Although cementless revision arthroplasty of the hip has become the gold standard, revision arthroplasty of the distal femur is controversial. This study evaluated the anchoring principles of different femoral revision stem designs in extended bone defect situations, taking into account the anatomical conditions of the proximal and distal femur, and the resulting primary stability. Cementless p...

BACKGROUND This review aims to compare the effectiveness of en masse and two-step retraction methods during orthodontic space closure regarding anchorage preservation and anterior segment retraction and to assess their effect on the duration of treatment and root resorption. METHODS An electronic search for potentially eligible randomized controlled trials and prospective controlled trials wa...

Treatment of Class II malocclusions, without extractions, frequently requires distalization of maxillary molars into a Class I relationship by means of extra-oral or intraoral forces. Several methods and devices can be used to distalize maxillary molars and to correct Class II malocclusions. The most conventional method for distalizing the maxillary molars involves use of cervical headgear but ...

Epithelial cell lines derived from rat tracheal implants 2 and 9 months after a 4-week exposure to 200 micrograms dimethylbenz(a)anthracene-beeswax pellets, and previously assayed for growth in soft agarose and tumorigenicity, were tested at the same time of subculture for cytochalasin B-induced multinucleation to determine the relationships between anchorage-independent growth, uncontrolled nu...

Since the end of the 1970s, various appliances with intramaxillary anchorage for distalization of the upper molars have been described as an alternative to headgear. The major advantages of these innovative appliances are that they act permanently and are independent of patient compliance. The purpose of this study was to compare the efficiency, both quantitatively and qualitatively, of various...

The behaviour of squat shape partially grouted concrete masonry shear walls with fixed-end boundary conditions subjected to constant average axial stress and cyclic lateral loading was investigated. Two replicas were tested each combination horizontal reinforcement ratio (0.12%, 0.06%, 0.03%) four end anchorage (straight, 90°, 180°, studs). the compared in terms strength, ductility, stiffness, ...

INTRODUCTION The purpose of this study was to compare the clinical effectiveness of the midpalatal implant as a method of reinforcing anchorage during orthodontic treatment with that of conventional extraoral anchorage. This was a prospective, randomized, clinical trial at Chesterfield and North Derbyshire Royal Hospital NHS Trust and the Charles Clifford Dental Hospital, Sheffield, in the Unit...

The purpose of this study was to determine whether nickel-transformed Chinese hamster cells exhibit nonrandom chromosomal alterations involving heterochromatic regions, particularly the heterochromatic long arm (q) of the X-chromosome, since nickel was previously shown to induce acute chromosomal damage predominantly in heterochromatin. Early passage male or female Chinese hamster embryo cells ...

Transfection of activated promotion sensitivity genes(pro genes)con fers on insensitive (P) cells susceptibifity to induction of anchorage Independent growth by tamer-promoting phorbol esters. Promotion-sen sitive (P) JB6 cell variants, from which activated pm-i and pro-2 were cloned, res@ to 12.O-tetradecanoylpborbol-13-acetate (1PA)and var Ions noophorbol tumor promoters with anchorage-Indepe...

The aim of this study was to compare the effects of the Gjessing (PG) retraction spring used with and without the zygoma anchorage system (ZAS) on canine retraction. Thirty patients, with an Angle Class I or Class II malocclusion, whose upper first premolars were scheduled for extraction, were divided into two equal groups. Group 1 comprised maximum anchorage cases (nine females and six males w...