Dental Implants!
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Dental implant specialists
Let us guide you on your path to a lifelong healthy and beautiful smile. Modern restorative dentistry preserves and conserves your natural teeth. With whitening, porcelain veneers, natural-looking crowns and bridges, lifelike bonding and clear braces, we’ve changed dentistry from a dull gray or glinting gold experience to a reflection of nature’s own handiwork.Implant Restoration
For whatever reason tooth loss has occurred – ineffective dentistry, lack of prevention (fluoride, flossing, brushing), periodontal disease – modern dentistry can provide permanent tooth replacement with the use of implant technology. There are many different implant solutions depending on your existing condition. We can replace one tooth, a few teeth or all your teeth with implant dentistry. They will look and feel much more like natural teeth than dentures. Using Teeth in a Day and Teeth in an Hour technology, Roger Sohn's Method Implant Dentistry can reverse decades of problems in a few hours. Implants have literally given complete functionality back to our patients. We provide complete implant services right here in our in-office dental implant center. We can correct or re-do implants done elsewhere and offer second opinions.Sedation Dentistry
Never be afraid of the dentist again!. All of your most complex care can be completed in as little as a single visit. Even the most fearful patient can “snooze” through complicated dental care with complete comfort and relaxation.Cosmetic Dentures
If dentures are still your best option and you want the most life-like and natural result possible, then Roger Sohn Cosmetic Dentures are the answer. Using European teeth designed in CA, Roger Sohn designs the denture to fit your facial shape and personality. Your teeth are so real that even dentists are fooled.Esthetic Smile Makeover
Who can benefit from a smile makeover? Patients with crowded, crooked or short teeth or those with spaces between many teeth, patients with congenitally underdeveloped or disfigured teeth or an entire smile darkened and stained by tetracycline medicine. Because this is a makeover, not just a few front teeth, we are very conscious about how each tooth restoration will effect the other. Replacing the front six or eight teeth might make the most sense when considering what most people will see when you smile, but only enhancing a few front teeth can mean those new teeth might be prone to break or chip. An esthetic makeover without proper planning and follow through is not in our patients’ best long-term interest. Since we strive for the highest quality and long-term patient satisfaction, it is difficult to proceed unless the patient approves a comprehensive makeover when warranted. Not every patient needs a comprehensive makeover, but we want to make sure our patients get the care they deserve. For information on the techniques we use to create a smile makeover go to restorative and esthetic sections below.Complete Rehabilitation
There are many reasons why one might need a full dental reconstruction. It can be because periodontal disease has destroyed supporting bone causing the loss of teeth or because of recurrent decay on multiple crowns and bridges. Maybe there are bite problems, which have caused excessive wear on the natural teeth and aggravated the TM jaw joint. Perhaps there has been traumatic injury to the mouth and teeth. These conditions could warrant a rehabilitation of the entire mouth. Properly diagnosed, planned and executed, this type of dentistry has allowed patients to return to a comfortable, functional, stable oral health. A beautiful smile is an added benefit of this kind of dentistry. In addition, Teeth in a Day Technology allow rehabilitation and cosmetic dentstry to reverse decades of damage in about a day. We believe patients are best served by taking advantage of our comprehensive expertise right from the beginning. If you are ready for a comprehensive approach, please call us. For information on the techniques used to bring back health and harmony, go to the restorative and implant sections below.Esthetic Techniques
Porcelain Veneers
A straighter, whiter, fuller smile is possible without braces and usually in two visits with veneers. These porcelain restorations are lifelike in strength, beauty and function.Tooth Contouring or Bonding
Chipped, cracked teeth refashioned and gaps closed usually in one visit. An enamel-like resin material is molecularly bonded to your teeth, layer by layer, to form a durable, natural-like fusion.Smile Whitening
Professional, in-office Power Teeth Bleaching using BriteSmile technology is the most researched and scientifically proven way to whiten the teeth in the shortest time and the greatest number of shades. After little over an hour, your teeth are far whiter than they ever were. Years of smoking, coffee, and age can be erased. Touch-up treatments are needed since the teeth do continue to age along with the rest of you!Modern Orthodontics or Braces
Depending on the way a smile has developed braces might be the best and most effective solution for getting the results desired by the patient. Fortunately, straightening teeth for adults and children is faster and easier than ever before with “invisible” clear braces and “removable” braces.Gum line Reshaping
A smile can be transformed from gummy to perfect with painless laser treatment. Our expertise in laser dentistry offers patients a high level of artistic results and comfort.Restorative Care
Ceramic Inlays or Onlays
These are amazing breakthroughs in restorative care. Not too long ago we would have been placing many more crowns. When a tooth deteriorated from disease or cracked because of an old metal filling, it often required removal of significant natural tooth structure to securely place a crown. Now, there is an ‘in-between’ solution. With ceramic onlays or inlays, we remove much less tooth to create an appropriate surface to secure the natural looking, tooth-like material. It’s molecularly bonded for a strong, durable, nature-mimicking result that can withstand the tremendous biting and chewing forces the mouth produces.Porcelain Crowns
Restoring worn, broken down teeth is more effective with modern esthetic crowns because they are molecularly bonded to your teeth not cemented like metal-based crowns. Because they are ALL-porcelain you won’t ever see a darkened line near the gum line like a metal-based crown.Porcelain Bridges
This natural-looking, missing teeth option can give patients the ability to remove their partial denture for good.Tooth-Colored ‘Fillings’
This is the modern, non-metal, healthier alternative to silver mercury fillings – minimal removable of tooth structure is required. Metal fillings usually need more space so they can be ‘plugged in’. Composite resin restorations or tooth-colored ‘fillings’ are molecularly bonded – creating a fusion of nature and advanced material. It’s healthy high-tech care.Continuing Smile Care
The bacteria that cause periodontal (gum) disease and tooth decay are constantly present in our mouths. Home care is our first defense against this onslaught. However, brushing and flossing isn’t enough. That’s why we recommend a minimum of two visits each year to our office. Please read our periodontal care information below.We offer many services that make your visit more comfortable and can help you keep your teeth healthy for life. As a comprehensive dental practice with specialized training, we can give you the care you deserve.
• Dentistry for adults
• Dentistry for the fearful; Sedation Dentistry
• Painless, one visit root canals
• TMJ (jaw joint) Therapy - to relieve aches and pains
• Wisdom Teeth removal • Orthodontics - adults and children
• Restorative/Esthetic Dentistry • Crowns, bridges, veneers, bonding, natural-looking fillings
• Dental Implants
• Cosmetic Dentures & Cosmetic Partials
• Sedation Dentistry
• Second Opinions
• Periodontal (gum and bone infection) Treatment
Our hygienist has received professional awards for her gentle and caring skills in controlling periodontal disease. Because it is the leading cause of tooth loss in adults, we are diligent in our approach to making sure periodontal disease doesn’t destroy your smile. If you have noticed bleeding while brushing or flossing, you are experiencing the early stages of the disease. Please call our office and set up an appointment. We have many advanced treatments that can keep the disease from ruining your smile.
Periodontal disease may significantly impact pregnant individuals or those with diabetes or cardiovascular disease. Individuals with periodontal disease may have significantly increased risk for heart diseases and stroke. Women with periodontitis may have increased risk for delivering pre-term, low birth weight babies. Preliminary evidence suggests that periodontal infections may also be associated with lung disease and other remote site infections.
Cosmetic dentistry
Cosmetic dentistry may also provide restorative benefits. For example, dental fillings are a common procedure used to treat decayed teeth. Previously, most dental fillings were composed primarily of gold, amalgam and other materials that left visible dark spots on the teeth.Low Cost Dental Implants
If you're looking for affordable dental implants or cheap dental implants There are many different types of cosmetic dental implants so if you're think of having this procedure done it really pays to learn about what all these methods are because you might find that one method is more suitable for you than others. Unfortunately teeth don't always last forever and this is especially true of those on Western diets who eat large amounts of sugar. It's no wonder that teeth have a tendancy to fall out even at relatively young ages. I do desire that I would like to improve upon this in the future. This may be out of character, but there is no reason to let this go. Some people will wear dentures however having affordable dental implants are considered to be the ultimate solution.You can either have dental implants which are just for individual teeth or you can have it where it's bridge implants. The individual implants can be inserted into the jaw because they aren't connected to the other teeth next to it. However if you have a number of teeth missing or want them replaced then you can have a number of teeth fitted to a bridge which is then placed into the jaw. I have a degree in dental implant dentist. This should raise your friend's eyebrows. There is really unlimited demand for it. When the inexpensive implants are then put into position the crowns can then be put on top.
Teeth are so important for people's self confidence. A beautiful pearly smile can really show off your personality as much as anything else. You don't have to be the most beautiful person in the world but a beautiful smile can really make your personality shine. Once implants have been inserted in to your mouth you will find that your self-confidence will go through the roof. That was a lie. I'll go out there and try to follow these steps. This is totally confidential. This isn’t always easy to do. The competition for low price dental implants Houston Texas is stiff out there. Not only that, but you'll be able to eat all the foods that you might have had trouble doing so before. Dental implants and real teeth are just as strong as each other and there is no real difference.
When it comes to the different types you will find that there is endosteal implants, artificial bone substitute implant and sub-periosteal implants. Endosteal implants are put into position by wedging them into the jaw instead of havng your dental root. Artificial bone substitute implants are made of calcium substitute and are fitted over the jaw bone. Over time you will find that that it bonds to your jaw bone. You won't believe these are the things that kept me smiling about dental implant surgeon. It is a given that I shall indeed offer to myself to what my enemies must not venting about it. Elderly patients will find that best price sub-periosteal implants are preffered if they find that they can't wear dentures any more. They are fixed straight onto the jaw bone.
It used to be that surgery involving denterstry was very painful but this is no longer the case. You will find that the whole preocedure is very pain-free thanks to local anesthetics. However it should be noted that only qualified surgeons should ever carry out this sort of discount surergy and you will find that these persons are periodontists and maxillofacial surgeon. It's important to acknowledge the problem of that one, cause it certainly won't be going away any time soon. Cosmetic dental implants is wonderful.
Although dental implants are considered to be just as good as real teeth, you still need to look afte them although nothing special is needed. All you need to do is brush and floss your teeth like you would normally do and you should also have regular dental check-ups. Save as much as you can on a this you are trying to buy. That's the wrong worldview. All in all, cosmetic dental implants isn't a bad experience. You might be advised to stay away from eating particularly chewy foods because this will put too much straign on your artificial crown.
Dental implant dentists are not cheap and you will have to probably take out a loan or save up for a while in order ot be able to afford the treatment. The cost will vary depending on the type and also the surgeon. However about $500 to $6000 is the normal price range to expect. Unfortunately if you have a dental plan you probably won't be able to recoup the money because you won't be covered for dental implants. You should think long and hard about cosmetic dental implants.
Same Day Dental Implants
If you have a fractured or decayed tooth that needs to be extracted, a dental implant may be placed at the time of the tooth extraction. However, if your fractured or decayed tooth is infected, immediate dental implant placement is not advisable.Dental implant cost
Dental implants can be a costly procedure. An entire team of professionals is often needed to deliver a long-lasting smile. Implant procedures demand a great deal of the doctor's and staff's time and effort. The prosthodontist intensely studies your health profile, and then develops a plan to meet your unique needs. Additionally, surgical staff and the laboratory perform several services to produce the desired result. The materials used to construct implant prosthodontics are also very expensive. Bone grafting, if needed, is additionally costly.While a basic implant is typically $1,250. to $3,000., depending on your circumstances additional costs for things such as in the case of a posterior mandible, bone regeneration, sinus elevation, and wide diameter or narrow diameter implants quickly escalate to as much as $15,000 to $30,000. for the complete procedure for the upper or lower jaw.
Zimmer dental implants
The AdVent® and Tapered Screw-Vent® systems raise the standard in implant dentistry with superior features that make the implant process efficient and predictable. The complete versatility of the system means there's an AdVent or Tapered Screw-Vent implant for any indication.The single-stage Tapered SwissPlus® implant simplifies and accelerates the implant process to save valuable chairtime, increase productivity and maximize profits.
Zimmer Dental is committed to providing innovative surgical products that meet your needs and earn your trust.
Dental Implant History
The Mayan civilization has been shown to have used the earliest known examples of endosseous implants (implants embedded into bone), dating back over 1,350 years before Per Brånemark started working with titanium. While excavating Mayan burial sites in Honduras in 1931, archaeologists found a fragment of mandible of Mayan origin, dating from about 600 AD. This mandible, which is considered to be that of a woman in her twenties, had three tooth-shaped pieces of shell placed into the sockets of three missing lower incisor teeth. For forty years the archaeological world considered that these shells were placed under the nose in a manner also observed in the ancient Egyptians. However, in 1970 a Brazilian dental academic, Professor Amadeo Bobbio studied the mandibular specimen and took a series of radiographs. He noted compact bone formation around two of the implants which led him to conclude that the implants were placed during life.In the 1950s research was being conducted at Cambridge University in England to study blood flow in vivo. These workers devised a method of constructing a chamber of titanium which was then embedded into the soft tissue of the ears of rabbits. In 1952 the Swedish orthopaedic surgeon, P I Brånemark, was interested in studying bone healing and regeneration, and adopted the Cambridge designed rabbit ear chamber for use in the rabbit femur. Following several months of study he attempted to retrieve these expensive chambers from the rabbits and found that he was unable to remove them. Per Brånemark observed that bone had grown into such close proximity with the titanium that it effectively adhered to the metal. Brånemark carried out many further studies into this phenomenon, using both animal and human subjects, which all confirmed this unique property of titanium.
Although he had originally considered that the first work should centre on knee and hip surgery, Brånemark finally decided that the mouth was more accessible for continued clinical observations and the high rate of edentulism in the general population offered more subjects for widespread study. He termed the clinically observed adherence of bone with titanium as osseointegration. In 1965 Brånemark, who was by then the Professor of Anatomy at Gothenburg University in Sweden, placed the first titanium dental implant into a human volunteer, a Swede named Gösta Larsson.
Over the next fourteen years Brånemark published many studies on the use of titanium in dental implantology until in 1978 he entered into a commercial partnership with the Swedish defense company, Bofors AB for the development and marketing of his dental implants. With Bofors (later to become Nobel Industries) as the parent company, Nobelpharma AB (later to be renamed Nobel Biocare) was founded in 1981 to focus on dental implantology. To the present day over 7 million Brånemark System implants have now been placed and hundreds of other companies produce dental implants. All dental implants currently available are axilly symmetric (cylindrical form) and do not fit precisely in the individual tooth socket. For this reason additional risky and costly interventions are regularly required to fill the gaps between the implant and bone.
The latest development in immediate dental implantology are root analogue Zirconia implants, which fit better into the extraction socket. Long term studies are lacking.
Dental Implant Procedure
A typical implant consists of a titanium screw (resembling a tooth root) with a roughened or smooth surface. The very first implants were made out of commercially pure titanium, however since it was discovered that the TiAl6V4 alloy offered the same osseointegration level as commercially pure titanium, more and more implants were made out of TiAl6V4 alloy due to its better tensile strength and thus fracture resistance. Today most implants are made out of the TiAl6V4 alloy and treated either by plasma spraying, etching or sandblasting to increase the surface area and, thus the integration potential of the implant. An osteotomy or precision hole is carefully drilled into jawbone and the implant is installed in the osteotomy.Implant surgery is typically performed as an outpatient under general anesthesia or with local anesthesia by trained and certified clinicians including general dentists, oral surgeons, and periodontists. An increasing number of general or cosmetic dentists as well as prosthodontists are also placing implants in relatively simple cases. The most common treatment plan calls for several surgeries over a period of months, especially if bone augmentation (bone grafting) is needed to support implant placements. At the other end of the surgery scale, some patients can be implanted and restored in a single surgery, in a procedure labeled "immediate function" and "teeth in an hour."
A single implant procedure that involves an incision and "flapping" of the gum or gingiva (to expose the jawbone) takes about an hour, sometimes longer; multiple implants can be installed in a single surgical session lasting several hours. At the conclusion, the patient goes through a period of recovery, returns to consciousness and is sent home with a relative or friend.
Healing and integration of the implant(s) with jawbone occurs over several months in a process called osseointegration. At the appropriate time, the restorative or cosmetic dentist or prosthodontist uses the implant(s) to anchor crowns or a prosthetic restoration containing several "teeth". Since the implants supporting the restoration are integrated, which means they are biomechanically stable and strong, the patient is immediately able to masticate (chew) normally.
In an immediate function procedure, the gingiva is not flapped (Flapless). Instead, the surgeon removes a small plug of gingiva directly over the drilling site. The site is drilled and the implant is installed. Then a crown is immediately added. Patients are cautioned to give their new "teeth in an hour" ample healing/integration time (weeks or months) before attempting normal mastication.
There are different approaches to place dental implants after tooth extraction. The approaches are:
Immediate post-extraction implant placement.
Delayed immediate post-extraction implant placement (2 weeks to 3 months after extraction).
Late implantation (3 months after tooth extraction).
According to the timing of loading of dental implants, the procedure of loading could be classified into:
Dental Implant Immediate loading procedure
Most patients need the longer treatment plan, which has an excellent history going back many years. Before surgery, with the patient fully awake or during an earlier office visit, a prudent clinician planning mandibular implants will conduct a neurosensory examination to rule out altered sensation, thus setting a base line on nerve function. Also prior to surgery, a panoramic X-ray will be taken using a metal ball of known dimension so that calibrated measurements can be made from the image (to accurately locate "vital structures" such as nerves and the position of critical anatomical features such as the mental foramen, which is the transit point in the jawbone for the nerve which innervates the lip and chin).At edentulous (without teeth) jaw sites, a pilot hole is bored into the recipient bone, taking care to avoid vital structures (in particular the inferior alveolar nerve or IAN within the mandible). A zone of safety, usually 2 mm, is the standard of care for avoiding vital structures like the IAN. When computed tomography (3D X-ray imaging) is used preoperatively to accurately pinpoint vital structures, the zone of safety may be reduced to 1 mm through the use of computer-aided design of surgical guides.
Drilling into jawbone usually occurs in several separate steps. The pilot hole is expanded by using progressively wider drills (typically between three and seven successive drilling steps, depending on implant width and length). Care is taken not to damage the osteoblast or bone cells by overheating. A cooling saline spray keeps the temperature of the bone to below 47 degrees Celsius (approximately 117 degrees Fahrenheit). The implant screw can be self-tapping, and is screwed into place at a precise torque so as not to overload the surrounding bone (overloaded bone can die, a condition called osteonecrosis, which may lead to failure of the implant to fully integrate or bond with the jawbone). Typically in most implant systems, the osteotomy or drilled hole is about 1mm deeper than the implant being placed, due to the shape of the drill tip. Surgeons must take the added length into consideration when drilling in the vicinity of vital structures.
Once properly torqued into the bone, a cover screw is placed on the implant, then the gingiva or gum is sutured over the site and allowed to heal for several months for osseointegration to occur between the titanium surface of the implant and jawbone.
After several months the implant is uncovered in another surgical procedure, usually under local anesthetic by the restorative dentist or prosthodontist, and a healing abutment and temporary crown is placed onto the implant. This encourages the gum to grow in the right scalloped shape to approximate a natural tooth's gums and allows assessment of the final aesthetics of the restored tooth. Once this has occurred a permanent crown will be fabricated and placed on the implant.
An increasingly common strategy to preserve bone and reduce treatment times includes the placement of a dental implant into a recent extraction site. In addition, immediate loading is becoming more common as success rates for this procedure are now acceptable. This can cut months off the treatment time and in some cases a prosthetic tooth can be attached to the implants at the same time as the surgery to place the dental implants.
In all of these approaches, computer-based guidance has thrust itself onto the treatment stage. Not only will 3D digital imagery yield critical treatment guidance, the digital data can be used to manufacture precision drilling guides, virtually eliminating surgical errors.
Cosmetic dental implants
Sinus lifting is a common surgical intervention. A dentist or specialist with proper training such as an endodontist, periodontist, prosthodontist, or oral surgeon thickens the inadequate part of atrophic maxilla towards the sinus with the help of bone transplantation or bone expletive substance. This results in more volume for a better quality bone site for the implantation.Bone grafting will be necessary in cases where there is a lack of adequate maxillary or mandibular bone in terms of front to back (lip to tongue) depth or thickness; top to bottom height; and left to right width. Sufficient bone is needed in three dimensions to securely integrate with the root-like implant. Improved bone height -- which is very difficult to achieve -- is particularly important to assure ample anchorage of the implant's root-like shape because it has to support the mechanical stress of chewing, just like a natural tooth. If an implant is too shallow, chewing may cause a dangerous jawbone crack or full fracture.
Typically, implantologists try to place implants at least as deeply into bone as the crown or tooth will be above the bone. This is called a 1:1 crown to root ratio. This ratio establishes the target for bone grafting in most cases. If 1:1 or better cannot be achieved, the patient is usually advised that only a short implant can be placed and to not expect a long period of usability.
A wide range of grafting materials and substances may be used during the process of bone grafting / bone replacement. They include the patient's own bone (autograft), which may be harvested from the hip (iliac crest) or from spare jawbone; processed bone from cadavers (allograft); bovine bone or coral (xenograft); or artificially produced bonelike substances (calcium sulfate with names like Regeneform; and hydroxyapatite or HA, which is the primary form of calcium found in bone). The HA is effective as a substrate for osteoblasts to grow on. Some implants are coated with HA for this reason.
Bone graft surgery has its own standard of care. In a typical procedure, the clinician creates a large flap of the gingiva or gum to fully expose the jawbone at the graft site, performs one or several types of block and onlay grafts in and on existing bone, then installs a membrane designed to repel unwanted infection-causing microbiota found in the oral cavity. Then the gingiva is carefully sutured over the site. Together with a course of internal antibiotics and external antibiotic mouth rinses, the graft site is allowed to heal (several months).
The clinician typically takes a new panoramic x-ray to confirm graft success in width and height, and assumes that positive signs in these two dimensions safely predicts success in the third dimension, depth. Where more precision is needed, usually when mandibular implants are being planned, a 3D or cone beam X-ray may be called for at this point to enable accurate measurement of bone and location of nerves and vital structures for proper treatment planning. The same X-ray data set can be employed for the preparation of computer-designed placement guides.
Correctly performed, a bone graft produces live vascular bone which is very much like natural jawbone and is therefore suitable as a foundation for implants.
Dental Implant Considerations
For dental implant procedure to work, there must be enough bone in the jaw, and the bone has to be strong enough to hold and support the implant. If there is not enough bone, more may need to be added with a bone graft procedure discussed earlier. Sometimes, this procedure is called bone augmentation. In addition, natural teeth and supporting tissues near where the implant will be placed must be in good health.In all cases, what must be addressed is the functional aspect of the final implant restoration, the final occlusion. How much force per area is being placed on the bone implant interface? Implant loads from chewing and parafunction can exceed the physio biomechanic tolerance of the implant bone interface and/or the titanium material itself, causing failure. This can be failure of the implant itself (fracture) or bone loss, a "melting" or resorption of the surrounding bone.
The dentist must first determine what type of prosthesis will be fabricated. Only then can the specific implant requirements including number, length, diameter, and thread pattern be determined. In other words, the case must be reverse engineered by the restoring dentist prior to the surgery. If bone volume or density is inadequate, a bone graft procedure must be considered first. The restoring dentist may consult with the periodontist, endodontist, oral surgeon, or another trained general dentist to co-treat the patient. Usually, physical models or impressions of the patient's jawbones and teeth are made by the restorative dentist at the implant surgeons request, and are used as physical aids to treatment planning. If not supplied, the implant surgeon makes his own or relies upon advanced computer-assisted tomography or a cone beam CAT scan to achieve the proper treatment plan.
Computer simulation software based on CAT scan data allows virtual implant surgical placement based on a barium impregnated prototype of the final prosthesis. This predicts vital anatomy, bone quality, implant characteristics, the need for bone grafting, and maximizing the implant bone surface area for the treatment case creating a high level of predictability. Computer CAD/CAM milled or stereo lithography based drill guides can be developed for the implant surgeon to facilitate proper implant placement based on the final prosthesis occlusion and aesthetics.
Treatment planning software can also be used to demonstrate "try-ins" to the patient on a computer screen. Software products like Materialise' SimPlant (simulated implant) use the digital data from a CAT scan (such as an iCAT or a NewTom) to provide extremely accurate simulations that are easily understood by patients. When options have been fully discussed between patient and surgeon, the same software can be used to produce precision drill guides.
Dental Implant Success rates
Dental implant success is related to operator skill, quality and quantity of the bone available at the site, and also to the patient's oral hygiene. Various studies have found the 10 year success rate of implants to be between 90 and 95%. Patients who smoke experience significantly poorer success rates.Dental Implant Failure
Failure of a dental implant is often related to failure to osseointegrate correctly. A dental implant is considered to be a failure if it is lost, mobile or shows peri-implant (after implant) bone loss of greater than 1.0 mm in the first year and greater than 0.2mm a year thereafter.Dental implants are not susceptible to dental caries but they can develop a periodontal condition called peri-implantitis. The cause may be infection that was introduced during surgery; or failure by the patient to follow correct oral hygiene routines. In either case, inflammation in the bone surrounding the implant causes bone loss (recession) which ultimately may lead to failure, often evidenced by the ability to "spin" an implant.
Peri-implantitis is often dealt with pre-emptively by clinicians who prescribe a course of antibiotics in the days prior to surgery; and post-surgically with another course of antibiotics and special oral rinses. Since peri-implantitis is generally easy to see on standard panoramic and periapical X-rays, prudent clinicians who suspect the problem will take an X-ray soon after surgery, and again at staged intervals post-operatively.
Risk of failure is increased in smokers. For this reason implants are frequently placed only after a patient has stopped smoking as the treatment is very expensive. More rarely, an implant may fail because of poor positioning at the time of surgery, or may be overloaded initially causing failure to integrate. If smoking and positioning problems exist prior to implant surgery, clinicians often advise patients that a bridge or partial denture rather than an implant may be a better solution.
Dental Implant Contraindications
There are no absolute contraindications to implant dentistry, however there are some systemic, behavioral and anatomic considerations that should be considered.Particularly for mandibular (lower jaw) implants, especially in the vicinity of the mental foramen (MF), there must be sufficient alveolar bone above the mandibular canal also called the inferior alveolar canal or IAC (which acts as the conduit for the neurovascular bundle carrying the inferior alveolar nerve or IAN).
Failure to precisely locate the IAN and MF invites surgical insult by the drills and the implant itself. Such insult may cause irreparable damage to the nerve, often felt as a paresthesia (numbness) or dysesthesia (painful numbness) of the gum, lip and chin. This condition may persist for life and may be accompanied by unconscious drooling.
Lack of sufficient alveolar bone is another contraindication to the procedure. Typically, a preoperative in-office panoramic X-ray is taken to establish (with allowances for image distortion, a known problem with panoramic X-rays) in two dimensions (height and width) the amount of available bone. A bone graft or augmentation procedure may be performed and allowed to heal several months before implantation surgery. A new panoramic X-ray will help determine if the graft was successful.
This is an important step inasmuch as improved bone height is much more difficult to achieve than more increased bone depth. For mandibular grafts, a 3D or cone beam X-ray enables measurement of bone height (top to bottom), width (left and right) and depth (front to back) to an accuracy of 0.1mm. The precision of cone beam has stimulated a new industry that produces computer-designed surgical guides based on the cone beam X-ray's digital data. These surgery aids are employed by implantologists to precisely locate and drill into the mandible and maxilla, and to avoid vital structures.
Uncontrolled type II diabetes is a significant relative contraindication as healing following any type of surgical procedure is delayed due to poor peripheral blood circulation. Anatomic considerations include the volume and height of bone available. Often an ancillary procedure known as a block graft or sinus augmentation are needed to provide enough bone for successful implant placement.
There is new information about intravenous and oral bisphosphonates (taken for certain forms of breast cancer and osteoporosis, respectively) which may put patients at a higher risk of developing a delayed healing syndrome called osteonecrosis. Implants are contraindicated for some patients who take intravenous bisphosphonates.
The many millions of patients who take an oral bisphosphonate (such as Actonel, Fosamax and Boniva) may be advised to stop the administration prior to implant surgery, then resume several months later. But this protocol may not be necessary. As of January, 2008, an oral bisphosphonate study reported in the February 2008 Journal of Oral and Maxillofacial Surgery, reviewing 115 cases that included 468 implants, concluded "There is no evidence of bisphosphonate-associated osteonecrosis of the jaw in any of the patients evaluated in the clinic and those contacted by phone or e-mail reported no symptoms." (JOMS, Volume 66, Issue 2, Ppgs 223-230).
The American Dental Association had addressed bisphosphonates in an article entitled "Bisphosphonate medications and your oral health," (JADA, Vol. 137, page 1048, July 2006.) In an Overview, the ADA stated "The risk of developing BON bisphosphonate-associated osteonecrosis of the jaw in patients on oral bisphosphonate therapy appears to be very low...". The ADA Council on Scientific Affairs also employed a panel of experts who issued recommendations for clinicians for treatment of patients on oral bisphosphonates, published in June, 2006. The overview may be read online at ada.org but it has now been superseded by a huge study -- encompassing over 700,000 cases -- entitled "Bisphosphonate Use and the Risk of Adverse Jaw Outcomes." Like the 2008 JOMS study, the ADA study exonerates oral bisphosphonates as a contraindication to dental implants. (JADA, January 2008, 139:23-30).
Bruxism (tooth clenching or grinding) is another contraindication. The forces generated during bruxism are particularly detrimental to implants while bone is healing; micromovements in the implant positioning are associated with increased rates of implant failure. Bruxism continues to pose a threat to implants throughout the life of the recipient. Natural teeth contain a periodontal ligament allowing each tooth to move and absorb shock in response to vertical and horizontal forces. Once replaced by dental implants, this ligament is lost and teeth are immovably anchored directly into the jaw bone. This problem can be minimized by wearing a custom made mouthguard (such an NTI appliance) at night.
Postoperatively, after implants have been placed, there are physical contraindications that prompt rapid action by the implantology team. Excessive or severe pain lasting more than three days is a warning sign, as is excessive bleeding. Constant numbness of the gingiva (gum), lip and chin -- usually noticed after surgical anesthesia wears off -- is another warning sign. In the latter case, which may be accompanied by severe constant pain, the standard of care calls for diagnosis to determine if the surgical procedure insulted the IAN. A 3D cone beam X-ray provides the necessary data, but even before this step a prudent implantologist may back out or completely remove an implant in an effort to restore nerve function because delay is usually ineffective. Depending upon the evidence visible with a 3D X-ray, patients may be referred to a specialist in nerve repair. In all cases, speed in diagnosis and treatment are necessary.
Dental Implant The market
In the United States, implantology is not a recognized specialty. Various implant surgeons play a role in the placement of dental implants. Specialists with adequate comprehensive training such as Prosthodontists are ideally preferred. Other specialists such as periodontists, oral surgeons, and endodontists participate in the placement of implants. Also, some general dentists trained and skilled in implant surgery may place dental implants. However caution is warranted as a rigorous training cannot be substituted with a weekend course. It is almost always necessary for advanced bone surgical skills (such as grafting) to be employed during implant treatment. Therefore, it is important for the implant surgeon to be able to have surgical options available, through adequate training, to serve the needs of patients. It is common for implant care to be coordinated amongst the designated implant surgeon and the dentist for the placement of the implant and restoration of the implant with a tooth, teeth, or some other form of a prosthesis such as an implant supported over-denture or perhaps a hybrid prosthesis.
