05" @default.
• W3113485198 creator A5029274259 @default.
• W3113485198 date "2019-01-01" @default.
• W3113485198 modified "2023-09-27" @default.
• W3113485198 title "Effect of Different Types of Interim Cements on Shear Bond Strength of Zirconia Blocks Luted with Resin Cement on Dentin Surface: An In Vitro Study" @default.
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