Incidence of impacted and supernumerary teeth-a radiographicStudy in a North Greek population

Objectives: The aim of the present study was to investigate the prevalence of impacted and supernumerary teeth, apart from third molars. Study design: This was a retrospective study of 1.239 panoramic radiographs taken of patients who presented to the Department of Dentoalveolar Surgery, Implantology and Radiology at the School of Dentistry of the Aristotle University of Thessaloniki, Greece between 1991 and 1999. The panoramic radiographs and dental records were reviewed in order to determine whether there were impacted or supernumerary teeth. Observations were also made on the space in dentition, corresponding to the position of each impacted tooth, the lack of space for tooth eruption, transmigration, retained primary teeth or prosthetic restoration. Results: A total of 170 (13.7%) patients presented with at least one impacted tooth. None of them had an impacted incisor. Impacted canines were the most prevalent dental anomaly (8.8%), followed by impacted premolars (2.2%). Supernumerary teeth (1.8%) and impacted molars (1%) were the least common anomalies. Among the 225 impacted teeth, the most frequently affected teeth were the canines (59.6%), followed by premolars (19.1%), and supernumerary teeth (15.1%), while the incidence of impacted molars was substantially lower (6.2%). Conclusions: The most frequently impacted teeth were the maxillary canine, the second mandibular premolar and the second mandibular molar. The majority of the supernumerary teeth consisted of mesiodens. There was space in the dentition of each impacted tooth in 29.3% of the cases examined; there was a retained primary tooth in 25.1%, and a prosthetic restoration had been constructed in 24%. Insufficient space for the eruption of the impacted tooth and transmigration was observed in 17.3% and 4.2% of the cases, respectively

Why are thoracic operations postponed?

<p>Abstract</p> <p>Aim</p> <p>To investigate and present the reasons that cause the postponement of thoracic surgical operations.</p> <p>Methods</p> <p>We retrospectively included in the study all patients submitted to elective thoracic surgery in our department during the 4-year period 2007-2010 and noted all cases of postponement after official inclusion in the operating schedule.</p> <p>Results</p> <p>81 out of a total of 542 patients (14.9%) scheduled for elective thoracic operation had their procedure postponed. The reasons were mainly organisatory (in 42 cases, 51.85%), which in order of significance were: shortage in matching erythrocyte units, shortage in anaesthetic/nursing staff and unavailability in operating rooms. The rest of the cases (39, 48.1%) were postponed due to medical reasons, which in descending order of significance were: respiratory infections and exacerbations of COPD, cardiological problems, misregulation of antiplatelet/antithrombotic drugs and infections from other systems (gastrointestinal, urinary, etc.). Elderly male patients planned for major/oncologic surgery were most possible to have their operation postponed for medical reasons.</p> <p>Discussion-Conclusions</p> <p>Thoracic operations are postponed owed to organisatory as well as medical reasons, the latter mainly affecting elderly, morbid patients awaiting for major/oncologic surgery.</p

Identification of PAR-2-regulated ERK substrates and (Beta)-arrestin-interacting proteins in invasive breast cancer cells

EThOS - Electronic Theses Online ServiceGBUnited Kingdo

RADIATION SAFETY OF THE DENTAL X-RAY SETS

THE LACK OF NATIONAL TECHNICAL SAFETY REGULATIONS ENABLES US TO POSTULATE THAT BOTH THE IMPORTED DENTAL X-RAY SETS AND THOSE MANUFACTURED BY GREEK DENTAL COMPANIES ARE BASICALLY UNCONTROLLED AS FAR AS THE X-RAY PROTECTION OF BOTH PATIENTS AND DENTISTS. THUS, DUE TO THE LACK OF TECHNICAL REGULATIONS AND SAFETY CONTROL METHODS, IT IS CONSIDERED TO BE HIGHLY POSSIBLE THAT PATIENTS ARE OVEREXPOSURE TO X-RAY RADIATION, A FACT LEADING TO INCREASE OF SOMATIC, BUT MAINLY OF GENETIC RISKS. AS OUR PRINT OF REFERENCE, WE HAVE USED PARAGRAPHS 417 AND 417A OF THE INTERNATIONAL ELECTROTECHNICAL COMMISION (I.E.C.) REGULATIONS. THE FAITHFULAPPLICATORY OF THE ABOVE RULES BY THE X-RAY MANUFACTURES LEADS TO AN INCREASE OF THE SAFETY LEVEL SUPPLIED BY THE EQUIPMENT. THE CONCLUSION DRAWN FROM THE RESULTS OF THIS INVESTIGATION IS THAT ALMOST ALL THE X-RAY MACHINES WHICH WERE EXAMINED ARE TO A GREAT EXTENT IN ACCORDANCE WITH THE I.E.C. REGULATIONS.ΣΚΟΠΟΣ ΤΗΣ ΜΕΛΕΤΗΣ ΑΥΤΗΣ ΗΤΑΝ Η ΑΞΙΟΛΟΓΗΣΗ ΤΗΣ ΑΣΦΑΛΕΙΑΣ ΠΟΥ ΠΡΟΣΦΕΡΟΥΝ ΤΑ ΟΔΟΝΤΙΑΤΡΙΚΑ ΑΚΤΙΝΟΓΡΑΦΙΚΑ ΜΗΧΑΝΗΜΑΤΑ ΤΑ ΟΠΟΙΑ ΔΙΑΤΙΘΕΝΤΑΙ ΑΠΟ ΤΗΝ ΑΓΟΡΑ ΤΗΣ ΒΟΡΕΙΟΥ ΕΛΛΑΔΟΣ. Η ΕΛΛΕΙΨΗ ΤΕΧΝΙΚΩΝ ΠΡΟΔΙΑΓΡΑΦΩΝ ΑΣΦΑΛΕΙΑΣ ΜΑΣ ΔΙΝΕΙ ΤΗ ΔΥΝΑΤΟΤΗΤΑ ΝΑΥΠΟΘΕΣΟΥΜΕ ΟΤΙ ΤΑ ΕΙΣΑΓΟΜΕΝΑ ΟΔΟΝΤΙΑΤΡΙΚΑ ΑΚΤΙΝΟΓΡΑΦΙΚΑ ΜΗΧΑΝΗΜΑΤΑ, ΚΑΘΩΣ ΚΑΙ ΑΥΤΑ ΠΟΥ ΚΑΤΑΣΚΕΥΑΖΟΝΤΑΙ ΑΠΟ ΕΛΛΗΝΙΚΕΣ ΕΤΑΙΡΕΙΕΣ, ΕΙΝΑΙ ΟΥΣΙΑΣΤΙΚΑ ΑΝΕΞΕΛΕΓΚΤΑ ΟΣΟ ΑΦΟΡΑ ΤΗΝ ΠΡΟΣΤΑΣΙΑ ΤΟΥ ΑΣΘΕΝΟΥΣ ΚΑΙ ΤΟΥ ΟΔΟΝΤΙΑΤΡΟΥ. ΕΤΣΙ ΘΕΩΡΕΙΤΑΙ ΠΟΛΥ ΠΙΘΑΝΗ, ΕΞ'ΑΙΤΙΑΣ ΤΗΣ ΕΛΛΕΙΨΗΣ ΤΕΧΝΙΚΩΝ ΠΡΟΔΙΑΓΡΑΦΩΝ ΚΑΙ ΜΕΘΟΔΩΝ ΕΛΕΓΧΟΥ ΤΗΣ ΑΣΦΑΛΕΙΑΣ, Η ΥΠΕΡΑΚΤΙΝΟΒΟΛΗΣΗ ΤΩΝ ΑΣΘΕΝΩΝ, Η ΟΠΟΙΑ ΟΔΗΓΕΙ ΣΕ ΑΥΞΗΣΗ ΤΩΝ ΣΩΜΑΤΙΚΩΝ,ΚΥΡΙΩΣ ΟΜΩΣ ΤΩΝ ΓΕΝΝΗΤΙΚΩΝ ΚΙΝΔΥΝΩΝ ΑΠΟ ΤΗΝ ΑΚΤΙΝΟΒΟΛΙΑ X-RAYS ΣΗΜΕΙΟ ΑΝΑΦΟΡΑΣΤΗΣ ΕΡΕΥΝΑΣ ΧΡΗΣΙΜΟΠΟΙΗΘΗΚΑΝ ΟΙ ΚΑΤΕΥΘΥΝΤΗΡΙΕΣ ΟΔΗΓΙΕΣ ΤΗΣ INTERNATIONAL ELECTROTECHNICAL COMMISION (I.E.C.), ΤΩΝ ΟΠΟΙΩΝ Η ΠΙΣΤΗ ΕΦΑΡΜΟΓΗ ΑΠΟ ΤΟΥΣ ΚΑΤΑΣΚΕΥΑΣΤΕΣ ΟΔΗΓΕΙ ΣΕ ΑΥΞΗΣΗ ΤΟΥ ΕΠΙΠΕΔΟΥ ΑΣΦΑΛΕΙΑΣ ΤΗΝ ΟΠΟΙΑ ΠΡΟΣΦΕΡΟΥΝ ΤΑ ΜΗΧΑΝΗΜΑΤΑ.ΑΠΟ ΤΑ ΑΠΟΤΕΛΕΣΜΑΤΑ ΤΗΣ ΕΡΕΥΝΑΣ ΠΡΟΚΥΠΤΕΙ ΟΤΙ ΤΟ ΣΥΝΟΛΟ ΣΧΕΔΟΝ ΤΩΝ ΜΗΧΑΝΗΜΑΤΩΝ, ΠΟΥ ΕΞΕΤΑΣΘΗΚΑΝ ΒΡΙΣΚΟΝΤΑΙ ΣΕ ΣΥΜΦΩΝΙΑ ΣΕ ΜΕΓΑΛΟ ΒΑΘΜΟ, ΜΕ ΤΙΣ ΑΠΑΙΤΗΣΕΙΣ ΤΩΝΟΔΗΓΙΩΝ ΤΗΣ I.E.C

Concentration of organic compounds in natural waters with solid-phase dispersion based on advesicle modified silica prior to liquid chromatography

Abstract The ability of vesicle-coated silica to aid the extraction of organic compounds from water prior to liquid chromatographic analysis is presented for the first time. The method is based on the formation of silica supported cationic multi-lamellar vesicles of gemini surfactants inherently ensuring the presence of hydrophilic and hydrophobic sites for the partitioning of analytes bearing different properties. Method development is illustrated by studying the adsolubilization of UV absorbing chemicals from swimming pool water. Due to the requirement for external energy input (intense shearing) a method based on solid-phase dispersion (SPD) was applied producing better results than off-line solid-phase extraction (SPE). Meticulous investigation of the experimental parameters was conducted in order to elucidate the mechanisms behind the proposed extraction pattern. Analyte recoveries were quantitative under the optimum experimental conditions offering recoveries higher than 96% with RSD values below 5%

Initiation of DNA replication requires actin dynamics and formin activity

International audienc

Metabolism and Neurotoxicity: the Significance of Genetically Engineered Cell Lines and New Three-Dimensional Cell Cultures.

Abstract not availableJRC.I-Institute for Health and Consumer Protection (Ispra