A Histologic and Histomorphometric Evaluation of an Allograft, Xenograft, and Alloplast Graft for Alveolar Ridge Preservation in Humans: A Randomized Controlled Clinical Trial.

The aim of this study was to clinically evaluate the guided bone regeneration (GBR) potential of allograft, xenograft, and alloplastic materials in combination with resorbable membranes in extraction sockets. The qualitative and quantitative assessments of this prospective study were accomplished through histologic and histomorphometric analysis. Three experimental groups and 1 control group for comparison (n = 8) received either an allograft (human cancellous bone, freeze dried, Deutsches Institut für Zell und Gewebeersatz, Berlin, Germany), xenograft (BioOss, Geistlich Pharma AG, Wolhusen, Switzerland), or alloplast (biphasic calcium sulphate, Bondbone, MIS Implants Technologies Ltd.

Surface characterization of monolithic zirconia submitted to different surface treatments applying optical interferometry and raman spectrometry.

This study evaluated roughness parameters and phase transformation of monolithic zirconia ceramics after various mechanical and laser thermal treatments. Fully sintered monolithic zirconia cylinder specimens were divided to five groups, according to the applied surface treatment: CL: control, GB: grit-blasted with glass particles. AL50: grit-blasted with 50 μm alumina particles, AL90: grit-blasted with 90 μm dyed-alumina particles and FEML: subjected to femto laser thermal treatment.

The effects of the financial crisis on the general and dental health status of Greek citizens.

Purpose: To present the impact of the financial crisis on health status and dental health in Greece and compare it to the European Union and Finland and to identify any changes in health-related expenditure focusing on pharmaceutical expenditure and generic medicines.

Design/methodology/approach: Databases as Scopus, Pubmed, Google Scholar, World Health Organization, Eurostat, and Elstat were used.

Findings: Indicators, such as mortality and life expectancy, show that there is no clear correlation between health deterioration and financial crisis while dental health has deteriorated.

Surface characterization of zirconia dental implants.

Objectives: The aim of the study was to characterize the chemical composition, microstructure and roughness of two commercially available zirconia dental implants (WhiteSky and Zit-Z).

Methods: The chemical composition of the cervical collar and threaded root parts of the implants (n=2) were studied by XPS and HV-EDX. LV-SEM was used for morphological assessment, Raman microanalysis for microstructural characterization and optical profilometry for surface roughness measurements.

Failure mechanism of ProTaper Ni-Ti rotary instruments during clinical use: fractographic analysis.

Aim: To evaluate the failure mechanism of ProTaper Ni-Ti rotary instruments fractured under clinical conditions.

Methodology: A total of 46 ProTaper instruments that failed (fractured and/or plastically deformed) during the clinical use were collected from various dental clinics, whereas a new set of ProTaper instruments served as control. After inspection under stereomicroscopy the instruments were classified into three categories: (i) plastically deformed but not fractured, (ii) fractured with plastic deformation and (iii) fractured without plastic deformation.

Oral self-care behaviours: comparing Greek and Japanese dental students.

Aim: This study explored cross-cultural differences of self-reported oral health behaviours between Greek and Japanese dental students.

Participants: The sample population included 877 dental students, 539 students registered at the University of Athens Dental School, and 338 registered at the Hiroshima University Dental School.

Material And Methods: Oral health behaviour was assessed using the Greek and Japanese versions of a 20-item questionnaire entitled Hiroshima University-Dental Behavioural Inventory (HU-DBI).

Gingival fibromatosis and significant tooth eruption delay in an 11-year-old male: a 30-month follow-up.

This case report describes the dental management of an unusual case of idiopathic gingival fibromatosis with multiple impacted primary teeth, and the absence of eruption of permanent teeth, in an 11-year-old boy and at the 30-month follow-up. The patient presented with severely enlarged gingival tissues affecting both arches and multiple retained and non-erupted primary teeth. He had already been subjected to localized gingivectomies at the ages of 7 and 9 years.

Perceived sources of stress among Greek dental students.

The goals of this study were to identify sources of stress in dental education and to explore the role of year of study and gender on perceived stressors. Five hundred and seventy-one undergraduates, officially registered at the University of Athens School of Dentistry, participated in the survey by completing a thirty-item modified version of the Dental Environment Stress Questionnaire. Assigned workload, performance pressure, and self-efficacy beliefs constituted the most stress-provoking factors.

Greek dental students' attitudes toward tobacco control programmes.

Aim: To explore the preparedness of Greek dental university students for advising patients to quit smoking; how the awareness of the students is modified from the beginning of university studies to graduation; and how it is associated with their smoking habits.

Materials And Methods: Officially registered dental students (n=165) participated in the study by completing anonymously a 16-item questionnaire. Data analysis was conducted with the use of standard univariate statistical methods, whereas multivariate analysis relied on logistic regression modelling.

Primary teeth caries removal using the Carisolv chemomechanical method: a clinical trial.

Purpose: The purpose of this controlled clinical trial was to compare the working time for caries removal in primary teeth, the need for local anesthesia and patient cooperation, when the chemomechanical Carisolv or the conventional mechanical method were used.

Methods: The sample consisted of primary teeth of children who had occlusal or buccal carious lesions into dentin. High speed and/or low speed were used as the conventional mechanical method of caries removal.

Improvement of facial appearance and nocturnal breathing with geniotomy (sliding genioplasty): report of two cases.

This article reports on two cases of nonobese female patients who presented in an orthodontic practice complaining of dental malocclusion and facial dysharmony. Because of the observed clinically and radiographically extreme mandibular retrognathia, they were referred for a sleep study and were found to have mild sleep apnea. Surgery in the form of advancement geniotomy was offered to relieve their retroglossal obstruction, improve their nocturnal sleep, and simultaneously address their facial esthetic concerns.

Prostaglandin E--a powerful anabolic agent for generalized or site-specific bone formation.

Prostaglandins are locally secreted, rapidly metabolized, biologically active fatty acids first identified in the prostate. The role of prostaglandins in the inflammatory response has been widely studied. However, some prostaglandins, particularly those of the E series (PGEs), can suppress inflammation, making it difficult to understand the local events and their sequence.

Microstomia following facial burns.

Deep burns to the face and lips often lead to the formation of scar tissue and contracture of the perioral tissues with marked reduction of the ability of the patient to open his mouth. The mouth tends to be turned into a wrinkled, rigid, unyielding structure, resembling the semi-rigid mouth of the fish. Such burns are most frequently caused by electricity or flames, and less frequently by chemical substances.

Association of cemento-enamel junction--alveolar bone crest distance and proximal caries in primary molars.

The present cross-sectional investigation examined the relationship between proximal caries/defective restorations, dental plaque and gingival indices and the distance of the cemento-enamel junction to the alveolar bone crest (CEJ-ABC). Three hundred and eight children aged 7 years were examined. Proximal caries and defective restorations were diagnosed in bite-wing radiographs.

Crown-root fracture of lower molar--restorative procedures.

Endodontically treated teeth may undergo crown, crown-root, or root fractures. The treatment of fractured teeth can be complicated, sometimes because of difficulties with the final restoration. This case report describes a case of crown-root fracture of a left lower first molar in which endodontic treatment and rapid orthodontic eruption of the tooth made a good prosthetic restoration possible.

The time used to administer local anesthesia to 5 and 6 year olds.

Pediatric dentistry and local anesthesia textbooks recommend injecting the local anesthetic during dental anesthesia and the rate of 1 ml per min. On the other hand, there are indications that, in practice, most dentists inject the anesthetic considerably faster. There has been no study indicating an ideal rate.

Light-cured combination obturator prosthesis.

A technique for the fabrication of an open combination (hard-resilient) obturator prosthesis with VLC materials for patients undergoing partially edentulous maxillectomy is described. VLC denture resins and resilient liners are an exciting innovation in prosthodontic treatment and offer the maxillofacial prosthodontist a wider choice of treatment modalities. The technique and the resultant obturator prosthesis have the following advantages: 1.

A comparative in vitro study of visible light-cured sealants.

The introduction of visible light polymerization in dentistry led to the development of a new generation of pit and fissure sealants. The purpose of this study was an overall evaluation of some in vitro characteristics of four new sealants (Delton LC, Helioseal, Pentra-Seal and Visioseal) in comparison with a chemically cured control (Delton). The results indicate that the monomer systems utilized in the new materials have already been used in dental polymer technology.