[Hospital Discharge Arrangements for Very Elderly Patients with Chronic Subdural Hematoma].

Introduction: Chronic subdural hematoma(CSDH)is a common condition encountered by neurosurgeons. Owing to increasing life expectancy and rapid population aging, the age at disease onset is delayed, which negatively affects hospital discharge arrangements. This retrospective study investigated patients aged ≥90 years who underwent surgery for CSDH.

The use of a fiber sleeve to improve fracture strength of pulpless teeth with flared root canals.

Objectives: This study aimed to investigate how use of a fiber sleeve may reduce interfacial debonding and improve fracture strength of pulpless teeth with flared root canals.

Methods: Pulpless premolars with flared root canals were restored either with a fiber-reinforced post (FRP) alone or with an FRP wrapped in a hollow tubular fiber sleeve. A normal root restored with an FRP alone served as a control.

Fracture strength and stress distributions of pulpless premolars restored with fiber posts.

This study examined the effect of glass fiber posts on increasing the fracture resistance of endodontically treated teeth. Extracted upper premolars with two canals in a root were divided into three groups according to the number of posts they were restored with: none, one, or two. All teeth were endodontically treated, crown-sectioned, and restored with a composite core and a metallic crown.

[A case of solitary bone cyst in the skull increasing in size after trivial head injury].

A 12-year-old boy had been known to have a small swelling in the left high vertex for several years. After a trivial head hit to the site of the swelling, the swelling enlarged gradually. A bone window CT scan showed a lesion having bubble-like lytic change in the left parietal bone.

Effects of heating on the mechanical and chemical properties of human dentin.

Objectives: We had previously discovered that the flexural and tensile strengths of human dentin were 2-2.4 times greater after being heated to 140°C, and deduced that the generation of higher-density structures and therefore dehydration probably promoted the increased strength. Our test hypotheses were that intertubular dentin, which constitutes a major part of organic components, was selectively affected by heating, and such changes could happen without critical damages to the basic structure of dentin type I collagen.

Intracranial foreign body granuloma caused by dural tenting suture.

Our patient presented with a mass lesion mimicking a meningioma. The mass was resected, but pathological examination confirmed a foreign body granuloma, which was caused by silk fibres used as tenting sutures 8 years previously. Herein, we describe the case and review the neurosurgical literature on intracranial foreign body granulomas.

[A complicated case of Nocardia brain abscess for differential diagnosis].

Background: Nocardia brain abscess is rare and has uncertain clinical features. Radiological differential diagnosis based on the metabolic feature of Nocardia is discussed.

Case Description: A 73-year-old man presented with a history of otitis media and was treated with antibiotics for 2 weeks.

Radiation-induced temporary hair loss as a radiation damage only occurring in patients who had the combination of MDCT and DSA.

As imaging technologies become increasingly advanced, it is possible to obtain detailed morphological information as well as functional imaging data. In some imaging technologies, the radiation dose increases with the ability to obtain better images or more detailed information. We encountered three cases of temporary bandage-shaped hair loss, which was caused by perfusion studies of the head by multi-detector row computed tomography (MDCT) for evaluation of cerebral blood flow in patients with vascular disorders.

The persistence of an open anterior fontanel in a 4-year-old girl.

Case Report: A 3-year-old girl was transferred to our hospital with a history of persistent open anterior fontanel. The patient was conscious and had no neurological deficits. Upon arrival, the patient appeared normal for her age and had no defects or anomalies other than the aforementioned lesion.

Comparison of cerebral blood flow in computed tomographic hypodense areas of the brain in head-injured patients.

Objective: Hypodense lesions identified on computed tomographic (CT) scans are often assumed to indicate ischemia. The purpose of this study was to investigate regional cerebral blood flow (rCBF) in hypodense areas of the brain after severe traumatic brain injury.

Methods: CBF was measured by stable xenon-enhanced CT scans.

Dynamic autoregulatory response after severe head injury.

Object: The purpose of this study was to evaluate the extent and timing of impairment of cerebral pressure autoregulation after severe head injury.

Methods: In a prospective study of 122 patients with severe head trauma (median Glasgow Coma Scale Score 6), dynamic tests of pressure autoregulation were performed every 12 hours during the first 5 days postinjury and daily during the next 5 days. The autoregulatory index ([ARI] normal value 5 +/- 1.