Histomorphometry of Bone after Intentionally Exposed Non-Resorbable d-PTFE Membrane or Guided Bone Regeneration for the Treatment of Post-Extractive Alveolar Bone Defects with Implant-Supported Restorations: A Pilot Randomized Controlled Trial.

Aim: The aim of the present study was to investigate quantitative histological examination of bone reconstructed with non-resorbable high-density polytetrafluoroethylene membrane (d-PTFE), left intentionally exposed in post extraction sockets grafted with anorganic bone material, and removed after four weeks, versus extraction and guided bone regeneration (GBR), performed two months later. Materials and Methods: This study was designed as a multicenter randomized controlled trial of parallel-group design. Patients were selected and consecutively treated in three centers in Italy. Patients randomly received intentionally exposed non-resorbable d-PTFE membrane (group A), or guided bone regeneration (group B), to treat post-extractive alveolar bone defects with implant-supported restorations. Outcomes were: the implant failure, any mechanical and biological complications, patient satisfaction, and qualitative and histomorphometric evaluation of the collected bone samples. Results: Eighteen patients were consecutively enrolled in the trial. Of these, six out of 18 patients were male. All the included patients were treated according to the allocated interventions, and no drop out occurred. No implant failure and no complications were experienced, and all the patients were fully satisfied with the function and aesthetic of their implant-supported restoration, without difference between groups. Morphological analysis revealed no sign of tissue reaction, such as fibrosis or necrosis. Regenerated bone was well mineralized in both groups, but it seemed more mature in group B than in group A. Three samples showed a minimal number of lymphocytes. Several blood vessels of small size occupied the medullary spaces, where the tissue resulted in more maturity, indicating the activity of the tissue in progress. The histomorphometric evaluation showed no statistically significant differences in the tissue volume fractions between the two groups of patients. Conclusions: With the limitation of the present study, buccal plate reconstruction with an intentionally exposed non-resorbable membrane is an effective and easy procedure for regenerating a resorbed buccal bone plate, reducing the need for guided bone regeneration

Exploring Online Community College Course Completion and a Sense of School Community

Researchers have found low online course completion rates to be a complex problem in higher education. Meanwhile, theory on adult learners\u27 online persistence highlights the importance of a sense of school community. At the small, rural focus community college (FCC) for this study, general education online course completion rates are lower than the national average. FCC has not addressed the low online course completion rates. Using Rovais\u27 composite persistence model as the conceptual framework, this instrumental case study examined how students\u27 experiences and perceptions of a sense of school community contribute to their ability to complete online general education courses. Semistructured interview data were gathered with a purposeful, criterion-based, sample of 9 adult online students taking online general education courses. The inductive data analysis utilized case and cross-case analysis, marking, cutting, and sorting of text until 4 themes emerged: interaction, sense of belonging, support, and educational values. The results led to a white paper recommending an orientation and community space, asynchronous video technology, and an online curriculum instructional designer. This study contributes to positive social change by providing FCC with program and policy change recommendations that support the colleges\u27 goals of increasing access and success. Increased educational access and success for the local adult population creates informed citizens, contributes to economic growth, and provides a higher quality of life for the community

3D survey and advanced modeling in the study of the Forts of Rome: the Forte Monte Antenne

[EN] In the studies the authors are conducting on the entrenched camp of Rome, 3D surveys and digital models are used as means to understand constructions with the aim of developing restoration and reutilization projects. For Forte Monte Antenne (1882-1891), the authors have carried out systematic studies of the formal and structural aspects. The data acquired from a direct survey and with laser scanner, drone and photogrammetry, integrated with data obtained from iconographic and bibliographic sources, were integrated in the creation of a digital model, which made the classification of the various elements in a structured database possible, including the verification of the relationship among the parts at varying levels, and the system of aeration ducts. Convective motions and the thermo-hygrometric and visual comfort within some of the environments, as well as thermographic surveys of the walls were conducted. The BIM model was integrated, therefore, with a MEP model. The hypothesis of restoration and possible adaptation to new functions cannot disregard the analysis of those parameters which complete the picture of environmental quality and thus of the effective potentials in repurposing of the structure.Spadafora, G.; Bellingeri, G.; Canciani, M.; Pallottino, E.; Ferretti, S.; Antonucci, E.; Dolfini, R. (2020). Rilievo 3D e modellazione avanzata nello studio dei Forti di Roma: il Forte Monte Antenne. Editorial Universitat Politècnica de València. 463-470. https://doi.org/10.4995/FORTMED2020.2020.11424OCS46347

Il disegno della cupola del San Carlino alle Quattro Fontane di Borromini: ovale canonico?

The oval that characterizes the dome of the church of San Carlino, designed by Francesco Castelli, called Borromini, is a subject that has always attracted the interest of many scholars. Many design drawings describe a geometric trace of a polycentric curve, or an oval, with a complex plot of lines, some needed to geometrical construction and correspondence with architectural drawing, others of uncertain interpretation. This study aims to investigate the actual role which has the oval shape in the project of San Carlino by comparing the design drawings and the detailed study of the model derived from the survey. In particular this study analyze the sections of the elements where the shape of the oval is present: the tiburium, the coffered dome, the lantern

Analisi di rilievo e progetto urbano

Il volume descrive il progetto Ostiense-Marconi, riguardo la sistemazione degli insediamenti dell'Università di RomaTre nei quartieri Ostiense, Marconi, Papareschi e San Paolo a Roma, che è stato sviluppato tra il 2000 e il 2001 da un gruppo di progettisti, docenti e studenti della Facoltà di Architettura, coordinati dal prof. F. Cellini. Il progetto, basato su alcuni principi direttori, a fondamento dell’impianto urbanistico generale, si è poi sviluppato secondo proposte specifiche, relative ad alcuni temi-obiettivo e alle cinque sub-aree degli ambiti urbani più ristretti. Il testo, seguendo l'impostazione del progetto, è stato sviluppato in: una parte introduttiva, in cui è descritto il progetto urbano generale e la relazione con i progetti precedenti; una prima parte, con l’analisi dello sviluppo storico del quartiere, una seconda, con l’analisi di rilievo e del progetto urbano generale e lo sviluppo dei temi specifici (le infrastrutture viarie, la riorganizzazione di via Ostiense, il parco Fluviale); una terza parte con l’analisi delle sub-aree (Gasometro, Mercati Generali, Argonauta, Papareschi e Valco San Paolo); un’appendice con la cartografia storica, la cronologia e la bibliografia. Tutti i capitoli presentano alcune schede storiche, i documenti di rilievo e di analisi riferiti sia alle aree che ai singoli edifici, i modelli 3d di rilievo, ai quali corrispondono gli specifici elaborati e modelli 3d di progetto. Il saggio da me redatto si riferisce al 3° capitolo, relativo all’Analisi di rilievo e progetto urbano, in cui sono descritte le diverse procedure relative al rilievo urbano, che hanno costituito la base per l’aggiornamento della cartografia di riferimento e il supporto dimensionale per la definizione di un modello 3d generale e nel dettaglio dei singoli edifici, sia per quanto riguarda lo stato di fatto, desunto dal rilievo, sia per quanto riguarda le varie ipotesi di progetto. Per questo lavoro sono state sperimentate delle procedure specifiche di rilevamento, di misurazioni aerofotogrammetriche e di modellazione 3d, finalizzate alla diretta connessione tra rilievo e progetto, in modo da poter controllare, in ogni fase, l’intero processo progettuale, dal particolare al generale e viceversa.