OBJECTIVE Implants are being used in orthodontics as a reliable mode of anchorage. Among other factors, the cortical bone thickness plays a major role in determining the stability of these implants. The objective of this study was to study the relationship of various arch forms and the cortical bone thickness and to determine if the cortical bone thickness varies between various arch forms. Thi...

BACKGROUND Treatment of complex aortic pathologies involving the transverse arch with extensive involvement of the descending aorta remains a surgical challenge. Since clamshell incision provides superior exposure of the entire thoracic aorta, we evaluated the use of this technique for single-stage total arch replacement by arch vessel reconstruction. METHODS The arch-first technique combined...

In order to reduce the amplitude of bench press, athletes use a specific technical element "arch", which involves significant bending back. The "arch" allows indicators mechanical work, amount applied force, trajectory vertical movement bar and distance travelled by bar. problem using an extremely high press arch during is important task modern sports practice. goal study ways objectifying rule...

0031-9007= We show that matter effects change the ! oscillation probability by as much as 70% for certain ranges of energies and path lengths. Consequently, the ! survival probability also undergoes large changes. A proper understanding of survival rates must consider matter effects in P as well as P e. We comment on (a) how these matter effects may be observed and the sign of 31 determined in ...

Model a network as an edge-weighted graph, where the (unknown) weight we of edge e indicates the frequency of observed interactions, and over time t we observe a Poisson(twe) number of interactions across edges e. How should we estimate some given statistic of the underlying network? This leads to wide-ranging and challenging problems, on which this article makes only partial progress.

In the present paper, nonlinear behavior of mass concrete simulated by smeared crack model is combined with Endurance Time Analysis (ETA) method for studying seismic response of arch dams. ETA is a time-history based dynamic pushover procedure in which special predesigned intensifying acceleration functions are used for analysis and estimation of structural responses in various performance leve...

conclusions according to our results, these clinical measurements would provide valid information regarding the structure of the medial longitudinal arch. patients & methods clinical measurements of arch index (ai) and foot posture index (fpi) were performed on 40 subjects (18 boys and 22 girls), aged from 5 to 7 years referred to adabian rehabilitation center, kermanshah, iran. the study was c...