Search PubMed⌕ Search

Biomedical subjects

E J Hovland

Publications and source records attributed to E J Hovland.

At least 19 recordsLinked to original sources
PubMed1995

Evaluation of long-term calcium hydroxide treatment in avulsed teeth--an in vivo study.

Calcium hydroxide has been advocated for use in avulsed teeth as a temporary dressing in an attempt to prevent or inhibit external resorption. However, there have been no long-term histological studies that have examined gutta-percha versus calcium hydroxide treatment in avulsed teeth. The purpose of this study was to determine the long-term therapeutic effect of calcium hydroxide therapy in avulsed teeth. Six adult macaca monkeys were anesthetized and all four maxillary incisors were extracted and bench-dried for 25 min. The teeth were replanted and splinted with composite for approximately 2 weeks. Each animal served as its own control and the teeth were accessed, instrumented, and filled with either Ca(OH)2 or gutta-percha and AH26 cement. All access openings were filled with composite. The Ca(OH)2 was replaced twice during the experimental period (approximately every 8 weeks). The animals were killed between 5 and 7.5 months post-avulsion. The teeth were removed, sectioned, and examined histologically by two examiners. The results of the histological evaluation of external resorption indicated that there were no statistically significant differences in resorption indices between the teeth obturated with gutta percha or with calcium hydroxide (P > 0.05). Replacement resorption was the primary cause of root destruction and only a few histological sections exhibited evidence of inflammatory resorption.

Animals↗
PubMed1995

Clinical management of crown fractures.

Contemporary treatment of uncomplicated and complicated crown fractures is presented in this article. New concepts and approaches are discussed in relation to modern research and new restorative materials. Practical suggestions for the recognition and clinical management of various types of crown fractures are described.

Dental Enamel↗
PubMed1992

Horizontal root fractures. Treatment and repair.

When root-fractured teeth are treated adequately with repositioning, stabilization, and occlusal adjustment the prognosis for healing is favorable. The common sequelae of root canal obliteration and transitory resorption are usually of little clinical concern. The sequelae of pulpal necrosis usually can be treated successfully by endodontic therapy or surgery. Even with the loss of the fractured crown the root often can be restored with the assistance of the modern techniques of extrusion or periodontal surgery. The prognosis for tooth survival following a horizontal root fracture can be summarized as quite good.

Humans↗
PubMed1990

An evaluation of the Apex Locator Endocater.

The purpose of this study was to relate the relationship of the apical constriction to the anatomical apex and to determine the ability of the Endocater (Hygenic Corp., Akron, OH), using commercially bonded coated probes to locate the position of the apical constriction, in permanent teeth that were intact and had not been subjected to previous endodontic manipulation. Using local anesthesia and rubber dam isolation, conventional access cavities were prepared at ultra high speed with water coolant in teeth treatment planned for extraction. The Endocater was used to determine the working length. The probes were sealed in place with autopolymerizing composite resin and the teeth extracted. The teeth were sectioned buccolingually, and the position of the probe in relation to the anatomical apex and apical constriction was measured with the use of an ocular microscope. In 17.1% of the canals, the probes bound in the coronal portion of the canals and would not reach the apical portion of the root. In those teeth in which the probes reached the apical portion of the root, the Endocater was able to locate the apical constriction within 0.5 mm in 93.4% of the canals.

Dental Pulp Cavity↗