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Biomedical subjects

E J Neaverth

Publications and source records attributed to E J Neaverth.

14 recordsLinked to original sources
PubMed1991

Chairside disinfection of radiographs.

Routine disinfection of materials that have contacted human blood products and body fluids during patient care is recommended by the American Dental Association and the Centers for Disease Control. The purpose of this study was to determine whether surface disinfection with sodium hypochlorite would be an effective means for disinfection of radiographic film packets used in chairside developers. Disinfection of exposed radiographic film packets for 30 seconds in 5.25% sodium hypochlorite has been found to be a simple procedure suitable for routine use. A suggested disinfection protocol for the use of chairside developing boxes is described. This procedure should be considered for adoption as an infection control guideline.

Communicable Disease Control↗
PubMed1991

Effect of coronal-radicular flaring on apical transportation.

The purpose of this study was to evaluate the effect early and late radicular flaring has on apical canal transportation when using balanced force instrumentation. Sixty-six extracted human teeth with curvatures ranging from 20 to 65 degrees were equally divided into two groups. Canals were cleaned and shaped using balanced force and one of two flaring techniques. A pre- and postoperative double exposure radiographic technique was used to evaluate apical canal transplantation. While early radicular flaring made instrumentation much easier, no significant differences were found when comparing apical transportation between the two experimental groups.

Dental Pulp Cavity↗
PubMed1990

A serious complication following the inadvertent injection of sodium hypochlorite outside the root canal system.

During an attempt to negotiate a calcified root canal in a maxillary lateral incisor, a midroot distobuccal perforation was created, and sodium hypochlorite (NaClO) was extruded through the opening into the supporting tissues. This procedural accident caused an immediate burning sensation, severe pain, and marked facial swelling, with the subsequent loss of the tooth.

Calcinosis↗
PubMed1989

A dye penetration study of retrofilling materials.

The apical sealing ability of amalgam, cold-burnished gutta-percha, amalgam with cavity varnish, and SuperEBA cement was evaluated in extracted human teeth. For each experimental group, the roots of 20 single-rooted teeth were sectioned from their crowns. Canals were cleaned, shaped, and obturated with vertically condensed warmed gutta-percha and Kerr Pulp Canal Sealer. Following apical preparation and placement of test materials, root ends were placed in 1% methylene blue dye for 2 wk, after which the roots were sectioned longitudinally, and linear measurements of dye penetration were recorded. Results demonstrated statistically less linear dye penetration in the test group sealed with amalgam and cavity varnish. Statistical differences were not detected among the other test groups.

Dental Amalgam↗
PubMed1989

A comparison of Flex-R files and K-type files for enlargement of severely curved molar root canals.

A double exposure radiographic technique is introduced and used to evaluate the magnitude of apical canal transportation that occurs during preparation procedures. The balanced force technique and a step-back method for cleaning and shaping root canals were evaluated in mesiobuccal root canals from 80 extracted human molar teeth with curvatures ranging from 30 to 73 degrees. Pre- and posttreatment file positions were examined from clinical and proximal radiographic views by computer digitization. Statistical analysis indicated significantly less apical transportation with the use of the balanced force technique when compared with a step-back technique in canals exhibiting both more and less than 45 degrees of curvature.

Dental Pulp Cavity↗
PubMed1989

Endodontic access: an update, Part II.

Part two of the series on root canal access discusses treatment of the premolars and the mandibular and maxillary molars, and offers additional treatment recommendations.

Bicuspid↗
PubMed1980

Technique and rationale for splinting.

Stabilizing teeth after impact injuries is an essential consideration in endodontic therapy. The basic method of treating avulsed, luxated, or fractured teeth should incorporate the orthodontic wire and the acid-etch splinting system. In some particular situations, a simple donut splint, a cross-suture sling, and cemented occlusal acrylic splint have been more useful. All of the splints are economical, efficient, and easy to use in the emergency treatment of injuries.

Acid Etching, Dental↗
PubMedDate not supplied

Use of verbal descriptors, thermal scores and electrical pulp testing as predictors of tooth pain before and after application of benzocaine gels into cavities of teeth with pulpitis.

A double-blind pilot study was conducted on 27 consenting human volunteers who had irreversible pulpitis associated with persistent toothache pain from open carious lesions. Formulations tested contained either 0, 10%, or 20% benzocaine and were identified only by a numbered code. Before the experiment started, a small amount of a known 5% benzocaine gel was placed for 1 minute on the tongue of each patient to assure a sensation of numbness within the oral cavity. Then the test tooth was washed with a gentle stream of warm water and dried with gauze. A randomly selected test medication was placed into the open cavity and around the gingival margins for 5 minutes. Pre- and posttreatment tests were conducted at the following timed intervals: 0, 5, 15, 30, 45, 60, 75 and 90 minutes. The tests included degree of pain (rated: 0 = none, 1 = mild, 2 = moderate, 3 = severe); electrical pulp testing (EPT) by a modified, voltage-ramping instrument; and ice water testing (0.5 mL directed quickly onto sound enamel of the tooth and rated: 0 to 4, with 4 being intolerable). After testing, or when pain returned to baseline, endodontic procedures were performed. There was a significant increase (p < 0.032, Fisher exact test) in subjects obtaining pain relief, rated by verbal descriptors, from the benzocaine gels (14 out of 18 improved) compared to placebo (3 out of 9 improved). It was concluded that: 1) benzocaine gels are effective formulations for temporary relief of toothache pain, 2) there were no statistical differences in EPT scores between teeth having pulpitis and control teeth, 3) there were no correlations between direction of EPT scores and pain relief, 4) cold water testing was a good predictor of whether or not a tooth had pulpitis, and 5) changes in cold water testing scores after treatment could not be correlated to relief of pain according to verbal descriptors. The effectiveness of benzocaine in relieving toothache pain verifies previous studies; however, a difference between 10% and 20% benzocaine could not be demonstrated probably because of two factors: 1) the present experiment had a small sample size, and 2) there was no direct measurement of duration of local anesthesia.

Adult↗