•Cyclic resistance, torsional resistance, and bending stiffness of glide path files made of different alloys were compared using custom devices.
•EdgeGlidePath made from heat-treated wire showed higher cyclic resistance than ProGlider and One G.
•One G made from conventional NiTi wire showed higher torsional resistance than EdgeGlidePath and ProGlider.
•One G made from conventional NiTi wire showed higher bending stiffness than EdgeGlidePath and ProGlider.
The aim of this study was to compare the cyclic fatigue, torsional resistance, and bending stiffness of single-file glide path preparation nickel-titanium instruments.
ProGlider (#16/progressive taper; Dentsply Sirona, Ballaigues, Switzerland), One G (#14/.03; Micro-Mega, Besancon, France), and EdgeGlidePath (#16/progressive taper; Edge Endo, Albuquerque, NM) were tested. For the bending stiffness test, the instrument was bent to a 45° angle along the main axis while 3 mm of the tip was secured. Cyclic fatigue resistance was measured during pecking movement, whereas the file was rotated within a reproducible simulated canal with a 3-mm radius and a 90° angle of curvature. The ultimate torsional strength and toughness were evaluated using a custom device. While tightly holding the end of the file at 3 mm, a rotational load of 2 rpm speed was applied until fracture. The results were analyzed using 1-way analysis of variance and Tukey post hoc comparison. A microscopic inspection was performed on the surface of a separate instrument using a scanning electron microscope.
EdgeGlidePath showed superior cyclic fatigue resistance compared with the other systems. One G showed higher maximum torsional strength than the others. One G showed the largest distortion angle and the highest toughness followed by EdgeGlidePath and ProGlider (P < .05). One G also showed larger bending stiffness than the others, whereas EdgeGlidePath showed a larger residual angle than the others (P < .05).
Conventional wire showed higher toughness and torsional resistance than M-Wire and heat-treated nickel-titanium instruments. However, heat-treated wire showed higher cyclic resistance than conventional wire and M-Wire.
Read Full Study Here: Mechanical Properties of Various Glide Path Preparation Nickel-titanium Rotary Instruments
For printable PDF version click here: Cone-beam Computed Tomographic Analysis of Canal Transportation and Centering Ability of Single-file Systems
These abstracts are Oral and Poster Research that will be presented at AAE18 . Abstracts evaluated EdgeEndo® files, with the majority of studies evaluating the EdgeTaper Platinum™ vs ProTaper® Gold. Abstracts appear as they were submitted by the presenters. The letters in the upper left corner represent the type of presentation: OR for Oral Research Presentation, PR for Research Presentation.
Read Full Article Here
Low Cost Endodontic FilesGordon’s Clinical Observations: Endodontic treatment is a nearly daily procedure for most general dentists, and the relatively low overhead makes this treatment very profitable if accomplished correctly. The introduction of lower-cost endo files has many clinicians wondering if these files are clinically acceptable and as efficient as conventional higher-cost files. CR scientists and clinicians, assisted by a survey of practitioners, help you decide if these inexpensive files are right for you.
CR CONCLUSIONS: Clinical and laboratory evaluations found the EdgeFile to have clinically acceptable performance with a cost significantly lower than other leading brands. Users noted its flexibility, strength, and ability to hold its shape. They rated file separation as similar to other brands, which was confirmed with controlled tests. Low cost makes single use of endo files a more viable option. Design features and metallurgy differ among brands, and clinicians should consider all factors when choosing files, including feel, efficiency, aggressiveness, flexibility, shape, familiarity, cost, compatibility with obturation, etc.
Click here to read the CR Foundation Report in full
Click here to read the CR Foundation Best Product 2018 Report
Articles and case studies from the users of EdgeEndo.
Dr. Leffingwell has been an EdgeEndo user for almost 4 years. He made the switch to Edge when he discovered the ability to effectively and safely navigate and shape root canal systems that previously used files could not accomplish. In this clinical case from Dr. Leffingwell, Edge files gave him the confidence to navigate the canal system after appropriate potency obtained with hand files (EdgeEndo K-file.)
Patient was a 46 year Caucasian female who presented with a chief complaint of a dull, lingering ache associated with tooth #31 (Mandibular Right Second Molar). The onset of discomfort began shortly after a carious exposure at a restorative appointment with her general dentist 2 days prior. The general dentist completed a “formocresol pulpotomy”.
After appropriate examnation, pulp testing, and radiographs, a pulpal and periapical diagnosis was provided of PREVIOUSLY INITIATED TREATMENT WITH SYMPTOMATIC APICAL PERIODONTITIS.
The patient was provided treatment options which included non-surgical endodontic therapy, removal of her tooth, or no treatment. After discussing the risk, benefits, and potential complications of each course of treatment, she elected non-surgical endodontic therapy. She would then follow up with her general dentist for a core build up and a full-cuspal coverage restoration. The patient’s medical history was reviewed and was unremarkable. She took no medications, and reported no know drug allergies. Appropriate written and verbal consent for treatment was obtained.
Local Anesthesia was obtained with 68 mg Lidocaine with 0.034 mg epinephrine via a Right Inferior Alveolar Nerve Block and Right Buccal Infiltration. A rubber dam was placed in the appropriate fashion. Access was made and the previously placed temporary restorative material and cotton pellets were removed from the access. The access cavity was refined and 3 canals were located (Mesiobuccal, Mesiolingual, and Distal). Coronal flaring was completed in a step-wise fashion using EdgeTaper SX rotary file, followed by further flaring with Gates Glidden Drills #4, #2, and #3 sequentially. A #6 Edge K-File was used to determine and achieve canal patency in all 3 canals. Once this was established a #8, #10 and #15 Edge K-Files were used via a Kerr M-4 Handpiece to further establish canal patency. Edge Gel was used copiously along with irrigating with 6 % Sodium Hypochlorite in between file sizes. Upon drying of the canals, working length (WL) was determined with a Root Zx II. The Distal canal WL was measured at 21.00 mm. The Mesiolingual and Mesiobuccal canals were measured to be 23.00 mm. Rotary instrumentation with EdgeFile rotary files X-7 series were used in a crown down fashion. Again, Edge Gel and irrigation with 6% Sodium Hypochlorite was used in a copious manner throughout. A master apical file (MAF) size of #30 was created in the distal canal. A MAF of #25 was created in both mesial canals.
A final irrigation of the canal system was completed with 6 cc of 6% Sodium Hypochlorite. The canals were dried using paper points. They were then obturated with the appropriate sized .04 Taper Dia Dent Gutta Percha points coated with Edge Seal. Warm Vertical Compaction with a System-B was used. Back fill of the canal system was completed with the Obtura II. The pulp chamber was thoroughly cleaned, then conditioned. Dyract was placed over the canal orifices and a cotton pellet and Cavit were placed to temporarily restore the access cavity. The patient was subsequently referred back to her general dentist for permanent restorative care.
Dr. Leffingwell earned his Doctor of Dental Surgery (D.D.S.) with distinction from the University of Oklahoma College of Dentistry. He then entered the United States Navy as a dental officer. Dr. Leffingwell completed a General Practice Residency at Naval Hospital Camp Pendleton Marine Corps Base, California. Following his residency, he was assigned to Fleet Hospital/Naval Hospital in Jacksonville, Florida. After being honorably discharged from active duty, Dr. Leffingwell earned his specialty certificate in Endodontics from the University of Nebraska Medical Center College of Dentistry.
Lincoln Endodontics began in January 2006 when Dr. Leffingwell purchased the practice of Dr. Merlyn Vogt. Prior to practicing in Lincoln, Dr. Leffingwell practiced in Joplin, Missouri. He is an active member of numerous professional organizations including the American Association of Endodontists, American Dental Association, Nebraska Endodontic Association, Nebraska Dental Association, the Lincoln District Dental Association, and Delta Sigma Delta.
Dr. Leffingwell is married to Karla Dawn Maddux, formerly of Imperial, Nebraska. She is a Corporate Trainer and College Business Instructor. The Leffingwells are avid outdoorsmen. They also own King Twist Quarter Horses and raise, train, and show American Quarter Horses. They both compete in timed and cutting horse events.
Articles and case studies from the users of EdgeEndo.
This case study has been republished with permission from Dr. Justin Jergensen
Root canals on second molars can be a tough job, but EdgeEndo flexible files seem to help in performing root canals in those hard to reach areas.
Truth, this patient has some bone loss. Her periodontium has been battered, but she has a healthy mouth now and wants to keep her teeth strong and fighting. The initial punch, a filling long ago placed near the pulp chamber finally wears its way in. Acute pulpitis of the irreversible kind, a real sucker.
Upper second molars are the hardest sites to perform a root canal. Yet, with the EdgeEndo files I can float like a butterfly and sting like a bee, opening up those canals even in the hard to reach molars. EdgeEndo files help me stick to a predictable protocol for any root canal from anterior to teeth touching the tonsils. After opening each canal, cleaning and shaping is worry free and predictable without getting strung up against the ropes.
The EdgeEndo is the uppercut knockout punch; the cost is right and the file finds it’s path right to the apex every time!
With his father as a dentist, Dr. Jergensen knew since he started college he would enjoy being a dentist. Dr. Justin Jergensen received his Bachelors degree from BYU in Zoology and did his dental school training at University CA San Francisco. After merging into his dad’s dental office he tried out EdgeEndo files and has used them for two years now, he was able to switch his father over to Edge too. He enjoys endodontics because he can save teeth from being extracted and relieving pain is rewarding to him. What makes Dr. Jergensen an EdgeEndo believer? “I love the way EdgeEndo makes their products affordable and their fields all the hard work for me without any breakage. I find the breakage very minimal and I love the flexibility of the files.”
EdgeEndo files make clean and shaping root canals so simple and effective. If you have not tried them, you are missing out.
Use exactly like ProTaper® Gold.
Unmatched Strength,
Flexibility & Compatibility
Use exactly like Vortex®, Vortex® Blue and EndoSequence®
For GT® and GTX® Users
EdgeEndo® files continue to be recognized as superior files. Many manufacturers are focused on refining the performance of NiTi. In recent studies conducted by university students and presented at the AAE conference, EdgeFile® was shown to be significantly more resistant to cyclic fatigue. Cyclic fatigue of a NiTi file occurs when the metal blade is subjected to repeated cycles of tension and compression that lead to stress and hardening of the material. In this study the six rotary files were tested for cyclic fatigue in an artificial canal. The survival of the instruments were tested using Weibull reliability test.
Introduction
Cyclic fatigue occurs due to recurrent tension and compression inside the curved canals that leads to crack formation and propagation that progresses until failure. Many factors affect instrument cyclic fatigue including the type of wire that the instrument is made of, instrument design, instrumentation motion and surface integrity.
The efforts of manufacturers are consistently focused on refining the performance of instruments and increasing their resistance to fracture. Instrument modifications include surface electropolishing, changes in the file design and cross section and the use of reciprocating motions rather than continuous motions.
Recently, Thermal treatment optimizes the microstructure and maximizes the flexibility and resistance to cyclic fatigue of an instrument.
Today, instruments make of controlled memory wires have been introduced to the market and exhibit greater resistance to cyclic fatigue that regular NiTi alloys.
Aim
To compare the cyclic fatigue of six rotary instruments with different nickel-titanium (NiTi) wires.
Method
F2 ProTaper Universal® (PT) and ProTaper Gold® (PTG) (Dentsply, Tulsa Dental Specialties, Tulsa OK, USA), C2 EdgeFile® (EF) (EdgeEndo, Albuquerque NM, USA), R25 RECIPROC® (RC) (VDW, Munich, Germany), Primary WaveOne® (WO) (Dentsply, Taillefer, Ballaigues, Switzerland), and #25 OneShape® (OS) (Micro-Mega, Besancon Cedex, France) (n-15 instruments) were tested for cyclic fatigue in an artificial canal with a 6-mm radium and a 45 degree curvature. The artificial canal within a stainless steel block was milled by using laser with the aid of computer program which reproduced the instrument size and taper and preserved the instruments trajectory that was adapted to the parameters selected. Number of cycles to fatigue (NCF) was recorded; the lateral surface and fractured face of segments were examined using scanning electron microscopy (SEM) and the cross sectional area was measured. One-way ANOVAs and Games-Howell tests were utilized for data analysis.
Results
The EdgeFile had significantly greater resistance to cyclic fatigue, followed by the RC, WO, PTG, OS and PT (p<0.05). The WO and RC were significantly more resistant to cyclic fatigue than the PTG, OS, and PT.
No significant difference was found between the OS and the PTG (p<0.05), and the PT exhibited the lowest resistance to cyclic fatigue compared to the other systems (p<0.05).
Conclusion
The EdgeFile® was significantly more resistant to cyclic fatigue and was followed by the RECIPROC, WaveOne, ProTaper Gold, OneShape and ProTaper rotary files.
The improvements to rotary instruments were proven to increase their resistances to cyclic fatigue.
EdgeEndo® proprietary heat treatment process called FireWire™ has created NiTi unmatched flexibility and resistance to cyclic fatigue. FireWire™ NiTi files provide cyclic fatigue resistance many times greater than other NiTi files. The increased flexibility of Heat treated NiTi allows files to better follow the canal, but EdgeEndo® FireWire™ NiTi does away with shape memory and “Bounce Back” and therefore gives incredible canal contouring capability. Dentin is preserved and canals in apical third are preserved.
*Based on Internal Testing. Click here for testing methodology.
