Morris P. Ruben

Effect of experimentally altered occlusal vertical dimension on temporomandibular articulation.

Abstract The occlusal relations of the teeth of monkeys were experimentally altered to increase the vertical dimension of occlusion for a period of 90 days. This procedure resulted in pathologic changes in the temporomandibular articulation which included extensive resorption of bone in the subchondral regions as well as of the bone along the anterior and posterior borders of the neck of the condyle and along the floor of the glenoid fossa. The articular cartilage of the condyle became thickened, and the condyle appeared to have been flattened.

Improved healing of experimental defects in the canine mandible by grafts of decalcified allogenic bone.

Abstract Standardized surgical defects were made on the buccal surface of canine mandibles. Autologous and decalcified allogenic grafts of canine bone were placed in these defects and allowed to heal for a period of from 2 to 8 weeks. Histologic study revealed that the decalcified allogenic bone grafts underwent complete resorption which was accompanied by new bone formation. The autologous grafts maintained their viability, were not resorbed, and were accepted by the host tissues. Bone regeneration appeared to be somewhat more rapid in decalcified allogenic grafts as compared to autologous grafts. These results suggest that decalcified allogenic bone grafts should be studied in more detail, for they could be of use in the treatment of bony defects in the facial bones.

Effects of soft dietary consistency and protein deprivation on the periodontium of the dog: A preliminary report

Abstract Manifestations of periodontal disease produced in dogs by a combined regimen of protein deprivation (with alternate repletion) and soft dietary consistency have been described. Clinical, roentgenographic, and histologic aspects of the observed lesions were presented. The noteworthy features of the oral tissue response were extensive calculus deposition, associated gingival inflammation and hyperplasia, periodontal pocket formation, and severe resorption of alveolar and supporting bone. The significance of the foregoing observations was discussed in relation to the ecology of human periodontal disease.

NOMA: ITS ASSOCIATION WITH NUTRITIONAL DEPRIVATION AND PHYSICAL DEBILITATION. REPORT OF A CASE.

Abstract The ecologic, clinical, microbiologic, histologic, and therapeutic aspects of noma (gangrenous stomatitis) have been reviewed. A case report has been presented, with a discussion of clinical, roentgenographic, microbiologic, and therapeutic aspects, which emphasizes the significant contributions of the pooled knowledge of a hospital team in bringing about the successful resolution of a case of noma superimposed upon existing physical debilitation and malnutrition.

Visualization of cellular dynamics associated with orthodontic tooth movement

ORTHODONTIC tooth movement appears to be dependent upon the presence Of osteoblasts and osteoclasts within the periodontal ligament and adjacent bone.l-’ A force applied to a tooth creates areas of pressure and tension. In areas of pressure, bone resorption, in association with the appearance of osteoclasts, is stimulated. In areas of tension, osteoblasts arise and form osteoid, which is subsequently calcified. The bone remodeling process allows the tooth to move and thus maintain the physiologic width of the periodontal ligament.lm7 It has been presumed that osteoblasts and osteoclasts a,re derived from the proliferation and differentiation of undifferentiated mesenchymal cells, since increased mitotic activity of mesenchymal cells is observed in the supporting tissues of a tooth subjected to an orthodontic force.*, 3l 7 In fact, however, the histogenesis of these cells is in doubt. On the other hand, cellular proliferation can be documented by the use of radioactive precursors of DNA, because DNA is duplicated during cell division. The appearance of radioactivity within cell nuclei indicates the presence of “new” DNA which had been synthesized in an early phase of the process of cell division.8 Therefore, using a DNA precursor, tritiated thymidine, we investigated the role of cellular proliferation during orthodontic tooth movement, with emphasis on the formation of osteoclasts and osteoblasts.

Desquamative gingivitis and its response to topical triamcinolone therapy.

Abstract A concept of desquamative gingivitis has been expressed. The condition probably is a reflection, clinically, of a variety of etiologic factors—both local and somatic in origin; in the majority of cases these influences cannot be elicited with clarity, and it is necessary to direct therapy to local alleviation of the gingival manifestations. The topical administration of triamcinolone acetate in Orabase constituted an effective form of therapy. The histopathologic characteristics of desquamative gingivitis include the detachment of epithelium, either intra- or subepithelially, with a variably severe connective tissue inflammatory reaction; it is difficult to collate this response to a specific etiologic agent.

Renal-cell carcinoma metastatic to the mandible and gingiva

A number of malignant tumors are capable of metastasizing to the oral tissues. These include adenocarcinomas derived from such areas as the lung,l* 2 thyroid,3 breast,4 rectum,5 uteruqG prostate,i and kidney.8-‘0 Robbins and Stockdale’l describe the probable pathways for metastasis of these lesions to the structures of the head, with a marked propensity for secondary localization in the mandible. Tumor emboli apparently enter the prevertebral plexus of veins (Batson) to reach the spinal column and skull. Invasion of the renal vein and the lymphatic system may also occur. Two qualities of the cancer cell tend to enhance the frequency of metastasis by embolization. These are (1) lack of cohesiveness of cancer cells to each otherI and (2) stickiness-the tendency of cancer cells to cling to a new surfa.ce.f” Normal cells, particularly epithelial, are noted for their resista.ncc to mechanical separation and their desire to seek contact.14 The intravasation of t)umor cells is possibly a function of (1) a structural opening in the vessel wall, whether it be a true defect or the normally weak approximation of lymphatic endothelium, (2 j a break in the vessel’s surrounding connective tissue. and/or (3 1 a prolonged or transient rise in extra.vasc,ular pressure.15 Tnt,ra.vasation may be further facilitat,ed by repeated trauma to the primary lesion; iatrogenic manipulation may also be responsible. The entrance of tumor cells into the circulation does not guarantee that implantation will occur at a distant site. The greater the number of tumor

Neurophysiology: A primer

Similar ebooks with Neurophysiology A Primer : the clinical neurophysiology primer 1st edition vcnlw neurophysiology a primer gbnti the clinical neurophysiology primer 1st edition esgla the clinical neurophysiology rimer lsmu talpykla clinical neurophysiology of motor neuron diseases handbook basic neurophysiology and the cortical basis of eeg american academy of neurology clinical neurophysiology clinical neurophysiology of epilepsy hc 1990 hxbmm sciences department of brain and cognitive neurophysiology research adinstruments prosperity and violence political economy of development sketches of japanese manners customs nasa historical data book volume 4 1969 1978 towards a theory and practice of teacher cultural politics sawdust and incense worlds that shape a priest things to know about going to the dentist tainted sand the lord is my shepherd expositions of selected psalms psychosexual medicine a study of underlying themes psychosexual medicine series physical science chemistry study matter 92 reluctant gravities palace of enchantments marine engine repair school stone cloak mops und moritz mopsiaden oder eine dicke freundschaft the great chefs of puerto rico sisters in solitude two traditions of buddhist monastic ethics for women a comparative analysis of uncovering spiritual narratives using story in pastoral care and ministry reshaping the future education and post conflict reconstruction the homosexual question an attempt to understand an issue of increasing urgency within a christian perspective the twelve dogs of christmas the higher learning the universities and the public peter on the shore vocation in scripture and in real life truth and singularity taking foucault into phenomenology 1st edition right hand of amon optimal control of nonsmooth distributed parameter systems lecture notes in mathematics volume 1459 rethinking the gospel sources from proto mark to mark revue de lorient et de lalg rie et de colonies bulletin et actes de la soci t orientale the ultimate os 2 file management toolkit the human eye worksheet answers we keep a light oasis standing on the shoulders of giants robert johnson complete memorias de jesus de nazaret felix varel official patients sourcebook on myopia whos who in the south and southwest 18th 1982 1983 trade and labour standards a review of the issues samuel johnson is indignant stories winning at office pol menopausal woman on the run a wicked womans guide to growing old international business czinkota 8th edition t s eliot reads wasteland four quartets moral philosophy theories and issues nagarjuniana studies in the writings and philosophy of nagarjuna 1st indian edition 3rd reprint zagovor antikhrista kniga 2 u poroga geenny ognennoi portugal the impossible revolution practice questions answers for nclex rn pencils to pixels ibps po question paper sukie iron on craft pad the washington star garden book the encyclopedia of gardening for the washington norfolk baltimore and the chesapeake area sharp el 1801piii instruction manual senior personnel administrator career examination series c 2410 self in relationships perspectives on family therapy thinking from a to z nonverbal abilities tests spec set to minutters stilhed garmin edge 200 user guide part of our time some ruins and monuments of the thirties telephone service manual the indian army and the making of punjab ap calculus third edition unlikely santa oddly normal the wyrm king beyond spiderwick chronicles 3 holly black primer to mechanism in organic chemistry paso a paso 3 teachers edition wwjd think about it sex and race sand and sandstone with 258 figures teddy bears scrapbook chapter 26 cabacitance solutions of selected problems pediatric burns therapeutic journal writing a tool for personal development and professional practice writing for stanleys africa murder at black dragon river monkey and robot in the garden 1st edition with heart and soul recipes created by and designed to be shared among friends welsh phonology selected readings the gray cloth paul scheerbarts novel on glass architecture wolfnight atlantic large print missouri facts and symbols the states and their symbols slades wells fargo colt toyota corolla user manual reporting on pro forma financial information statement on standards for attestation engagements issued by the auditing standards board toshiba satellite a105 manual nonviral vectors for gene therapy methods and protocols montanas flathead the last word tombstone wit and wisdom more collected verse motorola ihf1000 instruction manual toyota corolla 1994 manual vagrant king no man is an island thomas merton the lady and the champ unexpected