PURPOSE: . This study evaluated the fracture resistance of premolar screwretained implant-supported hybrid abutment crowns (HACs) fabricated from different monolithic restorative materials following artificial aging. MATERIALS AND METHODS: . Forty-four titanium implant analogs were restored with HACs fabricated from four materials: 5 mol% yttria-partially stabilized monolithic zirconia (ST), strength-gradient multilayered zirconia (YM), lithium disilicate ceramic (LD), and resin composite containing dispersed nanoparticles (CM) (n = 11 per group). All specimens were subjected to thermocycling (10,000 cycles) and mechanical loading (1.2 million cycles) to simulate 5 years of clinical service.Fracture resistance was evaluated under compressive loading, and failure modes were analyzed using optical microscopy and scanning electron microscopy.Statistical analysis was performed using the Kruskal-Wallis and Steel-Dwass tests (α = 0.05). RESULTS: . Significant differences were found among all groups (P = 0.00033-0.0022). The YM group exhibited the highest median fracture resistance (2.06 kN, IQR: 2.00 – 2.60 kN), followed by ST (1.74 kN, IQR: 1.69 – 1.80 kN), LD (1.29 kN, IQR: 1.14 – 1.41 kN), and CM (0.87 kN, IQR: 0.79 – 0.92 kN). All specimens survived the artificial aging protocols. Distinct fracture patterns were observed depending on the restorative material, with zirconia-based groups showing more favorable resistance than resin composite. CONCLUSION . All tested HACs exhibited fracture resistance values exceeding maximum bite forces, supporting their clinical applicability. Strength-gradient multilayered zirconia demonstrated superior reliability after simulated 5-year aging, emphasizing its structural advantage and broader safety margin compared with other restorative materials.

InLao PDR, the National Malaria Control Program (NMCP) evaluates bednet coverage,often at the village level, using a coverage target of one net per 2.5 (or fewer)persons in a given population. However, in villages that meet the target, notall households necessarily meet the target or utilize all available bednets. Thisstudy explored households that fell short of the target and household utilizationof bednets in villages that met the target of bednet coverage set by the NMCP. Thepersons per net ratio (PPNR), which is defined as the population divided by thenumber of available bednets in a household/village, was used to determine whethera household/village met the NMCP target. Using a household survey, we collectedand analyzed the data of 635 households in 17 villages in Xepon district in2012. Households that fell short of the target (households with a PPNR of >2.5 or no bednet) existed in every village. The proportion of these households differedgreatly among the villages, ranging from 3.4–50%, with some households fallingfar short. Of the 635 households, 275 (43.5%) had at least one bednet that wasnot being used on the night preceding the survey and 131 (20.6%) had at leasttwo. In conclusion, in villages that met the NMCP target, a considerable numberof households fell short of the target. Available bednets were not fullyutilized in many of the surveyed households.

In Lao PDR, the National Malaria Control Program (NMCP) evaluates bednet coverage, often at the village level, using a coverage target of one net per 2.5 (or fewer) persons in a given population. However, in villages that meet the target, not all households necessarily meet the target or utilize all available bednets. This study explored households that fell short of the target and household utilization of bednets in villages that met the target of bednet coverage set by the NMCP. The person per net ratio (PPNR), which is defined as the population divided by the number of available bednets in a household/village, was used to determine whether a household/village met the NMCP target. Using a household survey, we collected and analyzed the data of 635 households in 17 villages in Xepon district in 2012. Households that fell short of the target (households with a PPNR of > 2.5 or no bednet) existed in every village. The proportion of these households differed greatly among the villages, ranging from 3.4–50%, with some households falling far short. Of the 635 households, 275 (43.5%) had at least one bednet that was not being used on the night preceding the survey and 131 (20.6%) had at least two. In conclusion, in villages that met the NMCP target, a considerable number of households fell short of the target, and the available bednets were not fully utilized in many of the surveyed households.

Aplastic anemia is a syndrome characterized by pancytopenia, and performing an open heart operation for patients with this syndrome may be associated with an increased surgical risk for both bleeding and post-surgical infection. We report a case of mitral regurgitation complicated with aplastic anemia that underwent a mitral valve repair via a right lateral minithoracotomy. The patient was a 70-year-old woman who presented with shortness of breath on exertion. She was found to have aplastic anemia based on pancytopenia (WBC 2,150/µl, Hgb 8.8 g/dl, PLT 5.0×10⁴/µl) and the results of a bone marrow biopsy. Echocardiography showed severe mitral valve insufficiency at the same time, and the patient was referred for surgery. To deal with the decrease in white blood cells and platelets, prior to surgery, a granulocyte colony-stimulating factor was administered, 30 units of platelet concentrate were transfused during the operation, and mitral valve repair via a right lateral minithoracotomy was performed. After surgery, there were no complications due to infection or bleeding, and the subsequent course was favorable. Several studies have reported the advantages in right minithoracotomy of less intraoperative bleeding and a lower infection rate compared with full sternotomy. In cases of this kind, in which there is a tendency toward bleeding and ease of infection, we believe that right lateral minithoracotomy may be a useful option to consider.

Enterovesical fistula is a relatively uncommon complication of colorectal and pelvic malignancies, diverticulitis, inflammatory bowel disease, radiotherapy, and trauma in Asian countries. A case of vesico-ileosigmoidal fistula and a literature review of this disease in Japan are presented. A 70-yr-old male was referred with complaints of urinary pain and pneumaturia. On admission, urinary tract infection and pneumaturia were presented. A barium enema demonstrated multiple diverticulum in his sigmoid colon and the passage of contrast medium into the bladder and ileum. Under the diagnosis of vesico-ileosigmoidal fistula due to suspected diverticulitis of the sigmoid colon, sigmoidectomy and partial resection of the ileum with partial cystectomy were performed. The histopathology revealed diverticulosis of the sigmoid colon with diverticulitis and development of a vesico-ileosigmoidal fistula. No malignant findings were observed. Until the year 2000, a total of 173 cases of vesico-sigmoidal fistula caused by diverticulitis had been reported in Japan. Pneumaturia and fecaluria are the most common types, presenting symptoms in 63% of the cases. Computed tomography, with a sensitivity of 40% to 100%, is the most commonly used diagnostic study. For patients with vesico-sigmoidal fistula, resection of the diseased sigmoid colon and partial cystectomy with primary anastomosis are the safest and most acceptable procedures, leading to the best results.
Aged ; Anastomosis, Surgical ; Bladder Fistula/*etiology/*pathology/surgery ; Colon, Sigmoid/pathology ; Cystectomy ; Diverticulitis/*complications/*pathology/surgery ; Human ; Ileum/pathology ; Male