Topics of the day:
1. ESCO - The Electronic Study Club for Orthodontics
2. SASSOUNI (S 5.1) RE-CLARIFICATION OF HOW TO LOCATE CENTER "O"
3. NIKON COOLPIX 5000
4. Response to the extraction question
5. hydrofluoric etch
6. Fellowship in Craniofacial Orthodontics
8. Nikon Coolpix 5000
9. Nikon CoolPix 5000
10. Fasomax effects on tooth movement
11. Sunday bite
The Electronic Study Club for Orthodontics (ESCO) is a free forum for exchange of information and opinions among orthodontists, and for distribution of professional information, sponsored by the Department of Orthodontics, University of Illinois at Chicago. Information distributed on this list-server is NOT edited or refereed, and it represents only the opinions of the writers of the individual messages. Such writers bear the sole responsibility for the content of messages they author. Authors are required to verify information regarding other parties included in their messages.
* What information can you get on ESCO?
* How to subscribe to ESCO?
* How to change your address?
* How to post messages on ESCO?
* How to get copies of old digests of ESCO?
For answers to these questions and more, please check our web site:
To view and search old digests, please view our web site:
To view case presentations and case discussions, sponsored by Orthocad, please check our site at:
http:// www.orthocad.com /presentations/
Enjoy your reading!
Joseph H. Zernik, D.M.D. Ph.D.
Professor of Orthodontics
From: PAUL JOHNSON [p8johnson@YAHOO.COM]
Sent: Mon 3/10/2003 9:27 PM
Subject: SASSOUNI (S 5.1) RE-CLARIFICATION OF HOW TO LOCATE CENTER "O"
S 5.1 A message arrived from Belgium that is very important:
From: "Peter De Wilde" < email@example.com >
To: "'PAUL JOHNSON'" < p8johnson@YAHOO.COM >
Subject: RE: Sassouni
Date: Sat, 8 Mar 2003 23:39:50 +0100
The way you clarify the construction of the centre O in the Sassouni analysis ( S 5) doesn't seem consistent to me. How many are the most divergent planes? (P.J.'s answer: four) If you take only 2, then you get always a convergent point and not a converging area. If you take 3 planes: which should be left out? When should you consider to take account of all 4 planes? In my way of constructing the O-point, I use every one of the 4 planes without exception, drawing vertical line pieces at every cross point between those planes. These line pieces extend from the most superior to the most inferior plane in that specific region. The mid point of the shortest connecting line piece is the centre O. Have I been wrong al these years? (Answer: No, you have not been wrong)
Peter De Wilde,
From: Kirshon Family [mkirshon@BIGPOND.NET.AU]
Sent: Tue 3/11/2003 4:29 AM
Subject: NIKON COOLPIX 5000
TO DR ROBERT GANGE
I am planning my third "venture" into digital at my office, and hope to purchase a camera after the AAO in May.
At present I am still happy with my conventional Olympus OM2n with 90mm macro Vivitar and Olympus TTL ringflash.
(I have had little success with Olympus and Kodak digital cameras some 4-5 years ago)
Are you happy with the Nikon ?.....I had tentatively decided to buy the FUJI PRO (or Nikon equivalent) and attach a conventional 90 mm macro lens/ringflash....but perhaps this is overkill - somehow think I dont need an SLR again.
Is the Nikon is easy to use without having to attach close-up lenses etc ?
Ringlight (on website) looks great for illumination.
Any advice/input appreciated.
From: PAUL JOHNSON [p8johnson@YAHOO.COM]
Sent: Tue 3/11/2003 11:54 AM
Subject: Response to the extraction question
Dear Dr. Gupta,
The extraction decision is the most difficult, and far-reaching, thing in orthodontics. A clue may hopefully be found in this digest: Sassouni 5.1. My opinion is that of all the diagnostic tools we have this cephalometric analysis is the best aid available to determine when units must be removed.
Tustin, CA USA
> DEAR GROUP,
> CAN ANYBODY SUGGEST ME WHERE TO FIND MATERIAL ON THE INTERNET ABOUT THE TOPIC "EXRACTION VS NON EXTRACTION TREATMENT DECISIONS"?
> THANKS A.G.
Sent: Tue 3/11/2003 6:06 PM
Subject: hydrofluoric etch
Many of us use hydrofluoric etch when bonding to porcelain. Would it also work as the etch of choice when bonding to a large composite restoration since composite is largely quartz filler?
From: Barry Grayson [barry.grayson@MED.NYU.EDU]
Sent: Wed 3/12/2003 2:54 PM
Subject: Re: Fellowship in Craniofacial Orthodontics
Craniofacial Orthodontic Fellowship
Institute of Reconstructive Plastic Surgery New York University Medical Center
Applications are now being accepted for the 2003-2004 Fellowship in Craniofacial Orthodontics (June 15th 2003 - July 1, 2004).
Program Description: This fellowship program provides advanced training in the treatment of patients with cleft lip and palate and other craniofacial anomalies. The Fellow will have a broad clinical experience in the pre and post surgical orthodontic management of patients undergoing craniofacial and orthognathic surgery. . This Fellowship will provide the recent orthodontic graduate with an alternative to the conventional practice of Orthodontics.
The training will include the following subspecialty practice experiences:
1. Presurgical orthopedics for infants born with cleft lip and palate.
2. Orthodontic management of patients with cleft or craniofacial anomalies from the deciduous through adult dentition.
3. Surgical/orthodontic treatment planning, pre and post surgical orthodontic management, surgical splint design and construction, and insertion of surgical fixation splints in the operating room.
4. 3D Computer based surgical planning
The Fellow will have the opportunity to express their interest in the design and execution of clinical research within the time constraints of a 12-month program. Institute faculty will provide mentorship and guidance in this clinical research endeavor.
The Fellow will participate in weekly meetings of the Cleft and Craniofacial Teams in preparation to serve as an orthodontic clinical consultant to other University or Hospital based Teams. This Fellowship training will provide the clinical skills needed for the diagnostic planning and orthodontic treatment of our most complex and challenging patients.
Requirements for application: The applicant must be a graduate of a dental school accredited by the American Dental Association and be qualified to take the National Dental Boards, parts I and II. The applicant must have graduated an orthodontic training program, accredited by the American Association of Orthodontics Application Process: Please contact Dr. Barry H. Grayson, Director of Craniofacial Fellowship Training Program Tel. 212 263 5206 or Fax 212 263 5400
Barry H. Grayson DDS
Associate Professor of Clinical Surgery (Orthodontics) New York University Medical Center Institute of Reconstructive Plastic Surgery 560 First Ave.
New York, New York
Phone: 212 263 5206
Fax: 212 263 6002
From: PAUL JOHNSON [p8johnson@YAHOO.COM]
Sent: Fri 3/14/2003 12:58 PM
Subject: Re: Sassouni
Dear Dr. Yaccino,
You are correct: the next ESCO Digest is supposed to carry this correction.
> "Michael D. Yaccino, III. DMD" <firstname.lastname@example.org> wrote:
> Point "O" is really in the center of the triangle just below the point where aall the linews meet. If you extend the lines coming in from the right they will diverge slightly and then converge more. MIke
From: Peter De Wilde [wezo@VILLAGE.UUNET.BE]
Sent: Tue 3/11/2003 6:31 PM
Subject: Nikon Coolpix 5000
If you want to buy a fine compact clinical camera,the new Nikon 5700 is a much better option then the Nikon 5000. Due to its greater optical power (zooms to 120 mm/35mm equivalent) one can keep larger camera-object distances, which on turn allow well balanced work of the built in flash (no overexposure, less shadows) and better illumination of the object field by back up light (eg. operation lamp) for faster focussing.
You should use the "bracketing" tool (automatic exposure compensation with the option +/- 0,7) to obtain perfectly exposed frames.
Problem with ring lights:
1/ You don't really need them with a Nikon compact digital camera.
2/ They're expensive.
3/ They're another thing that feed on batteries.
4/ They're extremely bulky. Being even more voluminous and
unbalanced heavy in regard to your CP 5000 camera itself, they make
one handed operation very difficult, even impossible.
5/ The body of the flash blocks out the flash sensor, which is not
located behind the lens (NO "TTL"), but on the right side of the flash bulb. None of all Nikon compact digital camera system is able to connect with any type of ring flash (Astonishing for a company which has always been a standard in medical photography.), except when you use a fiber optic light tube that guides the reflected flash light directly to the flash sensor. This item is not provided by Nikon, neither did I test it myself, so I don't know if this thing really works. Is there anybody in our forum who already gained experience with it?
When you consider to purchase a clinical camera system you must decide on choosing for ease and (relative) economy (so no ring flash) , or for the perfection of the good old conventional SLR-system. When you adapt to the latter you should invest in a semi-professional digital reflex camera body, interchangeable macrolens, ringflash, IBM microdrive, etc... in conjunction with computer hardware that allows you to save (in an original AND at least one back up file) 5 MB per picture taken.
Peter De Wilde,
From: Ruben Colon [rcolonb@PRTC.NET]
Sent: Tue 3/11/2003 8:02 PM
Subject: Nikon CoolPix 5000
There is some information about macro ring flashes for Nikon CoolPix 5000 (and also for the new Nikon CoolPix 5700) at DADS Photography (no financial interest): http://www.dadsphotography.com http://www.dadsphotography.com/coolpix5000.html and http://www.dadsphotography.com/coolpix5700.html
From: duane erickson [dericksn@COMCAST.NET]
Sent: Tue 3/11/2003 8:14 PM
Subject: Fasomax effects on tooth movement
We are treating increasing numbers of older women patients. Has anyone seen research or infomation regarding how Fosamax and/or other drugs used to treat osteoporosis affect the physiology of tooth movement. A colleague and I were discussing this; he had found the PDR and package uninformative about this issue.
Duane Erickson, DDS
Silver Spring, MD
From: rajesh patil [dr_rajesh_patil@HOTMAIL.COM]
Sent: Sat 3/15/2003 12:11 PM
Subject: sunday bite
i just wanted to know the origin of the terminology `sunday bite ' which is used to describe dual bites in Class II div 1 malocclusions. Dr Rajesh Patil India