Background: Nonresorbable membranes promote bone formation during guided bone regeneration (GBR), yet the relationships between membrane properties and molecular changes in the surrounding tissue are largely unknown.
Aim: To compare the molecular events in the overlying soft tissue, the membrane, and the underlying bone defect during GBR using dual-layered expanded membranes versus dense polytetrafluoroethylene (PTFE) membranes.
Materials And Methods: Rat femur defects were treated with either dense PTFE (d-PTFE) or dual-layered expanded PTFE (dual e-PTFE) or left untreated as a sham.
Objectives: This clinical randomized study aimed to evaluate the early plaque formation on nonresorbable polytetrafluoroethylene (PTFE) membranes having either a dense (d-PTFE) or an expanded (e-PTFE) microstructure and exposed to the oral cavity.
Material And Methods: Twelve individuals were enrolled in this study. In a split-mouth design, five test membranes (e-PTFE) with a dual-layer configuration and five control membranes (d-PTFE) were bonded on the buccal surfaces of posterior teeth of each subject.
Clin Oral Implants Res
November 2017
Objective: To evaluate the accuracy between the intra-surgical and the peri-apical radiographic measurements of bone loss at implant with peri-implantitis.
Materials And Methods: A total of 46 Brånemark implants in 24 patients with diagnosis of peri-implantitis were included in the study. The amount of peri-implant bone loss occurred at those implants was measured during peri-implant surgery and compared to the radiographic bone loss measured by three independent examiners.
The working hypothesis of guided bone regeneration (GBR) is that the membrane physically excludes non-osteogenic tissues from interfering with bone healing. However, the underlying mechanisms are insufficiently explained. This study aimed to investigate the molecular and structural pattern of bone healing in trabecular bone defects, with and without naturally derived resorbable membrane.
View Article and Find Full Text PDFPurpose: To verify whether the diversity of systemic medical conditions and smoking act as biologic associated factors for peri-implantitis.
Materials And Methods: The PICO question was: "In patients with osseointegrated dental implants, does the presence of smoking habits or a compromised medical status influence the occurrence of peri-implantitis compared with the presence of good general health?" Smoking and systemic conditions such as type 2 diabetes mellitus, cardiovascular diseases, rheumatoid arthritis, lung diseases, obesity, cancer, deep depression, and osteoporosis were screened. Selection criteria included at least 10 patients per condition, 1 year of follow-up after implant loading, and strict cutoff levels (probing pocket depth [PPD], bleeding on probing [BOP] and/or pus, marginal bone loss) to define peri-implantitis.
Unlabelled: Bone insufficiency remains a major challenge for bone-anchored implants. The combination of guided bone regeneration (GBR) and bone augmentation is an established procedure to restore the bone. However, a proper understanding of the interactions between the bone substitute and GBR membrane materials and the bone-healing environment is lacking.
View Article and Find Full Text PDFObjectives: The aim of this study was to histologically compare the dynamics of bone healing response between calcium sulphate (CaS) and deproteinized bovine bone mineral (DBBM) particles in guided bone regeneration utilizing an extracellular matrix membrane (ECM) as barrier.
Materials And Methods: Eighteen rabbits were used in thisstudy. 5 × 5 mm defects were created in the edentulous space between the incisors and molars in the maxilla.
Aim: To evaluate the outcomes of conventional periodontal maintenance therapy on patients surgically treated for peri-implantitis.
Material And Methods: 27 patients with 149 dental implants were monitored during 5 years every 6 months. At each recall visit, the prostheses were removed to have proper access for implant examination and supra- and sub-gingival instrumentation.
Clin Implant Dent Relat Res
April 2014
Background: When a foreign body is placed in bone or soft tissue, an inflammatory reaction inevitably develops. Hence, osseointegration is but a foreign body response to the implant, which according to classic pathology is a chronic inflammatory response and characterized by bone embedding/separation of the implant from the body.
Purpose: The aim of this paper is to suggest an alternative way of looking at the reason for marginal bone loss as a complication to treatment rather than a disease process.
The objectives of this study were to evaluate the effectiveness of corporate communication activities carried out during the A(H1N1) pandemic influenza in Italy and to identify educational needs of health professionals with regards to crisis communication. The study compared two samples representing respectively the general population and health professionals, living in different regions of northern, central and southern Italy. A self-administered questionnaire was used, with questions on knowledge about preventive measures during a pandemic and on satisfaction with the adopted communication campaigns.
View Article and Find Full Text PDFClin Oral Implants Res
January 2013
Objectives: To evaluate the probing depth at implants with signs of peri-implantitis before and following the removal of the prosthetic reconstructions and its relation with the peri-implant bone level as revealed by open access flap surgery.
Material And Methods: Twenty-nine patients with 89 implants with diagnosis of peri-implantitis were included in the study. The probing pocket depth at implants before (PPD-1) and following (PPD-2) the removal of the prosthetic reconstructions was measured at four sites of the implants.
Clin Oral Implants Res
November 2011
Aim: The aim of the present study was to evaluate the outcome of a surgical procedure based on pocket elimination and bone re-contouring for the treatment of peri-implantitis.
Material And Methods: The 31 subjects involved in this study presented clinical signs of peri-implantitis at one or more dental implants (i.e.
Peri-implantitis is an infectious disease, which leads to loss of supporting bone around dental implants. To evaluate the extent and location of bone loss, 43 patients with peri-implantitis were examined. The bone loss was clinically measured at the time of dental surgery.
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