Dr. Josh

Dr. Josh Twiss and his wife Marianne live in Alamo with their two young girls Harper and Finley. Since they were first married, the Twiss family has dreamed of returning to Danville to open a practice and raise their kids near grandparents, aunts, uncles, and 9 cousins. Before opening Iron Horse Pediatric Dentistry in Danville, Josh spent three years at one of the most successful and demanding pediatric dental offices on the West Coast.


Dr. Josh successfully completed dental school at the State University of New York at Buffalo in 2010 where he was awarded “most outstanding potential in pediatric dentistry”. Following dental school, Dr. Josh completed an additional year of training earning his Advanced Education in General Dentistry (AEGD) at the University of New Mexico. The program focused on dental surgery, dental emergencies, patients with special needs, and pediatrics. During his time in New Mexico, Dr. Josh decided Pediatric dentistry was his life’s mission and completed two additional years of pediatric dental training in New York at the Women and Children’s Hospital of Buffalo. Dr. Josh is Board Certified, the highest achievement within his specialty. It has been a dream come true opening a practice in Danville where Josh can serve the community.




Your child's first visit to the dentist is an important one and it is our goal to make every visit enjoyable and positive. We understand that every parent has worries about how his or her child will behave at the dentist. Your help in preparing your child for their first appointment is important. We suggest staying positive, we want your child to develop a favorable opinion of the dentist. Please do not share with your child any anxiety you may have about dentists. Try to avoid using words that may cause unnecessary fear such as "hurt", "pain", "shot", "needle:, "drill" or "pull"; we use age appropriate and non-threatening words to explain our equipment and procedures. Reassure your child that the friendly doctor and staff will explain everything to him or her and answer all questions.




The first visit to the office can be a challenging and new experience for many children, especially if they have had a negative experience in another dental office. Parents should not be surprised or embarrassed if their child cries, this is a normal and age appropriate coping skill. Dr Josh and his staff are skilled at connecting with and assessing the level of cooperation of your little ones. Parenting styles vary significantly and we will do our best to accommodate your preferences. With regular dental visits, your child's confidence and comfort grows; laying an important foundation for lifelong dental health. At Iron Horse Pediatric Dentistry, our doctors and staff are specially trained in child development and behavior management. Our goal is to build lasting relationships with our patients from infancy through college and instill in them the skills and desire to have a lifetime of good oral health and habits!



Please be aware that during the first appointment, treatment such as fillings or extractions will NOT be done. We use the first visit to get to know your child and gain his or her confidence in us, to assess your child’s dental needs, and to evaluate behavior to determine the best approach to take in any necessary treatments.  Parents are welcome to come to the treatment room with their child as silent observers. For the safety and privacy of all patients, other children who are not being treated should remain in the reception room with a supervising adult. Exceptions will be made for parents with infants.


We're so glad you're here!  You will experience a fun, farmhouse-themed office, where you and your children will feel at ease. Our office is environmentally friendly, and state-of-the-art. We have chosen to use the most up-to-date dental materials that are mercury free, BPA free, and latex free. The x-ray technology we utilize is the safest digital technology and the most precise.

Iron Horse Pediatric Dentistry is a state-of-the-art, open, inviting dental practice that specializes in children from birth to young adulthood and individuals with special needs of all ages. Come on in and see what we’re all about!



Your child’s first visit to the dentist can set the stage for a lifetime of good oral health. And as your baby grows, regular dental visits will be just as important as regular visits to the pediatrician. That's why it's crucial to find an East Bay practice that offers comprehensive baby, child, adolescent, and special-needs dentistry in a soothing, kid-friendly environment. You want your child to feel comfortable and secure when visiting the dentist, and Iron Horse Pediatric Dentistry can provide the perfect environment. We offer an array of services that will grow with your children through the years, and put them on the right path for a lifetime of good oral health.


No two children are alike, and we understand that certain patients require a specific approach. Dr. Josh is experienced with special needs dentistry, and treats these patients with the care and compassion they deserve.

















Dental Cleanings & Fluoride Treatments


Baby Exams


Digital X-rays


Dental Sealants


Restorative Care including

Crowns, Fillings,


Root Canals (baby teeth), and Extractions


Tooth-Colored Fillings and Crowns


Minimal Sedation with Nitrous Oxide

(“Laughing Gas”)


Oral Sedation and General Anesthesia

When Necessary


Space Maintainers (Spacers)


Sports Dentistry including Exams

& Athletic Mouthguards


Emergency and Dental Trauma Care


Limited Orthodontic Treatment





We encourage every parent to have a basic understanding of the most important topics related to their child’s oral health at each stage of development. Click the boxes to learn more about each stage.


Special Needs

Oral Hygiene

Diet & Nutrition

Sports Dentistry

Expecting Moms

Ages 15-18

Ages 0-3

Ages 4-5

Ages 6-10

Ages 11-14

If your child has suffered a blow to the head, has lost conscienceless, or any other life-threatening emergency, please call 911 or proceed to your nearest emergency room. If your child faces a dental emergency, call us immediately. We are always here to assist when your child’s dental health is at risk. Here are some tips on dealing with urgent dental situations:



Knocked out Teeth (Permanent)

If your child has a toothache, ask him or her what makes it hurt. If it hurts spontaneously or continuously, please make an appointment immediately. We don’t want your child to be in pain. If the pain was an isolated event, be sure there is no food debris caught between the teeth or in the gums. Give Motrin and make an appointment if any pain continues.


Facial Swelling

If you notice facial swelling or a swollen cheek, please call our office immediately. However, if facial swelling approaches the eye or is causing your child to have trouble breathing, this is a medical emergency and you need to call 911 or go to the nearest emergency room.


Broken Tooth/Filling Knocked out tooth

If your child knocks out a PERMANENT tooth, this is a dental emergency. Put the tooth in milk; not water. Call our office immediately. Try not to touch the root of the tooth. If this happens at school or a sporting event, look for an athletic trainer or a school nurse to see if they have Sav-A-Tooth Solution. This solution keeps the cells of the tooth living longer.


Knocked out Teeth (Baby)


If your child knocks out a baby tooth, we can’t put it back in the mouth. The priority is to not damage the developing permanent tooth underneath. Rinse your child's mouth and bite on a cold washcloth. Call our office to see if an appointment is needed. Find the tooth and get them excited about the tooth fairy! We hear the tooth fairy is extra generous with an unexpected tooth loss!


If your child breaks or chips a permanent tooth, try to find the pieces of the tooth, apply a cold compress to the area and call our office to make an appointment.

Cut Lip, Tongue or Cheek

If your child falls or has trauma to the lips gums or cheek, apply a cold compress to the sites that are bleeding. Inspect the mouth to see if any teeth are loose. Give Motrin (preferred) or Tylenol to reduce inflammation and pain. Call our office to see if an appointment is needed.


Loose Space Maintainer

Although rare, sometimes the cement that holds a space maintainer in place can fail. Usually this failure is related to consuming sticky candy or biting on something very hard that dislodges the the metal band. Regardless of the cause, as soon as space maintainer becomes loose it needs to be removed from the child’s mouth, cleaned, and recemented if possible. If the space maintainer comes completely out at home, try to save it as it is custom fit for your child’s tooth.







(925) 725-1232

822 Hartz Way • Suite 100  Danville, CA 94526

FAX: (925) 281-2704

We want to hear from you!  Schedule an appointment with us today or feel free to call or send us a message with any questions you have!

Located in a beautiful new office in Danville, California, we can’t wait to see you!  Find us quickly with our map below.

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DR. JOSH TWISS        |     PAYMENTS      |     HOURS     |     EMERGENCIES     |       

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