Removable dentures are commonly used in routine dental practice at older ages. Accidental swallowing of various numbers of teeth has been reported in the literature before. However, total swallowing of removable mandibular prostheses in this size is a very rare emergency. In this study, we reported a case of accidental ingestion of a partially removable mandibular prosthesis and its final passi...

In this paper we describe G/G/R+s multi- repairmen machining system with balking. The system consists of M operating machines, S spare machines, R permanent and s additional repairmen. Assuming the discrete flow of machines by continuous one, the diffusion approximation technique for the machine repair system has developed. The system will be in normal working mode if there is M operating machi...

The lower bound on the length of 'removable' cycles in Theorem 1 is essentially best possible since there exist 2-connected simple graphs of minimum degree k whose longest 'removable' cycle has length k + i. Moreover, for the special case k = 4, we can construct 2-connected, 4-regular simple graphs whose longest 'removable' cycle has length four. The following counterexample which was independe...

Given an undirected graph G= (V,E) and a source vertex s ∈ V , the k-traveling repairman (KTR) problem, also known as the minimum latency problem, asks for k tours, each starting at s and together covering all the vertices (customers) such that the sum of the latencies experienced by the customers is minimum. Latency of a customer p is defined to be the distance traveled (time elapsed) before v...

AIM This study was aimed at evaluating the quality of written prescriptions for fixed and removable prosthesis in Tabriz, northwest Iran. METHODS To assess the quality of written prescriptions for fixed and removable partial dentures, a total of 600 questionnaires were distributed among 15 licensed dental laboratories receiving both fixed and removable prosthesis projects. The technicians wer...