Showing papers in "Journal of Endodontics in 1988"

TL;DR: The Nitinol files were found to have two to three times more elastic flexibility in bending and torsion, as well as superior resistance to torsional fracture, compared with size #15 stainless steel files manufactured by the same process.

TL;DR: Root canal therapy was performed on posterior teeth in monkeys using gutta-percha and various sealers for obturation and the presence of dye in teeth in all groups with no significant differences among the groups.

TL;DR: Apparently, long-term treatment with Ca(OH) 2 can dissolve necrotic tissue and pretreatment with Ca-OH- 2 can enhance the tissue dissolving effect of NaOCl.

TL;DR: Some factors, such as age, sex tooth type, presence of preoperative pain, existence of allergies, absence of periapical lesions, sinus tract stomas, retreated cases as well as those receiving prescribed analgesics, had significant effects on the incidence of endodontic interappointment emergencies.

TL;DR: The significance of restorations and canal obturation in relation to endodontic retreatment is discussed and guidelines for the treatment planning of retreatment are suggested.

TL;DR: Scanning electron microscopic observations revealed that there was no difference in cleanliness between the two groups of teeth studied and cavitation might have resulted in the formation of pits in some of the canals and should not be regarded as an important mechanism in debridement.

TL;DR: The canal configuration of 75 extracted mandibular second molars was categorized using radiographs from two directions with files in place at working length to determine type I, II, and III teeth.

TL;DR: The combination of hydrogen peroxide and acid etching resulted in an enamel surface that displayed more precipitate and appeared to be more porous than enamel surfaces used as controls and the significance of these findings relative to the adhesion of dental materials to bleached enamelsurface is discussed.

TL;DR: There was a trend for Flex-R files using the “balanced force” technique to remain centered in the canals, and there was less overall dentin removed with the step-back method.

TL;DR: Investigation of the release of calcium and hydroxyl ions from three root canal sealers by extraction with water found the alkalinizing potential was more durable in all three, and disintegration of the pellets of Sealapex indicated that solubility may be the price for increased activity.

TL;DR: The high prevalence of fusion of roots in this sample of Chinese teeth emphasizes the way in which racial divergence may have a direct influence upon the endodontic morphology of the teeth of the adult dentition.

TL;DR: A case report is presented concerning a maxillary first molar with six canals that is unique because it is characterized by two canals in the mesiobuccal root, two in the distobuccals root, and three in the palatal root.

TL;DR: A slight long-term tissue response was noted for polymeric resin-based materials; zinc oxide-eugenol-based sealers gave a stronger reaction; and a chloroform-based and two paste-type materials caused the least favorable reactions.

TL;DR: The response of sensory nerve fibers to inflammation was studied in the pulp and periapex of 64 injured molars from 16 adult rats and the active role of calcitonin gene-related peptide fibers in neurogenic inflammation and dental pathosis is discussed.

TL;DR: The incidence, possible modes of development, composition, and clinical significance of calcified structures in human dental pulps are reviewed.

TL;DR: Two new Ca(OH) 2 -based sealer cements, CRCS and Sealapex, were compared with Procosol cement for compressive strength, setting time, solubility, dimensional stability, and radiopacity.

TL;DR: The microleakage allowed by three temporary endodontic restorative materials was measured and evaluated and Cavit, IRM, or TERM provided leakproof seals while IRM demonstrated significant microleaks at 7 days and after thermal stress.

TL;DR: It is considered that more extensive experiences will be necessary prior to extrapolating these findings to the actual clinical situation after the biocompatibility of two calcium hydroxide-based endodontic sealers was investigated.

TL;DR: Three clinical cases are presented demonstrating the viability of using hemostatic agents in providing a matrix for the correction of furcal or post perforations and for obturating teeth with large apical foramina.

TL;DR: In this article, the influence of 18 radiographic features on the consistency and reliability of interpretation of the periapical region was investigated, and the results indicated that the pattern, size, and density of bone trabeculae are the best radiographic feature for identifying healthy and pulp diseased (vital and nonvital pulps) teeth.

TL;DR: The vertical crown root fracture that necessitated extraction of this molar was discussed and the incorporation of “Why?” into the diagnostic thought process was encouraged.

TL;DR: A statistical analysis was conducted on K files disposed of at my clinic, with the results showing that breakages were concentrated among specific K file numbers, and metal fatigue was found to be deeply implicated.

TL;DR: The purpose of this study was to compare the relative effectiveness of three methods of endodontic instrumentation in vitro: hand instrumentation with K and H files, the Burns unifile, and ultrasonic instrumentation.

TL;DR: A study was undertaken which evaluated, under identical culture conditions, the cytotoxicity of seven common endodontic sealers after they had been prepared for the experiment in a variety of ways.

TL;DR: Ultrasonic endodontics, with either a continuous flow of irrigant or an intermittent irrigant flush, was carried out on teeth with a mature or immature root canal wall, finding that the thickness of the root Canal wall had an effect on the rate of temperature change rather than the final temperature.

TL;DR: The percentage of spirochetes as seen by darkfield microscopy may be of value in the differential diagnosis of periodontal and endodontic abscesses.

TL;DR: The prevalence of pulp stones was evaluated radiographically in 515 randomly selected 13- to 14-yr-old Iraqi secondary school children and the first molar tooth showed statistically more pulp stones than second molars and premolars in both jaws in both sexes.

TL;DR: Compared with calcium hydroxide, the 50% tricalcium phosphate plus 50% hydroxylapatite compound provides the best dentinogenetic effects, resulting in a thicker reparative dentin bridge and quicker formation of normal tubular dentin.

TL;DR: The purpose of this study was to evaluate the anesthetic efficacy of the periodontal ligament injection in human maxillary and mandibular teeth, with an electric pulp tester, and the success rate of profound pulpal anesthesia was highest in the molar and premolar teeth, and lowest in theMandibular lateral incisors.

TL;DR: This study examined the irrigation patterns of K-type endosonic files in 20 straight and 20 curved artificial canals and found the #15 file required the greatest time for penetration in all groups and straight canals required longer instrumentation times for complete irrigant penetration when compared with curved canals.