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  • 1
    Electronic Resource
    Electronic Resource
    The premaxilla: Embryological evidence that it does not exist in manFrom a thesis submitted as part of the requirements for the M.S. degree at Northwestern University Dental School.Partial support for this study was provided by USPHS grant DE 2014. (1967)
    New York, NY [u.a.] : Wiley-Blackwell
    The @Anatomical Record 158 (1967), S. 485-489 
    Details
    ISSN: 0003-276X
    Keywords: Life and Medical Sciences ; Cell & Developmental Biology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Medicine
    Notes: Many accounts of the human premaxilla describe its ossification centers and time of fusion with the maxilla, but that such a bone even exists in the human has long been questioned. Very few specimens undergoing initial phases of ossification have been reported and no convincing photographs of separate centers have been published.This report is based on 90 serially sectioned human embryos whose ages (Streeter's Horizons XVIII to XXIII) were closely grouped around the age when ossification of the upper jaw begins. There is but one ossification center bilaterally which, although it appears first in the cuspid region, rapidly involves an area extending from the molar to the central incisor region.Not one of the specimens showed an independent center for the “premaxilla” nor an “incisive suture” in the area of ossification. The premaxilla does not exist as an independent bone in man.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/ar.1091580411
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  • 2
    Electronic Resource
    Electronic Resource
    The behavior of biological materials at different sites of implantation (1968)
    Hoboken, NJ : Wiley-Blackwell
    Journal of Biomedical Materials Research 2 (1968), S. 81-88 
    Details
    ISSN: 0021-9304
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Medicine , Technology
    Notes: Adult albino rabbits were implanted with disks of 316 and 304 stainless steel in the subperiosteum of the anterior calvarium and the left mandible and in the left paravertebral and thigh muscles. The corresponding opposite sites were sham operated. The histopathological slides revealed that there was variation in thickness of the membrane in sections of both the paravertebral and thigh muscles; one side showing greater reaction than the other, which corresponded with the appearance of the implants. Sections of the calvarium revealed minimal bone and soft tissue reaction, although the implants showed corrosion compatible with soft tissue sites. The mandibular sections revealed extensive bone tissue reactions with minimum masseter muscle reactions, but the appearance of the implants due to corrosion was different than those of all other sites. Moderate eosinophilic infiltration was observed in sections containing deposits of corrosion products.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jbm.820020106
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  • 3
    Electronic Resource
    Electronic Resource
    The significance of implant shape in experimental testing of biological materials: Disc vs. RodSupported in part by National Institute of Health U.S.P.H.S. Grants DE-0125, GM-14099 and DE-00642. (1970)
    Hoboken, NJ : Wiley-Blackwell
    Journal of Biomedical Materials Research 4 (1970), S. 1-12 
    Details
    ISSN: 0021-9304
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Medicine , Technology
    Notes: Adult albino rabbits were implanted with 304 stainless steel discs and cylinders (rods) in the following sites: beneath periosteum of the anterior calvarium, under the masseter muscle of the left mandibular ramus and in the body of the sacrospinalis muscle. (1) The tissue reaction around the disc implants was compared with that observed around the cylinder implants through the study of histological sections. (2) The degree of reactions observed at the various sites was contrasted with that seen at the other sites. In all cases the muscle implants showed the greatest reaction. Discs showed many micro areas of tissue reaction randomly around their periphery. In contrast all the rod shaped implants in muscle showed a greater reaction towards the ends than in the mid portion of the shaft (clubbing) but rods implanted at other sites did not show this phenomenon. The results show that much of the histological tissue reaction seen around muscle implants is really caused by mechanical trauma which must be differentiated from a non-compatibility reaction. It is important to choose a test site where mechanical trauma will be minimal (submasseteric site) and use an implant shape (discs) which will not produce clubbing.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jbm.820040102
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    Paper (German National Licenses)
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