Bringing Political Upheaval and Cultural Trauma into Order: A Document-Theoretical Approach to the Social Significance of Bibliographic Classification Systems

This paper explores the ability to define bibliographic classification systems as socially significant documents in a way that goes beyond their immediate function in the information retrieval process. It does so in dialog with theory on documents and documentality, and knowledge organization theory. Two examples show how development of new classification systems address social and cultural structures in periods of rapid social and cultural change and crisis. The first example discusses the design of a classification system for Swedish public libraries in the late 1910s, and the second addresses the re-formulation of the Holocaust experience in American Jewish library classification practice in the 1950s and 1960s. Results indicate that social significance to classification systems influence the definition their institutional context in relation to wider social issues and movements. The character of this influence suggests research on documentality needs to address the relation between form and content in documents defined as reifications of social acts.

Zygomatic Implants Placed in Immediate Function through Extra-Maxillary Surgical Technique and 45 to 60 Degrees Angulated Abutments for Full-Arch Rehabilitation of Extremely Atrophic Maxillae: Short-Term Outcome of a Retrospective Cohort

The use of new devices for the rehabilitation of the severely atrophic maxillae needs validation. We aimed to report the short-term outcome of severely atrophic jaws rehabilitated with zygomatic implants with no implant head angulation placed extramaxillary in conjunction with standard implants. Forty-four patients were consecutively included with 77 zygomatic implants (31 abutments of 45 degrees and 46 abutments of 60 degrees) and 115 standard implants. Outcome measures were prosthetic survival, implant/abutment success, complications, modified plaque index (mPLI), modified bleeding index (mBI), mucosal seal efficacy evaluation (MSEE) >4 mm, and Zygomatic implants classification level (ZICL). Two patients (4.5%) were lost to follow-up. No prosthesis was lost; one patient lost one zygomatic implant; two angulated abutments of 60 degrees needed to be replaced in one patient due to an aesthetic complaint; rendering a cumulative success rate at 2-years of 95.3% and 95.9% using patient and implant/abutment as unit of analysis, respectively. Mechanical and biological complications occurred in 13 and six patients, respectively; all resolved. The median mPLI and mBI was 1; MSEE > 4 mm occurred in 17% and 21% of patients at 1- and 2-years, respectively; ZICL1 was registered in 80% of patients. The current protocol enabled good short-term outcomes.

A fixed reconstruction of fully edentulous patients with immediate function using an apically tapered implant design: a retrospective clinical study

Background Immediate function has become an accepted treatment modality for fixed restorations in completely edentulous jaws. It is known that implant microtopography (surface) may enhance osseointegration, while implant macrotopography (macrodesign) plays an important role in primary stability in the patient requiring an immediate loading. The aim of this retrospective study was to evaluate the clinical and radiographic outcomes of the edentulous subjects treated with narrow and/or regular diameter, which placed and loaded immediately. Methods Forty-two consecutive patients received 171 implants, including regular and narrow diameter implants (NDIs). Each jaw, 19 mandibles and 24 maxillae, was treated with a fixed-full arch prosthesis according to the Straumann® Pro Arch concept. The majority (95%) of the restorations were supported by four implants, of which the posterior two implants were tilted. A provisional functional acrylic prosthesis was delivered on the day of surgery. All patients were followed up to 55 months. Cumulative survival rate was determined using Kaplan-Meier analysis. Radiological measurement of marginal bone level was performed. Results The overall follow-up time for survival rate was up to 55 months. Four implants (3 implants in maxilla, 1 implant in mandible) were lost, resulting in an overall cumulative implant survival rate of 97.7%. Implant survival rate in the axial and tilted implants was not statistically significant. The mean of interproximal marginal bone loss was 0.15 mm after 24 months. Good soft tissue health was observed in almost 99% of patients. The final prosthesis survival rate was 100%. Conclusions The results of this retrospective pilot study indicated that total edentulous patients requiring an immediate implant placement and loading can be successfully treated with this implant design. The improved mechanical properties of these implants might give a more conservative treatment option for the jaws showing a severe horizontal alveolar bone resorption.

Artificially innervated self-healing foams as synthetic piezo-impedance sensor skins

Human skin is a self-healing mechanosensory system that detects various mechanical contact forces efficiently through three-dimensional innervations. Here, we propose a biomimetic artificially innervated foam by embedding three-dimensional electrodes within a new low-modulus self-healing foam material. The foam material is synthesized from a one-step self-foaming process. By tuning the concentration of conductive metal particles in the foam at near-percolation, we demonstrate that it can operate as a piezo-impedance sensor in both piezoresistive and piezocapacitive sensing modes without the need for an encapsulation layer. The sensor is sensitive to an object’s contact force directions as well as to human proximity. Moreover, the foam material self-heals autonomously with immediate function restoration despite mechanical damage. It further recovers from mechanical bifurcations with gentle heating (70 °C). We anticipate that this material will be useful as damage robust human-machine interfaces.

Immediate function with four zygomatic implants in patients with extreme maxillary atrophy - Case series

Purpose: Zygomatic implants have been in use since the 1990’s for the treatment of patients with severely resorbed maxillae. Eliminating grafting combined with immediate function increases patient acceptance. The purpose of this study was to evaluate a protocol for immediate function with fixed prostheses for patients with extreme maxillary atrophy, treated with four zygomatic implants (S.I.N.-Implant System, São Paulo, Brazil). Case report: This retrospective clinical study included 10 patients with 40 immediately loaded zygomatic implants with fixed provisional acrylic prosthesis attached 5 to 6 hours after surgery. The patients’ follow-up was from 12 to 60 months. Two zygomatic implants failed (implant survival rate 95%). There were no complications such as sinusitis, hygiene maintenance or speech impairment. The results support the hypothesis that immediate function with four zygomatic implants is a viable concept. The clinical success for these patients was enhanced by the shorter time span of the treatment process and the immediate rehabilitation in a comfortable manner as compared to grafting based procedures. Conclusion: The high survival rate, the increase of patients demand in immediate functional ability and the less morbidity following the surgical procedure renders this immediate function zygomatic procedure a viable treatment option of the resorbed fully edentulous maxillae.

Immediate function with four Zygomatic implants in patients with extreme maxillary atrophy – Case Series

Purpose: Zygomatic implants have been in use since the 1990’s for the treatment of patients with severely resorbed maxillae. Eliminating grafting combined with immediate function increases patient acceptance. The purpose of this study was to evaluate a protocol for immediate function with fixed prostheses for patients with extreme maxillary atrophy, treated with four zygomatic implants (S.I.N.-Implant System, São Paulo, Brazil). Case series:This retrospective clinical study included 10 patients with 40 immediately loaded zygomatic implants with fixed provisional acrylic prosthesis attached 5 to 6 hours after surgery.The patients’ follow-up was from 12 to 60 months. Two zygomatic implantsfailed (implant survival rate 95%). There were no complications such as sinusitis,hygiene maintenance or speech impairment.The results support the hypothesis that immediate function with four zygomatic implants is a viable concept. The clinical success for these patients was enhanced by the shorter time span of the treatment process and the immediate rehabilitation in a comfortable manner as compared to grafting based procedures. Conclusions: The high survival rate, the increase of patients’ demand in immediate functional ability and the less morbidity following the surgical procedure renders this immediate function zygomatic procedure a viable treatment option of the resorbed fully edentulous maxillae.