OBJECTIVE The aim of this study was to compare the fracture resistance of roots obturated with different materials. STUDY DESIGN Sixty root canals were instrumented and divided into 4 equal groups (n = 15 each). The root canals in group 1 were filled with AH26 sealer and gutta-percha, in group 2 with Resilon and Epiphany, and in group 3 with Ketac-Endo Aplicap and gutta-percha. Fifteen root c...

This in vitro study investigated whether permanent anterior incisors that are endodontically treated with cemented fiber-reinforced composite (FRC) posts without additional canal preparation can potentially increase the resistance to fracture and thus reduce the rate of clinical failure in root canals. Extracted human permanent maxillary central incisors (n = 120) were randomly assigned to 2 ex...

The administration of Plumbago zeylanica root (50% EtOH) extract to |intact rats at the dose of 150 mg/kg [body weight for 60 days caused arrest of spermatogenesis. The diameter of seminiferous tubules and Leydig cell nuclei were reduced. The production of spermatocytes (primary and secondary) and spermatids were significantly reduced (P£ 0.001; 83.57%, 89.69% and 69.47% respectively). The tota...

OBJECTIVE This ex vivo study evaluated the effect of pre-flaring and file size on the accuracy of the Root ZX and Novapex electronic apex locators (EALs). MATERIAL AND METHODS The actual working length (WL) was set 1 mm short of the apical foramen in the palatal root canals of 24 extracted maxillary molars. The teeth were embedded in an alginate mold, and two examiners performed the electroni...

OBJECTIVES During root canal preparation, apical extrusion of debris can cause inflammation, flare-ups, and delayed healing. Therefore, instrumentation techniques that cause the least extrusion of debris are desirable. This study aimed to compare apical extrusion of debris by five single-file, full-sequence rotary and reciprocating systems. MATERIALS AND METHODS One hundred twenty human mandi...

N ature has long been a rich inspiration for artists and poets and an endless source of wonder for biologists to understand its workings. For millennia, humans have also relied on natural products in medicine, buildings or clothing and nature has inspired numerous technological inventions, architecture and design. But it is only recently that human efforts to exploit the design and functions of...

BACKGROUND Arctium lappa L. root has traditionally been recommended as an aphrodisiac agent. It is used to treat impotence and sterility in China, and Native Americans included the root in herbal preparations for women in labor. However, its use has not been scientifically validated. The present study therefore investigated the effects of aqueous extract of Arctium lappa L. roots on sexual beha...

     The aim of this study was to assess the antibacterial activities of some medicinal plants extracts traditionally used in Iran. Hydroalcoholic extracts obtained from different parts of five plants including Rosmarinus officinalis L. (rosemary), Syzygium aromaticum L. (Clove)., Arctium lappa L. (Burdock) , Coriandrum sativum, Myrtus communis with ...