BACKGROUND To evaluate the efficacy of intramedullary K-wire fixation and interosseous wiring in the arthrodesis of the distal interphalangeal (DIP) joint with description of surgical procedure. METHODS We retrospectively analyzed 9 cases (7 women and 2 men) of DIP joint arthrodesis. The average age of patients was 44.2 years (range, 21 to 71 years) and the mean follow-up period was 19.6 mont...

At present, applications of biometrics are rapidly increasing due to inconveniences in using traditional passwords and physical keys. Hand geometry, one of the most well-known biometrics, is implemented in many verification systems with various feature extraction methods. In recent work, a hand geometry verification system using time series conversion techniques and Dynamic Time Warping distanc...

background and purpose: hand contamination is an important factor of infection transmission from dental staff to patients and vice versa. the aim of this study was to determine the effect of hand washing training on dental students’ knowledge, attitude, and clinical practice at the shahid beheshti university of medical sciences dental school in 2010. methods: this quasi-experimental study was c...

A d-dimensional simplex S is called a k-reptile (or a k-reptile simplex ) if it can be tiled by k simplices with disjoint interiors that are all mutually congruent and similar to S. For d = 2, triangular k-reptiles exist for all k of the form a2, 3a2 or a2 + b2 and they have been completely characterized by Snover, Waiveris, and Williams. On the other hand, the only k-reptile simplices that are...

introduction: to compare the cleaning effectiveness of k3 and race niti rotary systems with k-flexo file instruments during the preparation of curved canals in extracted human teeth. materials and methods: a total of 50 root canals of mandibular and maxillary molars with curvatures ranging between 25º and 35 º were divided in three groups of 15 each and 5 as negative control groups. canals were...

A k-dimensional hypertree X is a k-dimensional complex on n vertices with a full (k−1)-dimensional skeleton and ( n−1 k ) facets such that Hk(X;Q) = 0. Here we introduce the following family of simplicial complexes. Let n, k be integers with k+1 and n relatively prime, and let A be a (k + 1)-element subset of the cyclic group Zn. The sum complex XA is the pure k-dimensional complex on the verte...

liquid-liquid equilibria for the (water + lactic acid + benzyl alcohol or p-xylene) ternary systems were investigated at atmospheric pressure and in the temperature range from 298.15-318.15 k. the studied systems exhibit two types of liquid-liquid equilibrium (lle) behavior. the system consisting of benzyl alcohol displays type-1 lle behavior, while a type-2 behavior is exhibited by the other s...