Root Surface Removal With Diamond-Coated Ultrasonic Instruments: An In Vitro and SEM Study

1996 ◽  
Vol 67 (12) ◽  
pp. 1281-1287 ◽  
Author(s):  
J. Eric Lavespere ◽  
Raymond A. Yukna ◽  
David A. Rice ◽  
Denis M. LeBlanc
Keyword(s):  
Root Surface ◽  
Sem Study ◽  
Surface Removal

Root surface removal and resultant surface texture with diamond-coated ultrasonic inserts: an in vitro and SEM study

2005 ◽  
Vol 32 (5) ◽  
pp. 467-473 ◽  
Author(s):  
Sotirios Vastardis ◽  
Raymond A. Yukna ◽  
David A. Rice ◽  
Don Mercante
Keyword(s):  
Surface Texture ◽  
Root Surface ◽  
Sem Study ◽  
Surface Removal

scholarly journals Phytase-Producing Rahnella aquatilis JZ-GX1 Promotes Seed Germination and Growth in Corn (Zea mays L.)

2021 ◽  
Vol 9 (8) ◽  
pp. 1647
Author(s):  
Gui-E Li ◽  
Wei-Liang Kong ◽  
Xiao-Qin Wu ◽  
Shi-Bo Ma
Keyword(s):  
Seed Germination ◽  
Plant Growth ◽  
Biomass Accumulation ◽  
Root Surface ◽  
Phosphorus Concentration ◽  
Maize Seedlings ◽  
Total Phosphorus Concentration ◽  
Rahnella Aquatilis ◽  
Maize Seeds

Phytase plays an important role in crop seed germination and plant growth. In order to fully understand the plant growth-promoting mechanism by Rahnella aquatilis JZ-GX1，the effect of this strain on germination of maize seeds was determined in vitro, and the colonization of maize root by R. aquatilis JZ-GX1 was observed by scanning electron microscope. Different inoculum concentrations and Phytate-related soil properties were applied to investigate the effect of R. aquatilis JZ-GX1 on the growth of maize seedlings. The results showed that R. aquatilis JZ-GX1 could effectively secrete indole acetic acid and had significantly promoted seed germination and root length of maize. A large number of R. aquatilis JZ-GX1 cells colonized on the root surface, root hair and the root interior of maize. When the inoculation concentration was 107 cfu/mL and the insoluble organophosphorus compound phytate existed in the soil, the net photosynthetic rate, chlorophyll content, phytase activity secreted by roots, total phosphorus concentration and biomass accumulation of maize seedlings were the highest. In contrast, no significant effect of inoculation was found when the total P content was low or when inorganic P was sufficient in the soil. R. aquatilis JZ-GX1 promotes the growth of maize directly by secreting IAA and indirectly by secreting phytase. This work provides beneficial information for the development and application of R. aquatilis JZ-GX1 as a microbial fertilizer in the future.

scholarly journals In Vitro Adhesion of Streptococcus sanguinis to Dentine Root Surface After Treatment with Er:Yag Laser, Ultrasonic System, or Manual Curette

2009 ◽  
Vol 27 (5) ◽  
pp. 735-741 ◽  
Author(s):  
Claudia Ota-Tsuzuki ◽  
Fernanda L. Martins ◽  
Ana Paula O. Giorgetti ◽  
Patrícia M. de Freitas ◽  
Poliana M. Duarte
Keyword(s):  
Er:Yag Laser ◽  
Root Surface ◽  
Laser Ultrasonic ◽  
Streptococcus Sanguinis ◽  
In Vitro Adhesion

Root surface debridement - an in vitro assessment

1988 ◽  
Vol 15 (5) ◽  
pp. 288-292 ◽  
Author(s):  
W. A. Cheetham ◽  
M. Wilson ◽  
J. B. Kieser
Keyword(s):  
Root Surface ◽  
In Vitro Assessment

Attachment of Oral Cytophaga Species to Hydroxyapatite-Containing Surfaces

1980 ◽  
Vol 29 (2) ◽  
pp. 768-777 ◽  
Author(s):  
Roger A. Celesk ◽  
Jack London
Keyword(s):  
Ethylenediaminetetraacetic Acid ◽  
Root Surface ◽  
Cell Suspensions ◽  
Model Systems ◽  
Proteinase K ◽  
Resting Cells ◽  
Streptococcus Sanguis ◽  
Number Of Binding Sites ◽  
Attachment Process

Model systems simulating the cementum portion of teeth were used to characterize the attachment process by which certain species of oral Cytophaga initiate the colonization of the tooth root surface in vitro. The adsorption of these bacteria to spheroidal hydroxyapatite beads and mechanically powdered root material followed Langmuir isotherm kinetics. From such data, the number of binding sites per 20 mg of substrate and the affinity constants were evaluated for two strains of Cytophaga sp. Resting cells of the two strains tested adhered relatively tenaciously to hydroxyapatite beads in numbers similar to those observed with cells of Streptococcus sanguis . Attachment of bacteria to the substrates was partially inhibited by (i) coating the substrates with human serum or saliva, (ii) pretreating cell suspensions with proteinase K or phospholipase C or D, or (iii) exposing the cells to temperatures greater than 60°C for 15 min. Treating resting cell suspensions with pronase, neuraminidase, phospholipase A2, or 0.1 M ethylenediaminetetraacetic acid had no effect on the attachment process.

scholarly journals Comparative Evaluation of Root Surface Changes by Air-Polishing using Glycine and Chlorhexidine Acetate Powder: An in-vitro Study

2017 ◽  
Vol 1 (1) ◽  
pp. 7-11
Author(s):  
Hardi Rajanbhai Shukla ◽  
Aditi Mathur ◽  
Neema Shetty ◽  
Barkha Makhijani ◽  
Balaji Manohar
Keyword(s):  
In Vitro Study ◽  
Root Surface ◽  
Periodontal Therapy ◽  
Vitro Study ◽  
Tooth Surface ◽  
Air Polishing ◽  
Biofilm Removal ◽  
Stain Removal ◽  
Surface Changes

Background: Biofilm removal is the central part of the etiotropic and maintenance phase of periodontal therapy. Commercially available injection water jets such as Prophy-Jet allows an efficient and convenient biofilm removal as an adjunct to mechanical periodontal therapy. But, due to the abrasive nature of traditionally used air polishing powders such as sodium bicarbonate, there is a continuous research going on for less abrasive materials. Aims: To compare the effectiveness of air polishing using glycine powder and chlorhexidine acetate powder on tooth surface as compared to ultrasonic scaling and also to evaluate the time taken for stain removal. Materials and Methods: Thirty fully erupted, single rooted teeth extracted due to poor periodontal prognosis were used in this in-vitro study. The sample teeth were divided into 3 equal groups and stained in coffee solution. The test Groups A and B underwent air-polishing with glycine powder and chlorhexidine acetate powder respectively. Group C was control group and underwent ultrasonic scaling. Time taken for stain removal was recorded. The sample teeth were also evaluated under a stereo-microscope and digital micrometer preprocedurally and post-procedurally to measure surface changes. Results: The study showed statistically significant results (p<0.05) when measurements of changes in surface roughness of samples treated with glycine powder air-polishing were compared with ultrasonic scaling and chlorhexidine acetate powder air-polishing were compared with ultrasonic scaling. Surface texture loss as well as time taken for stain removal was minimum with glycine powder and maximum with ultrasonic scaling. Conclusion: Air-polishing with glycine powder was least abrasive on root surface followed by chlorhexidine acetate powder air-polishing. This is because of the lower particle size of glycine which also covers larger area in lesser time.  

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