scholarly journals In vivo effect of antibacterial and fluoride-releasing adhesives on enamel demineralization around brackets: A micro-CT study

2017 ◽  
Vol 87 (6) ◽  
pp. 841-846 ◽  
Author(s):  
Aslihan Zeynep Oz ◽  
Abdullah Alper Oz ◽  
Sabahat Yazıcıoglu
Keyword(s):  
Orthodontic Treatment ◽  
In Vivo Study ◽  
White Spot Lesion ◽  
Micro Ct ◽  
Preventive Effect ◽  
Orthodontic Bracket ◽  
Enamel Demineralization ◽  
Significant Difference ◽  
Preventive Effects

ABSTRACT Objectives: The aim of this in vivo study was to investigate the preventive effect of two different adhesives on enamel demineralization and compare these adhesives with a conventional one. Materials and Methods: Fifteen patients requiring the extraction of their first four premolars for orthodontic treatment were included in the study. One premolar was randomly selected, and an antibacterial monomer-containing and fluoride-releasing adhesive (Clearfil Protect Bond, Kuraray Medical, Okayama, Japan) was used for orthodontic bracket bonding. Another premolar was randomly selected, and a fluoride-releasing and recharging orthodontic adhesive (Opal Seal, Ultradent Products, South Jordan, Utah) was used. One premolar was assigned as a control, and a conventional adhesive (Transbond XT, 3M Unitek, Monrovia, Calif) was used. The teeth were extracted after 8 weeks, and the demineralization areas of the 45 extracted teeth were analyzed using microcomputed tomography with software. Results: There was no significant difference between the white spot lesion (WSL) rates of the adhesives (P > .05). The volumes of the WSLs varied from 0 to 0.019349 mm3. Although Opal Seal showed the smallest lesion volumes, there was no significant difference in volumetric measurements of the lesions among the groups (P > .05). Conclusions: The findings indicated no significant differences between the preventive effects of the adhesives used in this in vivo study over 8 weeks.

scholarly journals Enamel demineralization around two different orthodontic bracket adhesive systems: An in vivo study

2019 ◽  
Vol 31 (1) ◽  
pp. 99-104 ◽  
Author(s):  
Naif A. Almosa ◽  
Abdulmohsen M. Alqasir ◽  
Mohammad A. Aldekhayyil ◽  
Abdullah Aljelayel ◽  
Mohammed A. Aldosari
Keyword(s):  
In Vivo Study ◽  
Adhesive Systems ◽  
Orthodontic Bracket ◽  
Enamel Demineralization

Clinical Evaluation of Enamel Demineralization during Orthodontic Treatment: An in vivo Study using GC Tooth Mousse Plus

2014 ◽  
Vol 48 (4) ◽  
pp. 233-238
Author(s):  
Yatishkumar S Joshi ◽  
Krishna Nayak ◽  
Nishanth Kuttappa ◽  
Ryan Menezes ◽  
Pravinkumar Marure ◽  
...  
Keyword(s):  
Clinical Evaluation ◽  
Orthodontic Treatment ◽  
In Vivo Study ◽  
Enamel Demineralization ◽  
Tooth Mousse

Clinical Evaluation of Enamel Demineralization during Orthodontic Treatment: An in vivo Study using GC Tooth Mousse Plus

2014 ◽  
Vol 48 ◽  
pp. 233-238 ◽  
Author(s):  
Yatishkumar S Joshi ◽  
Krishna Nayak ◽  
Nishanth Kuttappa ◽  
Ryan Menezes ◽  
Pravinkumar Marure ◽  
...  
Keyword(s):  
Clinical Evaluation ◽  
Orthodontic Treatment ◽  
In Vivo Study ◽  
Enamel Demineralization ◽  
Tooth Mousse

scholarly journals Clinical evaluation of the failure rate of metallic brackets bonded with orthodontic composites

2012 ◽  
Vol 23 (4) ◽  
pp. 399-402 ◽  
Author(s):  
Fábio Lourenço Romano ◽  
Rodrigo Alexandre Valério ◽  
Jaciara Miranda Gomes-Silva ◽  
José Tarcísio Lima Ferreira ◽  
Gisele Faria ◽  
...  
Keyword(s):  
Failure Rate ◽  
Orthodontic Treatment ◽  
Color Change ◽  
Rank Test ◽  
Initial Alignment ◽  
Bond Failure ◽  
Log Rank Test ◽  
Significant Difference ◽  
Mandibular Teeth

The purpose of the present study was to evaluate in vivo the failure rate of metallic brackets bonded with two orthodontic composites. Nineteen patients with ages ranging from 10.5 to 38.7 years needing corrective orthodontic treatment were selected for study. The enamel surfaces from second premolars to second premolars were treated with Transbond Plus-Self Etching Primer (3M Unitek). Next, 380 orthodontic brackets were bonded on maxillary and mandibular teeth, as follows: 190 with Transbond XT composite (3M Unitek) (control) and 190 with Transbond Plus Color Change (3M Unitek) (experimental) in contralateral quadrants. The bonded brackets were light cured for 40 s, and initial alignment archwires were inserted. Bond failure rates were recorded over a six-month period. At the end of the evaluation, six bond failures occurred, three for each composite. Kaplan-Meyer method and log-rank test (Mantel-Cox) was used for statistical analysis, and no statistically significant difference was found between the materials (p=0.999). Both Transbond XT and Transbond Plus Color Change composites had low debonding rates over the study period.

scholarly journals Capacity of Human Nisin- and Pediocin-Producing Lactic Acid Bacteria To Reduce Intestinal Colonization by Vancomycin-Resistant Enterococci

2008 ◽  
Vol 74 (7) ◽  
pp. 1997-2003 ◽  
Author(s):  
Mathieu Millette ◽  
Gilbert Cornut ◽  
Claude Dupont ◽  
François Shareck ◽  
Denis Archambault ◽  
...  
Keyword(s):  
Lactic Acid ◽  
Lactic Acid Bacteria ◽  
In Vivo Study ◽  
Control Group ◽  
Intestinal Colonization ◽  
Strong Activity ◽  
Vancomycin Resistant Enterococci ◽  
Significant Difference ◽  
Vancomycin Resistant

ABSTRACT This study demonstrated the capacity of bacteriocin-producing lactic acid bacteria (LAB) to reduce intestinal colonization by vancomycin-resistant enterococci (VRE) in a mouse model. Lactococcus lactis MM19 and Pediococcus acidilactici MM33 are bacteriocin producers isolated from human feces. The bacteriocin secreted by P. acidilactici is identical to pediocin PA-1/AcH, while PCR analysis demonstrated that L. lactis harbors the nisin Z gene. LAB were acid and bile tolerant when assayed under simulated gastrointestinal conditions. A well diffusion assay using supernatants from LAB demonstrated strong activity against a clinical isolate of VRE. A first in vivo study was done using C57BL/6 mice that received daily intragastric doses of L. lactis MM19, P. acidilactici MM33, P. acidilactici MM33A (a pediocin mutant that had lost its ability to produce pediocin), or phosphate-buffered saline (PBS) for 18 days. This study showed that L. lactis and P. acidilactici MM33A increased the concentrations of total LAB and anaerobes while P. acidilactici MM33 decreased the Enterobacteriaceae populations. A second in vivo study was done using VRE-colonized mice that received the same inocula as those in the previous study for 16 days. In L. lactis-fed mice, fecal VRE levels 1.73 and 2.50 log10 CFU/g lower than those in the PBS group were observed at 1 and 3 days postinfection. In the P. acidilactici MM33-fed mice, no reduction was observed at 1 day postinfection but a reduction of 1.85 log10 CFU/g was measured at 3 days postinfection. Levels of VRE in both groups of mice treated with bacteriocin-producing LAB were undetectable at 6 days postinfection. No significant difference in mice fed the pediocin-negative strain compared to the control group was observed. This is the first demonstration that human L. lactis and P. acidilactici nisin- and pediocin-producing strains can reduce VRE intestinal colonization.

Single‐staged implant placement using the bone ring technique with and without membrane placement: Micro‐CT analysis in a preclinical in vivo study

2019 ◽  
Vol 31 (1) ◽  
pp. 29-36 ◽  
Author(s):  
Ken Nakahara ◽  
Maiko Haga‐Tsujimura ◽  
Kensuke Igarashi ◽  
Eizaburo Kobayashi ◽  
Benoit Schaller ◽  
...  
Keyword(s):  
In Vivo Study ◽  
Micro Ct ◽  
Implant Placement ◽  
Ct Analysis

scholarly journals Ex vivo and in vivo study of Kowa HA-2 applanation tonometer in the measurement of intraocular pressure in cats

2017 ◽  
Vol 38 (6) ◽  
pp. 3647
Author(s):  
Claudia Lizandra Ricci ◽  
Rogério Giuffrida ◽  
Glaucia Prada Kanashiro ◽  
Hilidia Stephania Rufino Belezzi ◽  
Carolina De Carvalho Bacarin ◽  
...  
Keyword(s):  
Intraocular Pressure ◽  
Ex Vivo ◽  
Clinical Signs ◽  
In Vivo Study ◽  
Eye Drops ◽  
Significant Difference ◽  
Applanation Tonometer ◽  
Ex Vivo Study ◽  
Healthy Eyes

The objective of this study was to evaluate the use of the Kowa HA-2 applanation tonometer in measuring intraocular pressure (IOP) in cats. Ten healthy eyes were used in an ex vivo study in which the calibration curve for manometry vs. tonometry was determined by artificially raising the IOP in 5 mmHg increments up to 60 mmHg (10-60 mmHg). Both eyes of 10 anesthetized cats were studiedin vivo to compare manometry vs. tonometry. In the ambulatory study, 78 healthy eyes, 7 eyes with glaucoma and 20 eyes with uveitis were evaluated by tonometry, which was performed with topical anesthesia and 1% fluorescein eye drops for the formation of fluorescein semicircles. The correlation coefficient (r²) between the manometer and the Kowa HA-2 tonometer was 0.993 and the linear regression equation was y = 0.0915x + 0.0878 in the ex-vivo study. In the in vivo study, the IOP values (mean±SD, in mmHg) in manometry were 15.6 ± 1.1(14.0 – 17.5) and in tonometry were 15.5 ± 1.2(13.5 – 17.2), with no significant difference (P > 0.05) between manometry and tonometry. In ambulatory study, using the Kowa HA-2 tonometer, the IOP values (mean±SD, in mmHg) were 15.0 ± 1.5 (11.8 – 18.3) for the healthy eyes, 38.4 ± 8.1(29.6 – 53.7) for glaucomatous eyes and 10.4 ± 2.0(5.3 – 12.2) for eyes with uveitis. There was a strong correlation and accuracy between the IOP values with the manometry and the Kowa HA-2 tonometer. In the ambulatorystudy the IOP values obtained with the tonometer were compatible for animals with healthy eyes and with clinical signs of glaucoma and uveitis. We conclude that the Kowa HA-2 tonometer can be used in the measurement of IOP in cats, since it is a practical and accurate method in this species.

scholarly journals Comparison of Orthodontic Bracket Debonding Force and Bracket Failure Pattern on Different Teeth In Vivo by a Prototype Debonding Device

2021 ◽  
Vol 2021 ◽  
pp. 1-7
Author(s):  
Tamzid Ahmed ◽  
Norma Ab Rahman ◽  
Mohammad Khursheed Alam
Keyword(s):  
Failure Pattern ◽  
Point Scale ◽  
Orthodontic Bracket ◽  
Adhesive Remnant Index ◽  
Significant Difference ◽  
Different Types ◽  
Post Hoc ◽  
Bracket Failure ◽  
One Way Anova

Objective. To compare the orthodontic bracket debonding force and assess the bracket failure pattern clinically between different teeth by a validated prototype debonding device. Materials and Method. Thirteen (13) patients at the end of comprehensive fixed orthodontic treatment, awaiting for bracket removal, were selected from the list. A total of 260 brackets from the central incisor to the second premolar in both jaws were debonded by a single clinician using a validated prototype debonding device equipped with a force sensitive resistor (FSR). Mean bracket debonding forces were specified to ten (10) groups of teeth. Following debonding, Intraoral microphotographs of the teeth were taken by the same clinician to assess the bracket failure pattern using a 4-point scale of adhesive remnant index (ARI). Statistical analysis included one-way ANOVA with post hoc Tukey HSD and independent sample t -test to compare in vivo bracket debonding force, Cohen’s kappa ( κ ), and a nonparametric Kruskal-Wallis test for the reliability and the assessment of ARI scoring. Results. A significant difference ( p < 0.001 ) of mean debonding force was found between different types of teeth in vivo. Clinically, ARI scores were not significantly different ( p = 0.921 ) between different groups, but overall higher scores were predominant. Conclusion. Bracket debonding force should be measured on the same tooth from the same arch as the significant difference of mean debonding force exists between similar teeth of the upper and lower arches. The insignificant bracket failure pattern with higher ARI scores confirms less enamel damage irrespective of tooth types.

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