Impression techniques for removable partial dentures.

W F Turbyfill

PubMed · 12016678

Impression techniques for removable partial dentures.

Abstract

This article concerns a subject that has been very perplexing to dentists attempting to provide superior removable prosthetic services. The techniques in this article have been developed, tried, and proven over 42 years of clinical practice. Adequate impressions for partial denture construction when crowns that have been fitted to the mouth are included as part of the master cast. The dilemma of having already cemented crowns with attachments on them can be a problem. An easy technique has been developed for analog production in these cases.

Explore related subjects

Alginates Crowns Dental Abutments Dental Impression Materials Dental Impression Technique Denture Design Denture Precision Attachment Denture, Partial, Removable Denture, Partial, Temporary Equipment Design Humans Models, Dental Patient Care Planning Journal Article

Keep this discovery

Explore connections, maps & timelines

BibTeX RIS

W F Turbyfill. Impression techniques for removable partial dentures.. https://pubmed.ncbi.nlm.nih.gov/12016678/

Cite the original work for its findings. Save a collection to share your selection of sources.

KEEP EXPLORING

Related citations

PubMed2003

Enhancing the vascularization of three-dimensional porous alginate scaffolds by incorporating controlled release basic fibroblast growth factor microspheres.

Site-specific delivery of angiogenic growth factors from tissue-engineered devices should provide an efficient means of stimulating localized vessel recruitment to the cell transplants and would ensure cell survival and function. In the present article, we describe the construction of a novel porous alginate scaffold that incorporates tiny poly (lactic-co-glycolic acid) microspheres capable of controlling the release of angiogenic factors, such as basic fibroblast growth factor (bFGF). The microspheres are an integral part of the solid alginate matrix, and their incorporation does not affect the scaffold porosity or pore size. In vitro, bFGF was released from the porous composite scaffolds in a controlled manner and it was biologically active as assessed by its ability to induce the proliferation of cardiac fibroblasts. The controlled delivery of bFGF from the three-dimensional scaffolds accelerated the matrix vascularization after implantation on the mesenteric membrane in rat peritoneum. The number of penetrating capillaries into the bFGF-releasing scaffolds was nearly fourfold higher than into the control scaffolds (those incorporating microspheric BSA and heparin but not bFGF). At day 10 posttransplantation, capillary density in the composite scaffolds was 45 +/- 3/mm(2) and it increased to 70 +/- 7/mm(2) by day 21. The released bFGF induced the formation of large and matured blood vessels, as judged by the massive layer of mural cells surrounding the endothelial cells. The control over bFGF delivery and localizing its effects to areas of need, may aid in the wider application of bFGF in therapeutic angiogenesis as well as in tissue engineering.

Alginates↗

PubMed2003

Controling the rate of protein release from polyelectrolyte complexes.

Extended protein release from readily prepared, water-insoluble complexes with oppositely charged polyions is explored. Using hen egg-white lysozyme as a model, its sustained release from such complexes with a number of polyanions under physiological conditions has been demonstrated and rationalized. The rate of release varies orders of magnitude and is controlled by the nature of the polyanion (decreasing upon increase in its linear charge density, length, and hydrophobicity) and the complex particle size (the larger the particles, the slower the release).

Alginates↗

PubMed2003

A novel cytomedical vehicle capable of protecting cells against complement.

We have developed "Cytomedicine," which consists of functional cells entrapped in semipermeable polymer, and previously reported that APA microcapsules could protect the entrapped cells from injury by cellular immune system. However, microencapsulated cells were not protected from humoral immune system. Here, we developed a novel APA microcapsule, in which APA microbeads (APA(Ba) microbeads) were modified to contain a barium alginate hydrogel within their centers in an attempt to make it more difficult for antibody and complement to permeate the microcapsules. The permeability of APA(Ba) microbeads was clearly less than that of APA microcapsules, presumably due to the presence of barium alginate hydrogel. Cells encapsulated within APA(Ba) microbeads were protected against treatment with xenogeneic anti-serum. Furthermore, murine pancreatic beta-cells encapsulated in APA(Ba) microbeads remained viable and continued to secrete insulin in response to glucose. Therefore, APA(Ba) microbeads may be a useful carrier for developing anti-complement device for cytomedical therapy.

Alginates↗