Tuesday, August 31, 2010

The CEREC® 25th Anniversary Celebration Will Be Remembered as a Milestone Event in Dentistry

Long Island City, NY (August 30th, 2010) – Sirona Dental Systems’ (Nasdaq: SIRO) CEREC 25th Anniversary Celebration (CEREC 25) may be over, but it will not be soon forgotten, according to the majority of the more than 3,000 attendees and more than a dozen keynote speakers who participated in the milestone event celebrating the 25-year anniversary of the CEREC CAD/CAM system.

Among the many announcements made and topics explored during CEREC 25, were the following:

CEREC-GALILEOS™ Integration: A Surgeon’s Perspective by Dr. Jay Reznick: A progressive oral surgeon, Dr. Reznick explained why the integration of CEREC CAD/CAM information into GALILEOS Implant Planning Software enables dental implant planning and surgical techniques that are far superior to traditional 2-dimensional imaging and “freehand” placement of dental implants. The result: a less-invasive surgical procedure, awareness of anatomical challenges ahead of time, increased precision of implant placement, reduced surgical time, and enhanced patient recovery.

CEREC Connect and Digital Impressioning by Dr. Michael Skramstad: Dr. Skramstad illustrated how to use the CEREC AC and CEREC Connect software to advantage and how combining CEREC chairside techniques with CEREC Connect maximizes the use of digital technology and communication with the lab, for the fabrication of everything from simple single units and implants to complex anterior cases.

The Expansion of infiniDent: Sirona’s Internet-based service that caters exclusively to Sirona inLab® and inEos® Blue users is now under the new management of lab industry veteran Bob Vasile, with the range of materials and indications expanded to include full-contour restorations and veneers made from Ivoclar Vivadent®’s IPS e.max® CAD lithium disilicate and VITA®’s new RealLife® material.

Dental and dental lab professionals networked with dental industry icons who conducted illuminating continuing education programs that included clinical techniques, hands-on workshops, and dynamic lectures on practice management, marketing, and hygiene. Some additional announcements and session highlights included the following:

The Evolution of the CEREC System by Prof. Dr. Werner Mörmann: Who better to give this presentation but the original developer of the CEREC system? Dr. Mörmann explained CEREC’s humble beginnings as a small, mobile CAD/CAM unit integrating a computer with a monitor and keyboard, trackball, foot pedal, and an opto-electronic 3D-scanning-mouth camera, and its evolution into the CEREC AC unit with Bluecam™ and CEREC Connect, which now represents the industry’s most advanced CAD/CAM technology for the dentist and dental technician.

The Introduction of the Sirona Speakers Academy: This speaking training program provides both new and experienced speakers with coaching and strategies for delivering more distinctive and compelling presentations. Graduates of the Speaker’s Academy become preferred speakers within the Sirona community and gain access to the latest information regarding trends, market data, and product introductions within the category of digital restorative dentistry and imaging, thereby ensuring their presentation content is as accurate and timely as possible. The Academy features three-day workshops taught by renowned speaking coach Dr. Paul Homoly, CSP (Certified Speaking Professional), who has been a consultant to dental professionals on various aspects of communication for over two decades.

“The CEREC 25th Anniversary Celebration was the launch for many new programs and services because we wanted our attendees to be on the inside track throughout this exciting and important event,” explained Michael Augins, President, Sirona USA.

CEREC 25 also featured three days of non-stop activities, in which participants could earn up to 18 CE credits while enjoying CAD/CAM-focused workshops, premium entertainment, and plenty of memorable celebrations among the luxurious accommodations provided by Caesars Palace.

Sirona and guests closed CEREC 25 on Saturday night in true Vegas style at the sophisticated WHITE PARTY, which took place at the popular PURE Nightclub. Most attendees agreed that the WHITE PARTY was the hottest dental event of the decade.

“This may have been the most memorable and exciting three days of my career,” exclaimed Michael Augins, President, Sirona USA. “The high level of continuing education programs, networking opportunities, and entertainment activity was a worthy tribute to the technology that changed the face of dentistry. This milestone event not only celebrated the first 25 years of CEREC CAD/CAM, it kicked off the next 25 years of Sirona innovation.”

About Sirona Dental Systems, LLC

Sirona, the dental technology leader, has served dealers and dentists worldwide for more than 130 years. Sirona develops, manufactures, and markets a complete line of dental products, including CAD/CAM restoration systems (CEREC); digital intra-oral, panoramic, and 3D imaging systems; dental treatment centers; and handpieces. Visit http://www.sirona.com for more information about Sirona and its products.

Saturday, August 28, 2010

2 Announcments From Cerec 25

Sirona Dental Systems Announces the Launch of its Speakers Academy

Long Island City, NY (August 27, 2010) – In an effort to help provide timely and accurate education and information regarding the quickly evolving category of digital restorative dentistry and imaging to the dental community, Sirona Dental Systems, LLC (Nasdaq: SIRO) announced today the introduction of the Sirona Speakers Academy. This announcement was made during the CEREC® 25th Anniversary Celebration being held at Caesars Palace, Las Vegas, Nevada to commemorate the anniversary of Sirona’s flagship dental CAD/CAM and digital impression product line.

The Sirona Speakers Academy is designed for both new and experienced speakers alike, providing coaching strategies for delivering more distinctive and compelling presentations. Graduates of the Speakers Academy become preferred speakers within the Sirona community and gain access to the latest information regarding trends, market data, and product introductions within the category of digital restorative dentistry and imaging, thereby ensuring their presentation content is as accurate and timely as possible.

The three-day workshops are being taught by renowned speaking coach Dr. Paul Homoly, CSP (Certified Speaking Professional), who has been a consultant to dental professionals on various aspects of communication for over two decades.

“There is a surge of interest regarding the topic of digital dentistry, and the market is becoming cluttered with conflicting information,” explains Michael Augins, President, Sirona USA. “As the industry’s leading provider of digital technologies, we are committed to helping those interested in providing peer-to-peer education on this timely subject and excelling professionally while playing an active role in the advancement of digital restorative dentistry.”

Graduates of the program become eligible for membership within the company’s Speakers Bureau, and receive a selection of marketing and management tools to help them exceed.

Enrollment in the Speakers Academy is open to all industry professionals, including dentists, laboratory technicians, dental team members, consultants, and dental supply professionals who are current advocates of Sirona and are committed to advancing the field of digital restorative dentistry.

Three three-day workshops are being offered from December 2010 – March 2011 in Charlotte, NC:

• Thursday, Friday, and Saturday, December 9,10, and 11, 2010
• Thursday, Friday, and Saturday, January 20, 21, and 22, 2011
• Thursday, Friday, and Saturday, March 17, 18, and 19, 2011

Participation is limited to 10 attendees per workshop on a first-come, first-served basis.

For more information and/or to enroll in the Sirona Speaker’s Academy, please contact Homoly Communications at 800-294-9370.

Sirona Launches inLab® Multilayer Design Software that Utilizes
VITA® Rapid Layer Technology at the CEREC® 25th Anniversary Celebration in Las Vegas

Rapid Layer Technology Enables the Production of Both the Substructure and Accompanying Full-Contour Overlay With a Few Mouse Clicks

Long Island City, NY (August 26th, 2010) – Sirona Dental Systems (Nasdaq: SIRO) today announced the availability of the inLab Multilayer Design Option, which utilizes new VITA Rapid Layer Technology, during the CEREC® 25th Anniversary Celebration, a milestone event celebrating the 25-year anniversary of its CEREC CAD/CAM system.

VITA Rapid Layer Technology is a high-speed bridge production technique that utilizes innovative Sirona inLab V3.80 software, along with the Sirona inLab MC XL milling unit, to mill both the framework and corresponding full-contour overlay with a few mouse clicks. Natural-looking veneer structures can now be manufactured quickly and simply.

This fully computerized process guarantees efficient production of the substructure and overlay structure at once, producing fully anatomical bridges and crowns without the need for traditional waxing, porcelain layering or pressing.

Using Sirona inLab V3.80 software, the VITA Rapid Layer Technology process starts with the generation of the anatomical multi-unit bridge or crown on screen. The software automatically calculates the data for both the substructure and fully contoured overlay within a few seconds.

The framework is then milled from a VITA In-Ceram® YZ block, and the full-contour overlay is milled from VITABLOCS TriLuxe forte polychromatic ceramic, perfectly matching the VITA YZ substructure with an adhesive luting composite, creating a long-lasting bond between the substructure and veneering ceramic for an esthetic bridge restoration with long-term durability.
VITA, In-Ceram, and VITABLOCS are registered trademarks of VITA Zahnfabrik H. Rauter GmbH & Co.

Friday, August 27, 2010

The CEREC® 25th Anniversary Celebration (CEREC 25) Has Begun

The CEREC® 25th Anniversary Celebration (CEREC 25)
Has Begun

More than 3,000 Dental Professionals Descend Upon
Las Vegas for Three Days of A-List Speakers, Hands-On Workshops
and Legendary Vegas Entertainment

Long Island City, NY (August 26th, 2010) – The doors have opened on Sirona Dental Systems’ (Nasdaq: SIRO) CEREC 25th Anniversary Celebration (CEREC 25), a milestone event celebrating the 25-year anniversary of its CEREC CAD/CAM system.

Attended by thousands of dental and dental lab professionals and hosted at the legendary Caesars Palace, CEREC 25 will continue for three days of non-stop activities in Las Vegas, the entertainment mecca of the world, and only from Sirona, the originator, innovator, and undisputed market leader in dental CAD/CAM.

Participants can earn up to 18 CE credits while enjoying CAD/CAM-focused workshops, premium entertainment, and plenty of memorable celebrations among the luxurious accommodations provided by Caesars Palace. 

Sirona has enlisted a “who's who” of digital restorative dentistry comprised of the most prominent lecturers in the dental and lab community, including:

  • Dr. Gordon Christensen, MSD, PhD
  • Dr. Rella Christensen, RDH, PhD
  • Dr. Dennis Fasbinder, MAGD, ABGD
  • Mr. Jim Glidewell, CDT
  • Dr. Paul Homoly
  • Mr. Imtiaz Manji, CEO, Scottsdale Center for Dentistry™
  • Dr. Edward A. McLaren
  • Prof. Dr. Albert Mehl
  • Dr. Mark Morin
  • Prof. Dr. Werner H. Mörmann
  • Mr. Bill Mrazek, CDT
  • Dr. Sameer Puri
  • Mr. Matt Roberts, AACD
  • Dr. David Roessler
  • Dr. Frank Spear, and many more!    

These dental industry icons are conducting a full spectrum of continuing education programs that include clinical techniques, hands-on workshops, and dynamic lectures on practice management, marketing, and hygiene. 

For the next three days, Las Vegas is the epicenter of the most advanced dental CAD/CAM education and training.  Attendees can also explore the CEREC 25 exhibit hall, showcasing top dental companies and their products and services. 

CEREC 25’s star-studded celebrity entertainment is continuing throughout the three-day extravaganza, and includes special appearances by Olympic Gold Medalist Rulon Gardner, the Second City Comedy Troupe, and five-time Emmy® Award-winning comedian and actor Dennis Miller. 

Attendees are also invited to celebrate in true Vegas style at the sophisticated WHITE PARTY taking place at the popular PURE Nightclub on Saturday night.  The WHITE PARTY promises to be the hottest dental event of the decade!  What’s more, an “Entertainment-Only Pass” is also available for a spouse or guest who chooses to attend social events only. 

“CEREC 25 is the place to be if you are a dental professional thirsty for the latest information and training on CAD/CAM and digital dentistry,” states Michael Augins, President, Sirona USA.  “The CEREC 25 celebration is a one-of-a-kind event and the largest gathering of CEREC users ever assembled.”

Thursday, August 26, 2010

Effect of three radicular dentine treatments and two luting cements on the regional bond strength of quartz fibre posts

Effect of three radicular dentine treatments and two luting cements on the regional bond strength of quartz fibre posts

Haiyan Mao, Yaming Chen, Kevin H-K. Yip and Roger J. Smales
DOI: 10.1007/s00784-010-0453-3


The purpose was to investigate by push-out tests and scanning electron microscopy (SEM)/energy-dispersive spectroscopy (EDS) the effect, after first acid etching the post space walls, of three radicular dentine treatments on the regional bond strength of quartz fibre posts placed using two heavily filled resin luting cements. The crowns of 39 extracted maxillary central incisors were sectioned transversely 2 mm coronal to the labial cement-enamel junction and the roots endodontically treated. After standardized post space preparations and etching 15 s with 32% phosphoric acid, 36 roots were randomly divided into six equal groups. Quartz fibre posts (D.T. LIGHT-POST) were placed using three radicular dentine treatments (0.9% sodium chloride (NaCl) for 60 s, 10% sodium hypochlorite (NaOCl) for 60 s, 17% ethylenediaminetetraacetic acid (EDTA) for 60 s followed by 5.25% NaOCl for 60 s) and two resin composite luting cements (ONE-STEP PLUS/DUO-LINK; ONE-STEP PLUS/LuxaCore Dual). Transverse segments (S1–S7), 1.00 mm (SD = 0.05 mm) thick, were sectioned from the coronal 8 mm of each root. Push-out bond strength tests were performed on coronal, middle and apical post space segments (S2, S4, S6) at a crosshead speed of 0.5 mm/min. Data were recorded and analyzed using a two-way mixed ANOVA design (a =  0.05). Three segments (S1, S5, S7) from roots in each group were examined using SEM/EDS. After post space preparation, acid etching and using each of the three radicular dentine treatments, the three remaining roots were sectioned longitudinally for SEM observation of the post space walls. At all root segment sites, the mean bond strengths from using 0.9% NaCl were significantly lower than for the other two radicular dentine treatments (P ≤ 0.02), and DUO-LINK cement had significantly higher mean bond strengths than LuxaCore Dual cement (P ≤ 0.01). There was a significant linear trend for reduced bond strengths from coronal to apical post space segments (P  < 0.001), which was supported by the SEM/EDS observations of dentine tubule appearance and resin tag formation. Acid etching followed by either 10% NaOCl or 17% EDTA and 5.25% NaOCl dentine treatments of the post spaces provided good adhesion and resin luting cement tag infiltration of dentinal tubules in the coronal and middle segments in particular.

Wednesday, August 25, 2010

Color differences between artificial and natural teeth in removable partial denture wearers.

Bull Tokyo Dent Coll. 2010;51(2):65-8.
Department of Removable Prosthodontics and Gerodontology, Tokyo Dental College, Mihama-ku, Chiba, Japan. uedat@tdc.ac.jp


The purpose of this study was to investigate differences between natural tooth color and that selected for artificial teeth in partial dentures at our department with a view to establishing criteria for obtaining greater harmonization between colors. The participants in this study comprised partial denture wearers visiting the Department of Prosthodontics, Tokyo Dental College Chiba Hospital, in whom both artificial teeth and natural teeth were present in the maxillary anterior tooth area. Natural tooth color was measured according to VITA classical shade guide number using a dental color measurement apparatus. Artificial tooth color in partial dentures produced at our department was investigated by referring to medical records. Color of 28 participants' natural teeth and 345 participants' artificial teeth was investigated. Differences in color distribution between the natural and artificial tooth were analyzed using the Fisher exact test. The most frequent color of natural tooth was C-type, accounting for 39%, followed by D- at 32%, A-at 22% and B-type at 7%. In terms of artificial tooth color, A-type was the most common (97%). The color distribution of natural teeth differed significantly from that of artificial teeth in partial dentures. These results suggest that artificial tooth color did not harmonize with the color of the natural teeth in partial denture wearers.

Tuesday, August 24, 2010

Erosion-inhibiting potential of a stannous chloride-containing fluoride solution under acid flow conditions in vitro

 Archives of Oral Biology
Volume 55, Issue 9, Pages 702-705 (September 2010)


This study aimed to analyse the erosion-inhibiting potential of a single application of stannous chloride-containing fluoride solution on pellicle-covered enamel and dentine under constant acid flow conditions in vitro.
Bovine enamel (n=60) and dentine (n=60) samples were exposed 1h to the oral cavity of 4 healthy volunteers to allow for in situ pellicle formation. Pellicle-covered samples were randomly assigned to three groups (each n=20 enamel and n=20 dentine samples; 5 enamel and 5 dentine samples/volunteer) and treated once with a SnCl2/AmF/NaF (800ppm Sn(II), 500ppm F, pH 4.5) or a NaF solution (500ppm F, pH 4.5) for 2min or remained untreated (controls). Samples were eroded with hydrochloric acid (pH 2.6) in a small erosion chamber at 60μl/min for 25min. Calcium release into the acid was monitored in consecutive 30s intervals for 5min, then at 1min intervals up to a total erosion time of 25min using the Arsenazo III procedure. Data were statistically analysed by random-effects linear models (p<0.05).
The stannous chloride-containing fluoride solution reduced calcium loss of enamel and dentine to up to 6min and 3.5min, respectively. Calcium loss (% of control) amounted from 24±7 (30s) up to 93±14 (6min) in enamel and from 38±13 (30s) to 87±15 (3.5min) in dentine. The sodium fluoride solution was unable to reduce enamel and dentine erosion at any time point.
A single application of a stannous chloride-containing fluoride solution reduced enamel and dentine erosion up to 6min and 3.5min of constant acid flow, respectively.

Monday, August 23, 2010

Practiceworks to become Carestream Dental

Effective September 1,2010 Practiceworks will operate as Carestream Dental LLC. This is only a name change and there will be no change to the Practiceworks company, products or services.

So it will be business as usual at Practiceworks, just a new name. For more information go to www.kodakdental.com

Saturday, August 21, 2010

Genetic Test Used By Landmark Dental School Study To Help Predict Gum Disease

Genetic Test Used By Landmark Dental School Study To Help Predict Gum Disease

13 Aug 2010

University of Michigan School of Dentistry has signed an agreement with Interleukin Genetics Inc. to conduct what may be the largest clinical study to date using genetic testing to assess the risk for gum disease.

William Giannobile, professor at U-M dentistry and director of the Michigan Center for Oral Health Research at the School of Dentistry, will lead the study for U-M.

"It's an exciting study because it's a way to use genetic testing to personalize a dental treatment plan and the frequency of dental care visits of patients as it relates to oral care," said Giannobile. "It's a way to customize patient care."

"One of the goals of personalized health care is to detect disease earlier and prevent it more effectively," said Kenneth Kornman, president and chief scientific officer of Waltham, Mass. based-Interleukin. The study will use Interleukin's PST test as one part of a periodontitis risk assessment, said Kornman, who is also an alumnus of the U-M Dental School. Research has shown that genetics plays a large role in gum disease, and research also suggests that severe gum disease is a risk factor for other chronic disease complications such as heart disease or low birth weight.

U-M scientists will examine 15 years of patient clinical outcome data provided by a Michigan-based insurance company. Scientists will then recruit at least 4,000 of those patients and get their genetic information using the PST, Giannobile said.

They will combine this genetic information with two other common risk factors, smoking and diabetes, then measure tooth survival rates to see how those results lined up with the treatment plans people received over the 15 years. Some patients may have needed more dental visits, some may have required less, Giannobile said.

The PST genetic test works by identifying genetic variations that are predictive of severe gum disease and tooth loss in some patients. The test may be used on all ethnic populations and must only be given once in a lifetime to identify at-risk patients. Specifically, the test identifies genetic variants that regulate a protein that when overexpressed, is thought to be associated with destruction of soft tissue attachment and bone and increased severity of gum disease in certain patients.

Interleukin's test can be used in dental offices and is available in all U.S. states including New York, which monitors the accuracy and reliability of results of laboratory tests and sets one of the highest accreditation standards in the country for genetic testing companies. The company hopes the study results establish reimbursement coverage for the test. The insurance company would not have access to any genetic information, Giannobile said. The information would allow the dentist to make a more informed treatment protocol.

An estimated 75 percent of American adults have some form of gum disease, and roughly 20-25 percent have moderate to severe cases which can lead to tooth loss. The year-long study begins in the fall.

Friday, August 20, 2010

ClikRay™ Green Line Eco-Friendly Sensor Covers

Buffalo Grove, Illinois – August 20, 2010:

ClikTech, Inc. announces a new line of biodegradable dental sensor barrier bags. ClikRay™ Green Line Eco-Friendly Sensor Covers are designed by a dentist and present a completely new approach to the dental practice. Each bag features soft rounded edges, an exposed lip for easy access, size imprint for each individual bag and a tear resistant biodegradable polyethylene plastic.

“A growing trend in the dental office is the move to a “green” practice. The elimination of paper and plastic products has become an important new reality.” states Harold K. Schmulenson, DDS, CEO of ClikTech, Inc. “ClikRay™ Green Line sensor covers represent a new stage in environmentally friendly dental products.”

The barrier bags come in one universal size to fit any size 0 through size 3 sensor.

 ClikRay™ sensor covers are sold in dispenser boxes of 500 each and are available through most dental dealers.

ClikTech, Inc. is an ISO 9001:2008 certified designer of digital sensor holders, x-ray film holders and related products since 2004. ClikTech, Inc. may be reached toll free at 877-251-0594 or visit their website at www.clikray.com

Thursday, August 19, 2010

IMTEC Mini Dental Implants Become 3M™ ESPE™ MDI Mini Dental Implants

IMTEC Mini Dental Implants Become
3M™ ESPE™ MDI Mini Dental Implants

ST. PAUL, Minn. – (August 17, 2010) – 3M ESPE announces the launch of a new brand for its recently acquired line of small diameter implants—3M™ ESPE™ MDI Mini Dental Implants. Formerly branded as the IMTEC Sendax MDI System, the products will be fully integrated into the 3M ESPE organization over the remainder of the year. Going forward, dentists can continue to depend on 3M ESPE for the high level of quality they have come to expect from IMTEC MDIs.
The MDI procedure is a minimally invasive treatment that allows clinicians to immediately stabilize a patient's loose denture. The 90 minute flapless placement procedure can be learned in a one -day certification course, making it a simple and profitable treatment for dentists. The MDI system consists of a 1.8, 2.1 or 2.4mm titanium alloy implant, and a retaining fixture that is incorporated into the base of a patient’s denture. To hold dentures securely in place, the o-ring in the retaining fixture snaps over the ball-shaped head of the implant. When seated, the denture gently rests on the patient’s gum tissue.
“The IMTEC MDI brand has been a global leader in small diameter implants for many years, and now, as part of 3M ESPE, we anticipate it will have an even greater reach among the dental community,” said Sean Regan, 3M ESPE Marketing Manager. “As a denture stabilization system, our MDIs can help improve many patients’ quality of life, and we are excited by the development opportunities ahead with this type of innovative treatment.”
For more information, visit www.3MESPE.com or call 1-800-634-2249.

Wednesday, August 18, 2010

Whats New In Dentrix?

I just spent the last few days in Utah with the Dentrix. I saw what is coming in G5 and the next service update. I also learned a lot more about eServices.

The biggest news was for the upcoming G5 release. Finally an SQL database structure! So what does this mean for you? There will be a lot more automation of tasks that will be available. Plus you will be able to make custom reports.

The upcoming Productivity Pack 8 will add a messaging client so you can instant message between operatories and save your hygienist a few steps when you need to do an exam.

Enhancements to the Kiosk (through eServices) will let you have patients use an iPad to enter information rather then handing them a clipboard but more importantly you can now have Dentrix use your forms! That's right! Dentrix can digitize your templates and put them on the web.

In Productivity Pack 7 there are new Practice Advisor Reports that will make looking at your practice numbers easier. Along with easier reports the reports will offer suggestions on how to improve your practice!

Profitability Coaching  ($695) is a great way for you to get the most out of Dentrix. This is beyond training. Dentrix will look at your numbers and then you will have monthly meetings with the "Coach" who will show you how to improve your numbers by getting the most out of Dentrix. This is not a replacement for a good consultant.

Also don't forget some of the eServices such as 1GB of backup that Dentrix includes in your customer fee. Contact Dentrix and take advantage of what you are already paying for. 

Tuesday, August 17, 2010

Darby Dental Supply Adding GlaxoSmithKline Oral Care Products

Darby Dental Supply Continues Product Line Expansion
by Adding GlaxoSmithKline Oral Care Products

Jericho, NY (August 13, 2010) – Darby Dental Supply, LLC, the largest all-telesales distributor of dental merchandise and small equipment, recently expanded its extensive product offering by adding a wide selection of GlaxoSmithKline (GSK) oral care products.

Under a newly-signed distribution agreement with GlaxoSmithKline, Darby is now an authorized distributor of GlaxoSmithKline’s full line of Sensodyne® and Sensodyne® ProNamel toothpastes; Biotène® hygiene and relief moisturization products; Aquafresh® toothpastes, Aquafresh® Direct® toothbrushes, and Aquafresh® White Trays®; Polident® tablets and Dentu-Crème®; Super Poligrip® denture adhesive pastes, powders, and comfort seal strips; and Abreva® On the Go cold sore treatment cream.    

According to Darby president Gary Rosenberg, “GSK is a long-standing leader in the therapeutic oral care segment of the dental industry, and we look forward to a long-term and successful partnership.  Now, dentists across the county can benefit by ordering GSK products from Darby because of our extremely competitive pricing and superior customer service, both of which are second to none.”

The GlaxoSmithKline agreement is the latest development in Darby’s aggressive product line expansion initiative.  In April of this year, Darby expanded its offerings with KaVo® handpieces and small equipment.  That same month, Darby became an authorized seller of KODAK Digital Imaging Systems products.  In September of 2009, Darby became an authorized national distributor for DCI Equipment’s chairs, stools, lights and delivery systems, as well as Pelton & Crane® subsidiary, Delta Q Sterilizers.

About Darby Dental Supply, LLC

For over 60 years, Darby Dental Supply, LLC has continued to thrive and evolve as the largest all-telesales distributor of dental merchandise and small equipment to office-based practitioners in the United States.

Through strategic distribution points, the company fulfills over one million shipments per year from leading manufacturers of dental products.  Darby is equally committed to providing in-depth training to its telesales reps and superior value to the dental professional. Darby’s efficient business model, competitive pricing, and convenient ordering system continuously save its customers time and money.  Honoring a “one customer at a time” philosophy for more than six decades has established Darby Dental Supply as one of the largest, most trusted dental distributors in the nation.  For more information, visit www.DarbyDentalSupply.com.

Monday, August 16, 2010

Effect of air-abrasion on the retention of zirconia ceramic crowns luted with different cements before and after artificial aging

A question that is always popping up is what do you use to cement zirconia crowns? This reasearch tries to help answer that question. MJ


Effect of air-abrasion on the retention of zirconia ceramic crowns luted with different cements before and after artificial aging


Dental Materials

Volume 26, Issue 9, Pages 922-928 (September 2010)

Ramez Shahin, Matthias Kern


The purpose of this in vitro study was to evaluate the effect of intaglio surface air-abrasion on the retention of CAD/CAM produced zirconia ceramic crowns cemented with three different types of cement. In addition the influence of artificial aging in masticatory simulator and thermocycling was tested.
Extracted human premolars were prepared for all-ceramic crowns (12° taper, 3mm axial length). CAD/CAM zirconia crowns were manufactured. Half of the crowns were air-abraded with 50μm alumina particles at 0.25MPa, the rest was left as machined. The crowns were luted with zinc phosphate cement (Hoffmann), glass ionomer cement (Ketac Cem), or composite resin (Panavia 21), subgroups were either stored for 3 days in 37° water bath or stored for 150 days in 37° water bath, with additional 37,500 thermal cycles (5–55°) and 300,000 cycles dynamic loading with 5kg in a masticatory simulator. Then crown retention was measured in tension at a crosshead speed of 2mm/min using a universal testing machine. Statistical analysis was performed with three-way ANOVA.
Mean retention values were ranged from 2.8 to 7.1MPa after 3 days and from 1.6 to 6.1MPa after artificial aging. Air-abrasion significantly increased crown retention (p<0.001), while artificial aging decreased retention (p=0.017). In addition, the luting material had a significant influence on retention (p<0.001) with the adhesive luting resin providing the highest retention.
The use of phosphate monomer containing composite resin on air-abraded zirconia ceramic can be recommended as most retentive luting method.