Alveolar Bone Microstructure Surrounding Orthodontic Anchor Screws with Plasma Surface Treatment in Rats

A lateral load was applied to anchor screws that had undergone surface treatment, and the structure, cellular dynamics, and quality of the bone surrounding anchor screws were analyzed to investigate the effect of this surface treatment on the peri-implant jawbone. In addition, bone microstructural characteristics were quantitatively evaluated for each site of loading on the bone around the anchor screw. Rats were euthanized after observation on days 3, 5, or 7, and bone quality analyses were performed. Bone–implant contact rate increased more rapidly at an early stage in the treated surface group than in the untreated surface group. Bone lacuna morphometry showed that the measured values adjacent to the screw at the screw neck on the compressed side (A) and at the screw tip on the uncompressed side (D) were significantly lower than those at the screw tip on the compressed side (B) and at the screw neck on the uncompressed side (C). Collagen fiber bundle diameter showed that the measured values adjacent to regions A and D were significantly higher than those at regions B and C. Anchor screw surface activation facilitates initial bone contact of the screw, suggesting that early loading may be possible in clinical practice.Okawa K., Matsunaga S., Kasahara N., et al. Alveolar Bone Microstructure Surrounding Orthodontic Anchor Screws with Plasma Surface Treatment in Rats. Journal of Functional Biomaterials 14, 356 (2023); https://doi.org/10.3390/jfb14070356

下顎犬歯236歯の根管形態についての検討

To achieve the effect of mechanical preparation of root canals, transparent specimens of extracted 236 mandibular canines were investigated for canal configuration, thickness and curvature of the root canal, condition of any accessory canals, and location of the apical foramen. Fewer than 25% of the specimens showed accessory canals that were impossible to clean mechanically. The majority of the lateral branches were 0.15mm<and≦0.20mm. Although apical foramina located away from the apex were observed in 18% of the mandibular canines. All apical foramina were located within 0.5mm of the apex. Data on the thickness of the root and main canal in the apical portion and curvature of the root canal suggest that for adequate apical preparation, a #60 file must be able to reach the apical constriction

A Clinical Evaluation of a Plastic Temporary Filling Material (Dura Seal®)

Recently Dura Seal, a kind of plastic, has been marketed as a temporary filling material. This clinical study was done to determine whether or not Dura Seal has the properties advertised by the manufacturer. A total of 135 teeth, including 110 vital teeth and 25 pulpless teeth, were prepared for metal inlay cavities. The prepared cavities were sealed with Dura Seal for an average of 12.0 days. Dura Seal was found to be easily removable, to show no pulp damage, and to have considerable mechanical strength

トウニョウビョウ ケア ノ リスク マネージメント

The number of diabetics has been increasing in recent years. The diabetics are under varioustreatments, including the improvement of life habit and the medication for diabetes with insulin.Our hospital set a team of diabetic care, which is composed of a diabetic specialist, certified diabeteseducators（CDEs）, nurses, dietricians and pharmacists. This team takes great care of the diabetics.For medical safety measures, the department of risk management was organized in our hospital.The department investigated the cases of Hiyari-Hatto within 1 year and 3 months, from 2005to 2006, and found that 3% of them was the diabetic case, which was caused by the nurses exceptCDEs. Therefore the department made the manual of diabetic therapy in cooperation with theCDEs. All the staffs in our hospital were educated by the seminars according to the manual. Theknowledge about the diabetic therapy proved to be mostly accurate one year after the last seminar.For the improvement of medical safety, the department of risk management helps the CDEswith holding the educational seminars by giving the informations after analyzing the cases of Hiyari-Hatto and the questionnaires following the seminars

光重合型プラスチック暫間充填材の臨床的評価

Fermit, a kind of a visible-light-cured resin, has recently been used as a temporary filling material. This clinical study was done to determine whether or not Fermit was superior to Dura Seal which was previously reported by us in this journal. The prepared cavities were sealed with Fermit for an average of 11.0 days. Fermit was found to have the same properties as Dura Seal, except for many losses of the seal (17.6% of the total) and difficulty in filling

Evolution of living donor liver transplantation over 10 years: experience of a single center.

PURPOSE: To evaluate the changes in living donor liver transplantations (LDLTs) over the last 10 years, we analyzed our experience of performing LDLT in a single center. METHODS: We performed 73 LDLTs over the 10 years between 1997 and 2007 in Nagasaki University Hospital, Japan. RESULTS: Initially, from 1997 to 2003, LDLT was performed for pediatric patients; then, between 2004 and 2007, adult-to-adult LDLT was introduced, primarily for hepatocellular carcinoma (HCC) in liver cirrhosis. We also began performing LDLTs for adults with ABO-incompatible blood type combination in the latter period. As the number of adult-to-adult LDLTs increased, left-sided grafts became fi rst choice for these patients. Survival rates were 88.3%, 77.2%, 70.2% at 1, 3, and 5 years, respectively. There was a relatively low incidence of arterial complications, and although the incidence of biliary complications was high initially, it decreased with experience. Likewise, the operative time, blood loss, and hospital stay after LDLT also improved remarkably. CONCLUSION: Over the last 10 years the indications for, and operative techniques used in LDLT have changed dramatically, even in a single center in Japan