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Composite bond strength of one and two - step adhesive systems used for restorations on primary teeth using varying acid etch application timesKlus, Bradley 19 August 2014 (has links)
The objective of this study was to determine whether the composite bond strength
acquired using a single step self-etching bonding system is as or more effective when compared to the two step etch-rinse-bond system at clinically relevant in-vitro standards.
A total of 80 extracted human deciduous with at least one intact smooth surface were collected with parental consent. Collected teeth were randomly assigned to one of four treatment protocols (n=20): single step self-etch (Adper Prompt L-Pop, 3M ESPE), two step etch (15s)-rinse-bond (Optibond Solo Plus, Kerr), single step self etch (Adper L Pop, 3M ESPE) with 30s pre-etch, and two step etch (30s)-rinse-bond (Optibond Solo Plus, Kerr). A composite cylinder of uniform shape was bonded to each tooth using the designated adhesive system and specimens were tested with a universal testing machine. Descriptive statistics and statistical analysis was performed.
Median shear bond strengths for all specimens, regardless of treatment group, ranged from 3.25 MPa to 43.13 MPa. These values are above suggested minimum clinical required values of 3MPa. A Kruskal-Wallis analysis between treatment groups found statistical significance (p<0.05) for shear bond strength between the groups and both one step system protocols, had higher mean and median shear bond strength values than the two step systems.
An adhesive remnant index (ARI) was analyzed to confirm uniform adhesive fracture between all four treatment groups. Both a Fisher’s exact test, and a Hantel-Haenszel statistic found no significant difference (p<0.05) between the samples.
Based on these findings we concluded that:
1. The ARI score for all treatment groups was not statistically significant, suggesting that the type of bond breakage was consistent regardless of adhesive system used.
2. Both Optibond Solo Plus and Adper Prompt L-Pop systems achieve adequate shear bond strengths as described by current literature.
3. The use of a one-step system to save chair time and aid in patient behavior management may be clinically useful.
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Assessment of redosing with oral and intranasal midazolam for the conscious sedation of pediatric dental patients a thesis submitted in partial fulfillment ... for the degree of Master of Science in Pediatric Dentistry ... /Fields, Jena M. January 2005 (has links)
Thesis (M.S.)--University of Michigan, 2005. / Includes bibliographical references.
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Geographic distribution of potential pediatric dental service locations in Michigan : a workforce analysis a thesis submitted in partial fulfillment ... for the degree of Master of Science in Pediatric Dentistry ... /Thomas, James M. January 2005 (has links)
Thesis (M.S.)--University of Michigan, 2005. / Includes bibliographical references.
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âO uso da clorexidina intracanal em molares decÃduos com necrose pulpar â estudo clÃnico e microbiolÃgicoâ / Intracanal chlorhexidine in primary molars with pulp necrosis- a clinical and microbiological studyRamille AraÃjo Lima 08 October 2009 (has links)
FundaÃÃo de Amparo à Pesquisa do Estado do Cearà / O sucesso do tratamento endodÃntico depende de muitos fatores, sendo a reduÃÃo ou eliminaÃÃo da infecÃÃo bacteriana o mais importante desses fatores. Portanto, o uso de substÃncias capazes de agir nesses microorganismos e em seus subprodutos torna-se uma etapa importantÃssima no tratamento. O objetivo deste ensaio clÃnico âsplit-mouthâ foi comparar a eficÃcia da clorexidina gel 1% e do hidrÃxido de cÃlcio associado ao paramonoclorofenol canforado (Callen PMCCÂ), como medicaÃÃo intracanal, e do tratamento executado em sessÃo Ãnica (grupo controle), contra Estreptococos do grupo mutans (EGM) e bactÃrias anaerÃbias presentes no interior dos canais radiculares de molares decÃduos com necrose pulpar. Um total de 21 crianÃas (37 dentes) participou do estudo. Amostras iniciais (prÃ-tratamento) e finais (apÃs a permanÃncia das substÃncias por 14 dias no interior dos canais) foram coletadas para anÃlise microbiolÃgica e incubadas em placas de Mitis Salivarius Bacitracina, em aerofilia, para a observaÃÃo dos nÃveis de EGM, assim como em placas de Brucella Ãgar, em anaerobiose, para verificaÃÃo de bactÃrias anaerÃbias. Os nÃveis de sucesso da pulpectomia apÃs um perÃodo de acompanhamento de atà 12 meses foram analisados baseados em parÃmetros clÃnicos e radiogrÃficos. A clorexidina gel a 1% reduziu significantemente os nÃveis de EGM (p= 0,010, teste de Wilcoxon) e o Callen PMCC reduziu significantemente os nÃveis de bactÃrias anaerÃbias (p=0,002, teste de Wilcoxon). Observou-se diferenÃa significativa na comparaÃÃo da reduÃÃo dos nÃveis de EGM obtidos pelo grupo da clorexidina e pelo controle (p=0,032, Mann-Whitney). A taxa de sucesso do tratamento foi de 81,71% no grupo do Callen PMCCÂ, 78,57% para o grupo da clorexidina gel 1% e 77,77% no grupo controle. Concluiu-se que a clorexidina gel a 1%, assim como o hidrÃxido de cÃlcio associado ao paramonoclorofenol canforado, possui eficÃcia limitada na reduÃÃo de bactÃrias dos canais radiculares decÃduos infectados. Os presentes resultados sugerem que uma possÃvel associaÃÃo entre as medicaÃÃes testadas em estudos futuros pode eliminar de maneira mais eficaz estas bactÃrias. / The success of endodontic treatment depends on many factors, and the reduction or elimination of bacterial infection is the most important one. Therefore, the use of substances that act against these microorganisms and their products becomes an important stage in treatment. The aim of this in vivo split-mouth study was to compare the efficacy of a 1% chlorhexidine gel, calcium hydroxide/camphorated paramonochlorophenol (Callen PMCCÂ) as intracanal medications, and a Control group (1-visit endodontic treatment) against mutans streptococci (EGM) and anaerobic bacteria found in primary molars with necrotic pulps. A total of 21 children (37 teeth) participated in this study. Initial (pre-treatment) and final (14 days post-treatment) intra-canal samples were collected for microbiological analysis and were incubated in Mitis Salivarius Bacitracin plates under microaerophilic conditions for EGM counting; as well as in Brucella-agar plates, anaerobically, to allow growth of anaerobic bacteria. The success rate of the pulpectomies after a 12 months follow-up were also evaluated based on clinical and radiographic parameters. Chlorhexidine gel significantly reduced EGM levels (p=0,010, Wilcoxon test), whereas Callen PMCC significantly reduced anaerobic bacteria levels (p=0,002). Significant difference was observed when comparing EGM reduction levels between the Chlorhexidine and Control groups (p=0,032, Mann-Whitney test). The success rate was 81,71% in the Callen PMCC group, 78.57% in the Chlorhexidine group and 77.77% in the control group. We concluded that 1% chlorhexidine gel, as well as calcium hydroxide/camphorated paramonochlorophenol, has limited efficacy in the reduction of bacteria from deciduous infected root canals. The present results suggest that a possible association between these two medications in future studies may eliminate more efficiently these bacteria.
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Factors Associated with Repeat Dental Treatment Under General Anesthesia: A Case-Control StudyYoshioka, Misa Lynn January 2021 (has links)
No description available.
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Effects of chocolate milk on dental caries under mouth simulation conditionsSimmons, Frederick H., Jr. January 1976 (has links)
Indiana University-Purdue University Indianapolis (IUPUI) / Dietary recommendations concerning chocolate milk remain controversial
since the effect of chocolate milk on the dental caries process is not clear.
Cocoa with antibacterial and enamel-solubility-reducing properties may inhibit
the formation of dental caries. Since chocolate milk contains a significant
amount of sucrose (about 5 percent) and some cocoa (1 percent),
laboratory testing of the cariogenicity of chocolate milk seems valuable.
The present study investigated whether or not under mouth simulation
conditions chocolate milk influenced the formation of dental caries compared
to white milk.
A control solution, four milk solutions and a milk solution with toothbrushing
were tested over a 20-week experimental period. A mouth-like environment
was established by constructing a mouth simulating device. One-hundred-
and-sixty-two-teeth were mounted in the mouth simulator in six groups
of 27 teeth each. Two independent evaluators had certified the teeth to
be caries-free and a computer program was used to ensure complete randomization
of the teeth in groups.
After initial sterilization by ethylene oxide, the teeth were inoculated
with a mixture of a culture of Streptococcus mutans and saliva. Each group
was exposed to one of the milk formulations for a 15 minute period twice
daily. After each period, a sterile bacterial medium was dripped (8 to
12 mls/hr) over the teeth in the mouth-like environment.
After 20 weeks the teeth were separated, coded, and re-evaluated
for pit and fissure caries by the same two evaluators. A statistical
analysis by Repeated t Tests indicated the presence of three levels of
relative cariogenicity: the chocolate milk group had the highest caries
rate, the control group and the white milk group were intermediate and
the chocolate milk with brushing group showed a marked reduction in
dental caries. The results of two other groups were invalidated.
In summary, for pit and fissure dental caries under the conditions
tested in the mouth simulating device, chocolate milk exhibited a significant
cariogenic potential relative to white milk, especially in the
early incipient caries stage.
It may be concluded from this study that in an individual with high
dental caries susceptibility, it would seem unwise to recommend frequent
ingestion of chocolate milk, unless proper and immediate oral hygiene
follows the ingestion.
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Dental developmental age versus chronological age as predictors of children's functioning in five developmental skill areasBarton, Douglas Harvey January 1971 (has links)
Indiana University-Purdue University Indianapolis (IUPUI) / The purpose of this study was to test the relationship
between dental developmental age and chronologic age as
they relate to other aspects of the child's development.
The dental developmental age was determined on 74 children,
40 males and 34 females, ranging in age from two to 11 years.
The sample population was chosen at random from patients at
the Indiana University School of Dentistry. The socio-economic
status was determined according to the North-Hatt
Occupational Scale; 14.3 per cent of the children fell in
the upper class, 84.3 per cent in the middle class, and
1.4 per cent in the lower class. Analysis by race showed
that 71.6 per cent of the sample were Caucasian, 23.0 per cent
were Negroid, and 5.4 per cent were Oriental. Panoramic
radiography, with the S.S. White Panorex, was used to evaluate
dental developmental age. Two independent observers scored
the radiographs and double blind procedures were used. To
determine dental developmental age, Wolanski's method of
tooth formation evaluation was used. To determine functioning
of children in five developmental skills areas, the Alpern-Boll
Developmental Skills Inventory was used.
Dental developmental age and chronologic age had a
significant positive relationship to children's functioning
in five developmental skills areas. There is a chronologic
period when determination of dental age appears to be
difficult. The data available and methodology for determining
dental developmental age of the four-year-old female and
the five-year-old male seems to be inadequate.
Dental developmental age seems to be a better predictor
of general developmental skills for males than it does for
females, specifically in the two to eight-year-old group.
The highest correlations were found in the youngest age
group, i.e. the two to five-year-olds. The correlations
between dental developmental age and chronologic age, and
between those two indices and the five developmental skills
ages remains highly significant in the younger ages but
decreases consistently as the child becomes older. The
specific age as well as the sex of the child has a definite
effect on the correlations obtained.
The use of dental developmental age is good but not
superior to the use of chronologic age for predicting
functioning for normal children. This may not be the case
for atypical children. More study is indicated.
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The occlusion of children as related to water fluoride concentration and socioeconomic statusDavis, Walter Ray, Jr., 1934- January 1963 (has links)
Indiana University-Purdue University Indianapolis (IUPUI)
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Quality and Performance Measures in Pediatric DentistryJohnson, Christian Marie 29 August 2013 (has links)
No description available.
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GENETIC VARIATIONS OF CYP2B6 ENZYME AND THE RESPONSE TO MEPERIDINE IN ORAL SEDATIONWhitfield, Heath 21 April 2010 (has links)
Purpose: The purpose of this study was to determine the relationship of the CYP2B6 genotype to the clinical response to meperidine in pediatric dental patients. Methods: Forty-nine patients, ASA I/ II, 41–101 months old, received an oral sedative regimen containing meperidine for dental treatment. The North Carolina Behavior Rating Scale (NCBRS) and Overall Effectiveness of Sedation Scale (OESS) were used to assess their behavior and sedation outcome. Saliva DNA samples were genotyped by PCR-RFLP. Results: We found the following genotype distributions: homozygous wild-type 1*1 (n = 19, 39%), heterozygous 1*6 (n = 25, 51%), and homozygous variant 6*6 (n = 5, 10%). The genotypes showed a significant difference in the North Carolina Behavior Rating Scores and a trend towards significance of the Overall Effectiveness of Sedation Scale during meperidine oral sedations. Conclusion: This research concludes that variations of the CYP2B6 enzyme can be used in the prediction of successful behaviors for oral sedations that include meperidine in the drug regimen. Future research regarding the enzyme kinetics of meperidine is needed to determine the exact enzymatic function of CYP2B6 and its variants.
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