20 Apr Diastema closure with Unica anterior matrices – Prof. Dr. Ronaldo Hirata
Diastema closure with Unica anterior matrices
Prof. Dr. Ronaldo Hirata DDS, MS, PhD
Prof. Dr. Ronaldo Hirata DDS, MS, PhD
Prof. Dr. Ronaldo Hirata, DDS, MS, PhD, finished his DDS at the Federal University of Parana in Curitiba, Brazil, before completing a 2-year operative dentistry specialty at the same university. To improve his scientific knowledge, he then finished a master’s degree in dental materials at the Catholic University of Rio Grande do Sul in Porto Alegre, Brazil, with a research thesis working with glass and polyethylene fibers to improve mechanical properties of composites. Following, his PhD in restorative dentistry at the State University of Rio de Janeiro focused on the transmittance, reflectance, and fluorescence of composite resins, Prof Hirata undertook a postdoctoral certificate at New York University (NYU) working with plasma application on dentin surfaces and bonding strength analysis. Now, he is Assistant Professor in the Department of Biomaterials at NYU with a secondary appointment in the Department of Cariology. Prof Hirata has lectured in more than 40 countries and published more than 100 papers in English, Portuguese, and Spanish. Prof Hirata maintains a private practice limited to esthetic dentistry in Curitiba.
clinical case
The patient attended the practice to have an aesthetic modification carried out on the diastema between their central incisors.
The following case study illustrates the direct stratification composite veneering procedure, which uses the Unica anterior matrix from Polydentia.
1: Initial extra-oral pictures of a clinical case with the presence of diastema – front view.
2: Initial extra-oral pictures of a clinical case with the presence of diastema – side view.
3: Initial extra-oral pictures of a clinical case with the presence of diastema – side view.
4: Intraoral pictures of the initial case before the composite cosmetic contour.
5: Intraoral pictures of the initial case before the composite cosmetic contour.
6: Intraoral pictures of the initial case before the composite cosmetic contour.
7: Incisal view of the profile of the initial case and presence of a space between central incisors.
8: Rubber dam installed with individual ties.
9: After sandblasting with aluminum oxide, a phosphoric acid (Ultra-etch/Ultradent) is applied to the enamel surface for 30 seconds.
10: An adhesive (Step 3 of Scotchbond Multi-purpose/3M) is applied to the etched enamel surface.
11: An adhesive (Step 3 of Scotchbond Multi-purpose/3M) is applied to the etched enamel surface.
12: Unica anterior matrix (Polydentia) was installed, allowing the perfect emergence profile of the interproximal surface.
13: The incisal view allows us to see the convexity provided by the anterior matrix.
14: The composite (WE Filtek supreme/3M) is applied first in the interproximal surfaces, providing the correct anatomic contour and facilitating the interproximal contact.
15: The composite (WE Filtek supreme/3M) is applied first in the interproximal surfaces, providing the correct anatomic contour and facilitating the interproximal contact.
16: The interproximal surface and emergence profile of tooth 21 can be seen. The same procedure is done in the tooth 11.
17: Installation of the Unica anterior matrix in the tooth 11.
18: Super-snap polishing system (Shofu) used for finishing and final polishing.
19: Super-snap polishing system (Shofu) used for finishing and final polishing.
20: Super-snap polishing system (Shofu) used for finishing and final polishing.
21: Super-snap polishing system (Shofu) used for finishing and final polishing.
22: Super-snap polishing system (Shofu) used for finishing and final polishing.
23: Final result.
24: Final result.
25: Final result.
26: Final result.
27: Final result.
28: Incisal view of the contour provided by the matrix system.
conclusion
One major challenge that dentists face when performing anterior restorations is achieving the correct shape of the interproximal areas. In cases like diastemas, it can be difficult to ensure the correct form on both sides of the tooth and to maintain balanced proportions.
The Unica system is ideal for dentists who perform direct composite veneering. It’s specifically designed for that purpose. The contoured shape of the Unica anterior matrix allows to proceed simultaneously to the reconstruction of both cervical and interproximal margins with a significant advantage in terms of shape management and predictability of the restoration.
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Unica anterior matrix
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