scholarly journals Fracture Resistance of Primary Canines Restorations Reinforced with a Flowable or a Packable Composite Resin Posts; In- Vitro

2021 ◽  
Author(s):  
Ghasem Ansari ◽  
Fatemeh javadi ◽  
Kiana Hanjani ◽  
Ahmad Najafi Abrandabadi ◽  
Mahshid Gashtasb ◽  
...  
Keyword(s):  
Fracture Resistance ◽  
Composite Resin ◽  
Testing Machine ◽  
P Value ◽  
Anterior Teeth ◽  
Group I ◽  
Significant Difference ◽  
The Mean ◽  
Group Ii ◽  
Type Of Fracture

Abstract Aim and Background: Restoration of severely damaged primary anterior teeth are deemed as serious challenges for pediatric dentists. The aim of this study was to evaluate the fracture resistance of primary canines restored with flowable or packable composite resin posts. Material and Methods This study was conducted on a group of extracted primary canines. After cutting the coronal section, standard pulpectomy was performed and root canals were filled with ZOE paste leaving 3 mm coronal root space. A liner was placed above the root canal filling as a barrier. Samples were then randomly divided into two groups of fifteen. Both groups, received etch, bond, then in group I Core Flo Composite resin placement into canal, in group II, post shaping using designated packable composite resin and inserted into the canal. Followed by Core buildup and Crown reconstruction using Z250 composite resin. Samples were mounted at 148 ° angle on the acrylic blocks and stored in de-ionized water for 72 hours. Fracture resistance was measured using Universal Testing Machine. Data analysis were performed using independent t-test. Chi- square test were also employed to assess the type of fracture within groups. Results The mean fracture resistance in the group I was 830.31(+/-328.69N) and 803.09(+/-326.45N) in group II. Moreover, statistical analyses of the results showed no significant difference between the mean values of the fracture resistance (p-value=0.822) of groups as well as the type of fracture (p-value=0.79) between groups. Conclusion The ease of use and proper adhesion of the Core Flo composite resin, seems to help its use in the reconstruction of severely destructed anterior primary teeth.

scholarly journals Evaluation of Fracture Resistance of Orthodontic Mini-implants in the Transmucosal Profile Region

2015 ◽  
Vol 16 (5) ◽  
pp. 372-375 ◽  
Author(s):  
Adelson Mota de Aguiar ◽  
Arilton Mota de Aguiar ◽  
Célia Regina Maio Pinzan-Vercelino ◽  
Fausto Silva Bramante
Keyword(s):  
Fracture Resistance ◽  
Testing Machine ◽  
Significance Level ◽  
Group Iii ◽  
Mini Implants ◽  
Group I ◽  
Significant Difference ◽  
The Mean ◽  
Group Ii

ABSTRACT Aim This study sought to compare the fracture resistance of three trademarked orthodontic mini-implants in the transmucosal profile region. Thirty-six mini-implants of three different brands, separated into groups I, II and III, were tested. Each group consisted of 12 mini-implants of 6 mm in length. The mean diameter and length of the transmucosal profile of the mini-implants were 1.90 and 2.0 mm in group I, 1.77 and 1.0 mm in group II and 1.50 and 1.0 mm in group III, respectively. The tests were performed on a universal testing machine in compression mode, with a 2,000 kgf load, a speed of 4.0 mm per minute and a chisel-shaped active tip, which acted crosssectionally on the transmucosal profile. Single-criterion analysis of variance was used to compare the three brands. A significance level of 5% and test power of 80% were adopted. The mean fracture resistance achieved by the mini-implants was 172.03 ± 25.59 N for group I, 162.35 ± 30.81 N for group II and 139.69 ± 42.99 N for group III. There was no statistically significant difference in mean fracture resistance among the tested mini-implant brands. Conclusion The transmucosal profile diameter does not seem to be a deciding factor in the choice of mini-implants to minimize the risk of fractures. Clinical significance Although being an in vitro study it is possible to believe that this new brand has a very satisfactory resistance to fracture and enables its use with great efficiency. How to cite this article de Aguiar AM, Bramante FS, de Aguiar AM, Pinzan-Vercelino CRM. Evaluation of Fracture Resistance of Orthodontic Mini-implants in the Transmucosal Profile Region. J Contemp Dent Pract 2015;16(5):372-375.

scholarly journals Short and Long-Term Follow up Results of Daily 5 Mg Tadalafil as a Treatment for Erectile Dysfunction and Premature Ejaculation

2021 ◽  
Author(s):  
Tarek Gharib ◽  
Ibrahim Abdelal ◽  
Adel Elatreisy ◽  
Elsayed Salih ◽  
Ahmed Sebaey
Keyword(s):  
Erectile Dysfunction ◽  
Premature Ejaculation ◽  
P Value ◽  
Group I ◽  
Significant Difference ◽  
Long Term Follow Up ◽  
The Mean ◽  
Group Ii

Abstract Objective: To evaluate effectiveness and safety of a 5mg tadalafil daily treatment for men with erectile dysfunction (ED) and premature ejaculation (PE) and assessment of long-term follow up by persistence of improvement 2 years after stoppage of tadalafil.Materials and Methods: The study included 160 patients diagnosed with erectile dysfunction from April 2018 to June 2020. All were evaluated using the international index of erectile function questionnaire-5 (IIEF-5) to evaluate ED and intravaginal ejaculatory latency time (IELT) for PE. Patients subdivided into two equal groups. I included 80 patients treated with tadalafil 5 mg daily for 3 months, and group II included 80 patients treated with a placebo for same period. After 3 months treatment and 2 years later after stoppage of tadalafil, all patients were assessed for ED and PE using the same questionnaires. Results: The mean IELT and IIEF pretreatment were 37±11.24 s and 13.2±4.2 respectively for group I, while in group II was 35.98±10.8 s and 13.12±4.11, respectively. After 3 months of treatment, the mean value of IELT in group I showed a highly significant improvement from 37±11.24 sec to 120.5±47.37 sec (p-value < 0.001), but for group II, the mean values of IELT showed no significant improvement from baseline 35.98±10.8 to endpoint 39.43±13.6 ( p-value > 0.05). As regarding the IIEF, there was a highly significant improvement from baseline 13.2±4.2 to endpoint 20.45±4.5 in group I (p-value < 0.001) while there was no significant difference in group II from baseline 13.12±4.11 to endpoint 15±4.84 (p-value > 0.05) . 2 years later after stoppage of tadalafil , 75 patients from group I complete follow up and there was significant improvement in IELT and IIEF form base line (37±11.24) (13.2±4.2) to endpoint (98±18.3) (19.1±2.3) respectively but less than the results after 3 months treatment.ConclusionDaily Tadalafil 5 mg was effective, tolerable, and safe treatment for patients suffering from ED and PE. Long-term follow up after 2 years declared persistence of significant improvement.

scholarly journals Fracture Resistance of a Bulk-Fill and a Conventional Composite and a Combination of Both for Coronal Restoration of Severely Damaged Primary Anterior Teeth

2019 ◽  
Author(s):  
Shahram Mosharrafian ◽  
Maryam Shafizadeh ◽  
Zeinab Sharifi
Keyword(s):  
Fracture Resistance ◽  
Treatment Time ◽  
Testing Machine ◽  
Anterior Teeth ◽  
Significant Difference ◽  
Group 3 ◽  
The Mean ◽  
Group 2 ◽  
One Way Anova

Objectives: This study aimed to compare the fracture resistance of a bulk-fill and a conventional composite and a combination of both for coronal restoration of severely damaged primary anterior teeth. Materials and Methods: In this in vitro experimental study, 45 primary anterior teeth were randomly divided into three groups. After root canal preparation, the canals were filled with Metapex paste such that after the application of 1 mm of light-cure liner, 3 mm of the coronal third of the canal remained empty for composite post fabrication. Filtek Z250 conventional composite was used in group 1, Sonic-Fill bulk-fill composite was used in group 2 and Sonic-Fill with one layer of Filtek Z250 as the veneering were used in group 3. Adper Single Bond 2 was used in all groups. The teeth were thermocycled, and fracture resistance was measured by a universal testing machine. The mode of fracture was categorized as repairable or irreparable. Data were analyzed using one-way ANOVA. Results: The mean fracture resistance was 307.00±74.72, 323.31±84.28 and 333.30±63.96 N in groups 1 to 3, respectively (P=0.55). The mean fracture strength was 14.53±2.98, 15.08±2.82 and 15.26±3.02 MPa in groups 1 to 3, respectively (P=0.77). The frequency of repairable mode of failure was 80% for the conventional, 73.6% for the bulk-fill and 80% for the bulk-fill plus conventional group, with no significant difference (P>0.05). Conclusions: Bulk-fill composites can be used for coronal reconstruction of severely damaged primary anterior teeth similar to conventional composites to decrease the treatment time in pediatric patients.

Polyethylene ribbon fibers

2005 ◽  
Vol 29 (2) ◽  
pp. 151-156 ◽  
Author(s):  
Gema Island ◽  
G.E. White
Keyword(s):  
Fracture Resistance ◽  
Adhesive Systems ◽  
Anterior Teeth ◽  
Group I ◽  
Impregnated Resin ◽  
Different Types ◽  
Post And Core ◽  
The Mean ◽  
Group Ii ◽  
Core Part

Dentistry has advanced to the point where it is undesirable for children to be partially edentulous or to have unattractive anterior teeth. With the introduction of new materials and adhesive systems the use of polyethylene fibers as post and core offer a new reconstructive alternative for severely destroyed primary anterior teeth. These fibers offer root and coronal retention, stability and esthetics, and it is done chair side. The present study compared two different types of fibers and analyzed the fracture resistance between the two of them. Two groups were formed. Group I used non pre-impregnated resin fibers (glasSpan) and group II used pre-impregnated resin fibers (Splint-it). Both types of fibers have been used as post and core in the restoration of primary teeth and clinical studies have been published. Our results indicated that the mean fracture resistance for group I was 71.346 and for group II 97.952 (p=0.004). During the observation of the fractured samples, adhesive failures were noted for group I at the junction between the fiber and its core to the interior wall of the root canal. In group II, the fibers were dislodged out of the canal and the core part of the canal remained intact. It can be concluded that pre-impregnated fibers offer a better fracture resistance when used as post in endodontically treated primary anterior teeth. J Clin Pediatr Dent 29(2): 151-156, 2005

scholarly journals Evaluation of Salivary Procalcitonin and Macrophage Activating Factor in Generalised Chronic Periodontitis Patients with and without Type 2 Diabetes Mellitus

2021 ◽  
Author(s):  
Sindhu Ramarao Ghorpade ◽  
Vijayalakshmi Rajaram ◽  
Jaideep Mahendra ◽  
Burnice Nalinakumari Chelladurai ◽  
Ambalavanan Namasivayam
Keyword(s):  
Diabetes Mellitus ◽  
Type 2 Diabetes ◽  
Type 2 Diabetes Mellitus ◽  
Chronic Periodontitis ◽  
P Value ◽  
Group I ◽  
Significant Difference ◽  
The Mean ◽  
Group Ii

Introduction: Periodontitis is a polymicrobial and multifactorial oral disease and is the sixth complication of diabetes mellitus. Early diagnosis is important, and the use of non invasive biomarkers are highly useful for this purpose. The level of Macrophage Activating Factor (MAF) and Procalcitonin (ProCT) corresponds to the intensity of the inflammatory response and the severity of infection; thereby indicating that an increase in concentration or persistence of high values is considered as a prognostic indicator for severity of infection with an adverse outcome. Aim: To assess the periodontal parameters and quantify the levels of MAF and ProCT in saliva samples of generalised chronic periodontitis subjects with and without type 2 diabetes mellitus and to correlate these levels with the periodontal parameters. Materials and Methods: The study was a single centre cross- sectional study carried out at the Department of Periodontology, Meenakshi Ammal Dental College and Hospital, Chennai, Tamil Nadu, India, from November 2018 to November 2019. A total of 80 subjects with generalised severe chronic periodontitis were selected and divided into two groups. Group I comprised of 40 subjects who were diagnosed with generalised chronic periodontitis without type 2 diabetes mellitus, whereas group II comprised of 40 subjects with generalised chronic periodontitis who had already been diagnosed with type 2 diabetes mellitus. Periodontal parameters such as Plaque Index (PI), Bleeding on Probing (BOP), Probing Pocket Depth (PPD) and Clinical Attachment Level (CAL) were recorded. The collected samples were subjected to molecular analysis for evaluating ProCT and MAF using Enzyme-Linked Immunosorbent assay (ELISA). Statistical analysis was done using Statistical Package for Social Sciences (SPSS) version 25.1 (Chicago, USA Inc). Student’s Independent t-test was used to compare the mean values for the variables in the control and test group. The Pearson’s correlation test was used to evaluate correlation between all the variables. The p-value <0.05 was set as the level of significance. Results: On comparing the periodontal parameters between group I and group II, there was no significant difference between the groups p-value >0.05. The mean salivary ProCT level in group I and group II was 268.76±152.78 ng/mL and 785.75±244.37 ng/mL, respectively. The mean salivary MAF level in group I and group II was 7.15±2.02 ng/mL and 26.56±9.12 ng/mL, respectively. On comparing MAF and ProCT value between group I and group II, there was a statistically significant increase in group II (p-value <0.001) and a weak correlation value with the periodontal parameters was seen. Conclusion: There was a significant difference in levels of MAF and ProCT in saliva samples of generalised chronic periodontitis subjects with and without type 2 diabetes mellitus, however the periodontal variables in each group did not correlate with MAF and ProCT.

scholarly journals Fracture resistance of teeth obturated with two different types of Mineral Trioxide Aggregate Cements

2020 ◽  
Vol 23 (3) ◽  
Author(s):  
Nidambur Vasudev Ballal ◽  
Sheetal Rao ◽  
Junsang Yoo ◽  
Kishore Ginjupalli ◽  
Manuel Toledano ◽  
...  
Keyword(s):  
Root Canal ◽  
Fracture Resistance ◽  
Testing Machine ◽  
Positive Control ◽  
Negative Control ◽  
Control Group ◽  
Root Canals ◽  
Group I ◽  
Significant Difference ◽  
Group Ii

Objective: Endodontically obturated teeth have lower fracture resistance depending on the obturating material and technique. The purpose of this study was therefore to evaluate the influence of ProRoot MTA (Dentsply Sirona, Tulsa Division) and OrthoMTA III (BioMTA, Daejeon, Korea) as an obturating material on the fracture resistance of endodontically treated teeth. Material and Methods: Thirty extracted human maxillary central incisors were decoronated and instrumented using Protaper instruments (size F5). Irrigation was performed with 2.5% sodium hypochlorite between each instrument change followed by 7% maleic acid for one minute. Finally, canals were flushed with 5 ml of PBS solution for one minute. Samples were then divided into three groups. Group I- positive control (no root canal filling); Group II- obturation with ProRoot MTA; Group III- obturation with OrthoMTA III. Ten teeth were randomly selected as a negative control in which no treatment was performed. All the specimens were then subjected to fracture strength testing using universal testing machine. For evaluation of biomineralization, six maxillary central incisors were divided into two groups. Group I obturated with ProRoot MTA and group II obturated with OrthoMTA III. These samples were subjected to SEM analysis. Results: Positive control group demonstrated the least fracture resistance, while OrthoMTA III group showed the highest fracture resistance. There was no significant difference between negative control group and ProRoot MTA groups (p=0.821). OrthoMTA III group showed better tubular biomineralization when compared to ProRoot MTA. Conclusions: Root canals obturated with OrthoMTA III had better fracture resistance and increased tubular biomineralization compared to ProRoot MTA. Since root canals obturated with OrthoMTA III had better fracture resistance, it can be used as a promising obturating material.KeywordsBiomineralization; Fracture Resistance; OrthoMTA III; ProRoot MTA; Root Canal; Tubular.

scholarly journals Effect of Hand and Rotary Instruments on the Fracture Resistance of Teeth: An In Vitro Study

2020 ◽  
Vol 8 (2) ◽  
pp. 38
Author(s):  
Nisha Acharya ◽  
Md Riasat Hasan ◽  
Dashrath Kafle ◽  
Anil Chakradhar ◽  
Takashi Saito
Keyword(s):  
Fracture Resistance ◽  
Testing Machine ◽  
Compressive Load ◽  
In Vitro Study ◽  
Group Iv ◽  
Group Iii ◽  
Group I ◽  
Significant Difference ◽  
Group Ii

Objective: Endodontic treatment should be both conservative and effective. Endodontic instruments with a greater taper are used for coronal flaring, for proper debridement with efficient irrigation. However, increased taper of an instrument can remove a larger amount of pericervical dentin, compromising the strength of the tooth. The aim of this study was to determine the effect of hand files, ProTaper Universal, ProTaper Next, and V Taper rotary instrument systems on the fracture resistance of teeth. Materials and Methods: In total, 60 extracted human maxillary first premolars were divided into four groups—Group I (Hand Files; HF), Group II (ProTaper Universal; PT), group III (ProTaper Next; PTN) and Group IV (V Taper; VT) (N = 15). Each group was instrumented with the respective instrument system, irrigated, obturated, restored, and mounted in cold cure acrylic. A universal load-testing machine (Shimadzu, Japan) was used to apply a vertical compressive load. The maximum force was recorded in Newton. Analysis of variance (ANOVA) and Independent t-tests were applied to compare the maximum mean force required to fracture the tooth. Results: There was a statistically significant difference in fracture resistance between Group I (HF) and Group II (PT) and between Group II (PT) and Group IV (VT) (p < 0.001). Similarly, a significant difference was observed between Group II (PT) and Group III (PTN) (p < 0.01). Furthermore, a significant difference was observed between Group I (HF) and Group III (PTN), and between Group III (PTN) and Group IV (VT) (p < 0.05), too. However, there was no statistically significant difference between Group I (HF) and group IV (VT) (p > 0.05). Conclusion: Rotary files with more taper seem to remove more pericervical dentin than traditional manual and rotary files with less taper, thus altering the strength of the tooth.

scholarly journals Evaluation of the Flexural Strength of Submicron Hybrid Composite using Different Fabrication Methods: An in vitro Study

2018 ◽  
Vol 19 (2) ◽  
pp. 205-209
Author(s):  
Sameer Makkar ◽  
Achla Sethi ◽  
Kanwar Sidharth ◽  
Taranjit Kaur ◽  
Sukhpash Singh Sandhu ◽  
...  
Keyword(s):  
Flexural Strength ◽  
Hybrid Composite ◽  
Testing Machine ◽  
In Vitro Study ◽  
Finish Line ◽  
Anterior Teeth ◽  
Group I ◽  
Significant Difference ◽  
Group Ii

ABSTRACT Aim The aim of this study is to perform three-point bend test on submicron hybrid composite fabricated with direct and indirect veneer technique. Materials and methods A total of 20 maxillary anterior teeth were selected, and labial reduction of 0.5 to 0.75 mm with a chamfered finish line for veneer preparation was done. Teeth were divided into two groups depending on fabrication technique being used: group I—veneers fabricated with light and group II—veneers fabricated with light and heat (PHOTOPOL). Specimens were tested under universal testing machine (UTM) where load was applied at a crosshead speed of 1 mm/min with a pointer of 1 mm diameter. Data were statistically analyzed. Results The results showed highly significant difference between the two groups with the mean value of group I (246.7 ± 2.285 N) and group II (531.1 ± 4.411 N). Conclusion The curing mechanism involving light and heat increases the fracture resistance of the veneers. Clinical significance Within the limitations of this study, the results led to the conclusion that the association of common composites with a simple postcure heat treatment may be an alternative for current indirect composite systems, although more studies are needed to assess other properties of the composites for this application. How to cite this article Sethi A, Makkar S, Sidharth K, Kaur T, Sandhu SS, Joseph AK. Evaluation of the Flexural Strength of Submicron Hybrid Composite using Different Fabrication Methods: An in vitro Study. J Contemp Dent Pract 2018;19(2):205-209.

scholarly journals Comparison of Enamel Preparations - Bevel, Chamfer and Stair Step Chamfer on Fracture Resistance of Nano Filled Resin Composites Using Bulk Pack Technique - An In Vitro Study

2019 ◽  
Vol 7 (23) ◽  
pp. 4089-4093
Author(s):  
Jyothi Bommanagoudar ◽  
Shashidhar Chandrashekhar ◽  
Shilpa Sharma ◽  
Hiten Jain
Keyword(s):  
Fracture Resistance ◽  
Failure Load ◽  
Testing Machine ◽  
In Vitro Study ◽  
Control Group ◽  
Tooth Structure ◽  
Group I ◽  
Significant Difference ◽  
The Mean

AIM: To evaluate and compare the effect of enamel preparation designs bevel, chamfer and stair-step chamfer on the fracture resistance of nanocomposite. METHODS: The sample group of this study consisted of 72 non-carious permanent maxillary central incisors. The sample is divided into four groups of 18 each. Group, I control Group II bevel preparation, Group III chamfer preparation, group IV stair step chamfer preparation. After the specific preparation, each tooth is filled with nanocomposite using bulk pack technique. The teeth were subjected to fracture resistance test under Universal testing machine and then were examined under a stereomicroscope to evaluate the type of bond failure. The results were subjected to statistical analysis. RESULTS: Results of the One-Way ANOVA revealed a significant difference in the mean peak failure load values of the four different groups. (P < 0.001) Tukey’s Post-Hoc comparison test revealed that there was a significant difference in the mean peak failure load values of the bevel and chamfer preparation. But there was no significant difference between chamfer and stair-step chamfer preparation designs. CONCLUSION: Stair-step chamfer preparation demonstrated comparable values to Chamfer preparation but also involved the removal of less amount of tooth structure adjacent to the fractured edge and good esthetic technique.

scholarly journals Comparative Evaluation of Fracture Resistance of Endodontically Treated Teeth Restored with Resin Fiber Post and Stainless Steel Post: An In Vitro Study

2015 ◽  
Vol 03 (02) ◽  
pp. 080-084
Author(s):  
Vijay Singh ◽  
Poonam Bogra ◽  
Saurabh Gupta ◽  
Navneet Kukreja ◽  
Neha Gupta
Keyword(s):  
Stainless Steel ◽  
Fracture Resistance ◽  
Testing Machine ◽  
Compressive Force ◽  
Control Group ◽  
Fiber Post ◽  
Endodontically Treated Teeth ◽  
Group I ◽  
Significant Difference

AbstractFracture resistance of endodontically treated teeth restored with post. Aims: This study aims to compare the fracture resistance of endodontically treated teeth restored with resin fiber and stainless steel post. Commercially available prefabricated resin fiber post(Dentsply Maillefer Easy Post), prefabricated stainless steel post(Coltene/Whaledent Parapost) were used. Methods and Material: Forty five maxillary central incisors were obturated and divided into 3 groups: Control Group (Group I) without any post (n = 15), Resin Fiber Post Group (Group II) (n = 15) and Stainless Steel Post Group (Group III) (n = 15). In all Groups except control group, post space was prepared; a post was cemented, and a core build-up was provided. All the specimens were subjected to compressive force under a universal testing machine until fracture. Statistical analysis used: The results were analyzed using the variable analysis test (ANOVA). Results: One-way analysis of variance revealed significant difference among test groups. The control group demonstrated highest fracture resistance (925.2183 N), followed by the resin fiber post group (486.7265 N) and stainless steel post group (423.539N). Conclusions: Teeth restored with resin fiber post showed higher fracture resistance values than prefabricated stainless steel post.

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