Tuesday, August 4, 2015
Friday, May 8, 2015
Jerry Nelson to deliver John Valentine Merson Lecture in San Francisco
Each year at the AAO Annual Session, a speaker is selected to deliver the John Valentine Mershon Memorial Lecture. This year, it will be delivered March 17, 2015 by Gerald Nelson, DDS, Health Sciences Clinical Professor in the Division of Orthodontics, UCSF School of Dentistry. The title of his talk is Target Approach to Treatment Planning. Dr Nelson was as Associate Editor of the AJO-DO for many years, and is well known to Journal readers.
|John Valentine Mershon|
John Valentine Mershon (1867-1953) was a generous, unpretentious man. After studying with Angle in 1908, he limited his Philadelphia practice to orthodontics. Believing that biology would always trump mechanics, he favored tooth movement through gentle pressure. He studied relapse and developed the Mershon lingual arch—the first “invisible” appliance. He did not patent his appliance, wanting it to remain affordable. He taught seminars in his office and later at universities, and accepted no payment for these services. Recognizing his value as a teacher, the AAO established the John Valentine Mershon Memorial Lecture in 1960. This year, he was voted one of the 100 most influential people in orthodontics of the last 100 years.
Read about John Valentine Mershon in the May 2015 issue of the AJO-DO.
Wednesday, May 6, 2015
Listen and watch as the authors discuss the findings of their research, Impact of malocclusion and common oral diseases on oral health–related quality of life in young adults. Their article is published in the May 2015 issue of the Journal.
Tuesday, May 5, 2015
When Charles V. Mosby and Martin Dewey launched their new journal in 1915, they gave it a name that seemed to say it all: International Journal of Orthodontia. But almost immediately, they realized that the name did not adequately represent all they intended. “In our endeavors to conduct a journal for the advancement of orthodontia, we early realized that orthodontia consists of more than mere regulating appliances, and that it would be necessary to broaden our scope in order to get articles bearing on all its phases.” In 1919, the editors changed the name of the journal for the first time -- an act they would repeat half a dozen times in 100 years.
Learn about the Journal's changing name in "A Journal by any other name" in the Centennial Supplement.
Friday, May 1, 2015
Throughout 2015, we are celebrating 100 years of Journal publishing. In the May issue, look for two editorials entitled "Who is an orthodontist?" The first was written by the Journal's first editor, Martin Dewey, and was originally published in 1915. In his Reprise for 2015, the Journal's current Editor-in-Chief, Rolf G. Behrents, examines how things have changed in the last 100 years.
Monday, April 27, 2015
Dental Curing Light: Benefits and Hazards of Blue Light
In dentistry and orthodontics in particular, the dentist and staff are acutely exposed to blue light, via the LED Curing Light. We don't stare at the sun, but we do spend a lot of time staring
at a composite curing light whether restoring a tooth, or placing an orthodontic bracket.
Historically, bands were cemented on the teeth or a two part chemical care system was used to place orthodontic brackets. Currently most orthodontists are using the light cure system to place brackets. Most of the orthodontic residency programs are using the LED curing light because of the increased flexibility, accuracy, working time, and reduced bonding (curing) time. The new curing lights are more powerful and rechargeable with three- to twenty-second cures.
Blue light is short wavelength visible blue light and generates the highest energy of the spectrum. When this high energy visible blue light (HEV) 400-500nm hits the retina, it mixes with oxygen to create a destructive force 3 that destroys photoreceptors and retinal pigment epithelial cells. Over time, this process can lead to Age Related Macular Degeneration.
Blue light not only emits electromagnetic radiation, but is also responsible for controlling your circadian rhythm; ie, your sleep cycle via suppression of melatonin production. Melatonin has a potent anti-inflammatory and anti-carcinogenic benefit. When you are exposed to the blue wavelength of light, your brain receives the signal that it is daytime, and responds by suppressing melatonin.
We are exposed to more blue light today than ever before. Outdoors, the sky is blue (from blue light), and indoors we face multiple blue light hazards from television screen, computer screens, I-pad screens, smart phone screens, and LED dental curing lights. We light our homes and offices with energy efficient CFL and fluorescent bulbs that have a high blue spectral emission.
It is estimated that 1.8 million Americans suffer from Age Related Macular Degeneration. This is the number one cause of blindness in America. These numbers are expected to double in the next few decades.2 "Our society could be facing an unprecedented public health crisis in the form of vision loss if the magnitude of blue light exposure continues unchecked."3
We as practitioners and consumers are conducting a natural experiment on ourselves
and we must wear protective equipment to reduce ocular injury.
The JADA recommends that we use protective (orange) glasses and/or shields that meet the
ANSI Z87.1-2003 standard. The glasses filter out 98% of the blue light frequencies. We should not stare directly at the light.
As of now, no one has the conclusive answers and more research needs to be done. Be proactive and use protective gear for your own personal safety and the safety of your staff while
using the curing blue light for all of its benefits.
Schuylkill Haven, PA
1. Mercola J. The Importance of Sleep and the Hazards of "Dream Deprivation." Mercola. com. 07/13/2014
2.Eichenbaum JW. Geriatric vision loss due to cataracts, macular degeneration, and glaucoma. Mt. Sinai J Med. 2012 March-Apr;79(2)276-94
3.Morgan,Gl,Talentino M. Popularity of electronic devices, "greener" light bulbs, increases blue light exposure. Primary Care, Optometry News Oct 2012