Andrew J. Haas, D.D.S., M.S.
Cuyahoga Falls, Ohio 44223
Practice limited to Orthodontics


D.D.S. Degree: Loyola University 1953
M. S. Degree: University of Illinois 1957

For more than forty years has held a continuous professorship at Ohio State University,
University of Illinois, Loyola University
Presently is Professor of Orthodontics at University of Illinois
Member of Continuing Education Faculty of Temple University and the University of Illinois
The Temple course represents the longest uninterrupted Continuing Education Course in Medicine and Dentistry in the United States, twenty-nine years
Has received outstanding teaching awards from students at these institutions on many occasions
Past President Cleveland Society of Orthodontists, 1970
Past President Akron Dental Society, 1979
Past President University of Illinois Orthodontic Alumni Association, 1984-1988


Annual visiting Lecturer to the U. S. Army's two orthodontic teaching facilities, Fort Meade, Maryland and Fort Knox, Kentucky.

In 1968 was the keynote speaker at the inaugural meeting of the Mexican Society of Orthodontists and again in 1993 at the 25th anniversary of that Society.

In 1987 delivered the Spencer R. Atkinson Memorial Lecture

In 1988 delivered the Thomas Zwimmer Lecture Medical College of Georgia

Diplomat of the American Board of Orthodontics
Member of the Great Lakes Society of Orthodontists
President of the Edward H. Angle Society of Orthodontist 1993-1994
Was awarded the Distinguished Alumnus Award for 1968 by Loyola University, Chicago, Illinois

In 1992 was the fifth recipient since 1929 of the University of Illinois Orthodontic Alumni Association Distinguished Alumnus Award

May 1988 received the Joseph E. Johnson Award from the American Association of
Orthodontists for presenting the Most Outstanding Clinic at their National Meeting.

1961 Publication Reintroduced the Palate Expansion Technique into this Country
1970 Publication Introduced Dentofacial-Orthopedics into Orthodontic Therapy

Introduced the application of heavy cervical gear forces to produce dramatic facial changes in skeletal Class II cases.

Introduced the concept of "reverse headgear" with the introduction of the protraction chin cup.

Introduced vertical skeletal reduction by application of the vertical pull chin cup.
Discovered the application of the face-bow appliance to effect slow palatal expansion most recently published in the German Scientific Literature (1991 Publication)

Author of articles regarding in particular the subjects of Rapid Palatal Expansion, Dentofacial -Orthopedics, Biologic Treatment, Orthognathic Surgery Retention and Stability and Surgical-Orthodontics

Recent articles published:

Tandem Technique: A treatment for all three Dememsions. World Journal of Orthodontics, 2003 Vol 4, Pgs 109-118

Headgear Therapy: The Most Efficient Way to Distalize Molars Seminars in Orthodontics, June 2000 Vol 6, No 2 Pgs 79-90

An update on Advanced Rapid Palatal Expansion For the Orthopedist The Journal of the Southeastern Society of Pediatric Dentistry, 1999 Vol. 5, No. 3 Pgs. 10-12

A retrospective Study of Angle ClI Maloclusions treated orthodontically without extraction using two palatal expansion methods
American Journal of Orthodontics, 1999; 116:101-107

Retention and Long-Term Stability 8th International Conference for Orthodontists
Retention and Long-Term Stability, 1993 Pgs. 95-110

"Surgical-Orthodontic Correction of Transverse Maxillary
Deficiency", October 1989, Clinics in Plastic Surgery and April 1990, Dental Clinics of North America

*Has delivered more than 450 courses and papers in the United States, Canada (5),
Mexico (10), Germany (4), Austria (5), Spain (2), England, Denmark, France, Israel (2), Brazil (4), Columbia and Venezuela

*Has provided case records to over 40 students worldwide doing research projects in
Orthodontics. Most of these studies have been published

Has given courses two or more times at many universities. Among them:

Harvard University
University of Michigan
University of Southern California
University of Texas
Tufts University
Baylor University
Ohio State University
Alabama University
Loma Linda University
University of Iowa
University of Missouri
University of Nebraska
University of the Pacific
University of Pittsburgh
University of Indiana
University of Illinois
University of Pennsylvania
Northwestern University
Temple University
Loyola University
Case Western Reserve
Detroit University
Eastman Dental Center
University of Manatoba
St Louis University
University of Tennessee
University of Toronto
Medical College of Georgia

Most Recent Significant Scientific Presentations:

May 3-7, 2002 Presented paper and participated in panel at the American Assoc. of Orthodontists meeting in Philadelphia, Pa.

Nov. 22-23, 2001 Presented a two day course in Bauru, Brazil 600 attendees.

Nov. 24-25, 2001 Presented a two day course in Florianopolis, Brazil. 300 attendees

Nov. 26, 2001 Presented a one day course for faculity and students of the three Orthodontic graduate programs in Rio De Jeniro

May 3, 2000 Presented a paper and table clinic at the meeting of the American Association of Orthodontists in Chicago, IL

April 27, 2000 University of Illinois presented a paper at reunion meeting.

January 17, 2000 Presented a paper and panel discussion before the Edward H. Angle Society of Orthodontists in St Thomas, Virgin Islands

December 10, 1999 Presented a paper at the Northeastern Society of Orthodontists in Boston, Ma

May 14-19, 1999 Read a paper and gave a table clinic at the Annual Meeting of the American Association of Orthodontics in San Diego, Ca

February 6-10, 1999 Read a paper before the Edward H Angle Society of Orthodontics in Naples, Fl

February 2-3, 1999 Gave a two day seminar to the Annual Orthodontic Research Seminar in Mexico City

November 20-21, 1998 Presented a two day course at the University of Indiana, Indianapolis

May 17-20, 1998 Presented a table clinic at the American Association of Orthodontists in Dallas, Texas

February 8-11, 1998 Presented a paper to the Mid West Component of the Edward H. Angle Society of Orthodontics in Milwaukee, Wisconsin

October 29, 1997 Presented a table clinic at the annual Conference of the Great Lakes Association Of Orthodontists in Phoenix, Arizona

May 3-8, 1997 Presented a table clinic at the American Association of Orthodontists in Philadelphia, Pa.

February 8-13, 1997 Presented a paper at the Angle Orthodontic Society

November 14-16, 1996 Presented a two day course at the University of Tel-Aviv, Israel

November 8-9, 1996 Presented a two day course at the University of Indiana, Indianapolis

October 1996 Presented a course at the IX International September 25-26, 1996 Presented a paper and cases at the University of Illinois Orthodontist Alumni Meeting

June 8, 1996 Presented a one day course at the University of Michigan Alumni Association in Ann Arbor, Michigan Association of Orthodontists

May 30-31, 1996 Gave a two day course at the Medical College of Georgia

May 13, 1996 Gave a table clinic to the American Association of Orthodontists in Denver, Co.

May 11, 1996 Gave a four hour clinic at the annual meeting of the American Association of Orthodontics Georgia

January 20-24, 1996 Presented a paper to the Mid West Component of the Edward H. Angle Society of Orthodontics in Chicago, Illinois

May 17-18, 1995 Presented a two day course for the Central Jersey Society of Orthodontists

February 3, 1995 Presented a half day course for the Ohio Association of Pediatrics Dentists in Columbus, Ohio

November 18-19, 1994 Presented a two day course at the University of Indiana

August 4-6, 1994 Presented a three day course to the Association De Estomatologia De La at Mexico City, Mexico

May 23-24, 1994 Presented a two day course at Ft. Meade, Maryland

May 12-13, 1994 Presented a two day course at Ft. Knox, Kentucky

May 1-2, 1994 Presented a course to the American Assoc. of Orthodontics at Orlando, Florida

March 1994 Presented a one day course at Baylor University

February 23- March 1,1994 Presented a paper at the Meeting of the tri State Medical Dental Assoc. Big Sky, Montana

July 1993 Presented a course to the College of Diplomats of the American Board of Orthodontics at Beaver Creek, Colorado

May 1993 Presented a two day course at Temple University

April 22-23, 1993 Presented a two day course at Fort Meade, Maryland

April 3-4, 1993 Presented a two day course for the Mexican Society of Orthodontists, Mexico City

March 19, 1993 Presented a one day course at Baylor University

January 24-29, 1993 Presented a Scientific Paper in Puerto Rico

December 4-5, 1992 Presented a two day course at the University of Indiana

Original Contribution to the Art and Science of Orthodontics

1. Took as occasional clinical accident or curiosity and developed the rapid palatal expansion technique. Introduced same in the 1961 publication. The RPE technique has become the most significant and most utilized orthopedic technique in orthodontic history.

2. Was the first to use and report on the application of heavy cervical gear force to orthopedically correct the skeletal Class II. (1970 publication)

3. Introduced the orthopedic crib to unitize the maxilla to facilitate the use of orthopedic force in the mixed and transitional dentition. (1970 publication)

4. First to use the expanded Kloehn cervical face bow appliance for slow palatal expansion.

5. First to call attention to fact of apical base expansion being the most important objective attainable in orthopedic orthodontic treatment.

6. First to distinguish the dramatic and important differences between maxillary apical base expansion (very stable) via slow or rapid palatal expansion and mere dental arch expansion. (very unstable)

7. First, to introduce, describe and utilize the concept of enlarging the apical base in the A-P by influencing buccal segments posteriorly into maxillary and mandibular growth cites via the cervical gear appliance to one arch and elastics from the opposite arch worn to the cervical gear e.g. the tandem mechanics.

8. Introduced the concept of protracting the maxilla after disrupting it's hafting articulations with RPE. The appliance, introduced in the 1970 publication, to accomplish this objective is the protraction chin cup.

9. Extended the use if the protraction chin cup to protract recessive dentures or to prevent them from becoming recessive as in closing large spaces due to missing teeth.

10. First to use the vertical pull chin cup to control vertical skeletal anomalies by; 1. preventing buccal tooth eruption, 2. introducing buccal teeth, 3. reducing buccal alveolar bone height, 4. moving the maxilla upward and forward, 5. changing mandibular morphology. All these happenings of course result in positive mandibular rotation and decrease in anterior facial height.

11. Was the first to demonstrate a method by which skeletal vertical could be increased in the hypodivergent facial type by torquing and protracting the maxilla following it's mobilization with RPE.

12. The 1970 publication was the first in orthodontic history to demonstrate dramatic and stable skeletal changes in all three dimensions; 1. increase of apical base in the transverse deficiency case 2. increase and decrease of skeletal vertical, 3. retraction and protraction of the maxilla.

13. The 1980 publication demonstrates a stability of treatment never before recorded in orthodontic history. The key to this stability was maxillary apical base enlargement.

14. One of the first if not the first to point out and to demonstrate mechanics to intrude or prevent incisor eruption to correct deep anterior overbite. Certainly the first to prove that such correction is remarkably stable vs. the instability so often recorded in cases treated by elongation of buckle teeth.

15. In the German publication 1992 demonstrated a splint that is highly effective in eliminating clenching and bruxing (in my opinion kenetic clenching) by utilizing the concept that the proprioceptive-reflexive system which protects our lower incisors from occusal trauma can be utilized by transferring the entire clenching pressure to one lower incisor tooth, thus causing the protective mechanism to relax the muscles of mastication.

16. Introduced the six keys to orthodontic-orthopedic stability in 1980.


I. Make the treatment fit to the patient's needs and beware of the pitfall of making a patient fit a treatment based on factors other than biology.

II. Employ a system of diagnosis which identifies all skeletal and dental anomalies.

III. Utilize growth as much as possible, where applicable, in treatment planning and in the non-grower simulate a growth oriented treatment plan.

IV. The treatment plan must incorporate a specific remedial measure for every identified anomaly both skeletal and dental.

V. In virtually every case plan to extend to your patients the most important orthodontic-orthopedic benefit available to them namely to promote apical base development to full potential.

VI. Do not squander the efforts of treatment with anything less than a well planned and long retention.


Other publication of significance:

"Surgical Orthodontic Correction of Transverse Maxillary Deficiency: A Simplified Approach:,
Plastic and Reconstructive Surgery."
Journal of Pediatric Denistry, January 1984

Rapid Expansion of the Maxillary Dental Arch and Nasal Cavity by Opening the Midpalatal Suture
The Angle Orthodontist, April, 1961 - Vol. XXXI, No. 2
Pages 73 thru 90

The Treatment of Maxillary Deficiency By Opening the Midpalatal Suture
The Angle Orthodontist, July 1965 - Vol. XXXV, No. 3
Pages 200 thru 217

Palatal Expansion: Just the Beginning of Dentofacial Orthopedics
American Journal of Orthodontics, March 1970 - Vol. 57, No. 3
Pages 219 thru 255

JCO/Interviews: Dr. Andrew J. Haas
Reference: Journal of Clinical Orthodontics, 1973
Twenty pages

Let's Take a Rational Look at Myofunctional Therapy
CDS Review (Chicago Dental Society), Vol. 68, No. 8
Pages 24 thru 27

Rapid Palatal Expansion: A Recommended Prerequisite to Class III Treatment
Transactions of the European Orthodontic Congress, London 1973
Pages 311-318

Long-Term Post Treatment Evaluation of Rapid Palatal Expansion
The Angle Orthodontist, July 1980 - Vol. 50, No. 3
Pages 189-217

A Biological Approach to Diagnosis, Mechanics and Treatment of Vertical Dysplasia
The Angle Orthodontist, October 1980 - Vol. 50, No. 4
Pages 279-300

The Combined Surgical and Orthodontic Treatment of Mandibular Prognathism
Annals of Plastic Surgery, Vol. 7, No. 6, December, 1981
Pages 458 thru 463

Surgical-Orthodontic Correction of Transverse Maxillary Deficiency
Clinics in Plastic Surgery, Vol. 16, No. 4, October, 1989
Pages 749 thru 755. Clinics in Plastic Surgery and April 1990, Dental Clinics of North America

Headgear Therapy: The Most Efficient Way To Distalize Molars
Seminars in Orthodontics, Vol. 6, No. 2 (June), 2000: Pages 79-90



Click here to return to Dr. Haas' Profile.