A Clinical Investigation of the Effects of Omission of Pumice Prophylaxis on Band and Bond Failure

1995 ◽  
Vol 22 (3) ◽  
pp. 245-248 ◽  
Author(s):  
G. R. P. Barry
Keyword(s):  
Failure Rate ◽  
Statistical Difference ◽  
Random Number ◽  
Clinical Investigation ◽  
Control Groups ◽  
Bond Failure ◽  
Allocation Method ◽  
Clinical Trail ◽  
Subsequent Failure ◽  
Etch Time

One hundred and twelve first molar bands and 614 directly bonded brackets on incisor, canine, and premolar teeth were included in a clinical trail to investigate the importance of omission of pumice prophylaxis at the time of banding and bonding, on their possible subsequent failure. Half of the sample were selected for the non-pumiced test groups using a random number allocation method, the remaining pumiced teeth acting as control groups. Two etch times were used for the direct bonding part of the study, 15 and 60 seconds, with non-pumiced test and pumiced control groups included within both etch-time groups. Results showed no statistical difference in the failure rate of attachments in either test or control groups during the course of treatment. The different etch times had no significant effects in the direct bonding part of the study.

scholarly journals Postoperative analgesia effects of sulfentanyl plus dexmedetomidine in patients received VATS

Pteridines ◽  
2020 ◽  
Vol 31 (1) ◽  
pp. 55-60
Author(s):  
Haoyu Jiang ◽  
Ying Zheng ◽  
Chang Liu ◽  
Ying Bao
Keyword(s):  
Statistical Difference ◽  
Control Group ◽  
Control Groups ◽  
Significant Statistical Difference ◽  
Post Surgery ◽  
Intravenous Analgesia ◽  
The Mean ◽  
Nsclc Patients ◽  
And Control ◽  
Time Point

AbstractBackground To evaluate sulfentanyl combined with dexmedetomidine hydrochloride on postoperative analgesia in patients who received video-assisted thoracic surgery (VATS) and its effects on serum norepinephrine (NE), dopamine (DA), 5-hydroxytryptamine (5-HT), and prostaglandin (PGE2).Material and Methods Ninety-nine non-small cell lung cancer (NSCLC) patients who received VATS were included in the study. All the patients received intravenous inhalation compound anesthesia. Of the 99 cases, 49 subjects (control group) received sulfentanyl for patient controlled intravenous analgesia (PICA) and other 50 cases (experiment group) received sulfentanyl combined with dexmedetomidine hydrochloride for PICA after operation of VATS. The analgesic effects of the two groups were evaluated according to Visual Analogue Scales (VAS) and the Bruggrmann Comfort Scale (BCS). The serum pain mediator of NE, DA, 5-HT, and PGE2 were examined and compared between the two groups in the first 24 h post-surgery.Results The VAS scores for the experiment group were significant lower than that of control group on the time points of 8, 16, and 24 h post-surgery (pall<0.05), and the BCS scores of the experiment group in the time points of 8, 16, and 24 h were significantly higher than that of controls (p<0.05). However, the VAS and BCS scores were not statistical differently in the time point of 1, 2, and 4 h post-surgery (pall>0.05). The mean sulfentanyl dosage was 63.01 ± 5.14 μg and 67.12 ± 6.91 μg for the experiment and control groups respectively with significant statistical difference (p<0.05). The mean analgesic pump pressing times were 4.30 ± 1.31 and 5.31 ± 1.46 for experiment and control groups respectively with significant statistical difference (p<0.05). The serum NE, DA, 5-HT, and PGE2 levels were significantly lower in the experimental group compared to that of control group in the time point of 12 h post-surgery (pall<0.05). The side effects of nausea, vomiting, delirium, rash, and hypotension atrial fibrillation were not statistically different between the two groups (pall>0.05).Conclusion Patient controlled intravenous analgesia of sulfentanyl combined with dexmedetomidine hydrochloride was effective in reducing the VAS score and serum pain mediators in NSCLC patients who received VAST.

scholarly journals Clinical Evaluation of Bracket Bonding Using Two Different Polymerization Sources

2008 ◽  
Vol 78 (5) ◽  
pp. 922-925 ◽  
Author(s):  
Nikolaos S. Koupis ◽  
Theodore Eliades ◽  
Athanasios E. Athanasiou
Keyword(s):  
Failure Rate ◽  
Orthodontic Treatment ◽  
Light Emitting Diode ◽  
Rank Test ◽  
Dental Arch ◽  
Halogen Lamp ◽  
Failure Rates ◽  
Bond Failure ◽  
Significant Difference ◽  
The Right

Abstract Objective: To comparatively assess clinical failure rate of brackets cured with two different photopolymerization sources after nine months of orthodontic treatment. Materials and Methods: The sample of this study comprised 30 patients who received comprehensive orthodontic treatment by means of fixed appliances. Using the same adhesive, 600 stainless steel brackets were directly bonded and light cured for 10 seconds with the light-emitting diode (LED) lamp or for 20 seconds with the conventional halogen lamp. A split-mouth design randomly alternated from patient to patient was applied. Failure rates were recorded for nine months and analyzed with Pearson χ2 test, and log-rank test at α = .05 level of significance. Results: The overall failure rate recorded with the halogen unit (3.33%) was not significantly different from the failure rate for the LED lamp (5.00%). Significantly more failures were found in boys compared with girls, in the mandibular dental arch compared with the maxillary arch, and in posterior segments compared with anterior segments. However, no significant difference was found between the right and left segments. Conclusion: Both light-curing units showed sufficiently low bond failure rates. LED curing units are an advantageous alternative to conventional halogen sources in orthodontics because they enable a reduced chair-time bonding procedure without significantly affecting bond failure rate.

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 A Clinical Investigation about Horizontal Heterophoria Among Newly Diagnosed Myopia Juveniles in Nanchong District of China

2019 ◽  
Author(s):  
Ying Li Yan ◽  
Long Li ◽  
Ying Wang ◽  
Peng Guan Zeng ◽  
Chun Yun Zou
Keyword(s):  
Prevention And Control ◽  
Statistical Difference ◽  
Clinical Investigation ◽  
Mean Deviation ◽  
Newly Diagnosed ◽  
School Students ◽  
High Prevalence ◽  
Prevention And Treatment ◽  
The Mean ◽  
And Control

Abstract Background: To establish the prevalence and distribution of heterophoria in low myopia juveniles and and provide evidence of myopia prevention and treatment. Methods: Near and distant heterophoria were administered to the patients who were diagnosed of low myopia at their first visit in clinic. Tthe Von Graefe method was performed to test near, distant horizontal heterophoria types and degrees. Statistical analysis was performed with SPSS17.0 software. Results: A total of 150 students were participated in this study. Distant and near phoria was detected in 92.67% and 96.00% of the students respectively. exophoria was more common than esophoria(diantant:79.33% vs 13.33%; near:86.67% vs 9.33%, P<0.05), and the mean deviation of diantant and near heterophoria was -1.97△ and -3.91△. There was a statistical difference between the near and distant heterophoria (P<0.05). Conclusions: Most myopia juveniles have different extents of exophoria. Due to the high prevalence of heterophoria in myopia, in the process of refraction, attention should be paid to the examination of binocular visual function parameters such as heterophoria, which is conducive to the issuance of suitable optical correction prescriptions and the reasonable measures for myopia prevention and control. Keywords: Heterophoria, myopia, juvenile school students

scholarly journals Evaluation of Bond Failure Rate of Orthodontic Brackets Bonded with Green Gloo-Two Way Color Changes Adhesive: A Clinical Study

1970 ◽  
Vol 29 (2) ◽  
Author(s):  
Zuber Ahamed Naqvi ◽  
Saleem Shaikh ◽  
Zameer Pasha
Keyword(s):  
Failure Rate ◽  
Sampling Technique ◽  
Orthodontic Brackets ◽  
Rank Test ◽  
Dental Arch ◽  
Failure Rates ◽  
Bond Failure ◽  
Color Changes ◽  
Kaplan Meier ◽  
Significant Difference

BACKGROUND: Bonding is an important step in fixed orthodontic mechanotherapy. Many new materials introduced an adhesive for bonding. This study was designed to evaluate the clinical bond failure rate of orthodontic brackets bonded with green glue: two way color changes adhesive and transbond XT adhesive paste.METHODS: Eighteen male patients with a mean age of 16 years were included in the study. Convenience sampling technique was used to select the sample for this study. The split-mouth design was used to bond 360 brackets by one operator and both adhesives were used in each patient. Bond failure rates were estimated with respect to bonding procedure, dental arch, tooth type (incisor, canine, and premolar). The results were evaluated using the chisquare test. Kaplan – Meier analysis and the log rank test were used to estimate the survival rate of the brackets. Bracket failure rates for each system were analyzed, and failure causes as reported by the patients and the quadrant of each tooth in which bracketsfailed were recorded.RESULTS: The bond failure rate was 5.00% and 4.44% for green gloo and transbond XT group. No significant difference was found in the bond failure rate between transbond XT and Green gloo group. No significant difference was found in the bond failure rate between the two groups, in relation to right and left side and the type of teeth.CONCLUSION: Green gloo adhesive can be effectively used to bond orthodontic brackets.

scholarly journals Biomonitoring Data for Assessing Aflatoxins and Ochratoxin A Exposure by Italian Feedstuffs Workers

Toxins ◽  
2019 ◽  
Vol 11 (6) ◽  
pp. 351 ◽  
Author(s):  
Barbara De Santis ◽  
Francesca Debegnach ◽  
Elisa Sonego ◽  
Gianmarco Mazzilli ◽  
Francesca Buiarelli ◽  
...  
Keyword(s):  
Ochratoxin A ◽  
Statistical Difference ◽  
High Resolution Mass Spectrometry ◽  
Control Group ◽  
Control Groups ◽  
Serum Samples ◽  
Limit Of Quantification ◽  
Liquid Liquid Extraction ◽  
And Control

Mycotoxins exposure by inhalation and/or dermal contact is possible in different branches of industry especially where heavily dusty settings are present and the handling of dusty commodities is performed. This study aims to explore the validity of the biomonitoring as a tool to investigate the intake of mycotoxins in a population of workers operating in an Italian feed plant. Serum samples were collected for the determination of aflatoxins B1 (AFB1), AFB1-Lysine adduct and ochratoxin A (OTA). A method based on liquid–liquid extraction coupled with high resolution mass spectrometry determination was developed and fully validated. For AFB1, a high number of non-detected samples (90%) was found and no statistical difference was observed comparing workers and control group. None of the analyzed samples showed the presence of AFB1-Lysine adduct. For OTA, the 100% of the analyzed samples was positive with a 33% of the samples showing a concentration higher than the limit of quantification (LOQ), but no statistical difference was highlighted between the average levels of exposed and control groups. In conclusion, the presence of AFB1 and OTA in serum cannot be attributable to occupational exposure.

scholarly journals Cryotherapy Reduced Postoperative Pain in Gynecologic Surgery: A Randomized Controlled Trial

2019 ◽  
Vol 2019 ◽  
pp. 1-6 ◽  
Author(s):  
Apisada Chumkam ◽  
Densak Pongrojpaw ◽  
Athita Chanthasenanont ◽  
Junya Pattaraarchachai ◽  
Kornkarn Bhamarapravatana ◽  
...  
Keyword(s):  
Postoperative Pain ◽  
Statistical Difference ◽  
Controlled Trial ◽  
Exploratory Laparotomy ◽  
Gynecologic Surgery ◽  
Control Group ◽  
Study Group ◽  
Control Groups ◽  
Vas Score ◽  
And Control

Objective. To examine the effectiveness of cryotherapy for reducing postoperative pain in patients who underwent exploratory laparotomy for gynecologic surgery. Materials and Methods. Patients who had indication for an exploratory laparotomy gynecologic procedure were selected by attending physicians to undergo abdominal surgery via low transverse skin incision. The participants were randomized into study and control groups with simple random sampling methods. Cold packs were applied at two hours after operation for 6 hours. The visual analog scale (VAS) score was recorded at two, 6, and 12 hours after operation. Result. One hundred cases were recruited and then divided into study and control groups equally. The mean age of both groups was 43 years. There was no difference in demographics data of both groups. Half of the participants in both groups underwent hysterectomies. At two hours after surgery, both groups had similar VAS scores. The study group had a lower VAS score at 6 and 12 hours after surgery than the control group with statistical difference. Morphine consumption within 24 hours after surgery in both the study and control groups was 2.8±3.4 and 3.0±4.4 mg, respectively, with no statistical difference. However the registration time of the first morphine requirement in the study group was statistically more prolonged than that of the control group. The lengths of hospital stay in both groups were similar. There was no complication reported in this study. Conclusion. Cryotherapy can reduce postoperative pain. In this presented study the patients who underwent gynecologic surgery had improved pain relief and prolonged time for the first dose of the analgesic drug.

scholarly journals The Experience of ACL Reconstruction with Synthetics Ligament: Where are we now?

2019 ◽  
Vol 7 (11_suppl6) ◽  
pp. 2325967119S0045
Author(s):  
Shiyi Chen ◽  
Tianwu Chen ◽  
Fang Wan
Keyword(s):  
Surgical Technique ◽  
Acl Reconstruction ◽  
Failure Rate ◽  
Clinical Investigation ◽  
Rehabilitation Program ◽  
Return To Sports ◽  
Artificial Ligaments ◽  
Artificial Graft ◽  
Long Time ◽  
Synthetic Ligament

The dispute on artificial ligaments used for anterior cruciate ligament (ACL) reconstruction has been a long time issue. Admittedly, due to designing defects, materials deficient without creeping, viscoelasticity and biocompatibility, and incorrect surgical technique, early application of synthetic ligament in ACL reconstruction did not yield good outcomes. For a long time, a poor outcome occupied our consensus. Whilst the poignant lessons didn’t drive people to thoroughly figure out underlying reasons but amplified the fear of synthetics ligament in the ACL reconstruction. Recent 15 years, a new generation synthetic ligament, Ligament Advanced Reinforcement System (LARS) developed for ACL/PCL reconstruction has been widely used in China. There are at least 147 papers on LARS published in Chinese and over 47 SCI papers published in English. Consistently, a positive outcome has been concluded in most reports with an early return to sports and lower complication or failure rate. Cumulative failure rate from short- and mid-term follow-ups was only 2.6% according to Batty et al., which has been commended as “surprisingly impressive” by James H. Lubowitz of journal Arthroscopy. In China, LARS ligaments have been approved by CFDA since 2004 and been used for ACL reconstruction over 30,000 cases. Recently a national multi-centers clinical investigation has been done in long-term failure analysis of the ACLR with LARS, which has involved 20 Chinese clinical centers and 1146 cases with mean follow-up time of 87 months（7 years）, organized by the Chinese Artificial Ligament Study Group (CALSG), with an acceptable outcome in failure rate of 4.5% and complication rate of 4.1%. The following factors were concluded as main failure reasons, 1）incorrect surgical technique in a non-isometric ACL reconstruction, 2）lack of the graft biocompatibility and rigid screw interface fixation, 3) non-suitable indicated patients’ selection and rehabilitation program. Compared with reported long-term failure rate in auto（10%）or in allografts（24%）, the outcome of Synthetic ligament was more superior and acceptable results. Moreover, the functional evaluation and return to sports of the patients were also high satisfying, despite some complication, such as screw loose, remnant stimulation but very rear synovitis. Non-isometric tunnel position was the main failure reason which caused by surgeons tech. An ISOMETRIC surgical technique should be stressed especially in ACL reconstruction using synthetic, focused on surgeon education, instead of simply blaming the artificial graft. Based on the systemic review and our study, a modification of synthetic graft has been developed successfully in experiment, graft fixation, synthetics materials modified with Polyethylene Terephthalate (PET) which has facilitated the biocompatibility. Our clinical investigation has also focused on a near-isometric ACL reconstruction, which would decrease the graft tunnel motion and facilitate artificial graft successful. Non-isometric input will predispose the grafts easy failure because of over tension on the graft while joint moving. Carefully selected patients, proper surgical technique, and standard rehabilitation program will ensure artificial ligament successfully. We will keep devoting to innovate artificial ligaments, including tissue engineering, bio-mimics design, advanced fixation, hybrid graft designing and more precise Isometric surgical technique. Never forgetting our beginning mind, the artificial ligaments will open a new epoch in the future of ACL reconstruction.

Effect of Aspirin Pre- and Postburn on Survival of Experimental Intermediate Burns in Rats

2011 ◽  
Vol 15 (2) ◽  
pp. 111-114
Author(s):  
Eran Hadad ◽  
Melvyn Westreich ◽  
Tal Friedman ◽  
Avshalom Shalom
Keyword(s):  
Health Care ◽  
Cell Death ◽  
Statistical Difference ◽  
Burn Injury ◽  
Control Group ◽  
Control Groups ◽  
Burn Wound ◽  
Major Health ◽  
Flap Survival ◽  
And Control

Background:Burns are a major health care problem. Early treatment increases survival of intermediate burn zones, thus decreasing morbidity, mortality, surgery, and hospitalization. Previously, aspirin was shown to improve burn perfusion and increase failing flap survival.Objective:Owing to similarities between failing flaps and intermediate burn zones, we conducted this study to evaluate the effect of aspirin on intermediate burn zone survival.Methods:An intermediate burn was created in 30 rats randomly divided into three experimental groups: pre- and postburn aspirin groups and a control group. Final burn survival was evaluated on day 7.Results:No statistical difference was observed between the test and control groups. Both aspirin regimens failed to improve intermediate burn survival.Conclusion:Presumably, administration of aspirin could not prevent the noxious tissue events of burn injury that cause cell death. Possibly, different dosages or modes of administering aspirin could have a beneficial effect on burn wound survival.

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