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4 INDUSTRY Dental Tribune Middle East & Africa Edition | 1/2018 Following a simpler path from prep to crown By Dr Carlos Eduardo Sabrosa, Brazil Indirect restorative procedures can be time-consuming and complicated: many different processes from impression taking to cementation are carried out in the dental office, and in each of them, different strategies may lead to success. However, some of the available materials and techniques will involve a lot of effort, while others enable users to proceed quickly and simplify the complete procedure. A simplified workflow from prep to crown that really makes life easier for the dental practitioner is described below. Fig. 1: Initial situation. The failed composite restora- tion covering a large part of the left mandibular first molar’s occlusal surface needs to be replaced. Fig. 2: Due to the size of the restoration, the amount of remaining tooth structure might not be sufficient to ensure the required stability for a direct composite restoration. Fig. 3: Upon removal of the old filling, it becomes clear that a crown is needed to ensure the required stability. The tooth is built up with 3M™ Filtek™ Bulk Fill Posterior Restorative, which may be placed in con- junction with 3M™ Single Bond Universal Adhesive and in increments of up to 5 mm. Fig. 4: Following tooth preparation, a temporary crown is produced chairside with 3M™ Protemp™ 4 Temporization Material. This material exhibits a high strength and a natural gloss without polishing. Fig. 5: One week after the preparation procedure, healthy soft tissue conditions are obtained. They lay the foundation for a high-quality precision impres- sion. Fig. 6: In order to allow for a detailed capture of the preparation margin, the gingival tissues are retracted using the double-cord technique. Alternatively, a sin- gle cord may be applied in combination with 3M™ Astringent Retraction Paste. Fig. 7: Monophase impression taken with 3M™ Im- pregum™ Penta™ Soft Polyether Impression Mate- rial. A very detailed representation of the preparation margin is obtained with this simple technique. Fig. 8: Situation at intraoral try-in of the crown. It is made of a 3M™ Lava™ Zirconia coping and an IPS e.max® Ceram (Ivoclar Vivadent) porcelain layer. Ideal intraoral conditions (smooth margins, healthy tis- sues) are visible. Fig. 9: Sandblasting of the crown’s intaglio surface to create a microretentive surface structure that is beneficial for cementation. This procedure is recom- mended for oxide ceramic materials. Fig. 10: Application of self-adhesive resin cement* into the crown. This proven product offers a simpli- fied procedure since it eliminates the need for sepa- rate etching, priming and bonding. Fig. 11: Situation after crown placement, removal of the excess cement and thorough cleaning. The crown blends in nicely with the surrounding tooth structure. Fig. 12: At the check-up several days after crown placement, a great overall picture is obtained. The patient is happy with the final restoration in terms of aesthetics and function. Comments The described patient case shows that it is possible to significantly reduce the number of working steps in an indirect restorative procedure. In this way, potential sources of error are eliminated and chair-time is decreased. Key to success is the use of innovative, high-quality materials that offer ease of use and lead to increased efficiency in the dental office. These include the above-men- tioned monophase impression material, the bulk fill composite, the temporization material that does not require polishing and the self-adhesive resin cement all offered by a single manufacturer. *Relyx™ U200 self-adhesive resin cement in the MEA Region Dr Carlos Eduardo Sabrosa, Rio de Janeiro, Brazil Dr. Sabrosa is an Associate Professor at the State University of Rio de Janeiro Dental School. He received his DDS in 1992 from the State University of Rio de Janeiro Dental School and the Clinical Advanced Graduate Studies (CAGS) in Prosthodontics from Boston University Goldman School of Dental Medicine in 1996. He earned the Steven Gordon Research/ Clinical Award in 1995 and 1996 and the Tylman Research Grant Award in 1993 from the American College of Prosthodontics. Dr. Sabrosa also received his MSD and DScD in Prosthodontics/Biomaterials from Boston University Goldman School of Dental Medicine in 1997 and 1999 consecutively. He has a private practice, focused in Oral Rehabilitation and Implantology, in Leblon, Rio de Janeiro, Brazil. 3M Oral Care at SDS By 3M 3M Oral Care participated in the Sau- di International Dental Conference from 9-11 Jan 2017 held at the Riyadh International Convention and Exhi- bition Center. 3M’s presence at the Conference & Exhibition was through a specially designed booth with designated ar- eas for customer hospitality, product displays and 3D holograms. It was the first time that the “Vir- tual Reality Experience“ was intro- duced in any Dental Conference in the Kingdom. The experience took the customer inside a virtual Oral Cavity where he could see a Class II restorative procedure being done us- ing 3M™ Filtek™ Bulk Fill Posterior Restorative, Single Bond Universal Adhesive and Sof-Lex™ Diamond Polishing system. 3M Oral Care displayed the complete range of products which is loved by millions of customers worldwide. These specifically included products such as Filtek™ Z350 XT Universal Restorative, Filtek™ Bulk Fill Poste- rior, Ketac™ Molar Glassionomer, Relyx™ U200 Self-Adhesive Cement, Relyx™ Fiber Post 3D, Clarity™ Ad- vanced brackets, and APC™ Flash Free systems to name a few. 3M core products like Single Bond Universal, Relyx™ Cement portfo- lio, Penta™ Impression portfolio, Temporization portfolio including Protemp™ 4, Stainless Steel Crowns, Pedo Strip Crowns and the Ortho- dontic portfolio including Victory™ Series Brackets, TADS and Incog- nito™ were also on display at the booth. 3M also invited renowned speaker Dr. Federico Ferraris from Italy to give a lecture and workshop during the SIDC. The lecture, titled ‘Compos- ite vs Ceramic’ attracted a large num- ber of visitors during the conference. The workshop was conducted on the premises of King Saud University and was attended by 28 eager learn- ers. 3M Saudi Arabia Zone C2, Bldg. 24-25 Business Gate, Airport Road Riyadh 11485 Kingdom of Saudi Arabia Tel: +966 1 4650052