scholarly journals The outcome of direct composite restorations using the dental operating microscope

2021 ◽  
Author(s):  
Marius Bud ◽  
Mircea Zlăvog ◽  
Ștefan Jitaru ◽  
Bora Korkut ◽  
Sergiu Spataru ◽  
...  
Keyword(s):  
Marginal Adaptation ◽  
Operating Microscope ◽  
Whitney Test ◽  
Composite Restorations ◽  
Group I ◽  
Class 1 ◽  
Before And After ◽  
Subsequent Failure ◽  
Dental Professionals

Background. The objective of the present study was to compare the outcome of direct composite restorations, with and without the use of additional magnification. Methods. Twenty extracted molars were selected for the study. Class 1 Black cavities were prepared. All teeth were etched, and bonding agent was applied. Teeth were assigned randomly into two groups of ten each. Group I: restorations were done without the use of magnification, first by placing a layer of SDR® flow +Bulk Fill Flowable on the base of the cavity, and then restoring the morphology with Ceram.X SphereTEC® One. Group II: the same protocol was applied, but using the dental microscope. Teeth were then evaluated before and after the finishing protocol by 5 dental professionals using a series of established criteria. The results were documented and statistically analyzed using the non-parametric Mann-Whitney test. Results. Statistically significant differences were found when using magnification, before the polishing protocol in “marginal adaptation integrity” and “excess material”, and after polishing in “marginal adaptation integrity”. Conclusions. Magnification may be used to increase the quality of the final direct posterior restoration by improving the marginal adaptation integrity, reducing excess material, preventing marginal microleakage, and avoiding subsequent failure.

Marginal Adaptation of Direct Class II Composite Restorations with Different Cavity Liners

2013 ◽  
Vol 38 (6) ◽  
pp. E210-E220 ◽  
Author(s):  
R Pecie ◽  
I Onisor ◽  
I Krejci ◽  
T Bortolotto
Keyword(s):  
Elastic Modulus ◽  
Class Ii ◽  
Control Group ◽  
Shrinkage Stress ◽  
Marginal Adaptation ◽  
Composite Restorations ◽  
Significant Difference ◽  
Before And After ◽  
Group A ◽  
Group D

SUMMARY The aim of this study was to evaluate how cavity linings with different elastic modulus can influence the marginal adaptation (MA) of Class II composite restorations before and after thermo-mechanical loading. Materials and Methods: Forty Class II cavities with margins extending 1 mm below the cement-enamel junction were prepared in extracted human third molars. In each group except the control group, a lining material of 1-mm thickness was applied to the bottom of the cavity and polymerized before placing the resin composite Herculite XRV Ultra (group A: control; group B: Premise Flowable lining; group C: Herculite XRV Ultra lining; and group D: Optibond FL lining). MA was evaluated (with a scanning electron microscope) before and after loading (200,000 loading cycles). Statistical analysis was done using the Shapiro-Wilks test, the analysis of variance test, and Duncan post hoc test at p<0.05. Results: Before loading, the percentages of continuous margins in dentin were superior (p<0.05) for groups C and D (71.1% and 87.2%, respectively) compared to groups A and B (55.7% and 48.3%, respectively). After loading, group D (79.8%) was statistically superior in dentin compared to all of the other groups (43.6%, 35.9%, and 54.4%, respectively). In occlusal enamel, no significant difference was found between groups. The percentage of enamel fractures and the percentage of noncontinuous margins in proximal enamel were high, with no significant difference between liners. It can be concluded that for the materials used in this study, a 1-mm-thick lining with an extremely low elastic modulus (2-3 GPa) could redistribute shrinkage stress. The use of a flowable composite did not significantly improve MA.

scholarly journals Effects of Total and Selective Bonding on Marginal Adaptation and Microleakage of Class I Resin Composite Restorations In Vitro

2008 ◽  
Vol 33 (6) ◽  
pp. 629-635 ◽  
Author(s):  
P. R. Schmidlin ◽  
T. Huber ◽  
T. N. Göhring ◽  
T. Attin ◽  
A. Bindl
Keyword(s):  
Clinical Relevance ◽  
Resin Composite ◽  
Class I ◽  
Marginal Adaptation ◽  
Glass Ionomer ◽  
Composite Restorations

Clinical Relevance Within the limitations of the current study, the use of glass ionomer liners improves the margin quality of Class I resin composite restorations and reduces leakage.

Selective Enamel Etching: Effect on Marginal Adaptation of Self-Etch LED-Cured Bond Systems in Aged Class I Composite Restorations

2012 ◽  
Vol 37 (2) ◽  
pp. 195-204 ◽  
Author(s):  
EJ Souza-Junior ◽  
LT Prieto ◽  
CTP Araújo ◽  
LAMS Paulillo
Keyword(s):  
Light Emitting Diode ◽  
The Other ◽  
Class I ◽  
Marginal Adaptation ◽  
Scanning Electron Microscopy Data ◽  
Gap Formation ◽  
Composite Restorations ◽  
Marginal Integrity ◽  
Before And After ◽  
Self Etch

SUMMARY The aim of this study was to evaluate the influence of previous enamel etch and light emitting diode (LED) curing on gap formation of self-etch adhesive systems in Class I composite restorations after thermomechanical aging (TMA). Thus, on 192 human molars, a box-shaped Class I cavity was prepared maintaining enamel margins. Self-etch adhesives (Clearfil SE and Clearfil S3) were used to restore the preparation with a microhybrid composite. Before application of the adhesives, half of the teeth were enamel etched for 15 seconds with 37% phosphoric acid; the other half were not etched. For the photoactivation of the adhesives and composite, three light-curing units (LCUs) were used: one polywave (Ultra-Lume LED 5, UL) and two single-peak (FlashLite 1401, FL and Radii-cal, RD) LEDs. After this, epoxy resin replicas of the occlusal surface were made, and the specimens were submitted to TMA. New replicas were made from the aged specimens for marginal adaptation analysis by scanning electron microscopy. Data were submitted to Kruskal-Wallis and Wilcoxon tests (α=0.05). Before TMA, when enamel was etched before the application of S3, no gap formation was observed; however, there were gaps at the interface for the other tested conditions, with a statistical difference (p≤0.05). After TMA, the selective enamel etching previous to the S3 application, regardless of the LCU, promoted higher marginal adaptation compared to the other tested groups (p≤0.05). Prior to TMA, higher marginal integrity was observed, in comparison with specimens after TMA (p≤0.05). With regard to Clearfil SE and Clearfil Tri-S cured with FL, no differences of gap formation were found between before and after aging (5.3 ± 3.8 and 7.4 ± 7.5, respectively), especially when the Clearfil Tri-S was used in the conventional protocol. When cured with RD or UL and not etched, Clearfil Tri-S presented the higher gap formation. In conclusion, additional enamel etching promoted better marginal integrity for Clearfil Tri-S, showing it to be an efficient technique for Class I composite restorations. The two-step self-etch adhesive was not influenced by selective enamel etching or by the LED-curing unit.

scholarly journals The Effect of Hybrid Barley in the Diets of Fattening Pigs on Pork Oxidative Stability Related to the Fatty Acid Profile

Animals ◽  
2021 ◽  
Vol 11 (7) ◽  
pp. 2134
Author(s):  
Anna Szuba-Trznadel ◽  
Małgorzata Korzeniowska ◽  
Tomasz Hikawczuk ◽  
Bogusław Fuchs
Keyword(s):  
Fatty Acid ◽  
Oxidative Stability ◽  
Meat Quality ◽  
Thermal Processing ◽  
Pork Meat ◽  
Group I ◽  
Before And After ◽  
Meat Samples ◽  
Fattening Pigs

Feed determines the quality of pork meat, in which the composition of the fatty acid (FA) profile is one of the easiest to modify by the application of selected feed components. Barley grains are considered to have an impact on meat quality, including pork; however, there are still limited data on the use of hybrid barley in fattening pigs’ nutrition in relation to meat quality. The aim of this study was to determine the relation between meat quality, i.e., its oxidative stability, especially the FA profile, and fattening pigs’ diets with hybrid barley and/or wheat. In group I, hybrid barley (HB) composed 80% of the feed; in group II, a mixture of (40% each) wheat and barley was used; and in group III, wheat (W) composed 80% of the feed. Meat samples were taken from twelve randomly selected carcasses chosen from each group. The meat analyses covered the physicochemical and sensory traits. The results showed that the pork meat of fattening pigs fed fodder with 80% HB had decreased palmitic acid concentrations and increased oleic acid concentrations. The meat of these pigs was characterised by the best marbling, which was closely related to its juiciness after thermal processing and determined its final culinary quality. Moreover, the meat from these pigs exhibited a reddish colour, before and after thermal processing. In summary, the application of hybrid barley into pig nutrition improved the quality of the culinary meat.

scholarly journals Comparative characteristics of quality of life in patients, suffering locally-spread mammary gland cancer after conduction of regional and intravenous chemotherapy

2018 ◽  
Vol 85 (6) ◽  
pp. 55-59
Author(s):  
Yu. V. Dumanskiy ◽  
O. V. Bondar ◽  
O. I. Tkachenko ◽  
Ye. A. Stoliarchuk
Keyword(s):  
Quality Of Life ◽  
Mammary Gland ◽  
Prognostic Significance ◽  
Life Index ◽  
National Medical ◽  
Group I ◽  
Before And After ◽  
Quality Of Life Index ◽  
Mammary Gland Cancer

Objective. Investigation of quality of life (QL) in patients, suffering inoperable forms (locally-spread) of mammary gland cancer (MGC), before and after conduction of neoadjuvant courses of systemic polychemotherapy (SPCHTH) and selective intraarterial polychemotherapy (SIAPCHTH) in combination with SPCHTH. Маterials and methods. Complex treatment was conducted in 154 patients, suffering locally-spread MGC T4A-DN0-3M0 in a period 2000 -2017 yrs, on base of Donetsk Regional Antitumoral Centre and The University Clinic of Odessa National Medical University. All the patients were divided into two groups. Tо Group I (control) were included 65 patients, suffering inoperable forms of a locally-spread MGC, to whom as a neoadjuvant course a SPCHTH was conducted; and to the Group II (investigating) - 89 patients, suffering inoperable forms of locally-spread MGC, to whom a SIAPCHTH was conducted as a neoadjuvant course. Results. Through the period of treatment a wave-like dynamics of the quality of life index was observed, which indicated a definite advantage of SIAPCHTH over SPCHTH. A limited statistically trustworthy difference in favor of regional polychemotherapy was formed between the Groups of patients in accordance to the quality of life index. Conclusion. Investigation of quality of life constitutes a secure, informative and economic method of estimation of a patient state of health on the groupings and the individuals levels. In oncological investigations the QL assessment constitutes an important criterion of the treatment efficacy estimation and has a prognostic significance. Estimation of quality of life in clinical investigations improves the investigation quality itself.

scholarly journals Perbandingan Efektifitas Tramadol 1 mg/kgbb + Paracetamol 1 gr Intravena dan Tramadol 1 mg/kgbb + Ketorolak 30 mg Intravena pada Penanganan Nyeri Pasca Pembedahan Sesaria

e-CliniC ◽  
2014 ◽  
Vol 2 (1) ◽  
Author(s):  
Julita Lidya Watung
Keyword(s):  
Pain Management ◽  
Primary Data ◽  
P Value ◽  
Whitney Test ◽  
Group I ◽  
Lower Pain ◽  
Negative Effect ◽  
Test Result ◽  
Data Result

Absract: Background: A process of pain management can not be separated with anesthesia practice. Pain after section caesaria is the main problem. Because if the pain cannot be managed, it will appearing negative effect and finally will influence the quality of baby treatment by his/her mother. Goal :To know the comparative effectivity of Tramadol 1mg/kg of weight + Paracetamol 1 gr Intravenous and Tramadol 1 mg/ kg of weight + Ketorolac 30 mg Intravenous on pain management after sectio caesaria. Methods : The research using prospective analytic study, with collecting primary data result from pain measurement and elaborating with SPSS Statistic 20 programme. The result being stated in rerate within result test of Mann-Whitney test. Result : Total of research subject is 20 people that devided in two groups, group I : Tramadol 1mg + Ketorolac 30 mg and group II : Tramadol 1mg + Paracetamol 1 mg iv. In a groups of Trmadol + Ketorolac the patient almost 40 years old and in a groups of Tramadol + Paracetamol the patient almost 30 years old. Severe pain in control, only in Tramadol + Ketorolac groups but did not has large different. In moderate pain,Tramadol + Ketorolac groups more than Tramadol + Paracetamol groups. And in lower pain, Tramadol + Paracetamol groups more than Tramadol + Ketorolac groups. Based on Man-Whitney test, conclude that this research totality has P value = 0.088 it is mean this research is different but not meaningful. Conclusions: Paracetamol has more good effectivity than Ketorolac for pain management after sectio caesaria.Key Word: Pain, Paracetamol, Ketorolac, Tramadol, Sectio Caesaria   Abstrak: Latar Belakang : Proses penanganan nyeri tidak dapat dipisahkan prosesnya dengan praktek anestesi. Nyeri pasca bedah sesar merupakan masalah utama. Karena apabila nyeri tidak diatasi akan menimbulkan dampak negative dan akhirnya akan mempengaruhi kualitas perawatan bayi oleh ibunya.Tujuan : mengetahui perbandingan efektifitas antara tramadol 1 mg/kgbb + paracetamol 1 gr Intravena dan tramadol 1 mg/kgbb + ketorolak 30 mg intravena pada penanganan nyeri pasca bedah sesar. Metode : Penelitian ini bersifat analitik prospektif, dengan mengumpulkan data primer hasil pengukuran nyeri dan diolah dengan program SPSS Statistic 20. Hasilnya dinyatakan dalam rerate (mean) disertai uji hasil menggunakan uji Mean-Whitney. Hasil : Jumlah subjek penelitian adalah 20 orang yang dibagi menjadi dua kelompok yaitu, kelompok I : mendapat tramadol 1 mg + ketorolak 30 mg iv, kelompok II : mendapat tramadol 1 mg + parasetamol 1 gr iv. Pada kelompok tramadol + ketorolak pasien paling banyak berumur 40-an sedangkan pada kelompok tramadol + parasetamol, pasien yang paling banyak ada pada umur 30-an. Nyeri berat terkontrol hanya ada pada kelompok tramadol + ketorolak tapi tidak memiliki perbedaan yang besar. Pada nyeri sedang kelompok tramadol + ketorolak lebih tinggi daripada kelompok tramadol + parasetamol.Sedangkan pada nyeri ringan kelompok tramadol + parasetamol lebih tinggi dibandingkan tramadol + ketorolak. Berdasarakan uji statistic Mann – Whitney dapat disimpulkan bahwa secara keseluruhan penelitian ini memiliki nilai p = 0,088 yang berarti penelitian ini adalah berbeda tapi tidak bermakna. Kesimpulan : Parasetamol memiliki tingkat efektifitas yang lebih baik dibandingkan dengan ketorolak untuk mengatasi nyeri pasca bedah sesar. Kata kunci : Nyeri, Parasetamol, Ketorolak,Tramadol, Pembedahan Sesar.

scholarly journals Cage Subsidence after Surgery on the Anterior Part of the Subaxial Cervical Spine: a Monocentric Prospective Clinical Study with a 3-Year Follow-Up

2020 ◽  
Vol 26 (2) ◽  
pp. 139-147
Author(s):  
S. V. Kolesov ◽  
A. I. Kazmin ◽  
I. V. Skorina ◽  
V. V. Shvets ◽  
M. L. Sazhnev ◽  
...  
Keyword(s):  
Cervical Spine ◽  
Bone Block ◽  
Group I ◽  
Cage Subsidence ◽  
Traumatic Lesions ◽  
Before And After ◽  
Group Ii ◽  
Titanium Cages

The choice of an implant for vertebra body defect replacement in corpectomy for traumatic lesions remains a point of discussion among spinal surgeons. Nanostructured carbon cages are promising for use in spinal surgery.The purpose of this study was to determine the rate and degree of cage subsidence in the patients with traumatic lesions of the cervical spine undergone a single-level anterior corpectomy in the subaxial part of the cervical spine with reconstruction using a carbon or titanium cage. Materials and Methods. A prospective study included 47 patients undergone a single-level corpectomy of the cervical spine due to traumatic injury. Two groups were formed by adaptive randomization: group I with the patients with carbon cages (n = 23), and group II with the patients with titanium cages (n = 24). The evaluation of cages subsidence and stability was carried by X-rays and CT before and after surgery. The quality of life before and after the surgery was evaluated using NDI and VAS questionnaires.Results. According to the questionnaires, the absolute majority of the patients in both groups showed a statistically significant improvement of quality of life in the postoperative period (p<0.01). The first signs of implant subsidence were noted 3 months after surgery in group II. There were none of such cases in group I. The final result of the subsidence at the end of the follow-up comprised: for group I 0.6±0.4 mm, for group II 3.1±1.4 mm (p = 0.023). In group II, the bone block between bone tissue and the cage was recorded in 30% of patients (p = 0.037), in group I, the bone block was not formed. At the same time, according to the functional X-ray data, there were no signs of carbon cages instability in group I. None of the patients in groups I and II required revision surgery due to complications associated with cages placement.Conclusion. The outcomes of carbon nanostructure cages placement as bodyreplacing implants in the cervical spine were not inferior to the outcomes of titanium mesh cages using. In group I, the carbon cages subsidence was significantly lower than in group II with titanium cages. The bone block was not formed in the case of carbon cages. It is worth noting that the carbon structure of the cages allowed the radiological diagnostics of the operated segment without artifacts formation.

scholarly journals Does bonding to Dentin reduce Gap formation in Composite Restorations?

2012 ◽  
Vol 1 (2) ◽  
pp. 67-70
Author(s):  
Daniela Araújo Veloso Popoff ◽  
Murilo de Sousa Menezes ◽  
Andressa dos Santos Gomes ◽  
André Luis Faria-e-Silva ◽  
Paulo Vinícius Soares ◽  
...  
Keyword(s):  
Composite Resin ◽  
Marginal Adaptation ◽  
Gap Formation ◽  
Adhesive Systems ◽  
Experimental Conditions ◽  
Composite Restorations ◽  
Mechanical Cycling ◽  
Before And After ◽  
Composite Resin Restorations ◽  
Adhesive Application

ABSTRACT This study evaluated the effect of adhesive application only to enamel on the gap formation of composite resin restorations performed with different adhesive systems and submitted to mechanical cycling. Standardized cylinder-shaped cavities were prepared on the buccal surface of 60 bovine incisors. Two etchand-rinse [Adper Scotchbond Multi-purpose (3M ESPE, St. Paul, MN, USA) and Adper Single Bond 2 (3M ESPE)] and one selfetching [Clearfil SE Bond (Kuraray, Osaka, Japan)] adhesive systems were evaluated. The adhesives were applied only to enamel or to both dentin and enamel. After adhesive light activation, the cavities were restored with composite resin. The restorations were finished and polished; the marginal adaptation was analyzed using scanning electronic microscopy (SEM, 500× magnification) in low-vacuum mode. After the first evaluation, the samples were submitted to mechanical cycling (300,000 cycles of 80 kN and 1.5 Hz) and a new evaluation was performed. There was observed any gap for all experimental conditions before and after mechanical cycling. Bonding to dentin does not alter the marginal adaptation of composite restorations. How to cite this article Popoff DAV, Menezes MS, Gomes AS, Faria-e-Silva AL, Soares PV, Santos-Filho PC, Martins LRM. Does bonding to Dentin reduce Gap formation in Composite Restorations? Int J Experiment Dent Sci 2012;1(2):67-70.

Influence of Beveling and Ultrasound Application on Marginal Adaptation of Box-only Class II (slot) Resin Composite Restorations

10.2341/06-84 ◽  
2007 ◽  
Vol 32 (3) ◽  
pp. 291-297 ◽  
Author(s):  
P. R. Schmidlin ◽  
K. Wolleb ◽  
T. Imfeld ◽  
M. Gygax ◽  
A. Lussi
Keyword(s):  
Clinical Relevance ◽  
Resin Composite ◽  
Class Ii ◽  
Marginal Adaptation ◽  
Composite Restorations ◽  
Ultrasound Application

Clinical Relevance Beveling box-only Class II cavities is necessary to improve the marginal quality of restorations. Where beveling is impossible or difficult to achieve, ultrasound may improve marginal quality.

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