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At least 19 recordsLinked to original sources
PubMed1979

Analysis of the use of Dycal with gutta-percha points as an endodontic filling technique.

The use of Dycal combined with gutta-percha cones as a permanent root canal filling material was analyzed. The following experiments were performed: 1. In vitro microscopic analysis of Dycal's adaptation in the dentin wall--gutta-percha cone interphase. 2. Study of the duration period of alkalinity. 3. Clinical and radiograhic posttreatment, inspection and evaluation, and follow-up. The results obtained in these studies showed: 1. There was correct adaptation and adherence of the material. 2. The alkalinity persisted up to 8 months after mixing. 3. There was clinically good postoperative tolerance. 4. Clinical and radiographic success was found in 90 percent of the cases in the treatment of normal vital pulps, vital inflamed pulps, and pulpless teeth with or without areas.

Calcium Hydroxide↗
PubMed1977

Effect of aging on the mechanical properties of hand-rolled gutta-percha endodontic cones.

This study examined the effect of storage, for periods varying up to 24 weeks and at temperatures from -12 degrees C. to 50 degrees C., on the compression, tension, torsion, and bend properties of size 100 hand-rolled gutta-percha cones. All of the properties changed during storage, with the largest changes occurring at the highest temperatures, the smallest changes occurring at the lowest temperatures, and the greatest rate of change occurring during the initial 40- to 60-day storage period. All of the cones tested were subjectively found to be clinically usable. Since ideal characteristics or standards for mechanical properties are nonexistent, assessment of the changes is speculative and arbitrary. The condition of cones at which clinicians decide they are unusuable also varies widely. Continual study of this problem is indicated and important.

Elasticity↗
PubMed1975

The sterilization of gutta-percha points.

The traditional methods employed for the sterilization of gutta-percha points are unsatisfactory. The use of propylene oxide for this purpose is described and experimental evidence is advanced to support this use.

Bacillus subtilis↗
PubMed1977

Cold sterilization of gutta-percha cones with formocresol vapors.

Cold sterilization of gutta-percha cones was accomplished by exposing them to formocresol vapors for 16 hours. The data obtained from this in vitro study indicate that gaseous sterilization with formocresol vapors is effective against a variety of gram-positive, gram-negative, and spore-forming microorganisms.

Bacteria↗
PubMed1975

Comparison of apical sealing methods. A preliminary report.

A comparison of the seal provided by gutta-percha root canal filling, heat-sealed gutta-percha, retrograde amalgam filling, and retrograde Durelon filling was made by observation of dye penetration around the above filling materials in extracted teeth. A small but not significant difference between gutta-percha, heat-sealed gutta-percha, and retrograde amalgam was noted. Retrograde Durelon filling gave a poor seal in comparison to gutta-percha and retrograde amalgam filling, but the difference between it and the heat seal was not significant.

Apicoectomy↗
PubMed1977

A comparative study of five materials for use in filling root canal spaces.

The purpose of this study was dual: (1) to test the adaptation of various filling materials to the walls of instrumented root canals and (2) to test which of the experimental materials can be utilized with the pressure syringe. The root canal spaces of 210 extracted permanent anterior teeth were instrumented and, with the pressure syringe, the canals and access cavities were filled with a sealer or cement. Teeth filled with laterally condensed gutta-percha and sealer, and with a silver cone plus laterally condensed gutta-percha and sealer served as the controls. Except for the apical openings, the roots were coated with sticky wax and then placed in methylene blue dye at 37 degrees C. for periods of 1 day, 1 week, and 1 month. The teeth were removed from the dye and sectioned longitudinally, and the length of the dye penetration between the filling and the canal wall was measured. Of all materials tested, the silver point control exhibited the least amount of marginal seepage at each time period. AH-26 exhibited the least amount of marginal seepage after 30 days as compared to the other experimental materials and the gutta-percha control, and was the easiest material to handle of all those tested. Since gutta-percha has been shown to be clinically successful, and since it did not differ significantly in dye seepage from the other materials, all materials tested will give a satisfactory result up to 30 days when used as a root canal sealer under these testing conditions.

Acrylic Resins↗
PubMed1977

In vivo study of temporary filling materials used in endodontics in anterior teeth.

The sealing efficacy of temporary endodontic filling materials was tested in vivo. The following materials were studied: Cavit, Caviton, gutta-percha, three types of zinc phosphate cement, and zinc oxide and eugenol. All the materials were tested in the access cavity of the same anterior tooth in ten different patients for a minimum of 1 week. Seepage was determined bacteriologically by culturing a cotton pellet which was sealed into the access cavity. On the basis of the quantity of microorganisms grown anaerobically, differentiation was made between no leakage, minor leakage, and gross leakage. Findings with Cavit and Caviton are essentially the same and show no or minor leakage in the vast majority of tests. Gutta-percha showed gross leakage in six out of eight tests. Phosphate cements showed no leakage in more than two thirds of the tests.

Bacteria↗
PubMed2026

Outcomes and Associated Prognostic Factors for Orthograde Canal Obturation Using Ortho MTA III: A Randomised Prospective Clinical Trial.

AIM: To prospectively compare treatment outcomes for orthograde canal obturation using Ortho MTA III (OMTA) with the continuous wave of compaction (CWC) using gutta-percha (GP) and AH Plus sealer, and to identify associated predictive factors. METHODOLOGY: Informed consent was obtained (110 patients), and single- or two-rooted permanent teeth (n&#x2009;=&#x2009;120) diagnosed with pulp necrosis (or previously treated) and asymptomatic apical periodontitis or chronic apical abscess (periapical index, PAI&#x2009;&#x2265;&#x2009;3) were randomly assigned to two groups (n&#x2009;=&#x2009;60/group). The canals were prepared to a minimal apical size #40 (ISO) based on their initial file size, disinfected and obturated by either CWC or OMTA using an enhanced disinfection protocol (GP disinfected, new gloves after each intraoperative radiograph and before starting obturation). Clinical and periapical radiographic examinations were conducted by two calibrated, independent endodontists during follow-up periods of at least 12&#x2009;months. Success rates and associated predictive factors (tooth-, operator- and patient-related) were analysed statistically using binary and multiple logistic regression (p&#x2009;<&#x2009;0.05). RESULTS: The median recall period was 30&#x2009;months (14-48&#x2009;months), and 104 teeth were finally analysed (recall rate: 86.67%). No significant differences in success rate were observed between the groups (p&#x2009;>&#x2009;0.05) under both loose (OMTA: 88.24%, CWC: 83.02%) and strict criteria (OMTA: 64.71%, CWC: 58.49%). Multivariate analysis revealed that age (OR&#x2009;=&#x2009;5.735, 95% CI: 1.286-25.577, p&#x2009;=&#x2009;0.022), periapical lesion size (OR&#x2009;=&#x2009;6.596, 95% CI: 1.397-31.138, p&#x2009;=&#x2009;0.017) and PAI score (OR&#x2009;=&#x2009;2.081, 95% CI: 1.047-4.136, p&#x2009;=&#x2009;0.036) were significant predictors of treatment failure. CONCLUSIONS: Orthograde obturation of infected canals with Ortho MTA III demonstrated comparable success and treatment outcomes to those filled with GP and sealer by CWC, supporting its potential as a clinically viable alternative for the obturation of infected root canals. TRIAL REGISTRATION: cris.nih.go.kr registration number: KCT00099939.

Humans↗
PubMed1975

Some unusual cases of apexification subsequent to trauma.

Three cases are reported in which apexification occurred without the benefit of endodontic treatment. These reports illustrate that immature teeth which are avulsed and replanted, dislocated and repositioned, or traumatized with pulp necrosis supervening, may progress to form complete apices without intracanal therapy. The value of using calcium hydroxide is not in question, but may not be as essential an aid to apical closure as was previously thought. In one case, the appearance of isolated apixes forming, deep in the bone after loss of very immature lateral incisors poses the question of whether this event does not occur more frequently after extraction of newly erupted or young impacted teeth.

Adolescent↗
PubMed1979

Response of periapical pathosis to endodontic treatment in monkeys.

Response of induced periapical lesions in monkeys to a conventional endodontic technique was investigated at varying periods ranging from 15 to 365 days after treatment. The findings indicate that response to treatment is influenced by the extent of the root canal filling, the time lapse between treatment and death, and the presence or absence of bacteria in the apical portion of the canal.

Animals↗