Case Presentation: Implant Crown

The advent of dental implants has made many procedures more predictable with better cosmetic results. Today's patients is a great example of the power of modern implants. They came to us missing two mandibular incisors and enough open space for one replacement tooth. Unlike the maxillary (upper) teeth, asymmetric midlines are much less noticeable on the lower arch. Using previous dental technologies, replacing this tooth would have required modifying the two adjacent teeth and creating a dental bridge. Preparing mandibular incisors for bridges is problematic, as the teeth are already so small that any reduction in size makes them very fragile. Additionally, bridges are harder to maintain than individual teeth and create food/plaque traps. 

For this patient, a single dental implant and crown created a perfect cosmetic solution to their missing incisor. They were fortunate to have enough bone level in that area to support the titanium anchor. Many times the bone around the mandibular incisors is too thin, requiring grafting or negating the possibility of an implant all together. This is why a proper consultation, exam and treatment plan is crucial in preparing for an implant procedure. If you would like to know more about dental implants, how we use them and who might be a good candidate, please give our office a call!

Dental Questions: What do I do if my implant crown comes loose?

Do you have a dental implant? Have you ever noticed that the crown feels loose or that you can move it with your tongue? This sensation can be quite alarming and seems as though the entire implant is wiggling out. However, looseness is usually the result of the implant crown coming separated from the actual implant. 

Although there are a few different implant designs, they all include two pieces of metal screwed together. Over time, the forces of biting and chewing can cause these screws to work themselves loose. This is typically a issue on older implant designs, but can affect any generation.

Your best bet in solving this problem is returning to the dentist who placed the implant, or obtaining a record of what type of implant they used. This information is crucial in tightening the crown back down. Tools, hardware and design are not the same between companies and using incompatible components could ruin the implant.

After identifying the type of implant used, the treating dentist will evaluate wether or not the crown can be saved. Dental Implants are comprised of three components: the actual implant, an abutment, and an overlying crown. The abutment is essentially a metal post that the crown is screwed or cemented to. Depending on which part of the implant has failed, the entire crown may need to be removed to tighten everything back up. However, most crowns are savable and only need to be repaired or recemented once the procedure is over. If you would like to know more about implants or their maintenance, feel free to give us a call! 

Dental Questions: Can Any Tooth Be Replaced With An Implant?

Here, you can visualize how important bone space is in placing an implant. 

In theory, an implant could take the place of any tooth position in the mouth under ideal conditions. However, not every tooth will be a good candidate for replacement with an implant. The main limiting factors are space, bone size and bone health. For an implant to function properly, there needs to be enough distance between the adjacent teeth so that it can be placed without damaging the roots (which would necessitate both the implant and the tooth to be removed). Additionally, there needs to be ample bone height for the implant to sit in and integrate. This becomes a particular problem on the upper jaw, where the maxillary sinuses can encroach on potential bone space. Finally, the bone needs to be completely healthy. Patients with bone density disorders, recent infection or a history of taking certain medications may not be eligible for an implant. 

While we can accommodate a number of conditions with special implant shapes and grafting, there are some instances where placing an implant would be unpredictable or dangerous. In any case, a proper examination (with x-rays) is the only way to determine if you are eligible for a dental implant. If you would like to know more about implants, when we can place them and if you are eligible, please call our office!

Dental Implants Thousand Oaks

Lost teeth can be replaced by a number of different dental treatments, including implants, removable dentures, and bridges.  Implants are the most technologically advanced treatment option and act the most like natural teeth.  Dental implants are bio-compatible titanium alloy cylinders that act as a root replacement for a missing tooth.   In their current form, dental implants have been around since the late 1970s when a Swedish orthopedist named Dr. Branemark developed them for dentistry. 

Today dental implants are the preferred course of treatment for replacing a single missing tooth.  They are similar in cost to doing a bridge and far more comfortable than wearing a removable appliance such as a partial denture.  In addition, unlike a bridge, dental implants do not require disturbing the tooth structure of surrounding teeth. 

According to the Academy of Osseointegration website, the long term success rate of implants remaining stabile in the bone is 90%.  A study published in Clinical Oral Implants Research (July 2010) showed a 16 year survival rate of 83%.  In either case, implants have an amazing long term success rate, that makes them a predictable option to replace a missing tooth. 

Implants have become a billion dollar industry.  Two of the leading implant manufacturers, Nobel Biocare and Straumann each reported yearly revenue in 2013 and 2012 respectively of over 780 million US dollars.  In my office I have been placing dental implants since 2007.  I have chosen to place Straumann implants, because they are an industry leading company that has been developing implants in Switzerland since 1974.  They produce a high quality and consistent product, including the implant and all of the parts that connect to the implant that allow us to restore the implant with a prosthetic tooth. 

As a general dentist, I enjoy placing implants in my office because I know where the ideal placement is so that I can restore the implant with an ideally fitting and functioning crown.  The actual surgery of placing the implant isn’t much different than drilling an ideal hole in a tooth to fix a cavity.  Implants are placed by surgically making a small incision in the tissue, followed by drilling a hole similar in size to the implant, and then using a torque wrench to screw the implant in place.  The entire procedure is done with local anesthesia in under an hour.  Patients have told me that having an implant placed is less traumatic than having a tooth removed, and the recovery isn’t much different than having a filling placed. 

After a tooth is lost, it is ideal to wait four months for the bone to heal before placing the implant.  It takes an additional four months once an implant is placed for it to osseointegrate in the bone and for the permanent crown to be placed.  So from the initial tooth loss it takes eight months for the procedure to be completed.

In restoring the implant, there are a couple of steps.  We take an impression of the location of the implant.  Then my lab fabricates a custom abutment, which replicates the missing part of the tooth that sticks above the gum tissue.  These abutments are made of either a high noble metal, titanium or zirconia and they are screwed onto the implant.  Finally a traditional crown is made to attach to the abutment.

Patients frequently ask about the cost and timeline for dental implants.  To restore a single missing tooth with a dental implant, abutment, and crown, the cost is approximately $3500.  Implants are most predictable in their long term success when they are given the proper amount of time for the bone to integrate and heal to the implant.  When advertisements are made for implants that cost less or take less time, it generally involves using less quality implants and connecting parts.  I believe in using industry leading parts, custom abutments, and quality local labs to complete all of my implant cases.

Kari Ann Hong, DDS
1000 Newbury Rd. #190
Thousand Oaks, CA 91320
www.thousandoaksfamilydentistry.com