UNLABELLED BACKROUND/AIM: Retraction agents for temporary vertical and lateral suppression of gingival tissue as well as bleeding control and fluid flow in the gingival sulcus are expected to have maximal efficiency without irreversible damage of local tissue and adverse systemic effects. The research started from the assumption that tetrahydrozoline is a biologically more acceptable means of g...

The purpose of this study was to compare maxillary canine retraction with sliding mechanics and a Ricketts canine retraction spring, using a midpalatal orthodontic implant as a measuring reference. Eight patients (three males and five females) were examined. Because maximum posterior anchorage was required in all subjects, osseointegrated midpalatal implants were used. To examine tooth movement...

PARADOXICAL lid retraction of the ptotic lid on occlusion of the sound eye and several other synkinetic oculopalpebral phenomena are described in the literature in relation to ophthalmoplegia, congenital as well as acquired (Lewallen, 1958; Walsh, 1957). Fuchs's phenomenon of lid retraction on lateral movement, the pseudo-Graefe phenomenon with depression and lid retraction on elevation, are al...

Though the necessity to place the finish line into the gingival sulcus obviously has a negative effect on the quality of the impression,4,8-10 aspects of gingival retraction have only been sparsely investigated.3-5 The aim of gingival retraction is to allow access for the impression material beyond the abutment margins and to create space for the impression material to be sufficiently thick. Te...

BACKGROUND The intravenous anaesthetic propofol retracts neurites and reverses the transport of vesicles in rat cortical neurons. Orexin A (OA) is an endogenous neuropeptide regulating wakefulness and may counterbalance anaesthesia. We aim to investigate if OA interacts with anaesthetics by inhibition of the propofol-induced neurite retraction. METHODS In primary cortical cell cultures from n...

Distortion between the operating field and preoperative images increases as image-guided surgery progresses. Retraction is a typical early-stage event that causes significant tissue deformation, which can be modeled as an intraoperative compensation strategy. This study compares the predictive power of incremental versus single-step retraction models in the porcine brain. In vivo porcine experi...

Targeting of the NG2 proteoglycan to cellular retraction fibers was studied by expressing mutant NG2 molecules lacking specific structural elements of the proteoglycan. Both the cytoplasmic domain and the chondroitin sulfate chain of NG2 appear to have roles in sorting NG2 to subcellular microdomains destined to become retraction fibers. Neither of these structural features alone is sufficient ...

Does scientific misconduct severe enough to result in retraction disclose itself with warning signs? We test a hypothesis that variables in the results section of randomized clinical trials (RCTs) are associated with retraction, even without access to raw data. We evaluated all English-language RCTs retracted from the PubMed database prior to 2011. Two controls were selected for each case, matc...

Hepatic capsular retraction refers to the loss of the normal convex hepatic contour, with the formation of an area of flattening or concavity. This can result from myriad causes, including intrinsic hepatic conditions such as cirrhosis, biliary obstruction, benign tumours, malignancy and infections, as well as extrahepatic causes such as trauma. This article aims to provide familiarity with thi...