Orthognathic Surgery with Interdisciplinary Digital Planning in Patients with Geroderma Osteodysplasticum: A Case Report

Patients with geroderma osteodysplasticum (GO) often times have dentofacial deformities and benefit from orthognathic surgery. Because of generalized osteopenia, operations must be prepared even more meticulously than usual, and the higher risk of unfortunate fractures (bad splits) should be explained to the patients in detail. This case report is intended to portray a digital, interdisciplinary and patient-individualized planning of orthognathic surgery. It points out the individual steps that must be considered and how they can be advantageously used in patients with underlying diseases or syndromes such as GO. Through a careful digital representation of the surgical options, production of the digitally modeled splints, 3D printing and good manual surgical implementation, the quality of life of patients with GO can be increased through orthognathic surgery. Both the functions in the oral, maxillofacial region and the patient's appearance in the case presented here benefited from the interdisciplinary, individualized and digital treatment approach.

Influencing factors on knowledge sharing in virtual teams

BACKGROUND: The importance of virtual work is growing. Especially in knowledge-intensive, dynamic and international sectors, virtual teams have become an ubiquitous work form, promising more flexibility and higher performance. To solve complex problems they have to share and assimilate knowledge, but it is difficult in virtual contexts to overcome social distance and to avoid communication issues. Knowledge sharing in virtual teams may be more prone to errors and take more time. OBJECTIVE: Current studies mainly consider a one-sided perspective, either focusing on technical or human influencing factors for effective knowledge sharing in virtual teams, but not on the interaction between these. This study addresses that gap by exploring success-critical factors for knowledge sharing by using the socio-technical systems-approach. METHODS: The database of the study consists of 26 in-depth interviews. The interviews were partially structured and based on the Critical Incident Technique. Using a deductive categorization scheme consisting of four main categories and 21 subcategories, the frequencies and overlaps of influencing factors on successful knowledge sharing in virtual teams were examined. RESULTS: Each critical incident reported included factors from all four main categories (technology, structure, people and task) with specific frequencies and connections. Structural influencing factors as well as technological factors are mentioned particularly frequently together. CONCLUSION: The results of the study underline the importance of an integrated socio-technical view on knowledge sharing in virtual teams. Technical and social factors need to be considered simultaneously. The findings can be used for designing and optimizing knowledge sharing processes in virtual teams.

[Successful knowledge exchange in virtual teams-how important is social presence?]

Erfolgreicher Wissensaustausch ist ein zentraler Prozess für den Erfolg virtueller Teams. Damit gehen spezifische Herausforderungen einher. Die verwendete Informations- und Kommunikationstechnologien, die räumliche Trennung und der mangelnde persönliche Kontakt der Teammitglieder erschweren den Austausch von Wissen.

Die Forschung zu Einflussfaktoren auf Wissensaustausch in virtuellen Umgebungen fokussiert zumeist rein technische oder soziale Faktoren. Dagegen kaum beachtet ist die Rolle der sozialen Präsenz als interdisziplinäres Konstrukt. Soziale Präsenz meint das subjektive Erleben eines Zusammengehörigkeitsgefühls trotz physischer Distanz, das in der Interaktion zwischen den Nutzern und der vorhandenen Technologie entsteht.

Die vorliegende Studie untersuchte, inwieweit das Erleben sozialer Präsenz den Erfolg virtuellen Wissensaustausches beeinflusst. Basierend auf der Critical Incident Technique wurden 26 Interviews mit Mitgliedern virtueller Teams geführt. Die Teilnehmenden schilderten Situationen, in denen der virtuelle Wissensaustausch erfolgreich oder nicht erfolgreich war.

Die Auswertung zeigt, dass soziale Präsenz häufiger in erfolgreichen Situationen auftrat. Das weist darauf hin, dass deren Erleben wichtig für erfolgreichen Wissensaustausch ist.

Praktische Relevanz: Soziale Präsenz kann durch Medienreichhaltigkeit, Unterstützung sozialer Prozesse und Beziehungen in virtuellen Teams positiv beeinflusst werden. Aus den Ergebnissen lassen sich somit Implikationen für die Gestaltung, Moderation und Führung virtueller Zusammenarbeit ableiten.

Photosystem I-LHCII megacomplexes respond to high light and aging in plants

Photosystem II is known to be a highly dynamic multi-protein complex that participates in a variety of regulatory and repair processes. In contrast, photosystem I (PSI) has, until quite recently, been thought of as relatively static. We report the discovery of plant PSI-LHCII megacomplexes containing multiple LHCII trimers per PSI reaction center. These PSI-LHCII megacomplexes respond rapidly to changes in light intensity, as visualized by native gel electrophoresis. PSI-LHCII megacomplex formation was found to require thylakoid stacking, and to depend upon growth light intensity and leaf age. These factors were, in turn, correlated with changes in PSI/PSII ratios and, intriguingly, PSI-LHCII megacomplex dynamics appeared to depend upon PSII core phosphorylation. These findings suggest new functions for PSI and a new level of regulation involving specialized subpopulations of photosystem I which have profound implications for current models of thylakoid dynamics.

Correction to: Photosystem I-LHCII megacomplexes respond to high light and aging in plants

The funding statement in the last sentence of the Acknowledgements section in the original publication is incorrect. The corrected Acknowledgements section is printed below.

[Attitude towards organ and tissue donation in Europe : Prerequisite for osteochondral allograft treatment]

BACKGROUND

The biggest obstacle to overcome for routine treatment of various pathologies with fresh osteochondral allograft is the availability of tissue for transplantation. Large fresh osteochondral allografts are usually harvested from organ donors, but in contrast to organs, tissues can be procured after cardiac arrest.

OBJECTIVE

Medical staff as well the general public are much less aware of the possibilities and requirements of tissue donation compared to organ donation. This review aims to highlight the current situation of organ and tissue donation in Europe and to raise this much needed awareness.

MATERIAL AND METHODS

For this research, PubMed database was scanned using the terms "tissue/organ donation", "bone donation/transplantation", "cartilage transplantation/allografts" and "osteochrondral allografts".

RESULTS

Relatives of potential donors are often not approached because physicians and nurses do not feel sufficiently prepared for this task and, thus, are reluctant to address this topic. Different options could alleviate the pressure medical staff is feeling. Furthermore, there are different factors influencing consent that can be addressed to increase donation rates.

CONCLUSION

Currently, a lot of potential concerning musculoskeletal tissue grafts remains unused. Most importantly, families should be encouraged to speak about their potenzial will to donate and educational programs should be established to increase trust in organ and tissue donation and the allocation system and to increase knowledge about the importance of transplantation medicine. But joined efforts of different parts of the medical systems and different organizations involved in tissue transplantation should improve the situation for patients waiting for much needed transplants.

Fresh osteochondral allografts-procurement and tissue donation in Europe

Fresh osteochondral allografts are a well-established treatment for large, full-thickness cartilage defects. The clinical outcome for carefully selected patients is very favorable, especially for the young and active and graft survival up to 25 years has been described in the literature. Furthermore, a high patient satisfaction rate has been reported, but the biggest obstacle to overcome is the availability of tissue for transplantation. Large fresh bone allografts for cartilage damage repair only can be harvested from organ donors following organ removal or cadaveric donors, preferably in the setting of an operation room to minimize possible contamination of the tissue. Apart from the logistic challenges this entails, an experienced recovery team is needed. Furthermore, the public as well as medical staff is much less aware of the possibility and requirements of tissue donation than organ donation and families of deceased are rarely approached for bone and cartilage donation. This review aims to highlight the current situation of organ and tissue donation in Europe with special focus on the processing of bones and possible safety and quality concerns. We analyze what may prevent consent and what might be done to improve the situation of tissue donation.

[Orthotic Supply after Complex Trauma of the Foot]

BACKGROUND

After complex trauma of the foot, patients frequently need orthotic care. There have been no systematic studies on the quality of care or patient satisfaction. Therefore the goal of this study was to evaluate patient satisfaction and the quality of orthotic care.

PATIENT AND METHODS

In a prospective non-randomized, cross-sectional intervention study, the quality of care and patient satisfaction with orthotic devices were evaluated clinically and pedographically. This was followed by a lengthy discussion and recommendation to improve the insoles or shoes. These improvements were followed up by a written/telephone survey. 39 of the 50 recruited patients with complex trauma of the foot (78 %) were supplied with orthotic devices (insoles, modifications of the sole and orthopaedic shoes).

RESULTS AND CONCLUSION

Most patients (76 %) were content with their orthotic care. However, shortcomings were noted in 20 patients. These were: insufficient arch support/stabilization, inadequate support of roll-off and unsatisfactory unloading of the forefoot. 23 % of the patients did not use their orthotic devices. Compliance increased after counseling. However, half of the patients had problems in obtaining reimbursement for the modifications recommended. In conclusion, orthotic treatment of patients after complex trauma of the foot is demanding. Modifications of the devices are frequently needed. Interprofessional collaboration plays an important role.

[Modern fetal autopsy oriented to clinical demands using technical information methods]

Modern ultrasonic diagnostic instruments with high resolution and color Doppler sonography allow the obstetrician to describe pathological findings very precisely and at an early stage of pregnancy. The use of high-resolution ultrasound makes it possible to detect heart malformations already between the 8th and 10th week of gestation. This development has essentially changed the clinical requirements on fetal autopsy which in its traditional way no longer meets the increased demands. Unless the pathologists faces this challenge the importance of fetal autopsy will diminish. Modern image databases and communication techniques allow the pathologist to have direct access to text and images of pre-findings by other clinics. Great importance, however, must be attached to the interdisciplinary cooperation with obstetricians and geneticists. We report on routine fetal autopsy by using an interdisciplinary database an the Charité.

Genetic control of diabetes induction by complete Freund's adjuvant combined with subdiabetogenic doses of streptozotocin in Lewis rats--evidence for transient cytotoxicity against beta cells

The non-specific activation of the immune system by administration of complete Freund's adjuvant (CFA) was examined in two congenic Lewis rat strains LEW. 1A (RT1a) and LEW. 1W (RT1u) as a possible mean of amplification of the specific immune response, directed to pancreatic beta cells induced by multiple non-diabetogenic injections of streptozotocin (STZ). Rats were given intraperitoneally 0.5 ml CFA and 1 day later 25 mg/kg body weight STZ. This combined treatment was repeated twice at weekly intervals. Control groups received vehicle, STZ or CFA only with the same doses and at the same times. Only CFA/STZ-treated rats developed a persisting hyperglycaemia (greater than 15 mmol/l glucose) namely 3/18 (17%) LEW. 1W and 47/76 (62%) LEW. 1A rats. The pancreatic insulin content in these hyperglycaemic rats was reduced by 96.6% in LEW. 1A rats and by 93% in LEW. 1W rats measured 8 weeks after the last CFA/STZ treatment. The response to CFA indicated by an increase of number of peripheral leucocytes and relative spleen weight gain at 7 days after CFA administration, was higher in LEW. 1A rats compared with those of LEW. 1W rats. Spleen cells harvested 72 h/48 h after the first and second CFA/STZ administration showed a cytotoxic reaction to isolated syngeneic islets as measured by 51Cr-release in vitro. Control rats receiving vehicle, STZ or CFA only showed no cellular anti-islet cytotoxicity. The anti-islet cytotoxicity of spleen cells was only transient and disappeared after the third CFA/STZ administration. Anti-islet cytotoxic antibodies were not detectable in this short-term study.(ABSTRACT TRUNCATED AT 250 WORDS)