Background After a single tooth extraction, remodelling processes are initiated and morphological changes occur in the alveolar bone. It has been suggested that implant placement in a fresh extraction socket may partly reduce the alveolar ridge contraction and that several factors like the thickness of the buccal bone wall and the size of the gap between the implant and the facial bone wall may play a role on peri‐implant tissues dimensional alterations. Methods Twenty‐six patients treated with single‐tooth maxillary implants were included in this study. A CBCT exam allowed to access the initial buccal bone thickness (BT). Digital impressions were taken prior to extractions (T0), 1 month (T1), 4 months (T2), and 12 months (T3) after implant insertion and superimposed with a computer software allowing to quantitatively analyse the three‐dimensional changes occurred in the adjacent tissues. Variables related to thickness and volume were computed. Results Participants with BT ≤ 1 mm exhibited a significantly increased buccal peri‐implant tissue thickness change than patients with BT > 1 mm (P = 0.049). At T3 patients representing BT ≤ 1 mm exhibited a total volume change of −8.53% ± 5.47% compared with patients presenting BT > 1 mm, −4.37% ± 2.08%. No statistical significance was found on the distance between implant shoulder and the buccal bone plate (BID) effect. Conclusion After the first year of treatment peri‐implant tissues showed continuous changes resulting in a higher thickness and volume reduction at thin buccal bone plates.

The use of acrylic resins as a definitive material has shown some advantages comparing to other definitive materials. However, their poor mechanical properties remain a major drawback. In this case report, graphene oxide (GO) was incorporated into polymethyl methacrylate (PMMA) resin for a definitive maxillary rehabilitation, combined with an intraoral digital impression and a three-dimensional facial scan. After 8 months of the placement of the definitive prosthesis, no mechanical, aesthetic, or biologic complications were reported, and the soft tissues showed excellent health and stability. The incorporation of GO in PMMA resins seems to be a suitable option for prosthetic rehabilitation. However, further studies are needed to ensure rigorous scientific support of these techniques and materials. Key words: Computer-aided design, computer-aided manufacturing, dental impression technique, dental prosthesis; graphene oxide.

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In the last two decades, zirconia-based restorations have been increasingly used in Dentistry. Patients tend to choose metal-free restorations, preferring materials with similar properties to the natural teeth and similar characteristics of light scattering, achieving good esthetic results [1]. Polycrystalline ceramics, in which zirconia stands out, are ceramics that do not have glassy components, with a dense and cohesive structure that are very difficult to break and fracture [2]. Given those characteristics, Garvie et al. (1975)[3] entitled zirconia as "ceramic steel". Then, considering that zirconia is the dental ceramic material with the highest strength, it can be used as monolithic material, presenting notable advantages mainly related to the non-occurrence of chipping off a veneering ceramic and its numerous indications of use in single, partial, and full-mouth rehabilitation. Also, it presents high biocompatibility, less wear of the antagonist, easiness to polish, high hardness, low thermal conductivity, and chemical stability [4].The emergence of these new materials like monolithic zirconia (MZ) combined with digital technology allows increasingly biomimetic results. In vitro studies showed superior performance and results regarding mechanical strength of MZ[5,6], allowing its use mainly for cases with unfavorable occlusion, parafunctional habits, previous fractures, and limited space for restorative materials [7].However, clinical evidence of the existing literature on clinical performance and durability of this type of restorations is still scarce. There is a lack of clinical studies with a follow-up longer than five years,