Comparison of stresses in monoblock tilted implants and conventional angled multiunit abutment-implant connection systems in the all-on-four procedure.

Background: The All-on-four dental implant method is an implantology method designed to provide a comfortable prosthetic treatment option by avoiding advanced surgical procedures. This research aims to compare and evaluate the stress and tension values in conventional angled multiunit abutment-implant connection systems and monoblock dental implants used in the all-on-four procedure with finite element analysis.

Methods: Two master models were created by placing four implants connected to multiunit abutments (group A) in the interforaminal region of a completely edentulous mandible and four monoblock implants (group B) in the same region of another completely edentulous mandible.

Evaluation of peri-implant crevicular fluid prostaglandin E levels in augmented extraction sockets by different biomaterials.

Objectives: This study compares peri-implant crevicular fluid (PICF) prostaglandin E (PGE) levels, clinical parameters and implant stability quotient (ISQ) values around implants placed in augmented extraction sockets.

Materials And Methods: The sockets (24 in total) were randomly augmented using either EMD or Bio-Oss Collagen. Implant placements were performed after three months of healing.

Enamel matrix derivative (emdogain) or subepithelial connective tissue graft for the treatment of adjacent multiple gingival recessions: a pilot study.

One treatment approach for achieving healing by regeneration is the application of enamel matrix derivative (EMD) during periodontal surgery. The aim of this randomized clinical study was to compare the efficacy of EMD with a connective tissue graft (CTG) for the treatment of adjacent Miller Class l and II multiple gingival recessions. Twelve systemically healthy subjects with at least two Miller Class I or II multiple gingival recession defects affecting adjacent teeth on both sides of the mouth were enrolled.

Effects of decontamination and implant surface characteristics on re-osseointegration following treatment of peri-implantitis.

Background: Although considerable bone fill may occur following treatment of peri-implantitis, re-osseointegration appears to be limited and unpredictable.

Objectives: To evaluate the effects of various decontamination techniques and implant surface configurations on re-osseointegration of contaminated dental implants.

Material And Methods: Three months after tooth extraction, implants consisting of a basal part and an exchangeable intraosseous implant cylinder (EIIC) were placed in the mandibles of dogs.

Differentiation of human embryonic stem cells on periodontal ligament fibroblasts in vitro.

Human embryonic stem cells (hESCs) are pluripotent cells with unlimited proliferation potential and differentiation capacity to all types of somatic cells. Periodontal tissue engineering based on in vitro expanded cells holds the promise to overcome the limitations associated with contemporary regenerative techniques. The aim of this study was to investigate the differentiation patterns of hESCs under the influence of periodontal ligament cells in vitro.

Encapsulation and osteoinduction of human periodontal ligament fibroblasts in chitosan-hydroxyapatite microspheres.

Periodontal ligament cells play a crucial role in the regeneration of periodontal tissues and an undifferentiated mesenchymal cell subset is thought to exist within this population. The aim of this study was to assess the osteogenic differentiation potential of human periodontal ligament fibroblasts (hPDLFs) in three dimensional (3D)-osteogenic culture environment following encapsulation in chitosan-hydroxyapatite (C/HA) microspheres with the size range of 350-450 microm. Human PDLF cultures were established and three experimental groups were formed: (i) two-dimensional (2D)-culture as single cell monolayer, (ii) 3D-static culture of C/HA encapsulated hPDLFs, and (iii) 3D-dynamic culture of C/HA encapsulated hPDLFs in a rotating wall vessel bioreactor.

New formation of periodontal tissues around titanium implants in a novel dentin chamber model.

Direct bone-to-implant contact, defined as "osseointegration", is considered most optimal for long-term stability and survival of dental implants. However, the possibility of the formation of a tooth-like attachment apparatus around implants has also been demonstrated. The purpose of this study was to explore the formation of periodontal tissues around titanium implants using a novel and unique experimental model.

Evaluation of periodontal healing in class II furcation defects following guided tissue regeneration with two different types of polylactic acid membranes.

Background: Guided tissue regeneration procedures provide predictable reconstruction of periodontal tissues in the treatment of furcation involvements in animals and humans. This study was to compare long-term effectiveness of two different types of polylactic acid (PLA) membranes on periodontal regeneration in surgically created class II furcation defects in dogs.

Methods: Full thickness mucoperiosteal flap was raised on the buccal aspects of the experimental teeth and class II furcation defects having 5 mm vertical dimensions were created on mandibular premolar III and IV on each quadrant.

Comparative clinical study of connective tissue graft and two types of bioabsorbable barriers in the treatment of localized gingival recessions.

Background: Localized buccal recessions occur in more than 60% of individuals; therefore, there is a need for predictable root coverage techniques. The objective of the present study was to evaluate the clinical effectiveness of the guided tissue regeneration (GTR) procedure versus connective tissue graft (CTG) in the treatment of localized gingival recessions over a 12-month postoperative period.

Methods: Thirty bilateral matched pairs of localized buccal recessions in 22 patients were treated with CTG and GTR in this study.