28 research outputs found
Role of Monotonous Attention in Traffic Violations, Errors, and Accidents
Recent traffic Law in Turkey requires that drivers whose driving licenses were withheld because of their serious traffic offences be subjected to “psychotechnical assessment” tests. These tests must include measures for psychomotor and mental abilities such as monotonous attention, peripheral perception, and reasoning. Currently, we are in process of developing a computer based psychotechnical driver test system. This study investigates the validity of the monotonous attention test that is one of the measures in our system. Participants were 79 volunteer drivers from Ankara, Turkey. First, drivers completed the Driver Behavior Questionnaire (DBQ) measuring violations and errors and demographic items regarding drivers’ history of offences and accidents. Second, participants were asked to respond the Traffic Monotonous Attention Test that is a cancellation task. Initial analysis revealed that the correlations between the scores of attention index and other major variables were not significant. Therefore, a tripartite split was performed on the participants’ attention scores. The results of ANOVAs revealed that those who had medium level of attention (incorrect responses) reported higher levels of driving errors than both high and low attention groups. The examination of the relationships between accident type and the continuous attention scores indicated that those having active accidents also had higher levels of both incorrect and omitted responses than no accident and passive accident groups. Findings of this study seem to imply that individual differences in the monotonous attention should be related with accident involvement and therefore, should be considered in devising a computer-based system including the measure of monotonous attention
Diş hekimliği fakültelerinde kullanılan farklı diş ünitlerinin su ünitlerinin su sistemlerinin geri akım kontaminasyonu açısından değerlendirilmesi
Amaç: Farklı diş koltuk sistemlerine bağlı gerikaçış
engelleyici sistemlerin etkinliğinin uzun
dönem araştırılması ve farklı branşlara göre gerikaçış
sonucu ortaya çıkabilecek çapraz
enfeksiyon riskinin belirlenmesidir.
Gereç ve Yöntemler: Dişhekimliğinin birbirinden
farklı üç branşından çalışma grubu
oluşturulmuştur. Bu farklı üç gruptan elde edilen
materyaller bakteri varlığı açısından değerlendirilerek
gruplar arasındaki farklılık mikrobiyolojik
açıdan incelenmiştir.
Bulgular: Üç grupta da birçok bakteri
kolonisinin izole edildiği görülmekle birlikte
üreyen mikroorganizmaların çoğunun çevreden
ve ağız florasından sıklıkla izole edilen bakteri
kolonileri olduğu görülmüştür.
Sonuç: Diş ünit sistemlerinin kontaminasyonu
engelleyici sistemlerle donatılmasının son
derece önemli olduğu görülmüş, bununla
birlikte uzun zamandır kullanılan diş ünit
sistemlerinin sıklıkla kontrol edilmesi ve
gerektiğinde yenilenmesi sonucuna ulaşılmıştır
First-line treatment of patients with HER2-positive metastatic gastric and gastroesophageal junction cancer
Fluoropyrimidine+cisplatin/oxaliplatin+trastuzumab therapy is recommended for the first-line treatment of HER2-positive metastatic gastric adenocarcinoma. However, there is no comprehensive study on which platinum-based treatment should be preferred. This study aimed to compare the treatment response and survival characteristics of patients with HER2-positive metastatic gastric or gastroesophageal junction (GEJ) cancer who received fluorouracil, oxaliplatin, and leucovorin (mFOLFOX)+trastuzumab or cisplatin and fluorouracil (CF)+trastuzumab as first-line therapy. It was a multicenter, retrospective study of the Turkish Oncology Group, which included 243 patients from 21 oncology centers. There were 113 patients in the mFOLFOX+trastuzumab arm and 130 patients in the CF+trastuzumab arm. The median age was 62 years in the mFOLFOX+trastuzumab arm and 61 years in the CF+trastuzumab arm (P = 0.495). 81.4% of patients in the mFOLFOX+trastuzumab arm and 83.1% in the CF+trastuzumab arm had gastric tumor localization (P = 0.735). The median progression-free survival (PFS) was significantly higher in the mFOLFOX+trastuzumab arm (9.4 months vs. 7.3 months, P = 0.024). The median overall survival (OS) was similar in both groups (18.4 months vs. 15.1 months, P = 0.640). Maintenance trastuzumab was continued after chemotherapy in 101 patients. In this subgroup, the median OS was 23.3 months and the median PFS was 13.3 months. In conclusion, mFOLFOX+trastuzumab is similar to CF+trastuzumab in terms of the median OS, but it is more effective in terms of the median PFS in the first-line treatment of HER2-positive metastatic gastric and GEJ cancer. The choice of treatment should be made by considering the prominent toxicity findings of the chemotherapy regimens
Removal of a supernumerary tooth displaced into the infratemporal fossa during extraction
Accidental displacement of an impacted tooth into the infratemporal fossa (ITF) is a rare but serious complication because of the vulnerability of the surrounding anatomical structures. Here we present the case of a 40-year-old man who reported pain on the right side of his face. Panoramic radiography and cone-beam computed tomography revealed an impacted third molar and a supernumerary tooth positioned immediately below it. Under local anesthesia, the third molar was easily extracted; however, the supernumerary tooth was inadvertently displaced into the ITF. The position of the tooth was confirmed by radiographic examination, and it was immediately removed intraorally by expanding the flap and carefully dissecting the soft tissues. Clinical aspects of this rare complication were evaluated, with special emphasis on the reliability of imaging modalities and surgical techniques
Klinik ön tanı ve elektronöromiyografik i?nceleme ne kadar uyumlu?
Aim: The objective of this study was to investigate the correlation of the clinical diagnosis of patients referred to the electroneuromyography laboratory with the electrophysiological diagnosis. Material and Method: Eight hundred eighty two patients were enrolled in the study. Their ages, genders, the clinic that referred the patient, the clinical diagnosis, and the electrophysiological results were registered retrospectively and the results were statistically evaluated. Results: Five hundred twenty four of 882 patients enrolled in the study were women, while 358 of them were men. Four hundred hundred ninety nine (56,6%) of the patients were consulted by the Neurology department, 222 (25,2%) patients were consulted by the Neurosurgery deparment, 59 (6,7%) patients were consulted by the Physical medicine and rehabilitation deparment while 61 (6,9%) patients were referred by the Orthopedy department and 41 (4,6%) by other departments. Carpal tunnel syndrome was the most frequent clinical diagnosis (28,7%). Only in a small group of patients symptoms were assessed rather than the clinical diagnosis (2,9%). In 49,1% of the patients, There was correlation between clinical and electrophysiological diagnosis while 44,7% of patients had normal electroneuromyography results. Discussion: The high rate of the normal electroneuromyography tests and the statistically significant discordance of clinical diagnosis of patients with their electrophysiological test results show that, there are inessential electroneuromyography reguests
Apical extrusion of debris using self-adjusting file, reciprocating single-file, and 2 rotary instrumentation systems
Introduction The purpose of this study was to evaluate the weight of debris extruded apically from teeth using different in vitro preparation techniques. Methods Sixty-eight extracted human mandibular premolars with single canals and similar lengths were instrumented using ProTaper F2 (25,.08; Dentsply Maillefer, Ballaigues, Switzerland), the Self-Adjusting File (1.5-mm diameter; Re-Dent Nova, Ra'anana, Israel), Revo-S SU (25,.06; MicroMega, Besancon, France), or Reciproc (R25; VDW GmbH, Munich Germany). Debris extruded during instrumentation were collected into preweighed Eppendorf tubes. The Eppendorf tubes were then stored in an incubator at 70 C for 5 days. The Eppendorf tubes were weighed to obtain the final weight of the Eppendorf tubes when the extruded debris were included. Three consecutive weights were obtained for each tube. Results There were no statistically significant differences among the groups (P =.218). The ProTaper group produced the highest mean extrusion value. The Reciproc produced less debris compared with all the other instruments (P >.05). Conclusions All instrumentation techniques were associated with extruded debris. © 2013 American Association of Endodontists
Evaluation of the shear bond strength of zirconia to a self-adhesive resin cement after different surface treatment.
OBJECTIVES
The aim of this study was to evaluate the SBS of pre-sintered and sintered zirconia to a selfadhesive resin cement after various treatment (air abrasion and the Nd:YAG laser irradiation at varying power levels -1 W, 2 W and 3 W).
MATERIAL AND METHODS
Ninety-nine zirconia specimens were prepared and divided into 3 groups: control (with no surface treatment); and pre-sintered and sintered groups with surface treatment. Surface treatment was applied before sintering in the pre-sintered group and after sintering in the sintered group. After following all protocols, a resin cement was layered on the zirconia surface. Shear bond strength was measured using a universal testing machine. The results were subjected to the statistical analysis. The surface topography and phase transformation of zirconia were evaluated using the atomic force microscopy (AFM), scanning electron microscopy (SEM) and X-ray diffraction (XRD) analyses after surface treatment.
RESULTS
The laser irradiation (3 W, 1 W and 2 W) of the pre-sintered zirconia surface resulted in the highest SBS values (p < 0.001), while the lowest SBS values were obtained with airborne particle abrasion of the pre-sintered and sintered zirconia surfaces.
CONCLUSIONS
Laser irradiation increased the SBS of pre-sintered zirconia to a resin cement. Surface treatment with air abrasion had a lesser effect on the SBS values