Abstract In this study, the tribological properties of fused deposition modelling (FDM) 3D printed Polylactic Acid (PLA) is studied when it slides against a steel disk at various speeds. pins were using PRUSA MINI+ Printer according to recommended printing parameters. Pin on disc tests conducted normal load 20 N, sliding time minutes, and linear speeds 0.46, 0.58, 0.7 0.81 m/s . Experiment resu...

OBJECTIVES This study evaluated the influence of air-particle abrasion protocols on the surface roughness (SR) of zirconia and the shear bond strength (SBS) of dual-polymerized resin cement to this ceramic. MATERIALS AND METHODS Sintered zirconia blocks (n = 115) (Lava, 3M ESPE) were embedded in acrylic resin and polished. The specimens were divided according to the 'particle type' (Al: 110 µ...

BACKGROUND Air-abrasion can be used for enamel preparation before fissure sealing as well as acid etching which is the evidence-based method for enamel preparation before sealing. AIM The aim of this study is to evaluate the status of sealed occlusal surfaces of the first permanent molars after one, two, and five years and to compare consequence of using the two different methods for enamel p...

During sowing of pesticide-treated seeds, pesticide-laden dust and abraded seed particles may be emitted to the environment, possibly leading to environmental contamination and posing health risks. In many countries there is currently no legislation concerning the acceptable amount of dust of treated seeds. This study aimed to gain insight in the abrasion potential of available pesticide-treate...

PURPOSE To compare three different treatment modalities for traumatic corneal abrasions. METHODS We conducted a prospective, randomized, masked, three-arm clinical study of patients presenting with superficial corneal foreign bodies. Treatment modalities were: (1) pressure patching with ofloxacin ointment (patch group, PG, n = 18), (2) therapeutic contact lens with ofloxacin eye drops (contac...

BACKGROUND Meshes implanted intraperitoneally are known to cause adhesions potentially resulting in complications such as chronic pain, enterocutaneous fistula, or mesh infection. This study introduces a model for investigation of intestine-to-mesh adhesions and evaluates as to whether missing of visceral peritoneum is causative. METHODS In 18 rats, rectangular 1.5 x 2 cm patches of an uncoat...

PURPOSE Our aim was to correlate the overall patient volume and the incidence of several ophthalmological diseases in our emergency department with weather data. PATIENTS AND METHODS For data analysis, we used our clinical data warehouse and weather data. We investigated the weekly overall patient volume and the average weekly incidence of all encoded diagnoses of "conjunctivitis", "foreign b...

Gingival health and appearance are essential components of an attractive smile. Gingival pigmentation results from melanoblastic activity. ‘Black gums’ are common esthetic problem particularly in patients who have a very high smile line (gummy smile). Different treatment modalities have been reported for depigmentation of gingiva such as bur abrasion, scraping, partial thickness flap, cryothera...