Biomedical subjects

M D Peikoff

Publications and source records attributed to M D Peikoff.

11 recordsLinked to original sources

PubMed2001

Microleakage of root-end filling materials.

The purpose of this study was to evaluate the microleakage of various root-end filling materials using a fluid filtration system. Sixty extracted human single-rooted teeth were used. The crowns were removed, the canals prepared, and root-end fillings placed. The samples were divided into two control and five experimental groups. The root-end filling materials tested were: amalgam, Intermediate Restorative Material (IRM), a dentin-bonded resin, Super-EBA, and mineral trioxide aggregate. The results showed that amalgam root-end fillings demonstrated significantly more microleakage than Super-EBA, dentin-bonded resin, or mineral trioxide aggregate. There was no significant difference between amalgam and IRM. However IRM was also not significantly different from the other three groups. There were no significant differences between the other three groups.

Aluminum Compounds↗

PubMed1996

The maxillary second molar: variations in the number of roots and canals.

A retrospective study was undertaken of 520 completed endodontic treatments of maxillary second molar teeth which were selected from a specialty endodontic practice. Radiographs were reviewed and studied, a classification of antomical root and canal variations was devised, and the frequency with which each variant occurred was recorded. There were six variants which occurred frequently enough to be considered as separate anatomic categories and their frequency of occurrence is illustrated. The six variants found in the study and their frequency of occurrence are as follows: (1) three separate roots and three separate canals (56.9%); (2) three separate roots and four canals (two in the mesiobuccal root) (22.7%); (3) three roots and canals whose mesiobuccal and distobuccal canals combine to form a common buccal with a separate palatal (9%); (4) two separate roots with a single canal in each (6.9%); (5) one main root and canal (3.1%); and (6) four separate roots and four separate canals including two palatal (1.4%). Clinical examples of these deviant variations are also presented.

Dental Pulp Cavity↗

PubMed1994

Canal configuration in the mesiobuccal root of the maxillary first molar: a clinical study.

Surgical telescopes, headlamps, and a modified access preparation were used clinically to aid in the search for mesiolingual canals in the mesiobuccal roots of 208 maxillary first molars. In 148 (71.2%) of the mesiobuccal roots two canals were located and treated. Of these, 66 (31.7%) had two separate apical foramina (Weine Type III) and 82 (39.4%) had two canals that joined (Weine Type II). In 60 (28.9%) cases only one canal was located.

Adult↗

PubMed1993

Clinical observations on a newly designed electronic apex locator.

The introduction of alternative electronic principles and circuitry has produced the next generation of electronic apex locators, which have fewer clinical limitations and greater ease of use, on a routine basis, than their predecessors. The history of how the electronic apex locator was developed over the past 30 years and the limitations of the machines designed on earlier principles are reviewed. Clinical examples of root canal systems measured using a newly-designed, frequency-dependent apex locator are presented in order to illustrate the spectrum of cases that can be read. All measurements were made on canals irrigated previously with electro-conducting solutions, which would have made readings from earlier machines problematic. Single-rooted and molar teeth as well as teeth with vital tissue in the root canal system or with necrotic pulp tissue and periapical lesions have been treated with equal ease and results. The electronic apex locator is being advocated to supplement instrumentation technique and to improve the identification of the apical terminus of the root canal system. The routine use of these devices is advocated to ensure an accurate placement of root canal fillings rather than to eliminate the need for radiographs.

Dental Pulp Cavity↗

PubMed1991

Maxillary molars with two palatal roots: a retrospective clinical study.

Clinical records and radiographs were reviewed for 15 patients who had endodontic treatment performed on 16 maxillary molars with two palatal roots. These cases, plus six extracted teeth or slides, were evaluated. From the morphology of these roots, a classification of three types is proposed.

Dental Pulp Cavity↗

PubMed1985