Some children develop too few teeth (missing or congenitally absent teeth), some develop too many (extra or supernumerary teeth), and some have teeth that are simply slow to arrive. A pediatric dentist diagnoses which is happening using an exam and X-rays, monitors development over time, and coordinates any specialist care needed. Early evaluation protects your child’s bite and smile.
If your child seems to be missing a tooth, has an extra tooth, or has a gap where an adult tooth has not appeared, it is natural to wonder what it means. These developmental differences are more common than most parents realize, and the great majority are very manageable when caught early. At Smile Arc Pediatric Dentistry in San Diego, we diagnose missing, extra, and late-arriving teeth, monitor how your child’s mouth is developing, and act as the steady guide who coordinates any additional care your child may need over the years ahead.
Three Different Situations Parents Notice
“Missing or extra teeth” actually covers three distinct situations, and telling them apart is the first step:
- Missing teeth (hypodontia): one or more permanent teeth never formed. The most commonly absent teeth are the upper lateral incisors and the second premolars (bicuspids), and this can run in families.
- Extra teeth (hyperdontia): an additional tooth has formed beyond the normal count. A common example is a mesiodens, an extra tooth near the front of the upper jaw.
- Delayed eruption: the tooth exists but is simply taking longer than expected to come in, sometimes because it is impacted or blocked.
Only a dental exam with X-rays can tell which of these is happening, which is why an evaluation matters before assuming anything.
Missing Permanent Teeth
When a permanent tooth never develops, it is usually discovered on a routine X-ray rather than because of any symptom. Sometimes the first clue is a baby tooth that simply never gets loose, because there is no adult tooth beneath it pushing it out. Being born without one or more teeth is more common than many families expect and often runs in families.
The good news is that there are several paths forward, and there is usually no rush. Identifying a missing tooth early simply lets us plan thoughtfully and choose the most conservative option at the right time.
Extra Teeth
Extra, or supernumerary, teeth can sometimes cause no trouble at all, but they are worth watching closely. An extra tooth can block a normal tooth from erupting, crowd neighboring teeth, or push them out of position. A mesiodens, for example, can prevent the upper front teeth from coming in properly. When an extra tooth is likely to cause problems, we plan for its removal at the right time, often coordinating with an oral surgeon, and we monitor how the surrounding teeth respond.
How We Diagnose and Plan
Diagnosis begins with a comprehensive exam and dental X-rays, which let us see teeth that have not yet erupted and confirm exactly what is and is not there. From there, our role is to be the quarterback of your child’s care. We monitor your child’s bite and development at regular visits, keep track of which baby teeth are holding strong, plan ahead for the years to come, and bring in the right specialist at the right time when one is needed. Because we follow your child over many years, we can time decisions to your child’s growth rather than rushing them.
Treatment Options
There is no one-size-fits-all answer. Depending on your child’s bite, spacing, and development, options may include:
- Preserving the baby tooth: when a permanent tooth is missing, a healthy baby tooth can often remain in place and functional for many years, which is frequently the most conservative choice in childhood.
- Closing the space orthodontically: in some cases, an orthodontist can move teeth to close a gap, especially when crowding already exists. This is treatment we coordinate with an orthodontic specialist, not something we perform in our office.
- Replacing the tooth later: when replacement is the best long-term plan, a dental implant or bridge may be considered. Implant placement is typically delayed until jaw growth is complete, usually in late adolescence or adulthood, and is performed by an oral surgeon or prosthodontist. We help plan and time this so your child is ready when the time comes.
Our job is to recommend the option that is healthiest and least invasive for your individual child, and to make sure the timing is right.
When Should You Schedule an Evaluation?
If a baby tooth has fallen out and nothing has replaced it after several months, if a tooth has not erupted on a typical schedule, or if you have noticed an extra tooth, it is worth having it checked. There is rarely an emergency, but early assessment opens the door to simpler, more conservative planning. Many missing or extra teeth are identified between ages 6 and 9 on routine X-rays, which is one more reason regular checkups matter.
Schedule a Developmental Evaluation in San Diego
If you suspect your child is missing a tooth, has an extra tooth, or has a tooth that is late to arrive, early guidance gives your child the best options. Call (858) 277-8086 or request an appointment online today.
Conveniently located in the 4S Ranch and Rancho Bernardo area, proudly serving San Diego, Del Sur, Carmel Mountain Ranch, Poway, and Rancho Penasquitos.
Reviewed by Dr. Nikki Shafiei, board-certified pediatric dentist and Diplomate of the American Board of Pediatric Dentistry.
Frequently Asked Questions
Can a missing permanent tooth grow in later, or is it gone for good?
If a permanent tooth never formed (confirmed on an X-ray), it will not grow in later. However, a tooth that is simply delayed or impacted does still exist and may erupt on its own or with help. An X-ray is the only way to tell the difference, which is why imaging is part of the evaluation.
At what age can you tell if a permanent tooth is missing?
In many cases, missing permanent teeth can be identified between ages 6 and 9 using routine dental X-rays. Early detection lets us plan ahead and guide healthy development before any problems arise.
What happens if we just leave the baby tooth in place?
Sometimes that is exactly the right plan. A healthy baby tooth with good root support can stay functional for years and serves as a natural space holder. We monitor it closely, because if it eventually weakens, loosens, or develops decay, we will plan the next step together at that time.
Will my child need an implant?
Not always. Treatment depends entirely on your child’s bite and development. If a future implant becomes part of the plan, we coordinate with the appropriate specialist. For implants in adulthood, an oral surgeon or prosthodontist performs the placement. As a pediatric practice, we focus on diagnosis, monitoring, and guiding the timing.
What problems can extra teeth cause?
Extra teeth can block normal teeth from erupting, create crowding, or shift neighboring teeth out of position. Some cause no symptoms at all. Because the effects are not always visible, we monitor extra teeth carefully and recommend removal only when it will protect your child’s developing smile.
