The Influence of Tactile Perception on Classification of Bone Tissue at Dental Implant Insertion.

Background: Various ways of using the Lekholm and Zarb (L&Z) classification have added to the lack of scientific evidence of the effectiveness of this clinical method in the evaluation of implant treatment.

Purpose: The study aims to assess subjective jawbone classifications in patients referred for implant treatment, using L&Z classification with and without surgeon's hand perception at implant insertion. The association between bone type classifications and quantitative parameters of primary implant stability was also assessed.

Cytotoxic aporphine alkaloids from Ocotea acutifolia.

Two new aporphinoid alkaloids, (+)-6 S-ocoteine N-oxide and (+)-norocoxylonine, were isolated from the leaves and trunk bark of OCOTEA ACUTIFOLIA (Lauraceae) along with thirteen aporphine analogues, one morphinan alkaloid, and one flavonoid. The aporphine alkaloids (+)-thalicsimidine and (+)-neolitsine are reported for the first time for the genus OCOTEA. The structures of all compounds were established on the basis of 1D- and 2D-NMR spectroscopic techniques, optical rotation and/or mass spectrometry data.

Effect of somatostatin analogue octreotide on pain relief after major abdominal surgery.

Background: Octreotide acetate is an 8-amino-acids synthetic octapeptide analogue of somatostatin with much-enhanced duration of action and lower incidence of side effects. We assessed the utility of using intravenous octreotide as an adjuvant to opioid analgesia that might exert a post-operative opioid-sparing effect.

Methods: Forty-four patients were randomly allocated, to receive either a placebo or intraoperative octreotide 0.

[An interdisciplinary therapy concept in treatment of paragangliomas of the skull base--demonstrated with a case].

Surgical resection of paragangliomas in the cervical region is complicated due to the tumour vascularity and is associated with the risk of major intraoperative blood loss. Preoperative angiographic embolization of the tumour supplying arteries by intravascular injection of gelfoam and implantation of microcoils was performed to decrease tumour vascularity. We report the case of a 78 years old female patient suffering from a carotid body tumour.

Results of leptospirosis examinations of human sera from El Salvador.

The authors examined 984 human sera for leptospirosis with the serovars from 15 serogroups serologically in 15 localities of El Salvador. In 17.5% of the sera the following reactions were found with serovars of 13 serogroups: Australis 6.

Intestinal parasites in children with diarrhea in El Salvador.

In a study of parasitological prevalence in El Salvador, stool specimens of 210 children with diarrhea were examined for intestinal parasites. In 104 cases (49%), intestinal helminths and protozoa were found. 53.

Serological examination for HIV-I antibodies in Nicaragua, Columbia and El Salvador.

22 of 182 sera samples from Nicaragua, 6 of 111 samples from Columbia, and 25 of 388 samples from El Salvador were positive in the ELISA test. 37 of the 53 positive sera samples were positive again in a further ELISA test, and 1 of them was positive in the IFT and Western Blot test.

Distribution of immunoreactive fibronectin and collagen (type I, III, IV) in mouse joints. Fibronectin, an essential component of the synovial cavity border.

Hyaluronic acid traditionally has been held to play a major role in the control of transsynovial exchanges and in the biomechanical properties of synovial fluid and cartilage surfaces. As with previous ultrastructural observations, immunohistochemical data show that a more complex differentiation must be envisaged for interstitial tissues bordering the synovial cavity. In particular, the elective concentration of fibronectin in the lining layer of the synovial membrane and its presence as a fine layer at the articular cartilage surfaces indicate that this glycoprotein, along with hyaluronic acid, may play an important role in joint physiology.

Light and electron microscopic study of ear cartilage in a case of relapsing polychondritis evolving under corticoid treatment.

Light and electron microscope studies of the ear cartilage in a patient with relapsing polychondritis (RP) under corticoid treatment are reported. Unilateral auricular deformation evolved without inflammatory epidoses and the lesions consisted mainly of marginal erosions filled with fine collagen fibrils and containing degenerating perichondrial cells in their basal parts. Degenerative cells were scattered throughout the perichondrium, but cartilage erosions only occurred when numerous cells were affected in a same area.

B-cells of the synovial membrane. III. Relationship with the specific collagenous structure of the intimal interstitium in the mouse.

An ultrastructural study of the synovial membrane in mice revealed that, in addition to specific polypeptide-producing secretory cells (B-cells), the intima is characterized by a specific differentiation of the interstitium adjacent to the synovial cavity. Scattered collagen fibrils are embedded in a fine fibrillar material, which often appears as cross-striated strands resembling long-spacing-collagen (periodicity from 90 to 120 nm). Similar material was found along the synovial cavity in the rat, guinea pig, rabbit and man.

Physiological study of amino acid uptake and receptor desensitization: the GABA system in dorsal root ganglia.

GABA applied under microscopic vision (x320) to neurones of isolated DRG, triggers a depolarizing outflow of Cl-, as seen in intracellular recordings of large somata with myelinated fibres. Group C neurones have now also been examined with respect to diversity of GABA receptors. Cells of small diametre (less than 30 micrometers) responding to stimulation of slow conducting, (less than 2.

B-cells of the synovial membrane. II. Differentiation during development of the synovial cavity in the mouse.

Study of pre- and postnatal development of the metatarsophalangeal joint of the mouse shows that the synovial cavity (SC) forms before any differentiation of the synovial mesenchyme. The primitive cleft results from degradation of a thin vascular mesenchymal layer in direct contact with the chondrogenic layers. Differentiation of the synovial membrane coincides with clarification of the SC (3rd to 6th day of postnatal life).

[Secretory aspects and differentiation of B cells of the synovial membrane in mice].

The intimal layer of the synovial membrane (SM) includes essentially 2 cell types: A-cells with macrophagic functions and B-cells generally assimilated to fibroblasts. A comparative study of the B-cells in some mammals revealed that these cells possess specific polypeptidergic secretory features which are particularly clear in the mouse. The B-cells, which are more numerous than A-cells and often entirely line the synovial cavity, probably play an essential role in the metabolism of the SM.

B-cells of the synovial membrane. I. A comparative ultrastructural study in some mammals.

Comparative ultrastructural study of the B-cells in the intimal layer of the synovial membrane in mouse, rat, rabbit, guinea-pig and man clearly distinguishes these cells from both the histiocytic A-cells (macrophage-like cells) and the fibroblasts. In addition to the marked development of the rough endoplasmic reticulum and Golgi apparatus, typical dense secretory vesicles apparently of Golgi origin are always found in mouse B-cells and frequently in those of the rat. These secretory characteristics clearly relate these cells to glandular cells engaged in polypeptidic secretion.

Morphological evidence of a polypeptide-like secretory function of the B cells in the mouse synovial membrane.

In the synovial membrane of the mouse, morphological features associated with active secretion are unusually well developed in cells immediately subjacent to the lining layer (in the position of B cells), comparable to those of cells known to elaborate polypeptides.

[Fine structure of the public symphysis in the mouse].

Classical histological descriptions of the modifications of the mouse pubic symphysis (PS) during pregnancy did not take sufficient account of its structural heterogeneity. Precise morphological study of the PS, in adult male and virgin female mice, was carried out under light and electronic microscopy. Our observations on pregnant females are still imcomplete.

Identification by gas chromatography and mass spectrometry of 1-monoglycerides in European hamster brown adipose tissue and plasma.

1. In organ culture, brown adipose tissue of the hibernator, the European hamster, synthezises from [14C]acetate a compound which is secreted into the culture medium. 2.

[Multiplication of the different varieties of cells of the mouse pubic symphysis during growth and early gestation: radioautographic study with the use of tritiated thymidine].

1) A radioautographic study was undertaken after injection of tritiated thymidine during post-natal growth. The mitotic activity was localized in the three constituents of the mouse pubic symphysis: - in the osteogenic cartilage, labelled nuclei are numerous throughout animal growth; - in the articular cartilage, labelled nuclei are seldom encountered; - in the medial region, the chondroblasts, elongated dorso-ventrally, and the fibroblasts of the dorsal ligament show numerous labelled nuclei. 2.