OBJECTIVES Glide path preparation is recommended to reduce torsional failure of nickel-titanium (NiTi) rotary instruments and to prevent root canal transportation. This study evaluated whether the repetitive insertions of G-files to the working length maintain the apical size as well as provide sufficient lumen as a glide path for subsequent instrumentation. MATERIALS AND METHODS The G-file s...

OBJECTIVE To determine variation in post-instrumentation working length and root area in the following rotary systems: ProTaper, RaCe, Mtwo and K3. STUDY DESIGN A sample of 40 resin blocks with double curvature (at 14 and 16 mm) and a 33 degrees angle was used. Working length was verified with a digital measure using a number 10 K file. The specific sequence for each rotary system was followe...

background: the purpose of this study was to compare the effi cacy of endovac irrigation system and side-vented closed ended needle (max-i probe) in removing smear layer from root canals at 1 mm and 3 mm from working length using protaper rotary instrumentation. materials and methods: a total of 50 freshly extracted maxillary central incisors were randomly divided into two groups after complete...

OBJECTIVE The aim of this in vitro study was to compare the capacity of the Root ZX-II and Mini Apex Locator, electronic apex locators (EALS), to prevent overestimated working length. STUDY DESIGN Forty extracted human teeth were used for the study. The cervical portion of each canal was flared using Gates Glidden drills and the teeth were embedded in an alginate model. Canals were irrigated ...

OBJECTIVES Today many clinicians use both stainless-steel hand K-files and nickel- titanium rotary files during endodontic treatment. It is of great importance for the clinician to have confidence in the accuracy of an apex locator even if these files were used interchangeably. The purpose of this in vitro study was to evaluate the accuracy of the Raypex5 electronic apex locator using stainless...

The purposes of this study were to evaluate the ability of a group of third-year dental students without any endodontic clinical experience to use the ProTaper Instruments (Dentsply Maillefer) to decrease the amount of straightening of curved canals on human molar teeth and to determine the incidence of instrument fractures and instrumentation time. Thirty-one undergraduate dental students in T...

background: epidemiology is the base of public health and preventive medicine. this study was conducted to identify the rate of awareness and attitude of 1000 fars general physicians about epidemiology science in 2010 methods: the present study performed as cross-sectional on working general physicians (gps) in 20 of fars provinces in 1-stage cluster sampling. in the study, factors such as age,...

Instruction cache performance is widely recognized as a critical component of the overall performance of a program; especially so in the case of large applications like database servers. In this report, we present a technique for (1) identifying repeated blocks of instructions in a program executable, and (2) converting these repeated code blocks into lightweight procedures (i.e. LWprocs). The ...

Efficient memory resource management requires knowledge of the memory demands of applications or systems at runtime. A widely proposed approach is to construct an LRU-based miss ratio curve (MRC), which provides not only the current working set size (WSS) but also the relationship between performance and target memory allocation size. Unfortunately, the cost of LRUMRC monitoring is nontrivial. ...

A. Vezza Request for Comments: 87 12 January 1971 NIC 5632 TOPIC FOR DISCUSSION AT THE NEXT NETWORK WORKING GROUP MEETING -------------------------------------------------------------Project MAC is planning a network graphics meeting to be held in April. It would be desirable to devote some portion of the February Urbana meeting to consideration of the length, format, structure and contents of ...