This paper presents the digital interactive experience system of the Jing-Hang Grand Canal of China and introduces some related work. The purpose of this system is to attract users’ interests in the history and culture of the Jing-Hang Grand Canal. We provide users with virtual exhibition and virtual exploring environment which make it possible that the disappeared ancient scenes and stories re...

Besides the risk of filling material extrusion throughout the apex, a satisfactory apical seal can be difficult to achieve in canals with open apices or iatrogenic enlargements of the apical constriction. These situations pose a challenge to root canal filling. This paper describes the root canal filling of a maxillary right canine with an overinstrumented apex, complete loss of the apical stop...

Successful Endodontic therapy is based on cumulative results of complete debridement and disinfection of root canal system, followed by a three dimensional obturation [1]. However, certain anatomic complexities such as very fine canals such as those commonly encountered in geriatric cases and extremely curved canals can pose a real challenge to the treating dentist [2]. Inability to completely ...

CASE REPORT This case report describes the outcome of a number of retreatments on a failed root filling in a maxillary first molar. The patient wanted all amalgams replaced by tooth-coloured Cerec restorations, including one in a symptomless maxillary molar. This tooth had a pulpotomy or a poorly done root-canal treatment 10 years earlier. The molar was root-canal retreated before placing the C...

The Panama and Suez canals greatly reduced pollutant emissions from shipping through much sailing distances. Another possible future canal is across the Kra isthmus in Thailand, reducing distances for ships travelling East Asia to Europe that sail around Malacca straits. Much literature considers economic political viability of Canal notes adverse environmental impact canal's construction. Yet,...

background: the aim of this study was to evaluate apical transportation and centering ability of single-fi le instruments, waveone primary, with full rotation versus reciprocation movement using cone-beam computed tomography (cbct) analysis in curved mesiobuccal (mb) root canal of human mandibular molars. materials and methods: thirty mb canals of mandibular molars were randomly divided into tw...

In the long history of feudal society China, Kaifeng played a vital role. During Northern Song Dynasty, became worldwide metropolis. The important reason was that Grand Canal, which excavated during Sui main transportation artery for political and military center north economic south. Furthermore, located at made it capital later Dynasty. Dynasty called “the canal-centered era.” development can...

This study aims to compare the shaping efficiency of nickel–titanium instrument systems, One Reci and ProTaper Ultimate, using micro-CT (micro-computed tomography) in traditional conservative endodontic access cavities. The experimental groups were formed according type cavity Ni–Ti file system be used. Sixty mandibular molar teeth randomly divided into two main groups, (CAC) group (TAC) group,...