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Biomedical subjects

J L Gutmann

Publications and source records attributed to J L Gutmann.

At least 19 recordsLinked to original sources
PubMed1992

The dentin-root complex: anatomic and biologic considerations in restoring endodontically treated teeth.

The restoration of endodontically treated teeth has been the focus of considerable controversy and empiricism. Time-tested methods have been highly successful in some respects, but failures are still apparent. The inherent causes of failure are rarely evaluated and the limitations of specific restorative systems are seldom identified. Regardless of the system, there should be a thorough understanding of the anatomy and biology of the dentin and root supporting the restoration on the part of the practitioner, because both endodontic and restorative procedures alter the hard tissues.

Biology↗
PubMed1992

Contemporary perspectives on canal obturation.

The astute practitioner must recognize that no one particular obturation technique will satisfy the myriad of clinical cases that require endodontic therapy. The obturation method selected, whether it be a conventional method or one of the contemporary ones, must be consistent with the overall goals of clinical practice; i.e. to provide the best possible care for our patients. Although all obturation techniques have their advantages as well as their disadvantages, the clinician should be open-minded enough to accept and master a number of obturation techniques and not just focus on one. At the same time, he or she should be able to provide a biologically sound rationale for the method he or she chooses. In time, this philosophy will generate dental practitioners who can not only solve problems but who can also think critically.

Humans↗
PubMed1992

Clinical, radiographic, and histologic perspectives on success and failure in endodontics.

There is a tremendous impact of multiple variables on the decision-making process in determining success or failure. The best approach to quality outcomes is to minimize the variables that can affect case adversity. Therefore, it behooves the clinician, who chooses to do endodontic therapy, to fully understand the level of treatment that is necessary to achieve success and to attain that level on a consistent basis. Additionally, the wise and prudent clinician should be able to assess completed treatment, with the proper integration of clinical and radiographic factors, in an environment that minimizes the shackles of bias and the dictates of cognitive dissonance.

Decision Making↗
PubMed1991

Revisiting the post puller.

The removal of an intraradicular post is frequently part of retreatment and the fabrication of a new coronal restoration. This article highlights the use of a post puller for safe and effective removal of an intraradicular post in conjunction with retreatment.

Dental Debonding↗
PubMed1991

Perspectives on periradicular healing using Sealapex: a case report.

The use of the calcium hydroxide-containing root canal sealer, Sealapex, has been questioned regarding its predisposition to solubility and subsequent effect on the root canal seal and periradicular healing. This case report demonstrates, radiographically, dissolution of excess sealer in the periradicular tissues with subsequent osseous repair which was similar to healing in periradicular tissues where there was no extruded sealer.

Adolescent↗
PubMed1990

Bactericidal effects of human neutrophils and sera on selected endodontic pathogenic bacteria in an anaerobic environment.

Phagocytosis by normal human neutrophils and the bactericidal activity of normal human pooled serum were measured under anaerobic conditions on six endodontic pathogenic bacterial species from the genera Actinomyces, Bacteroides, Fusobacterium, Peptostreptococcus and Streptococcus. The results revealed that Actinomyces viscosus was not killed either by human neutrophils or by 20 per cent serum; Peptostreptococcus anaerobius was not killed by either 20 per cent or 95 per cent serum; and Bacteroides intermedius was susceptible to both 20 per cent and 95 per cent serum, but was not killed by neutrophils after exposure for 20 minutes. The other species showed intermediate susceptibility patterns. Such results suggest that oral pathogens vary with regard to the bactericidal effects of these two host defense mechanisms, and that this variation may at least in part explain the relative quantities of microbes recovered in certain oral infections.

Actinomyces↗
PubMed1979

Simplified method for removing intraradicular posts.

A technique for post removal prior to endodontic or restorative retreatment procedures has been presented. This simplified procedure is not only highly efficient, but also reduces or eliminates risks encountered in other treatment modalities.

Crowns↗
PubMed1978

Prevalence, location, and patency of accessory canals in the furcation region of permanent molars.

One hundred and two extracted permanent molars were debrided in 3% H2O2, sealed at the apex, and placed in a vacuum chamber. Safranin dye was introduced into the teeth that were placed in a vacuum of 525 mm of Hg. Observations were made of the external root surface to determine any staining due to patent accessory canals. Accessory canals were demonstrated in the "furcation region" in 28.4% of the total sample; 29.4% in mandibular molars, and 27.4% in maxillary molars. Of the total sample 25.5% exhibited canals in the "furcation" only, while 10.2% exhibited canals on the lateral root surface. Communication between the pulp chamber and the external surface was noted via dentinal tubules, especially when the cementum was denuded. The salient biologic and pathologic ramification of these aberrant canals were discussed along with the need to establish a differential diagnosis in order to determine the proper sequence of treatment should pulpal-periodontal disease exist.

Dental Pulp Cavity↗