Effectiveness of 4 Pulpotomy Techniques—Randomized Controlled Trial

Pulpotomy is the accepted therapy for the management of cariously exposed pulps in symptom-free primary molars; however, evidence is lacking about the most appropriate technique. The aim of this study was to compare the relative effectiveness of the Er:YAG laser, calcium hydroxide, and ferric sulfate techniques with that of dilute formocresol in retaining such molars symptom-free. Two hundred primary molars in 107 healthy children were included and randomly allocated to one of the techniques. The treated teeth were blindly re-evaluated after 6, 12, 18, and 24 months. Descriptive data analysis and logistic regression analysis, accounting for each patient's effect by a generalized estimating equation (GEE), were used. After 24 months, the following total and clinical success rates were determined (%): formocresol 85 (96), laser 78 (93), calcium hydroxide 53 (87), and ferric sulfate 86 (100). Only calcium hydroxide performed significantly worse than formocresol (p = 0.001, odds ratio = 5.6, 95% confidence interval 2.0-15.5). In conclusion, calcium hydroxide is less appropriate for pulpotomies than is formocresol

Electrodeposited inorganic separators for alkaline batteries

Coating electrodes of silver-cadmium cells with thermostable electrodeposits of calcium hydroxide or magnesium hydroxide reduces silver migration and increases cell life. Absence of organic matter enables assembled cells to be sterilized without oxidation of the material of the separators

The Effect of Calcium Hydroxide on Fibroblast Cells Viability

Calcium hydroxide [Ca(OH)2] is widely used as medicament in dental pulp and root canal therapy. Previous studies demonstrate the ability of calcium hydroxide to induce necrosis in dental pulp tissue. However, the mechanism of tissue destruction remains unknown. The aim of this study was to investigate fibroblast cell viability in response to calcium hydroxide exposure. In this study, Vero fibroblast cell line was treated with various concentrations of calcium hydroxide for 24 hours. Cell viability was measured by using MTT assay. Our results showed significant decrease in cell viability after exposed with calcium hydroxide at concentration 62.5 and 125 µg/ml. The result indicated that calcium hydroxide induced cell death in Vero cell line in a dosedependent manner. This study suggests that fibroblast cell death may involved in the mechanism of pulp tissue necrosis caused by calcium hydroxid

Antimicrobial activity of calcium hydroxide and chlorhexidine on intratubular Candida albicans

This study investigated the efficacy of calcium hydroxide and chlorhexidine gel for the elimination of intratubular Candida albicans (C. albicans). Human single-rooted teeth contaminated with C. albicans were treated with calcium hydroxide, 2% chlorhexidine gel, calcium hydroxide plus 2% chlorhexidine gel, or saline (0.9% sodium chloride) as a positive control. The samples obtained at depths of 0–100 and 100–200 µm from the root canal system were analyzed for C. albicans load by counting the number of colony forming units and for the percentage of viable C. albicans using fluorescence microscopy. First, the antimicrobial activity of calcium hydroxide and the 2% chlorhexidine gel was evaluated by counting the number of colony forming units. After 14 days of intracanal medication, there was a significant decrease in the number of C. albicans colony forming units at a depth of 0–100 µm with chlorhexidine treatment either with or without calcium hydroxide compared with the calcium hydroxide only treatment. However, there were no differences in the number of colony forming units at the 100–200 µm depth for any of the medications investigated. C. albicans viability was also evaluated by vital staining techniques and fluorescence microscopy analysis. Antifungal activity against C. albicans significantly increased at both depths in the chlorhexidine groups with and without calcium hydroxide compared with the groups treated with calcium hydroxide only. Treatments with only chlorhexidine or chlorhexidine in combination with calcium hydroxide were effective for elimination of C. albicansFAPESP 2007/00306-1FAPESP 2007/003061CAPESCAPE

The Effectof CalciumHydroxideon FibroblastCellsViability

Calcium hydroxide [Ca(OH)2]is widely used as medicament in dental pulp and root canal therapy. Previous\u27 studies demonstrate the aoility of calcium hydroxide to induce necrosis in dental pulp tissue. However, the mechanism of tissue destruction remains unknown. The aim of this study was to investigate fibroblast cell viability in response to calcium hydroxide exposure. In this study, Vero fibroblast cell line was treated with various concentrations of calcium hydroxide for 24 hours. Cellviabilitywas measured by using MTTassay. Our results showed significantdecrease in cellviabilityafter exposed with calcium hydroxide at concentration 62.5 and 125 Jlg/ml. The result indicated that calcium hydroxideinduced cell death in Verocell line in a dosedependent manner. This study suggests that fibroblast cell death may involved in the mechanism of pulp tissue necrosis caused by calcium hydroxide

The Effect of Calcium Hydroxide on Fibroblast Cells Viability

Calcium hydroxide [Ca(OH)2] is widely used as medicament in dental pulp and root canal therapy. Previous studies demonstrate the ability of calcium hydroxide to induce necrosis in dental pulp tissue. However, the mechanism of tissue destruction remains unknown.  The aim of this study was to investigate fibroblast cell viability in response to calcium hydroxide exposure. In this study, Vero fibroblast cell line was treated with various concentrations of calcium hydroxide for 24 hours.  Cell viability was measured by using MTT assay. Our results showed significant decrease in cell viability after exposed with calcium hydroxide at concentration 62.5 and 125 µg/ml. The result indicated that calcium hydroxide induced cell death in Vero cell line in a dosedependent manner. This study suggests that fibroblast cell death may involved in the mechanism of pulp tissue necrosis caused by calcium hydroxid

Influence of Exposing Root Canal Dentin to Calcium Hydroxide on Its Flexural Strength

Calcium hydroxide has been used extensively in endodontic treatments, for instance as an intra-canal dressing; however, the exposure of root canal dentin to calcium hydroxide may affect its flexural strength and could have important clinical implications for endodontic treatment. The purpose of this in vitro study was to investigate the influence of calcium hydroxide on the flexural strength of root canal dentin.Seventy-two extracted single-rooted human mandibular premolars were used in this study. Each tooth was instrumented using crown-down technique and was irrigated using sterile saline. The teeth were assigned into three groups of 24 each. The prepared root canal system of each tooth was filled with calcium hydroxide mixed with sterile saline (group 1), a calcium hydroxide commercially available product (UltraCal®) (group 2) or saline solution (group 3, as control). The apices and access opening were sealed using composite resin, and the teeth were immersed in artificial saliva. After 7, 14 and 30 days of immersion, the inner root canal dentin of 8 teeth respectively from each group were sectioned to create dentin bars (1 X 1 mm, with 7 mm in length). Each dentin bar then was subjected to a three-point bending flexural test using MTS (Universal Testing Machine). Data gathered were then analyzed using two-way ANOVA, followed by Tukey's test with the level of significance of 95%. The results showed that exposure to calcium hydroxide either using calcium hydroxide mixed with sterile saline or UltraCal® for 14 and 30 days can reduce flexural strength of root canal dentin compared to control group (p0.05). It can be concluded that calcium hydroxide reduced the flexural strength of root canal dentin. The longer the exposure to calcium hydroxide would produce a greater effect on flexural strength of root canal dentin

DAYA ANTIBAKTERI PASTA CAMPURAN EKSTRAK KULIT NANAS (Ananas comosus) DAN CALCIUM HYDROXIDE SEBAGAI MEDIKAMEN INTRAKANAL TERHADAP Enterococcus faecalis

Latar belakang: Enterococcus faecalis merupakan bakteri yang paling sering ditemukan pada kegagalan perawatan saluran akar. Medikamen intrakanal digunakan untuk meningkatkan keberhasilan perawatan saluran akar. Bahan yang sering digunakan sebagai medikamen intrakanal adalah calcium hydroxide. Calcium hydroxide tidak efektif dalam mengeliminasi enterococcus faecalis, sehingga ditambahkan bahan antibakteri lain, seperti iodoform. Iodoform memiliki kekurangan dapat menimbulkan efek toksik pada jaringan. Kulit nanas memliki sifat sebagai antibakteri, karena memiliki kandungan zat aktif, seperti flavonoid, saponin, tanin, dan enzim bromelain. Berdasarkan sifat antibakteri yang dimiliki oleh kulit nanas, maka akan dilakukan penelitian untuk mengetahui daya antibakteri pasta campuran calcium hydroxide dan ekstrak kulit nanas terhadap Enterococcus faecalis. Tujuan: Mengetahui daya antibakteri pasta campuran ekstrak kulit nanas dan calcium hydroxide pada konsentrasi 6,25% dan 12,5% dengan rasio 1:1 dibandingkan dengan pasta calcium hydroxide 100% dan pasta campuran calcium hydroxide dan iodoform terhadap Enterococcus faecalis. Metode: Jenis penelitian yang dilakukan adalah eksperimental laboratoris. Kelompok sampel dibagi menjadi 2 kelompok kontrol (pasta calcium hydroxide 100% dan pasta campuran calcium hydroxide dan iodoform) dan 2 kelompok perlakuan (pasta campuran ekstrak kulit nanas pada konsentrasi 6,25% dan 12,5% dan calcium hydroxide dengan rasio 1:1). Metode yang digunakan adalah difusi agar. Data penelitian dianalisis menggunakan uji one way ANOVA. Hasil: Diameter zona hambat yang didapatkan secara berturut-turut dari A, B, C, dan D adalah 17,59 mm, 0 mm, 21,58, dan 19,8 mm. Simpulan: Pasta campuran ekstrak kulit nanas pada konsentrasi 6,25% dan 12,5% dan calcium hydroxide dengan rasio 1:1 memiliki daya antibakteri lebih tinggi dibandingkan dengan pasta calcium hydroxide 100% dan pasta campuran calcium hydroxide dan iodoform. Kata kunci: Calcium hydroxide, kulit nanas, daya hambat, Enterococcus faecalis, medikamen intrakana

Electrodeposited inorganic separators Second quarterly report, 15 Jul. - 15 Oct. 1965

Thin electrodeposited films of calcium and magnesium hydroxide as separators in silver-cadmium cell

Research and development on electrodeposited inorganic separators Third quarterly report, 15 Oct. 1965 - 15 Jan. 1966

Electrodeposited calcium hydroxide thin films for use as inorganic separators in silver-cadmium batterie