Dental Implants Research Today is a free monthly online journal that collates and summarizes the latest research about Dental Implants, including details on dentistry, surgery, tooth implants.

Influence of different air-abrasive powders on cell viability at biologically contaminated titanium dental implants surfaces.

Schwarz F, Ferrari D, Popovski K, Hartig B, Becker J

Department of Oral Surgery, Heinrich Heine University, Westdeutsche Kieferklinik, 40225 Düsseldorf, Germany.

Studies have indicated that oral biofilm formation at structured titanium surfaces interferes with cell adhesion and proliferation, and its removal by means of conventional treatment procedures may not be sufficient to render these surfaces biologically acceptable. Therefore, the aim of the study was to evaluate the influence of different air-abrasive powders on cell viability at biologically contaminated titanium dental implant surfaces. Intraoral splints were used to collect an in vivo biofilm on sandblasted and acid-etched titanium discs for 48 h. A single (1x) and repeated (2x) use of four different powders (amino acid glycine or sodium bicarbonate particles; range of mean particle size (d(v50)):20-75 mum) was applied at two distances (1 and 2 mm) and angles (30 degrees and 90 degrees ) to the surfaces. Specimens (2x) were incubated with SaOs-2 cells for 7 days. Residual biofilm (RB) areas (%), and surface alterations (SEM) (1x and 2x), as well as SaOs-2 cell viability, expressed as mitochondrial cell activity (MA) (counts/second) (2x specimens), were assessed. Comparable mean RB areas were observed within and between groups after both 1x (RB: 0.0% +/- 0.0% to 5.7% +/- 5.7%) and 2x (RB: 0.0% +/- 0.0%) treatments. All surface treatments did not lead to MA (2x) values comparable to the sterile control group. However, sodium bicarbonate particles resulted in significantly higher MA (2x) values than amino acid glycine powders of different sizes. This was associated with pronounced alterations of the surface morphology (2x). Within the limits of the present study, it was concluded that SaOs-2 cell viability at biologically contaminated titanium surfaces was mainly influenced by the particle type of the powder. (c) 2008 Wiley Periodicals, Inc. J Biomed Mater Res Part B: Appl Biomater, 2008.

Published 10 July 2008 in J Biomed Mater Res B Appl Biomater.
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Articles on Dental Implants published 9 July 2008:

Where can I learn how to place dental implants? Perspectives from Scandinavia and Canada.   Int J Oral Maxillofac Surg, 37(7): 593-6.

An overview is presented of the educational opportunities that exist for dentists in Canada and in the five Nordic countries who wish to learn how to implement implant dentistry in clinical practice. This theme is discussed in the context of the demographic and educational realities in these countries. Data related to dental demographics, implant dentistry educational aspects, advertisement of postgraduate education courses, and demographic and geographic facts were collected from various ... [Abstract] [Full-text]

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From 2001 to 2005, 66 patients referred for perioperative hyperbaric oxygen therapy (HBO(2)) for debridement of necrotic tissue or prevention of radionecrosis were assessed with quality of life measures, before and after completion of HBO(2) and surgery. The Medical Outcomes Short Form 36 (SF-36) and Hospital Anxiety and Depression Scale (HADS) showed no significant changes. The European Organisation for Research and Treatment of Cancer Core (EORTC-C30) questionnaire showed significant ... [Abstract] [Full-text]

A torque removal study on the primary stability of orthodontic titanium screw mini-implants in the cortical bone of dog femurs.   Int J Oral Maxillofac Surg, 37(7): 647-50.

The aim of this study was to biomechanically evaluate the primary stability of pure titanium orthodontic mini-implants, inserted into pre-drilled cavities of differing diameters. Mini-implants (1.2mm diameter) were placed into 1.0mm and 1.2mm diameter cavities prepared in the mid-region of the bilateral hind leg femurs of anesthetized beagles. Removal torque strengths were measured immediately, 1, 3, 6, 9 and 12 weeks post-insertion of the implant. For mini-implants placed into 1-mm cavities, ... [Abstract] [Full-text]

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Titanium-based biomaterials for endosseous implants have found widespread applications in the orthopedic, maxillofacial, and dental domains. Indeed, the surface characteristics such as their chemical modification control considerably the cellular response and, subsequently, the quality and the quantity of new-formed bone around the implant. In this study, human osteoprogenitor (HOP) cell adhesion on different titanium surfaces functionalized with hydroxyapatite (HA), type I collagen, or ... [Abstract] [Full-text]

Articles on Dental Implants published 7 July 2008:

Osteosynthesis and simultaneous irregular trifocal distraction osteogenesis for segmental mandibular defect after tumor ablative surgery: a case report.   Oral Surg Oral Med Oral Pathol Oral Radiol Endod.

OBJECTIVE: This paper describes a case of secondary mandibular bone reconstruction performed to place dental implants. Osteosynthesis and simultaneous irregular trifocal distraction osteogenesis were documented. PATIENT: The patient was a 51-year-old man with recurrent ameloblastoma of the mandible. Segmental mandibulectomy for tumor ablation and immediate mandibular reconstruction were performed. Because the volume of reconstructed bone was insufficient to place dental implants, trifocal ... [Abstract] [Full-text]

Maxillary sinus floor augmentation: comparing osteotome with lateral window immediate and delayed implant placements. An interim report.   Oral Surg Oral Med Oral Pathol Oral Radiol Endod.

OBJECTIVE: A retrospective study was performed to observe clinical outcomes of dental implants placed in augmented maxillary sinuses using an osteotome or a lateral approach technique with synchronous or delayed implant placement. STUDY DESIGN: A total of 61 patients were enrolled in the study. The distribution and frequency of sinus augmentation techniques and implant placements were evaluated according to the implant site and Cawood-Howell classifications. The implant survival rates were ... [Abstract] [Full-text]

Articles on Dental Implants published 4 July 2008:

Ultrasound: A potential technique to improve osseointegration of dental implants.   Med Hypotheses.

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Articles on Dental Implants published 3 July 2008:

Ultrashort Sintered Porous-Surfaced Dental Implants Used To Replace Posterior Teeth.   J Periodontol, 79(7): 1280-1286.

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