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At least 325 records · Page 18Linked to original sources
PubMed1978

New chemotherapeutic agent for root canal treatment. A preliminary electron microscopic study on an in vivo and in vitro endodontically treated tooth.

A preliminary in vivo and in vitro electron microscopic study of root canals treated endodontically with EDTA-C and Salvizol proved the latter to be superior as a chemomechanical and irrigation solution, especially in the apical third of the roots. A further virtue of Salvizol, as has been demonstrated, is its capability to dissolve the organic matrix of dentin, thus exposing the mineralizing front and the patent tubules even in the apical third of the canal. The combined properties of Salvizol which introduce it as a chemotherapeutic agent for endodontics are: (1) broad spectrum of bactericidal activity, (2) ability to dissolve calcium, (3) neutral pH, (4) cleansing potency, and (5) biologic compatibility.

Dental Pulp Cavity↗
PubMed1978

Dens evaginatus (tuberculated cusps): genetic and treatment considerations.

This report documents the occurrence of a rare dental anomaly, dens evaginatus, in several members of a family of Guatemalan Indian descent. Previous reports on this anomaly reveal that the majority of cases have occurred in persons of Mongoloid extraction. These same reports have suggested a genetic component in the etiology of the anomaly, with most cases, however, occurring randomly. This is the first report in which the trait has been reported in successive generations. The precise mechanism of genetic transmission is still not entirely clear, although autosomal dominant inheritance is probable.

Bicuspid↗
PubMed1979

Antimicrobial effectiveness in endodontic therapy using formocresol and two new alcoformal agents. Mechanical preparation during the second visit.

Antimicrobial effectiveness of alcoformol two agents (AF 8.85 and AF 3.5) was studied in a clinical trial by means of bacteriologic examination of the root canals. After the initial culture was taken, one of the disinfectants was sealed in the pulp chamber for one week. At the second visit, the root canal was reamed and a second culture was taken. It was found that AF containing 3.5 percent formaldehyde is a satisfactory disinfectant for root canals of vital teeth. A concentration of 8.75 percent was needed for disinfection of teeth with necrotic pulps.

Anti-Infective Agents, Local↗
PubMed1979

Antimicrobial effectiveness in endodontic therapy using formocresol and two new alcoformol agents. Mechanical preparation during the first visit.

Antimicrobial effectiveness of two alcoformol agents (AF 8.75 and AF 3.5) was studied in a clinical trial by means of bacteriologic examination of the root canals. After the initial culture was taken, the root canal was reamed and a second culture was taken. One of the disinfectants was sealed in the pulp chamber for one week. At the second visit, a third culture was taken. No statistically significant differences were found between the effectiveness of the disinfectants; the cumulative effect of mechanical preparation and disinfection was such that initially positive teeth did not differ significantly from initially negative teeth when treated by this procedure.

Anti-Infective Agents, Local↗
PubMed1980

Chelation in root canal therapy.

The effectiveness of three chelating agents (EDTA, Rc-Prep, and Salvisol) in achieving cleanliness of prepared and unprepared root canal surfaces was evaluated by means of the scanning electron microscope. In unprepared root surfaces Salvisol (solution) has the best chelating effect. In the instrumented group, EDTA was the most effective agent.

Animals↗
PubMed1980

Periapical response to dentin filings. A pilot study.

Vital maxillary canines of mature cats were intentionally instrumented through the foramen with No. 50 K-files. Dentin chips were packed into the apical opening in one tooth of each animal. In the contralateral tooth a dentin plug was not formed. Both root canals were then filled with gutta-percha. The animals were sacrificed at 3, 5, and 8 months. The results showed quicker healing characterized by minimal inflammation and cementum deposition in the specimens where dentin fillings were packed.

Animals↗
PubMed1980

Successful apexification technique in an immature tooth with dens in dente.

This is the first case report which documents the successful treatment by apexification of an immature permanent tooth with dens in dente. The patient, an 11-year-old boy in good health, presented with unilateral facial swelling and a "sore tooth." Clinical and radiographic examination revealed a partially erupted anomalous permanent canine with a radiolucent periapical area. After initial management with antibiotics, the anomalous structure within the canine was removed. Calcium hydroxide dressings were placed to facilitate apical closure. After 1 year the canal was filled with gutta-percha using a lateral condensation technique.

Child↗
PubMed1981

The use of dequalinium acetate as a disinfectant and chemotherapeutic agent in endodontics.

Dequalinium compounds are known as chemotherapeutic and bactericidal agents. They are used in various areas of medicine and oral medicine for combating cases of mixed infections. Until now, results of basic research studies have been published whose objective was to examine the suitability of dequalinium preparations as cleansing agents and intracanal dressings for endodontic use. This article presents for the first time a number of selected cases from a clinical research study in which widespread periapical lesions revealed before the start of treatment were treated with a preparation whose active ingredient was dequalinium acetate. The results of treatment and follow-up are given. These case reports show that healing of the periapical lesions occurs relatively quickly and is generally completed within a period of 9 months.

Adult↗
PubMed1982

An evaluation of a new mechanized endodontic device: the Endolift.

Four methods of canal preparation are tested: hand instrumentation with preflaring and step back, Giromatic, Union Broach Endo Angle, and the Kerr Endolift. The preparations are analyzed with plastic blocks and extracted human teeth. Hand instrumentation with preflaring and step-back is superior to and safer than the mechanized endodontic devices. With proper care and technique, some mechanized endodontic devices can produce adequate canal preparations.

Equipment Design↗
PubMed1983

Spectrophotometric analysis of microleakage in the fine curved canals found in the mesial roots of mandibular molars.

Mesial roots from forty human mandibular first and second molar teeth were randomly assigned to two groups and obturated with laterally condensed gutta-percha or silver cones. Each group was divided into two subgroups. The first subgroup for each group consisted of specimens that had two canals with a common foramen. The second subgroup consisted of specimens with two canals and separate foramina. All specimens were obturated and exposed to 2 percent methylene blue dye at 37 degrees C. for a period of 30 days. A dye-recovery, spectrophotometric method was used to evaluate the apical microleakage. Results indicated no statistically significant difference in leakage between the groups or subgroups.

Dental Leakage↗
PubMed1989

Sealing root canals with low-viscosity resins in vitro: a scanning electron microscopy study of canal cleansing and resin adaption.

Low-viscosity resins of the fissure sealant type have been suggested in the literature as having potential for use as root canal filling materials. A low-viscosity resin may seal a root canal by flowing into clean dentinal tubules after smear layer removal. This investigation with scanning electron microscopy examines the efficacy of two methods of root canal preparation and the effectiveness of different chemicals on smear layer removal. Ultrasonic preparation with 0.25% sodium hypochlorite solution and final agitation with 50% citric acid solution were found to produce a very clean canal wall, free of smear layer in coronal and middle parts. However, low-viscosity resin used in conditions that aimed to simulate in vivo conditions failed to penetrate open dentinal tubules to a significant extent. On the basis of these observations made with scanning electron microscopy, low-viscosity resins would not seem suitable as root canal filling materials, because they are unlikely to form a satisfactory adaption to the canal wall. In addition, if treatment fails, these resins are impossible to remove from a root canal without much destruction of tooth substance.

Citrates↗