Office Hours
Monday: 8:00 AM - 5:00 PM
Tuesday: 1:00 PM - 6:00 PM
Wednesday: 8:00 AM - 5:00 PM
Thursday: 2:00 PM - 7:00 PM

Office Phone: (740) 363-0886

163 North Sandusky Street
Lower Level (L-100)
Delaware, OH 43015


Treatment Options


Early Treatment

(Age 7 - Age 10)

Phase I Treatment

(Skeletal Correction and Growth Monitoring)

All children between the ages of 7 and 8 should have an initial orthodontic consultation, according to the American Association of Orthodontists! 

Phase I treatment (early interceptive treatment) is orthodontic treatment that is done during the mixed dentition period when children begin to lose their baby teeth. This is the best time to detect whether there are disturbances in jaw growth or tooth development.  A short phase of orthodontic treatment can be utilized at this time to favorably enhance jaw growth.  Treatment may also be undertaken to create space and to guide eruption of permanent teeth into proper alignment.  This phase of treatment typically lasts from 9 to 12 months, however, treatment is individualized to the needs of each child.

Avant-Garde Orthodontics provides complementary initial evaluations and consultations for all children.  We would love to see your child’s smile grow at Avant-Garde Orthodontics!


Teenage Treatment

(Age 11 - Age 17)


Comprehensive Treatment or

Phase II Treatment


At Avant-Garde Orthodontics we especially love to create beautiful smiles for teenagers between the ages of 11 and 17!

Comprehensive orthodontic treatment refers to the traditional course of treatment that many people go through once all of their permanent teeth have erupted.  Individuals who have had Phase I treatment (sometimes called Early Treatment) usually begin Phase II treatment during their early adolescent years.


During comprehensive treatment (Phase II treatment), teeth are aligned for maximum esthetics, function and stability with a combination of braces, specialized retainers, and/or expansion appliances as needed.  Missing teeth may be replaced during this stage, and teeth that are out of position, or fail to erupt, may be brought into the dental arch through forced eruption or removal.

Our door is always open for a complimentary initial consultation.  Your smile begins at Avant-Garde Orthodontics!


Adult Treatment

(Age 18 - Up)

Comprehensive Treatment

At Avant-Garde Orthodontics, we believe that you are never too old to have a beautiful smile! 

Missing teeth may be replaced during this stage, and teeth that are out of position or fail to erupt may be brought into the dental arch through forced eruption or removal.  We thrive on creating beautiful smiles and our door is always open for a complimentary initial consultation.  Let us help you at Avant-Garde Orthodontics! 


Interdisciplinary /

Surgical Orthodontics

Complex Case Treatment That Requires Multiple Disciplines

At Avant-Garde Orthodontics, we believe that everyone deserves to have a beautiful smile, even if the  circumstances are unusually challenging.

Interdisciplinary orthodontic treatment involves a group of professionals from various disciplines who work as a team to provide the best esthetic and functional outcome.  At Avant-Garde Orthodontics, we work closely with many other professionals, including physicians, general dentists, oral surgeons, periodontists, endodontists, and prosthodontists.  We find these cases among the most challenging and rewarding, as we are especially skillful in managing them.  

Our ultimate goal is to provide you with the attractive and healthy smile that you want and deserve.  Our door is always open for a complimentary initial evaluation and consultation.  Let us help you at Avant-Garde Orthodontics! 


Meet Your Doctors

Dr. Dahye Joo, D.M.D., M.S.D.

Dr. Joo graduated with honors from Case Western Reserve University School of Dentistry with a Doctorate in Dental Medicine.  To specialize in orthodontics, she completed her residency at Case Western and received both her Master of Science degree and her Board Certification in Orthodontics.  Dr. Joo is the recipient of many academic awards and honors, including induction into the highly esteemed Omicron Kappa Upsilon Dental Society.

Dr. Joo is a positive dreamer who believes in building lasting interpersonal relationships, creating beauty through her craft, and growing every day.   In her free time, she enjoys the violin, CrossFit, painting, and cooking.  Her big smile, genuine heart, and get-it-done attitude will make you feel welcomed the second you step in the door!  For Dr. Joo, the best part of practicing orthodontics is meeting new people.  She finds great joy in learning about her patients and hearing their stories.  She can't wait to meet YOU and share some laughs while creating your beautiful smile! 

Fun fact about Dr. Joo: She once met and talked with famous chef, Anthony Bourdain!

Dr. Craig A. Hardy, D.D.S., M.S.D.

Dr. Hardy earned his Doctor of Dental Surgery degree (DDS) at Ohio State University in 1979.  He practiced general dentistry for two years before entering a hospital-based residency training program in pediatric dentistry at the Children's Hospital of Pittsburgh.  Dr. Hardy is a Board-Certified specialist in Pediatric Dentistry and practiced it exclusively for 10 years before returning to Ohio State to earn a master’s degree and undergo formal training in orthodontics.

Dr. Hardy is a Diplomate of the American Board of Pediatric Dentistry and a Lifetime Fellow in the American Academy of Pediatric Dentistry. He is a member of the Ohio Dental Association, the Ohio Association of Orthodontists, the American Association of Orthodontists, and the American Dental Association.  Dr Hardy is a past-president of the Ohio State University Orthodontic Alumni Association.

Dr. Hardy served for six years (active and reserve duty) in the Unites States Marine Corps.  He saw combat in Viet Nam and proudly wears the Viet Nam service ribbon with combat star.  Dr. Hardy worked in radio and television broadcasting for many years, both as on-air talent and as a technician. He worked in radio stations in Alliance, Elyria, Cleveland, and Berea, OH. He also worked in television in Cleveland at WJW-TV (now WJKW-TV) and in radio and television at the Far East Radio and Television Network on Okinawa.  He enjoys automotive repair, computer technology and trading stock options and equities. 

Dr. Hardy enjoys all sports.  His favorite teams include OSU football, the Patriots, the Bulls, and the Pirates. He especially enjoys attending the state high school basketball tournament games at the Schottenstein Center.

Fun fact about Dr. Hardy:  He once met and talked with Richard Nixon!


New Patient Forms

New Patient Form

(Please click the button to fill out electronically)

Pease fill out and submit the form before your initial consultation. 

Thank you!


Contact Us

Office Phone  (740) 363-0886

Fax (740) 363-7671

163 North Sandusky Street

Lower Level (L-100)

Delaware, OH 43015


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