scholarly journals Masticatory Path Patterns and Stability before and after Denture Treatment

2010 ◽  
Vol 17 (1) ◽  
pp. 1-5
Author(s):  
Ichiro Arakawa ◽  
Hiroshi Shiga ◽  
Yoshinori Kobayashi ◽  
Kazue Mizuuchi ◽  
Atsushi Watanabe ◽  
...  
Keyword(s):  
Before And After ◽  
Denture Treatment

scholarly journals Salivary clearance of sugar before and after insertion of fixed partial dentures

2010 ◽  
Vol 4 (3) ◽  
pp. 475-478
Author(s):  
Serpil Karaoglanoglu ◽  
Zeynep Yesil Duymus ◽  
Nilgun Akgul ◽  
Nur Ozdabak ◽  
Nilgun Seven ◽  
...  
Keyword(s):  
Organic Acids ◽  
Tooth Enamel ◽  
Sucrose Solution ◽  
Sucrose Concentration ◽  
Carbohydrate Intake ◽  
Carious Lesions ◽  
Before And After ◽  
Time Required ◽  
Male Subjects ◽  
Denture Treatment

Abstract Background: The development of carious lesions is dependent on the presence of acid-producing microflora in the mouth. The activity of these plaque bacteria is dependent on sugar, which diffuses from the saliva following carbohydrate intake. The sugar serves as a substrate for fermentation, producing organic acids that demineralize tooth enamel. Elimination of the sugar from the mouth is accomplished by dilution with newly secreted saliva, a process generally referred to as sugar clearence. Objectives: Determine if fixed partial prosthodontic treatment affects the length of salivary sugar clearance. Materials and methods: Fifteen male subjects age between 21 and 32, and requiring 10 porcelain fixed partial dentures were included in this study. Before receiving their dentures, the subjects, rinsed with a 10% sucrose solution for 30 seconds then gave saliva samples. The prpcedure was repeated one month after the dentures were put in place. The length of sugar clearance was calculated. Results: Salivary sugar was cleared in 14.89±0.89 minutes before the denture application and in 18.86± 0.90 minutes after denture treatment. The initial sucrose concentration was 113.63±1.29 mmol/L before the dentures and 142.99±10.82 mmol/L after the dentures. Conclusion: The use of fixed partial dentures does not affect the time required to clear salivary sugar or the level of the initial sucrose concentration.

scholarly journals Tulang alveolar pasca perawatan jembatan ditinjau dari radiografi periapikalAlveolar bone after bridge treatment in terms of periapical radiography

2020 ◽  
Vol 4 (1) ◽  
pp. 9
Author(s):  
Celine Hestiana ◽  
Ria Noerianingsih Firman ◽  
Deddy Firman
Keyword(s):  
Bone Loss ◽  
Alveolar Bone ◽  
Alveolar Bone Loss ◽  
Gingival Inflammation ◽  
Probing Depth ◽  
Before And After ◽  
Dental Hospital ◽  
Bone Height ◽  
Periapical Radiography ◽  
Denture Treatment

Pendahuluan: Radiografi periapikal dapat digunakan untuk mendeteksi tulang alveolar pada perawatan gigi tiruan jembatan. Pembuatan gigi tiruan jembatan harus memenuhi syarat-syarat biologis. Apabila adaptasi marginal buruk, penempatan margin intracrevicular terlalu dalam, permukaan restorasi yang kasar dan restorasi yang overkontur dapat menyebabkan peradangan lokal seperti inflamasi gingiva, peningkatan kedalaman probing dan kehilangan tulang alveolar. Tujuan penelitian ini untuk mengetahui bagaimana deskripsi tulang alveolar pasca perawatan jembatan di RSGM UNPAD ditinjau dari radiografi periapikal. Metode: Jenis penelitian deskriptif dengan populasi adalah seluruh hasil radiograf periapikal pada pasien sebelum dan sesudah perawatan jembatan posterior yang datang ke RSGM Unpad dan sampel adalah radiograf sebelum dan sesudah perawatan jembatan posterior sebanyak 17 pasien setelah insersi 1 minggu dan 2 pasien setelah insersi 4 minggu. Pengukuran ketinggian tulang alveolar menggunakan Metode Proksimal RABL (Radiographic Alveolar Bone Loss) yang dihitung memakai jangka sorong. Hasil : Kehilangan tulang alveolar setelah insersi 1 minggu pada mesial dan distal yaitu 0,003 mm, setelah insersi 2 minggu 0,007 mm pada mesial dan 0,025 pada distal,setelah insersi 3 minggu 0,025 mm pada mesial dan 0,019 mm pada distal, setelah insersi 4 minggu 0,075 mm mesial dan 0,063 mm distal. Simpulan: Pasca perawatan jembatan, ditinjau dari radiografi periapikal, terdapat kehilangan tulang alveolar ringan berdasarkan metode proksimal RABL.Kata kunci : Gigi tiruan jembatan, radiograf periapikal, tulang alveolar. ABSTRACTIntroduction: Periapical radiography can be used to detect alveolar bone in bridge denture treatment. The making of bridge denture must fulfil biological requirements. Poor marginal adaptation will lead to deeper intracrevicular margin placement, rough surfaces, over contour restoration can cause local inflammation such as gingival inflammation, increased probing depth and alveolar bone loss. The purpose of this research was to know the description of alveolar bone after bridge denture treatment reviewed through periapical radiography. Methods: This research was descriptive with the population of all radiograph periapical treatment of posterior bridge in Universitas Padjadjaran Dental Hospital and the sample was radiograph periapical before and after bridge treatment of as much as 17 patients after 1-week insertion and 2 patients after 4-weeks insertion.  Alveolar bone height measurements was carried out using the RABL (Radiographic Alveolar Bone Loss) proximal method calculated using the Vernier callipers. Results: The results indicated that alveolar bone loss occurred after 1-week insertion on the mesial and distal was 0.003 mm; after 2-weeks insertion was 0.007 mm on the mesial and 0.025 mm on the distal; after 3-weeks insertion was 0.025 mm on the mesial and 0.019 mm on the distal; and after 4-weeks insertion was 0.075 mm on the mesial and 0.063 mm on the distal. Conclusion: Post bridge treatment, in terms of periapical radiography, found a mild alveolar bone loss based on the proximal RABL method.  Keywords: Bridge denture, periapical radiograph, alveolar bone.

scholarly journals Masticatory Performance and Masseter Muscle Activities before and after Denture Treatment

2010 ◽  
Vol 17 (1) ◽  
pp. 6-10
Author(s):  
Masaoki Yokoyama ◽  
Hiroshi Shiga ◽  
Yoshinori Kobayashi ◽  
Shigehisa Fujii ◽  
Akira Uehama ◽  
...  
Keyword(s):  
Masseter Muscle ◽  
Masticatory Performance ◽  
Before And After ◽  
Denture Treatment

Deformation Replication

1970 ◽  
Vol 28 ◽  
pp. 280-281
Author(s):  
J. Temple Black
Keyword(s):  
Cutting Speed ◽  
Machining Process ◽  
Depth Of Cut ◽  
Rake Face ◽  
Orthogonal Machining ◽  
Aluminum Chips ◽  
Before And After ◽  
Materials Used ◽  
Glass Knife ◽  
Very High

Tool materials used in ultramicrotomy are glass, developed by Latta and Hartmann (1) and diamond, introduced by Fernandez-Moran (2). While diamonds produce more good sections per knife edge than glass, they are expensive; require careful mounting and handling; and are time consuming to clean before and after usage, purchase from vendors (3-6 months waiting time), and regrind. Glass offers an easily accessible, inexpensive material ($0.04 per knife) with very high compressive strength (3) that can be employed in microtomy of metals (4) as well as biological materials. When the orthogonal machining process is being studied, glass offers additional advantages. Sections of metal or plastic can be dried down on the rake face, coated with Au-Pd, and examined directly in the SEM with no additional handling (5). Figure 1 shows aluminum chips microtomed with a 75° glass knife at a cutting speed of 1 mm/sec with a depth of cut of 1000 Å lying on the rake face of the knife.

The Clinical, Roentgenological and Morphological Effects of an Acute Exposure of Phosgene on the Lungs of Dogs

1971 ◽  
Vol 29 ◽  
pp. 236-237
Author(s):  
R. F. Bils ◽  
W. F. Diller ◽  
F. Huth
Keyword(s):  
Latent Period ◽  
Chemical Industry ◽  
Toxic Substance ◽  
Lung Edema ◽  
X Rays ◽  
Beagle Dogs ◽  
Male And Female ◽  
Morphological Alterations ◽  
Before And After ◽  
Electron Microscopes

Phosgene still plays an important role as a toxic substance in the chemical industry. Thiess (1968) recently reported observations on numerous cases of phosgene poisoning. A serious difficulty in the clinical handling of phosgene poisoning cases is a relatively long latent period, up to 12 hours, with no obvious signs of severity. At about 12 hours heavy lung edema appears suddenly, however changes can be seen in routine X-rays taken after only a few hours' exposure (Diller et al., 1969). This study was undertaken to correlate these early changes seen by the roengenologist with morphological alterations in the lungs seen in the'light and electron microscopes.Forty-two adult male and female Beagle dogs were selected for these exposure experiments. Treated animals were exposed to 94.5-107-5 ppm phosgene for 10 min. in a 15 m3 chamber. Roentgenograms were made of the thorax of each animal before and after exposure, up to 24 hrs.

Ultrastructure of Melanin Formation in Curvularia sp., Alternaria sp., and Drechslera Sorokiniana

1977 ◽  
Vol 35 ◽  
pp. 398-399
Author(s):  
M. H. Wheeler ◽  
W. J. Tolmsoff ◽  
A. A. Bell
Keyword(s):  
Potassium Phosphate ◽  
Thielaviopsis Basicola ◽  
Wild Type ◽  
Potassium Phosphate Buffer ◽  
Transmission Microscopy ◽  
Electron Transmission ◽  
Melanin Formation ◽  
Before And After ◽  
Alternaria Sp ◽  
Electron Transmission Microscopy

(+)-Scytalone [3,4-dihydro-3,6,8-trihydroxy-l-(2Hj-naphthalenone] and 1,8-di- hydroxynaphthalene (DHN) have been proposed as intermediates of melanin synthesis in the fungi Verticillium dahliae (1, 2, 3, 4) and Thielaviopsis basicola (4, 5). Scytalone is enzymatically dehydrated by V. dahliae to 1,3,8-trihydroxynaphthalene which is then reduced to (-)-vermelone [(-)-3,4- dihydro-3,8-dihydroxy-1(2H)-naphthalenone]. Vermelone is subsequently dehydrated to DHN which is enzymatically polymerized to melanin.Melanin formation in Curvularia sp., Alternaria sp., and Drechslera soro- kiniana was examined by light and electron-transmission microscopy. Wild-type isolates of each fungus were compared with albino mutants before and after treatment with 1 mM scytalone or 0.1 mM DHN in 50 mM potassium phosphate buffer, pH 7.0. Both chemicals were converted to dark pigments in the walls of hyphae and conidia of the albino mutants. The darkened cells were similar in appearance to corresponding cells of the wild types under the light microscope.

Evaluation of Freezing Methods by Low Temperature X-Ray Diffraction

1977 ◽  
Vol 35 ◽  
pp. 330-333
Author(s):  
T. Gulik-Krzywicki ◽  
M.J. Costello
Keyword(s):  
Biological Materials ◽  
Molecular Organization ◽  
X Ray Diffraction ◽  
Glass Capillary ◽  
X Ray ◽  
Rate Dependent ◽  
Before And After ◽  
Freeze Etching ◽  
Diffraction Patterns ◽  
Set Up

Freeze-etching electron microscopy is currently one of the best methods for studying molecular organization of biological materials. Its application, however, is still limited by our imprecise knowledge about the perturbations of the original organization which may occur during quenching and fracturing of the samples and during the replication of fractured surfaces. Although it is well known that the preservation of the molecular organization of biological materials is critically dependent on the rate of freezing of the samples, little information is presently available concerning the nature and the extent of freezing-rate dependent perturbations of the original organizations. In order to obtain this information, we have developed a method based on the comparison of x-ray diffraction patterns of samples before and after freezing, prior to fracturing and replication.Our experimental set-up is shown in Fig. 1. The sample to be quenched is placed on its holder which is then mounted on a small metal holder (O) fixed on a glass capillary (p), whose position is controlled by a micromanipulator.

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