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Biomedical subjects

H R Stanley

Publications and source records attributed to H R Stanley.

At least 55 records · Page 3Linked to original sources
PubMed1983

The detection and prevalence of reactive and physiologic sclerotic dentin, reparative dentin and dead tracts beneath various types of dental lesions according to tooth surface and age.

The pulpo-dentinal complex responds to external injuries with dentin sclerosis (DS), dead tracts (DT), or reparative dentin (RD). This investigation correlates the prevalence of these responses with age, sex, type and surface location of tooth lesions (caries, restorations, attrition, abrasion and erosion) utilizing ground sections, microradiographs and decalcified paraffin-embedded tooth sections treated with the Pollak trichrome stains (270 teeth from 113 patients). The main response to caries, restorations and erosion was DS, followed by RD and DT. DS, RD and DT occurred equally in any tooth, on any tooth surface and even beneath the same lesion. DS did not necessarily prevent RD. Root and furcation DS and RD in the floor of the pulp chamber and root canals were unrelated to particular lesions but did relate to increasing age. Root DS extended from apical to cervical area with increasing age. Beneath caries and restorations DS and RD were more prevalent in males, but DT was more prevalent in females. Pollak staining of decalcified paraffin sections for DS was approximately 80% as accurate as ground sections and microradiography. In pulp studies, where the result is contrary to previous experience, the Pollak stains reveal whether DS has decreased dentin permeability.

Adolescent↗
PubMed1980

Detecting dentinal sclerosis in decalcified sections with the Pollak trichrome connective tissue stain.

The supply of young human teeth for controlled human pulp studies is inadequate. Dentinal sclerosis in older teeth modifies the expected pulpal responses. Decalcification, necessary to interpret pulpal responses, destroys the primary evidence of sclerosis. At present we are unable to detect the degree of sclerosis and the pulp response in the same preparation. Valid interpretations on older teeth cannot be accomplished until this problem is resolved. Fifty-seven teeth, normal and carious, representing a wide age span were fixed, embedded in Bioplastic and sectioned with the Bronwill Model No. 77 through the middle of the M-D plane on the labio-lingual plane to obtain an undecalcified ground section for examination with reflected and transmitted light and Faxitron 805 microradiography. The remaining portions of the tooth were decalcified, processed in paraffin and subjected to a variety of histochemical reactions including the Pollak trichrome stain. The Pollak trichrome and the Pollak trichrome solution No. 6 modification stains provided the greatest correlations with the sclerotic areas in the radiographs of the ground sections. Areas of dentin indicative of sclerosis prior to decalcification stained orange-red with the Pollak trichrome stain and deep orange with the Pollak trichrome solution No. 6 modification.

Dentin↗
PubMed1978

Human pulp response to a new composite system. Vytol composite restorative and bonding agent.

A new two-paste composite system (Vytol and Vytol Bonding Agent) was evaluated to establish its level of pulpal response in human teeth and to determine whether a calcium hydroxide base is required. Class V cavity preparations were cut in seventy-two teeth of ten male patients whose ages averaged 52.5 years. The teeth were restored and extracted at 1 to 7 days, 12 to 14 days, and 47 to 56 days. Histologic evaluation indicated that the unlined Vytol System reacted very similarly to other commercially available composite restorative materials and that a calcium hydroxide base is effective in reducing or eliminating adverse pulp responses.

Acid Etching, Dental↗
PubMed1978

Direct pulp capping treatment: a long-term follow-up.

In reviewing 356 instances of pulp capping during the past 25 years, 149 cases were recalled with posttreatment intervals greater than five years. One hundred thirty teeth (87.3%) were still vital and functioning with an average posttreatment interval of 11.7 years. The criteria for pulp capping procedures are in need of revision. Restrictions based on tooth size and age of the patient are unfounded.

Adolescent↗