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 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 12-Month Self-Ligating Bracket Failure Rate with a Self-Etching Primer

2008 ◽  
Vol 78 (6) ◽  
pp. 1095-1100 ◽  
Author(s):  
Selma Elekdag-Turk ◽  
Fethiye Cakmak ◽  
Devrim Isci ◽  
Tamer Turk
Keyword(s):  
Survival Rate ◽  
Clinical Performance ◽  
Survival Rates ◽  
Rank Test ◽  
Dental Arch ◽  
Bond Failure ◽  
Lower Survival Rate ◽  
Log Rank Test ◽  
Kaplan Meier ◽  
Significant Difference

Abstract Objective: To compare the clinical performance of a self-etching primer (SEP) with a conventional two-step etch and primer method (CM). Materials and Methods: Study subjects were 39 patients with a mean age of 15 years 7 months. Six hundred and eighty-eight brackets were bonded by one operator with a split-mouth design, using Transbond Plus Self-Etching Primer or a conventional two-step etch and primer (Transbond XT). The survival rate of the brackets was estimated by the Kaplan-Meier analysis. Bracket survival distributions with respect to bonding procedure, dental arch, type of tooth (incisor, canine, and premolar) and patients' gender were compared using the log-rank test. Bond failure interface was determined using the Adhesive Remnant Index (ARI). Results: The bond failure rates of SEP and CM were 4.7% and 1.7%, respectively. A significant difference was found between the bonding procedures using the log-rank test (P < .05). Furthermore, canine and premolar teeth displayed a lower survival rate than incisor teeth (P < .05). Survival rates did not show significant differences between the upper and lower dental arches and patients' gender (P > .05). No significant difference was observed for ARI scores (P > .05). Conclusion: These findings indicate that the SEP (Transbond Plus) can be effectively used to bond orthodontic brackets.

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 BOND FAILURE RATE OF AMORPHOUS CALCIUM PHOSPHATE CONTAINING (AEGIS ORTHO) AND FLUORIDE RELEASING (TRANSBOND PLUS COLOUR CHANGE) ORTHODONTIC ADHESIVES-A RANDOMIZED CLINICAL TRIAL

2019 ◽  
Author(s):  
Shyamala Naidu ◽  
Anand Suresh
Keyword(s):  
Calcium Phosphate ◽  
Failure Rate ◽  
Amorphous Calcium Phosphate ◽  
Age Groups ◽  
Colour Change ◽  
White Spot ◽  
Rank Test ◽  
White Spot Lesions ◽  
Bond Failure ◽  
Kaplan Meier

Background: The aim of the study was to compare the survival rate of brackets bonded with amorphous calcium phosphate containing adhesive and fluoride releasing orthodontic adhesive over 6 months period. White spot lesions were also evaluated prior to bonding, 3 months and 6 months from the date of bonding. Methods: Thirty six orthodontic patients were randomly divided into two equal groups using split mouth design. 592 brackets were bonded up to the premolars with either Aegis Ortho or Transbond Colour Change(TPCCA). Bracket failure rate and survival distribution were evaluated and compared using Kaplan- meier analysis and Log rank test with respect to adhesives, dental arches, segments , tooth types, gender and age groups. White spot lesion was assessed using WSL index. Results: There was no significant difference between the failure rate of Aegis Ortho(3.0%) and TPCCA(1.4%). Kaplan Meier analysis, Log rank test showed that the difference in the overall failure rate and survival time between the arches, gender, and different age groups were not statistically significant. Both adhesives had a high bond failure rate in the posterior segment especially in the premolar region. Three patients had white spot lesions in the upper premolar region bonded with Aegis ortho. Conclusion: Both Aegis ortho and Transbond plus colour change adhesive with a low bond failure rate can be used as an alternative orthodontic adhesive. Key words : bond failure, amorphous calcium phosphate, transbond colour change adhesive, white spot lesions.

scholarly journals Clinical bond failure rates of adhesive precoated self-ligating brackets using a self-etching primer

2013 ◽  
Vol 84 (1) ◽  
pp. 155-160 ◽  
Author(s):  
Mete Ozer ◽  
Mehmet Bayram ◽  
Cagri Dincyurek ◽  
Fuat Tokalak
Keyword(s):  
Survival Rates ◽  
Surface Preparation ◽  
Failure Rates ◽  
Bond Failure ◽  
Kaplan Meier ◽  
Adhesive Remnant Index ◽  
Combined Use ◽  
Significant Difference ◽  
First Time

ABSTRACT Objective: To comparatively assess the failure rate of adhesive precoated (APC) self-ligating metal brackets bonded with two different enamel surface preparation techniques: self-etching primer (SEP) and conventional two-step etch and primer method (CM). Materials and Methods: Fifty-seven patients with complete permanent dentition were included in this study. A total of 1140 APC self-ligating brackets (3M Unitek, Monrovia, Calif) were bonded using a split-mouth design. For each patient, SEP (Transbond Plus SEP, 3M Unitek) and CM (37% phosphoric acid) were used in alternate quadrants. All brackets were bonded by the same investigator after pumicing and rinsing of all of the teeth. The number, site, and date of first-time bracket failures were monitored throughout orthodontic treatment (mean, 22 months). The survival rates of the brackets were estimated by Kaplan-Meier and log-rank tests (P < .05). The adhesive remnant index was used to determine the bond failure interface. Results: The bond failure rates were 2.97% and 2.18% for the CM and SEP, respectively. No statistically significant difference in failure rates was found between the groups. The bond failure sites were predominantly at the enamel-adhesive interface in both groups. Conclusion: This long-term in vivo study showed that the combined use of SEP and the APC bracket system can be used effectively for bonding brackets after pumicing the enamel surfaces in clinical orthodontics.

scholarly journals Six-month bracket failure rate with a flowable composite: A split-mouth randomized controlled trial

2017 ◽  
Vol 22 (2) ◽  
pp. 69-76 ◽  
Author(s):  
Sindhuja Krishnan ◽  
Saravana Pandian ◽  
R. Rajagopal
Keyword(s):  
Randomized Controlled Trial ◽  
Failure Rate ◽  
Controlled Trial ◽  
Survival Rates ◽  
Failure Rates ◽  
Bond Failure ◽  
Flowable Composite ◽  
Randomized Controlled ◽  
Significant Difference ◽  
Orthodontic Bonding

ABSTRACT INTRODUCTION: The use of flowable composites as an orthodontic bonding adhesive merits great attention because of their adequate bond strength, ease of clinical handling and reduced number of steps in bonding. OBJECTIVE: The aim of this Randomized Controlled Trial was to comparatively evaluate over a 6-month period the bond failure rate of a flowable composite (Heliosit Orthodontic, Ivoclar Vivadent AG, Schaan) and a conventional orthodontic bonding adhesive (Transbond XT, 3M Unitek). METHODS: 53 consecutive patients (23 males and 30 females) who fulfilled the inclusion and exclusion criteria were included in the study. A total of 891 brackets were analyzed, where 444 brackets were bonded using Heliosit Orthodontic and 447 brackets were bonded using Transbond XT. The survival rates of brackets were estimated with the Kaplan-Meier analysis. Bracket survival distributions for bonding adhesives, tooth location and dental arch were compared with the log-rank test. RESULTS: The failure rates of the Transbond XT and the Heliosit Orthodontic groups were 8.1% and 6% respectively. No significant differences in the survival rates were observed between them (p= 0.242). There was no statistically significant difference in the bond failure rates when the clinical performance of the maxillary versus the mandibular arches and the anterior versus the posterior segments were compared. CONCLUSIONS: Both systems had clinically acceptable bond failure rates and are adequate for orthodontic bonding needs.

scholarly journals Cohort study of the overall survival of patients with pancreatic cancer in a hospital of specialties of Quito-Ecuador in the period 2007–2017

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Andrés Moreno Roca ◽  
Luciana Armijos Acurio ◽  
Ruth Jimbo Sotomayor ◽  
Carlos Céspedes Rivadeneira ◽  
Carlos Rosero Reyes ◽  
...  
Keyword(s):  
Pancreatic Cancer ◽  
Cohort Study ◽  
Survival Time ◽  
Univariate Analysis ◽  
Rank Test ◽  
Kaplan Meier ◽  
Significant Difference ◽  
Icd 10 ◽  
The Difference ◽  
Clinical Records

Abstract Objectives Pancreatic cancers in most patients in Ecuador are diagnosed at an advanced stage of the disease, which is associated with lower survival. To determine the characteristics and global survival of pancreatic cancer patients in a social security hospital in Ecuador between 2007 and 2017. Methods A retrospective cohort study and a survival analysis were performed using all the available data in the electronic clinical records of patients with a diagnosis of pancreatic cancer in a Hospital of Specialties of Quito-Ecuador between 2007 and 2017. The included patients were those coded according to the ICD 10 between C25.0 and C25.9. Our univariate analysis calculated frequencies, measures of central tendency and dispersion. Through the Kaplan-Meier method we estimated the median time of survival and analyzed the difference in survival time among the different categories of our included variables. These differences were shown through the log rank test. Results A total of 357 patients diagnosed with pancreatic cancer between 2007 and 2017 were included in the study. More than two-thirds (69.9%) of the patients were diagnosed in late stages of the disease. The median survival time for all patients was of 4 months (P25: 2, P75: 8). Conclusions The statistically significant difference of survival time between types of treatment is the most relevant finding in this study, when comparing to all other types of treatments.

The Efficacy of Etoposide-Based Therapy in Adult Secondary Hemophagocytic Lymphohistiocytosis

2021 ◽  
pp. 1-9
Author(s):  
Leonard Naymagon ◽  
Douglas Tremblay ◽  
John Mascarenhas
Keyword(s):  
Hemophagocytic Lymphohistiocytosis ◽  
Proportional Hazards ◽  
Multivariable Analysis ◽  
Cox Proportional Hazards ◽  
Rank Test ◽  
Kaplan Meier ◽  
Hazard Ratios ◽  
Significant Difference ◽  
The Impact

Data supporting the use of etoposide-based therapy in hemophagocytic lymphohistiocytosis (HLH) arise largely from pediatric studies. There is a lack of comparable data among adult patients with secondary HLH. We conducted a retrospective study to assess the impact of etoposide-based therapy on outcomes in adult secondary HLH. The primary outcome was overall survival. The log-rank test was used to compare Kaplan-Meier distributions of time-to-event outcomes. Multivariable Cox proportional hazards modeling was used to estimate adjusted hazard ratios (HRs) with 95% confidence intervals (CIs). Ninety adults with secondary HLH seen between January 1, 2009, and January 6, 2020, were included. Forty-two patients (47%) received etoposide-based therapy, while 48 (53%) received treatment only for their inciting proinflammatory condition. Thirty-three patients in the etoposide group (72%) and 32 in the no-etoposide group (67%) died during follow-up. Median survival in the etoposide and no-etoposide groups was 1.04 and 1.39 months, respectively. There was no significant difference in survival between the etoposide and no-etoposide groups (log-rank <i>p</i> = 0.4146). On multivariable analysis, there was no association between treatment with etoposide and survival (HR for death with etoposide = 1.067, 95% CI: 0.633–1.799, <i>p</i> = 0.8084). Use of etoposide-based therapy was not associated with improvement in outcomes in this large cohort of adult secondary HLH patients.

Outcomes of Inside-out Meniscal Repair in the Setting of Multiligament Reconstruction in the Knee

2017 ◽  
Vol 45 (9) ◽  
pp. 2098-2104 ◽  
Author(s):  
Jorge Chahla ◽  
Chase S. Dean ◽  
Lauren M. Matheny ◽  
Justin J. Mitchell ◽  
Mark E. Cinque ◽  
...  
Keyword(s):  
Failure Rate ◽  
Meniscal Repair ◽  
Postoperative Outcome ◽  
Control Group ◽  
Failure Rates ◽  
Significant Difference ◽  
Outcome Scores ◽  
Inside Out ◽  
Repair Group

Background: Limited evidence exists for meniscal repair outcomes in a multiligament reconstruction setting. Purpose/Hypothesis: The purpose of this study was to assess outcomes and failure rates of meniscal repair in patients who underwent multiligament reconstruction compared with patients who underwent multiligament reconstruction but lacked meniscal tears. The authors hypothesized that the outcomes of meniscal repair associated with concomitant multiligament reconstruction would significantly improve from preoperatively to postoperatively at a minimum of 2 years after the index surgery. Secondarily, they hypothesized that this cohort would demonstrate similar outcomes and failure rates compared with the cohort that did not have meniscal lesions at the time of multiligament reconstruction. Study Design: Cohort study; Level of evidence, 3. Methods: Inclusion criteria for the study included radiographically confirmed skeletally mature patients of at least 16 years of age who underwent multiligamentous reconstruction of the knee without previous ipsilateral osteotomy, intra-articular infections, or intra-articular fractures. Patients were included in the experimental group if they underwent inside-out meniscal suture repair with concurrent multiligament reconstruction. Those included in the control group (multiligament reconstruction without a meniscal tear) underwent multiligament reconstruction but did not undergo any type of meniscal surgery. Lysholm, Western Ontario and McMaster Universities Osteoarthritis Index, Short Form–12 physical component summary and mental component summary, Tegner activity scale, and patient satisfaction scores were recorded preoperatively and postoperatively. The failure of meniscal repair was defined as a retear of the meniscus that was confirmed arthroscopically. Results: There were 43 patients (16 female, 27 male) in the meniscal repair group and 62 patients (25 female, 37 male) in the control group. Follow-up was obtained in 93% of patients with a mean of 3.0 years (range, 2.0-4.7 years). There was a significant improvement between all preoperative and postoperative outcome scores ( P < .05) for both groups. The meniscal repair group had significantly lower preoperative Lysholm and Tegner scores ( P = .009 and P = .02, respectively). There were no significant differences between any other outcome scores preoperatively. The failure rate of the meniscal repair group was 2.7%, consisting of 1 symptomatic meniscal retear. There was no significant difference in any postoperative outcome score at a minimum 2-year follow-up between the 2 groups. Conclusion: Good to excellent patient-reported outcomes were reported for both groups with no significant differences in outcomes between the cohorts. Additionally, the failure rate for inside-out meniscal repair with concomitant multiligament reconstruction was low, regardless of meniscus laterality and tear characteristics. The use of multiple vertical mattress sutures and the biological augmentation resulting from intra-articular cruciate ligament reconstruction tunnel reaming may be partially responsible for the stability of the meniscal repair construct and thereby contribute to the overall improved outcomes and the low failure rate of meniscal repair, despite lower preoperative Lysholm and Tegner scores in the meniscal repair group.

Abstract P189: Method of Cold Saline Storage for Prehospital Induced Hypothermia

Circulation ◽  
2008 ◽  
Vol 118 (suppl_18) ◽  
Author(s):  
Mitch Kampmeyer ◽  
Clifton W Callaway
Keyword(s):  
Room Temperature ◽  
Prehospital Care ◽  
Rank Test ◽  
Induced Hypothermia ◽  
Ambient Conditions ◽  
Storage Unit ◽  
Cold Saline ◽  
Kaplan Meier ◽  
Significant Difference ◽  
Ambient Room Temperature

Recent research supports the use of cold IV fluid as a method for initiating therapeutic hypothermia in post-cardiac arrest resuscitation. However, prehospital care programs employing this treatment have encountered various difficulties. Barriers to prehospital induced hypothermia protocols include the lack of effective or economically reasonable methods to maintain cold saline in the field. Objective. Determine the time that a standard commercial cooler can maintain two 1-liter normal saline solution (NSS) bags below 4°C in 3 different environments. Methods. Environments simulating an ambulance compartment were created for the experiment. NSS temperatures were continuously recorded inside a standard commercial cooler with or without ice packs (IPs) under one of three scenarios: ambient room temperature (25°C) without (IPs), ambient room temperature with IPs and 50°C ambient temperature with IPs. Four trials under each condition were performed. Time to warm to 4°C was compared using Kaplan-Meier log rank test. Results. In a room temperature environment with IPs, the NSS warmed to 4°C in a mean interval of 29 hrs 53 mins versus in ambient room temperature without IPs (1 hr 21 mins) versus in constant hot environment of 50°C with IPs (10 hrs 50 mins). A significant difference was found between the three environments (log-rank =17.90, dF =2, p =0.0001). Conclusions. Low technology methods in the form of a cooler and IPs can provide cold NSS storage for longer than a full 24 hour shift in a room temperature ambulance. In hot ambient conditions, 4°C NSS can be maintained for nearly 11 hours using this method. This model exhibits an economical, easily deployable cold saline storage unit.

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