No abstract

Purpose Health professionals, especially in dentistry, are involved at high risk of microbial cross contamination. There are many studies that reported the risk of cross-contamination in prosthetic laboratories. Although much importance has been given to infection control practices, such as the barrier technique, sterilization, and disinfection of the dental office and instruments, less emphasis has been given for the disinfection of dentures. The dentures in mouth are prosthetic medical devices that create an appropriate habitat for both pathogenic and nonpathogenic organisms to nurture. To avoid cross-contamination, denture disinfection is mandatory. This study evaluated the efficacy of four denture disinfectants on four most common organisms found in denture biofilm at two different time intervals. Materials and Methods Three hundred twenty denture base acrylic resin specimens were fabricated by means of wax patterns with dimensions diameter 15 mm × 4 mm. The contamination of samples was done by the four microorganisms taken in study that were Staphylococcus aureus, Candida albicans, Pseudomonas aeruginosa, and Escherichia coli. The contaminated samples were disinfected by immersion procedure in four disinfectants that were sodium hypochlorite, glutaraldehyde, peracetic acid, and chloroxylenol. Results Sodium hypochlorite was the best disinfectant resulting in complete elimination of microorganisms in 5 minutes immersion time. Glutaraldehyde and chloroxylenol were also effective against microorganisms. Minimum 10 minutes immersion time was required to completely eliminate the microorganisms. Peracetic acid was least effective of all showing the least reduction in microbial growth. Among the organisms, S. aureus showed the maximum resistance to disinfection, and C. albicans was the least resistant. AbstractKeywords ► disinfectants ► infection control ► microorganisms ► acrylic resin Dent J Adv Stud 2018;6:20-27

Nickel titanium rotary shaping files fundamentally changed everything in endodontics; conceptually, procedurally and economically as well. NiTi rotary files made root canal therapy more accessible and kind of fun for dentists, and dental companies were loved for making files that cost four times more than stainless steel hand files but delivered a ten times improvement. The single file systems need no disinfecting, cleaning, sterilizing and organizing the NiTi files, provide optimal cutting efficiency along with better control of file breakage and thus increased patient safety and no risk for cross contamination.

Endodontic therapy enables several advantages including maintenance of a natural tooth with restoration of its esthetics and functions. But endodontically treated teeth are often mutilated by caries fracture or previous restoration. Historically, many methods have been attempted in the search for an ideal foundation or build-up design for endodontically treated teeth. Dr. G. V. Black developed a porcelain-faced crown secured in place with a screw embedded in gold filling. Richmond crown was designed as a self-contained restoration with the post being a part of the final crown. Post can be either prefabricated or custom made. Custom-made post can be fabricated by either direct or indirect technique. In the indirect technique, impression taken should exactly replicate the parameters such as design, length, surface configuration, and diameter. The main problems while taking the impression of post space are incorporation of voids in the radicular portion and the inability to produce accurate impression in all dimensions. It mainly affects the quality of fabricated cast post. Therefore, this study is undertaken to compare the different impression techniques used for post space. It is expected that the study will reveal some useful information about the impression techniques that can be used to reproduce accurate and void-free impression of post space.

Diagnosis of vertical root fracture in an endodontically treated tooth presents with various difficulties. The diagnosis of such a fracture is a challenge to the clinician since it is based on subjective parameters. There are, however, many specific clinical and radiographical signs which, when present, can alert clinicians to the existence of such a fracture. Various methods to clinically diagnose vertical root fracture include conventional methods such as illumination, periodontal probing, staining, direct visual examination and newer techniques such as cone beam computed tomography, optical coherence tomography. The management of a vertical root fracture has always been considered a difficult task for the endodontist. This article provides an insight into the various methods of diagnosis and treatment strategies for the vertical root fracture.