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Biomedical subjects

S G Lewis

Publications and source records attributed to S G Lewis.

5 recordsLinked to original sources
PubMed1992

The UCLA abutment: a four-year review.

The UCLA abutment has been used over the past 4 years in the restoration of osseointegrated implants. The design of the abutment allows fabrication of the restoration directly to the implant fixture, bypassing the transmucosal abutment cylinder. This technique is valuable in overcoming problems of limited interocclusal distance, interproximal distance, implant angulation, and soft tissue response. Another major advantage with the UCLA abutment is that of improved esthetics. After treatment of 46 patients with 118 UCLA abutments, the 4-year success rates are 95.8%.

Dental Abutments↗
PubMed1992

Framework design for bone-anchored fixed prostheses.

Fixed implant-supported restorations for edentulous patients provide excellent function, but can often be difficult to maintain. Design considerations are important to enable the patient to maintain optimal oral hygiene while complementing and enhancing the structural integrity of the prosthesis.

Acrylic Resins↗
PubMed1989

Heterogeneity of fast-oxidative muscle fibers of chicken demonstrated by anti-myosin monoclonal antibodies.

The fiber type composition of two fast muscles of the chicken, namely, adductor superficialis (AS) and pectoralis major (PM) was examined by the histochemical myosin ATPase staining and immunochemical techniques using monoclonal antibodies (McAbs). Two new McAbs produced against the myosin of the anterior latissimus dorsi (ALD) muscle of the chicken and named ALD-122 and ALD-83 were characterized to be specific for myosin heavy chain (MHC) and for myosin light chain-1 respectively. They were used in conjunction with previously reported McAbs specific for slow MHC (ALD-47), fast MHC (MF-14) and fast light chain-2 (MF-5). By the histochemical ATPase test most muscle fibers of AS and PM muscles reacted as IIA and IIB respectively. By immunofluorescent staining with the anti-MHC McAbs, ALD-122 and MF-14, the fibers of AS muscle showed remarkable heterogeneity whereas PM muscle fibers reacted uniformly. Differences in the myosin light chain composition of AS and PM muscles were also found by SDS-gel electrophoresis and immunoblot analysis with the anti-light chain McAb, ALD-83. The study clearly indicated that the histochemically homogenous (type IIA) AS muscle is composed of several subpopulations of fibers which differ in their myosin composition and that this heterogeneity of the muscle is not simply due to presence of variable amounts of slow myosin in its fibers.

Animals↗
PubMed1986

The morphology of Golgi-stained neurons in lamina II of the rat spinal cord.

Golgi-stained neurons in Lamina II of the rat spinal cord were examined by light microscopy. Stalked and islet cells similar to those seen in other species were found. Stalked cells were present in large numbers in the dorsal part of the lamina where they made up nearly half the population of stained cells. Islet cells were found throughout the lamina and constituted about one third of the total population. In the ventral part of the lamina half of the stained cells did not fall into either category, but could be divided into groups on the basis of dendritic spread. The axons of many of these cells either remained in Lamina II or passed ventrally into Lamina III. Some of these cells may correspond to the stellate or the II-III border cells which have been seen in human spinal cord and cat medulla respectively.

Animals↗