Gap measurement and bond strength of five selected adhesive systems bonded to tooth structure.

The ability of a restorative material to bond and seal the interface with tooth structure is perhaps the most significant factor in determining resistance to marginal caries. Thus, the quality and durability of marginal seal and bond strength are major considerations in the selection of restorative materials. The purpose of this study was to compare the bond strength and marginal discrepancies of five adhesive systems: All-Bond 2, Clearfil Liner Bond, KB 200, ProBond and AELITE Bond.

Bacterial eradication by clinafloxacin, CI-990, and ciprofloxacin employing MBC test, in-vitro time-kill and in-vivo time-kill studies.

Bactericidal activities of clinafloxacin, CI-990 and ciprofloxacin were examined and compared for a small collection of gram-positive and gram-negative pathogens. In-vitro antimicrobial activities were measured by MIC, MBC and time-kill studies; in-vivo efficacy of each drug was assessed in an acute lethal mouse infection model that monitored median protective dose, eradicative dose and time-kill in blood. In general, for all test methods, activity of clinafloxacin exceeded that of CI-990, which in turn exceeded that of ciprofloxacin.

Does dextrose affect analgesia or the side effects of intrathecal sufentanil?

Unlabelled: Intrathecal (i.t.) sufentanil provides rapid effective pain relief for early labor, but it also produces undesirable side effects, which may be primarily related to cephalad spread.

In-vitro activity of clinafloxacin, trovafloxacin, and ciprofloxacin.

Clinafloxacin and trovafloxacin are two new fluoroquinolones for which few comparative data are available. When MICs of ciprofloxacin against Gram-positive and Gram-negative nosocomial species were compared, clinafloxacin was the most potent although trovafloxacin was also more active than ciprofloxacin against Staphylococcus aureus and enterococci. All three drugs were bactericidal.

Lengths of hamstrings and psoas muscles during crouch gait: effects of femoral anteversion.

Recent studies of muscle lengths measured by means of gait analysis data and musculoskeletal models have suggested that in many cases of crouch gait in patients with cerebral palsy, the hamstrings are of normal length and the psoas muscles are short. In these studies, however muscle lengths were calculated by applying kinematic data from a child's joint to a normal adult model. Children with cerebral palsy and other disorders generally do not have normal bone architecture but instead have muscle attachment points and muscle paths altered by osseous deformities.

A laboratory study of dimensional changes for three elastomeric impression materials using custom and stock trays.

Clinical success of fixed prosthodontic procedures is dependent in part upon the dimensional accuracy of elastomeric impression materials and impression procedures. Three elastomeric impression materials were used in custom and stock trays to determine the accuracy of impressions taken from an experimental stainless steel model representing premolar and molar bridge abutment preparations. Horizontal and vertical individual abutment and interabutment dimensions were measured on die stone replicas, and the measurements compared with those obtained from stainless steel master models.

In their own words. Surgeon representatives discuss legislative and regulatory issues. Part II.

This is the second of a two-part series featuring surgeons who serve on panels, committees, and other groups that offer advice or comments on health policy issues to the federal government; Part I appeared in the September 1996 Bulletin. In their own words, these surgeons describe the issue areas they are addressing and their significance to the profession.

Structure-activity relationships of quinolone agents against mycobacteria: effect of structural modifications at the 8 position.

A series of quinolones with substitutions at the 8 position has been prepared as part of a study to examine the relationship between structural modifications at this position and activity against mycobacteria. The compounds were prepared by procedures described in the literature and were evaluated for their activities against Mycobacterium fortuitum and Mycobacterium smegmatis. The activities of the compounds against these two organisms were used as a measure of Mycobacterium tuberculosis activity.

Postoperative radiotherapy for locally advanced colon cancer.

Background: The role of adjuvant postoperative radiotherapy for locally advanced colon cancer is not well documented.

Methods: Seventy-eight patients who underwent a complete resection of B2-C colon cancer received postoperative radiotherapy. Twenty-eight patients received < or = 45 Gy; 50 patients received 50-55 Gy.

A preliminary study of the effects of laser radiation on collagen metabolism in cell culture.

A low power Ga-As pulse laser was used to stimulate cultured human embryonic fibroblast cells. Energy fluencies varied from 0-1 J/cm2 over a period of 1-4 days. Fibroblast procollagen production was monitored by the synthesis of [3H] hydroxyproline, and DNA replication was assessed by [3H] thymidine incorporation.