47 research outputs found
Biodegradable and titanium osteosynthesis in maxillofacial surgery:in vitro and in vivo performances
Get PDFOsteosynthesis systems, which consist of plates and screws, are applied to fixate bone segments in maxillofacial trauma and orthognathic surgery. Titanium osteosynthesis systems are currently widely used and accepted as the gold standard. However, their disadvantages include – among others – temperature sensitivity, tactile sensation of plates and screws, possible growth restrictions of the underlying bone, hampering of radiological imaging and radiotherapy, and accumulation of titanium particles in the surrounding tissues and different organs with potential mutagenicity. Biodegradable plates and screws may reduce removal rates in a second operation, while also avoiding most of the aforementioned disadvantages of titanium osteosyntheses. Biodegradable systems have, however, their own limitations including limited mechanical properties, palpability due to bulkiness, and possible foreign body reactions. To guide the evidence-based selection of osteosynthesis systems, the research described in this thesis aimed to compare the in vitro and in vivo performances of different biodegradable osteosynthesis systems as well as to compare the (clinical) performance of biodegradable and titanium osteosynthesis systems. It was concluded that biodegradable osteosyntheses are a viable alternative to titanium osteosyntheses when applied to treat maxillofacial trauma, with similar efficacy and significantly lower symptomatic osteosynthesis removal, but with higher perioperative screw breakage. For orthognathic surgery, biodegradable osteosynthesis also is a valid alternative to titanium osteosynthesis, but with longer operation times. It was shown that the biodegradable SonicWeld 2.1 mm system (poly[D,L-lactic acid]) had the most predictable degradation profile compared to other commonly used biodegradable systems. Furthermore, the SonicWeld 2.1 mm biodegradable systems had the most favourable mechanical properties for midface fracture fixation and osteotomies, and the Inion CPS 2.5 mm biodegradable system (poly[L-co-D,L-lactic acid-co-trimethylene carbonate]) for mandibular fractures and osteotomies. Finally, it was shown that the residents’ accuracy and reliability in applying torque to titanium osteosynthesis 1.5 mm screws were insufficient, but that both accuracy and reliability could be improved using a simple preclinical training model. These findings provide new insights into the biocompatibility, and biomechanical and degradation properties of (biodegradable) osteosynthesis systems that can be used for evidence-based selection and usage of such systems in maxillofacial surgery as well as to provide leads for future research
Erratum: Correction:Antibiotic use for Australian Aboriginal children in three remote Northern Territory communities (PloS one (2020) 15 4 (e0231798))
Get PDFThere is an error in affiliation 1 for authors Timothy Howarth and Therese M. Kearns, in affiliation 4 for author Ross M. Andrews, and in affiliation 7 for author Federica Barzi. The correct
affiliation 1 is: Child Health, Menzies School of Health Research, Charles Darwin University,
Darwin, Northern Territory, Australia. The correct affiliation 4 is: Tropical Health, Menzies
School of Health Research, Charles Darwin University, Brisbane, Queensland, Australia. The
correct affiliation 7 is: Wellbeing and Preventable Chronic Diseases, Menzies School of Health
Research, Charles Darwin University, Darwin, Northern Territory, Australia
Isolated Light Chain Amyloidosis Involving the Parotid Gland: A Case Report
No full textAmyloidosis in the parotid gland is rare and is usually associated with systemic amyloidosis. Localized amyloidosis in the parotid gland is extremely rare. We present a case of localized light chain amyloidosis of the parotid gland without systemic involvement. A 70-year-old woman presented with an asymptomatic swelling of the right parotid region. The findings of a physical examination, hematologic and biochemical investigations, imaging, and cytology were inconclusive. The patient underwent an extracapsular dissection of the right parotid gland. Histologic analysis showed that the tissue of the right parotid gland mostly consisted of amyloid deposition. The amyloid stained with antibodies to lambda light chains. Additional investigations showed no systemic involvement. The patient is asymptomatic 5 months after surgery. Clinicians should be aware of the possibility of localized amyloid light chain amyloidosis in the parotid gland, especially if magnetic resonance imaging, computed tomography imaging, and ultrasound findings are inconclusive, and they should recognize, evaluate, and treat it accordingly
The Hagiographic Image of the Saintly Dorothy Barzi — Creating Personal Patterns in the Adam Makowski’s Sermon The Annual and Perennial Reminder
No full textThe object of the presentation is not another attempt to reconstruct a biography, but an analysis of
the image praise created by Father Adam Makowski. The image that has been created in the form of oratory. The author is respecting the rules of constructioning anniversary sermons. Convention exploits in
order to make a monument for the dead, which has been created for herself, living piously fulfilling the
works of mercy and materially supporting the Jesuits and the poor. The title of oration seems to indicate
such an intention by the writer: The Annual and Perennial Reminder [...] Dorothy of Ojźrzaków Barzina
[...] at the Memorial Service Offered. Literary imagery requires the overview in the light of hagiographic
writing conventions. This is all the more necessary that Dorothy Barzi was describing as saintly, the pious,
holy. This article presents an outline of a biographical figure, analysis of the structure of the sermon. The
article juxtaposes conventions of funeral preaching and hagiographic text functions, and finally discusses
the elements of the hagiographic image of Dorothy Barzi. These elements are: the origin, marital status
(adequately the praise of son acts), pious activities, taking on persecution, work for the Church, mortification (posts cilice), showing humility, concern for the Jesuits (donations), the poor (charity), the sick
and imprisoned (care), setting a school for girls, pious death.Udostępnienie publikacji Wydawnictwa Uniwersytetu Łódzkiego finansowane w ramach projektu „Doskonałość naukowa kluczem do doskonałości kształcenia”. Projekt realizowany jest ze środków Europejskiego Funduszu Społecznego w ramach Programu Operacyjnego Wiedza Edukacja Rozwój; nr umowy: POWER.03.05.00-00-Z092/17-00
Linear and profilometric changes of the mucosa following soft tissue augmentation in the zone of aesthetic priority:A systematic review and meta-analysis
Get PDFOBJECTIVES: To assess the outcomes of soft tissue augmentation, in terms of change in level and thickness of mid-buccal mucosa, at implants sites in the zone of the aesthetic priority.MATERIAL AND METHODS: MEDLINE, EMBASE and Cochrane Central Register of Controlled Trials databases were searched (last search on 1 June 2020). Inclusion criteria were studies reporting outcomes of different materials and timing of grafting in patients undergoing soft tissue augmentation at implant sites in the aesthetic zone with a follow-up of ≥1 year after implant placement. Outcome measures assessed included changes in level and thickness of mid-buccal mucosa, implant survival, peri-implant health and patients' satisfaction.RESULTS: Eighteen out of 2,185 articles fulfilled the inclusion criteria. Meta-analysis revealed a significant difference in vertical mid-buccal soft tissue change (0.34 mm, 95% CI: 0.13-0.56, p = .002) and mid-buccal mucosa thickness (0.66 mm, 95% CI: 0.35-0.97, p < .001) following immediate implant placement in favour of the use of a graft versus no graft. Mean difference in mid-buccal mucosa level following delayed implant placement (0.17 mm, 95% CI: 0.01-0.34, p = .042) was also in favour of the use of a graft versus no graft. With regard to mucosa thickness, the use of a graft was not in favour compared with no graft following delayed implant placement (0.22 mm, 95% CI: -0.04-0.47, p = .095). Observed changes remained stable in the medium term.CONCLUSION: Soft tissue augmentation in the zone of the aesthetic priority results in less recession and a thicker mid-buccal mucosa following immediate implant placement and less recession in mid-buccal mucosa following delayed implant placement compared with no graft.</p
Reply on: Autologous pericardium could be a good option as patch material for sensitive patients undergoing carotid endarterectomy surgery to avoid legal consequences
Get PDFTrust, but verify: response to "Titanium plate removal in orthognathic surgery: prevalence, causes and risk factors. A systematic literature review and meta-analysis"
Get PDFSingle crown restorations supported by 6-mm implants in the resorbed posterior mandible:A 10-year prospective case series
Get PDFPurpose: To assess marginal bone level changes, implant and restoration survival, condition of the peri-implant mucosa, and the patient's satisfaction with the single restoration supported by a 6-mm long implant in the posterior mandible after 10 years in function.Materials and Methods: Twenty-one consecutive patients missing premolars or molars in the posterior mandible, with a bone volume consisting of a width of at least 6 mm and an estimated height of 8 mm between the top of the ridge and alveolar nerve, were included. Each patient received one or more 6-mm implants. After 3 months, the implants were restored with custom-made titanium abutments and cemented zirconia-based porcelain crowns. The clinical examination and radiograph data were assessed at restoration placement and after 12, 60, and 120 months. The patients answered a questionnaire to score their satisfaction before treatment and after 12, 60, and 120 months with the restoration in function.Results: A total of 31 implants were placed. Implant survival was 100%. The 10-year mean marginal bone loss was 0.18 mm (SE: 0.08). The plaque, calculus, gingiva, and bleeding indices scores were low as was the mean pocket probing depth. The patients' satisfaction was high.Conclusion: The 10-year follow-up data of this limited case series study reveal that 6-mm dental implants inserted in the resorbed posterior mandible provide a solid basis for single tooth restorations.</p
Single immediate implant placement in the maxillary aesthetic zone with and without connective tissue grafting:Results of a 5-year randomized controlled trial
Get PDFAIM: To assess the 5-year effects of grafting connective tissue while undertaking single immediate implant placement and provisionalization at the mid-buccal mucosa level (MBML). Secondary outcomes were buccal bone wall thickness (BBT), marginal bone level (MBL) and patient satisfaction.MATERIALS AND METHODS: Sixty patients with a single failing tooth in the maxillary anterior region were provided with an immediately placed and provisionalized implant. At implant placement, the patients randomly received either a connective tissue graft from the maxillary tuberosity (n = 30, test group) or no graft (n = 30, control group). The alveolar socket classification was mainly Type 2A. Data were collected before removing the failing tooth (T 0 ), and at 1 (T 1 ), 12 (T 12 ) and 60 (T 60 ) months after final crown placement. The primary outcome was the change in MBML compared with the pre-operative situation. Additionally, the change in BBT, MBL, aesthetics (using the Pink Aesthetic Score-White Aesthetic Score), soft-tissue peri-implant parameters and patient satisfaction were assessed. RESULTS: At the 5-year follow-up, 27 patients could be analysed from each group. In each group, one implant was lost during the osseointegration period, within 3 months of placement, resulting in an implant survival rate of 96.7% in both groups. MBML change at T 60 was -0.6 (-1.1 to -0.1) mm in the control group and 0.1 (-0.4 to 0.5) mm in the test group (p = .008). BBT and MBL, aesthetics, soft-tissue peri-implant parameters and patient satisfaction showed stable results and satisfied patients, without clinically relevant differences between the groups. CONCLUSIONS: This 5-year follow-up study shows that grafting connective tissue when replacing a single failing tooth with immediately placed and provisionalized implant results in favourable peri-implant tissues and fewer MBML changes.</p
