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Purpose: The aim of this study was to analyze retrospectively the clinical reliability of complete-arch rehabilitations with screw-retained fixed prostheses supported by four dental implants inserted with a fully guided surgical protocol. Materials and Methods: All the implants were placed between December 1, 2015, and April 30, 2019. Digital implant surgical planning was performed for all the complete-arch rehabilitations, and then, fully guided surgery was performed. The fixed provisional prostheses were delivered the day of the surgery and replaced by definitive prostheses after the healing period. Patients were followed up to determine survival of the implants and success of the overall treatment. Results: A total of 160 implants were positioned in 37 patients, with three patients receiving rehabilitations in both arches. A total of 40 complete-arch rehabilitations were performed, 26 in the maxilla and 14 in the mandible. Only five implants failed, resulting in an overall implant survival rate of 96.9%. No definitive prostheses failed, resulting in a 100% prosthetic success rate. The failed implants were successfully replaced before definitive prostheses were made, resulting in an overall treatment success of 100%. Conclusion: Within the limitations of this study, digital planning and guided surgery to perform complete-arch rehabilitations on four dental implants seems to be a valid treatment option. However, several prospective studies with longer follow-up are needed to achieve more predictable results. [ABSTRACT FROM AUTHOR]

Purpose: This study aimed to assess the survival rate, marginal bone levels, and prosthetic success of short implants when placed in posterior areas of severely reabsorbed mandibles. Materials and Methods: A systematic review was performed of all randomized controlled trials with at least 10 patients with a control group where bone augmentations were performed that were published between January 2015 and February 2020. From 77 pertinent studies, 14 full-text publications were studied, and 6 studies fulfilled the inclusion criteria. Results: The implant survival rates of short dental implants ranged from 92% to 96.9% with a follow-up from 1 to 5 years, and the prosthetic success rate ranged from 90% to 100% during the same follow-up. The mean marginal bone level values of involved short implants ranged from -0.51 to -2.30 mm. Conclusion: The obtained data showed that short dental implants are a valid therapeutic choice to rehabilitate severe mandibular atrophy in the medium to long term. [ABSTRACT FROM AUTHOR]

Purpose: The objective of this study is to examine current business and management research on "Industry 4.0 base technologies" and "business models" to shed light on this vast literature and to point out future research agenda. Design/methodology/approach: The authors conducted a bibliometric analysis of scientific publications based on 482 documents collected from the Scopus database and a co-citation analysis to provide an overview of business model studies related to Industry 4.0 base technologies. After that a qualitative analysis of the articles was also conducted to identify research trends and trajectories. Findings: The results reveal the existence of five research themes: smart products (cluster 1); business model innovation (cluster 2); technological platforms (cluster 3); value creation and appropriation (cluster 4); and digital business models (cluster 5). A qualitative analysis of the articles was also conducted to identify research trends and trajectories. Research limitations/implications: First, the dataset was collected through Scopus. The authors are aware that other databases, such as Web of Science, can be used to deepen the focus of quantitative bibliometric analysis. Second, the authors based this analysis on the Industry 4.0 base technologies identified by Frank et al. (2019). The authors recognize that Industry 4.0 comprises other technologies beyond IoT, cloud computing, big data and analytics. Practical implications: Drawing on these analyses, the authors submit a useful baseline for developing Industry 4.0 base technologies and considering their implications for business models. Originality/value: In this paper, the authors focus their attention on the relationship between technologies underlying the fourth industrial revolution, identified by Frank et al. (2019), and the business model, with a particular focus on the developments that have occurred over the last decade and the authors performed a bibliometric analysis to consider all the burgeoning literature on the topic. [ABSTRACT FROM AUTHOR]

Purpose: This study aims to combine open innovation (OI) and organizational learning (OL) literature in the context of strategic alliances. Design/methodology/approach: The authors develop a conceptual framework that links OI to OL literatures. The authors empirically validate this framework through four representative cases of dyadic strategic alliances in which the allied partners have (mainly) adopted an inbound or outbound OI strategy and (mainly) used an experiential or experimental learning approach to access knowledge in the alliance. Findings: The authors propose and validate a framework that links two well-known OI strategies (inbound and outbound) and two types of OL, namely, experiential and experimental learning. This, in turn, allows us to propose four different typologies of learning opportunities that could be pursued by alliance partners. Research limitations/implications: The research offers a framework that links experiential and experimental learning to inbound and outbound OI strategies. However, the authors focused on inbound and outbound OI. The authors are aware that sometimes coupled innovation could take place in alliances. Practical implications: This study proposes best practices for companies willing to open their innovation processes with alliance partners by bearing in mind the learning outcomes that may be exploited through the alliance. Originality/value: This study highlights four alliance archetypes emerging from the nexus between OI strategies to OL methods. [ABSTRACT FROM AUTHOR]