Lingually Displaced Mandibular Canines & Hard Palate Trauma
This condition is most often spotted at either the first or second puppy checks or between 6 and 8 months of age as the permanent (adult) teeth erupt. Either the deciduous or permanent lower canines occlude into the soft tissues of the roof or the mouth causing severe discomfort and, possibly, oral nasal fistulae.
See our FAQ sheet for further information regarding this condition in young pups.
The fact sheet answers many questions you may have about the cause of this problem and the various treatments available. It is important not to delay treatment of deciduous lower canines as the window of opportunity is only a matter of a few weeks until the permanent canines erupt at 22 to 26 weeks of age. A new problem can then present with bigger teeth causing more damage.
We advise you email us images of the teeth (mouth closed, lips up and side on for both left and right) just a few days before you travel. Things change quickly in growing dogs and it might save you a wasted journey.
This is an inherited condition - an autosomal recessive mutation. Both parents may look normal but carry recessive genes for the condition. When this genetic information is passed onto the litter, approximately one pup in four will be affected, appear abnormal and can pass the genetic information on if bred from. In addtion, two pups in four will carry an abnormal gene from one parent and a normal gene from the other. This pups will look normal but can pass the problem on if bred. Finally one pup in four will not be a carrier of abnormal genes, will be unaffected and cannot pass the trait on to future generations.
If this condition appears in the litter, the most responsible course of action is not to breed from the parents again - either as a pair or individually with others. As there is currently no test to identify this gene, selecting another mate may mean they too are recessive carriers. All the normal looking sibling pups are likely to also carry the recessive genes. It is wise that they too do not contribute to passing the problem back into the breed's gene pool. In many affected breeds, the gene pool of breeding individuals to select from is very small. If recessive carriers are routinely mating then it is not long before increasing numbers of pups appear with this condition. Over four decades we have monitored the breeds treated here and it is disappointing to note that many previously unaffected breeds are now being seen on a regular basis.
When a pup is treated for this condition we routinely supply the Kennel Club with a Change of Conformation form so they can track the parental origin. We also ask for permssion to send a DNA swab to the Animal Health Trust. This is anonymously evaluated as part of a research programme to identify the exact genetic origin of the condition with the aim of a simple test becoming available to identify recessive carriers. In time this will allow owners of known recessive carriers to select a mate unaffected by the condition.
Owners with young puppies identified with this problem at first presentation are advised to have the deciduous lower canines removed as soon as possible. There are three reasons for this:
- Firstly, and most importantly, these teeth are sharp and hitting the soft tissues of the palate. These pups cannot close their mouth without pain and often hold the mouth slightly open to avoid contact. This is not pleasant. See above for an example of the damage caused to the hard palate by this problem.
- Secondly, the growth of the mandible is rostral from the junction of the vertical and horizontal ramus. If the lower canines are embedded in pits in the hard palate, the normal rostral growth of the mandible(s) cannot take place normally due to the dental interlock caused by the lower canines being embedded in hard palate pits. This can cause deviation of the skull laterally or ventral bowing of the mandibles (lower jaws).
- Thirdly, the permanent lower canine is located lingual to the deciduous canine. This means that if the deciduous lower canines are in a poor position it is a certainty the permanent teeth will be worse. See the radiograph below. The deciduous canines are on the outside of the jaws and the developing permanent canines are seen in the jaw as small "hats". It is clear that the eruption path of the permanent canines will be directly dorsal and not buccally inclined as is normal.
For these three reasons it is advisable to surgically remove the lower canine teeth as soon as possible to allow maximum time between the surgery and the time the permanent teeth erupt at between 22 and 24 weeks of age. See our file for illustration of removal of deciduous canines.
It is our opinion that it is necessary to remove these teeth surgically via wide based flaps. The reasons are:
The deciduous tooth root is three to four times longer than the visible crown and curved - often 2.5cm in lengthand curved. The root apex is often located below the third lower premolar. See middle and right images below with extracted deciduous tooth laid over extraction site.
The roots arevery fragile and will break easily if unduly stressed during removal. A broken root needs to be identified and removed otherwise it continues to form a barrier to the eruption path of the permanent canine and can cause local infection.
The permanent successor tooth is located lingual to the deciduous tooth and wholly within the jaw at this stage. Any use of luxators or elevators on the lingual half of the deciduous tooth will cause permanent damage to the developing enamel of the permanent tooth. See the images below showing canines (and also the third incisor) with extensive damage to the enamel. The radiograph also shows how much damage can occur to the teeth - see the top canine and adjacent incisor. Some severely damaged teeth need to be extracted while other can be repaired with a bonded composite. This damage is avoidable with careful technique using an open surgical approach.
Surgery to remove the deciduous canines may not prevent to need for surgery on the permanent canines but, without it, few cases will resolve if left to nature. Many owners are reluctant to have young pups undergo surgery. Our view is that surgical removal of the lower deciduous canines will not guarantee the problem does not happen again when the permanent teeth erupt but without surgerythe chances are very slim.
Crown extension therapy in pups
In a few selected cases - usually only very mild lingual displacement - we can consider placing crown extensions on the lower canines to help guide them into a more natural position. It carries some uncertainly and will not be suited or work in all cases. The images below show crown extensions on a young Springer Spaniel.
Please note that the use of a rubber ball to assist tipping of the deciduous lower canines buccally is not appropriate at this age and will not work - see below.
If the permanent teeth are lingually displaced the pup is usually older than 24 weeks. The trauma caused by the teeth on the soft tissues can be considerable with pain as a consequence.
There are many misconceptions about ball therapy. Please read the following carefully.
Do not try ball therapy with deciduous (puppy) teeth. There are two main reasons for this. Puppy teeth are fragile and can easily break. More importantly, the adult canine tooth bud is developing in the jaw medial to the deciduous canine tooth (see radiograph above in the puppy section). If the deciduous crown tips outwards the root will tip inwards. This will push the permanent tooth bud further medial than it already is.
Ball therapy will only work with adult teeth and only in some cases where the lower canines have a clear path to be tipped sideways - laterally - through the space between the upper third incisor and canine. The window of opportunity can be quite short, around 6 weeks, and starts when the lower canine teeth are almost making contact with thehard palate.
If you are considering ball therapy ask your vet their opinion and get them to send us images of each side of the closed mouth from the side with mouth closed and lips up.
The size and type of the ball or Kong is critical. The ball diameter should be the distance between the tips of the two lower canine teeth plus 50%. Therefore if this distance is 30mm the ball diameter is 45mm. If the ball is too small it will sit between the lower canines and produce no tipping force when the pup bites down. Too large a ball can intrude the lower canines back into their sockets.
The ball should "give" when the pup bites down. The smooth semi-hollow rubber is best. Tennis balls are abrasive and can damage the tooth surface but for a short time may do the job we require.
The owner needs to encourage play with the ball several times a day (6 - 8) or as often as they will tolerate with a short attention span. The ball should be only at the front of the mouth to go any good. If there are no positive results in six weeks a further veterinary evaluation is advised.
The most authoritative text on the subject is found here. Verhaert L 1999 Journal of Veterinary Dentistry 16: 2, 69-75.
Lingually Displaced Adult Canines - Surgical Options
These permanent teeth can theoretically be treated by three options. Not all options are available to all cases. These options are described below and are either surgical removal of the lower canines teeth (and possibly incisors also), crown amputation and partial pulpectomy or orthodontics via an inclined bite plane bonded to the upper canines and incisors. The latter option may not be available to all dogs if the diastema (space) between the upper third incisor and canine is too small for the lower canines to move into or if the lower canines are located behind (palatal) to the upper canines.
Crown Amputation and Partial Coronal Pulpectomy
This is our favoured option and involves reducing the height of the lower canines to that of the adjacent incisors.
This is a sterile procedure to reduce the height of the lower canine crown that exposes the pulp. It requires a removal of some pulp (partial coronal pulpectomy) and placement of a direct pulp capping.
This is a very delicate procedure and carries very high success rate (in our hands) since the availability of Mineral Trioxide Aggregate (MTA). We have used it as the material of choice since 2005. The previous agent (calcium hydroxide) was much more caustic and tended to "burn" the pulp. The success rate of MTA treated cases is quoted as 92% in a seminal ten year study based in vet dental clinics in Finland. This compares with 67% when caclium hydroxide was previously the agent. Luotonen N et al, JAVMA, Vol 244, No. 4, February 15, 2014 Vital pulp therapy in dogs: 190 cases (2001–2011).
The intention of the procedure is to keep the pulp alive and allow the shortened lower canines to develop normally and contribute to the strength of the lower jaws.
Radiograph left lower canine before (left) and immediately after (right) surgery. Note the immature morphology of the canine teeth - thin walls and open root apices.
In order to monitor this process of maturation we need to radiograph these teeth twice at 4-6 months post-op and again at 12 -16 weeks post-op. This is a mandatory check. The quoted success reate of 92% implies 8% failure. Half of those to fail in the Luotonen study happened over a year post-op. To ensure any failure of maturity is identified wewill not perform this surgery unless the owner agrees to this.
Left lower canine 18 weeks post-op. Access filling intact.
The left radiograph shows the left lower canine immediately after crown amputation and partial pulpectomy. The right radiograph is same tooth 18 weeks post-op. Note the thicker dentine walls, development of an internal dentine bridge between pulp and direct pulp cap and the closed and matured root apex. These three criteria indicate a successful procedure at this stage.
The advantage of this procedure is that the whole of the root and the majority of the crown remain. The strength and integrity of the lower jaw is not weakened by the procedure and long term results are very good due to the use of Mineral Trioxide Aggregate as a direct pulp dressing.
Surgical extraction of the lower canine may seem attractive to clients as the problem is immediately dealt with without the uncertainties of orthodontics and the post-op check that is part of any crown amputation procedure.
However, many owners are concerned (rightly) about the loss of the tooth and the weakness it may cause to the lower jaw(s). It is not our preferred option. This is not an easy surgical extraction and the resulting loss of the root causes a weakness in the lower jaws. This is compounded if both lower canines are removed.
As this is an elective procedure (e.g. sterile) it is possible to use a bone allograft to fill the void created by the loss of the large canine tooth. The graft will promote new bone growth within a few weeks. Grafts can be very expensive as the void to be filled is large. This can increase the cost of the procedure markedly.
Lingually displaced lower left canine and root radiograph before surgery.
Image left lower canine area after surgical removal . Radiograph shows deficit in mandible once tooth no longer present.
Radiograph of socket once osteoallograft placed.
Crown Extensions on adult lower canine teeth
In some mild cases of lingual displacement we may be able to use crown extensions for a few weeks. For this treatment we bond composite resin extensions on the lower canines to increase the crown length by around 30%. This allows the lower canines to occupy the correct position and also provides more leverage to tip the crown tips buccally. The crown extensions remain in place for around 2 months and are then removed and the tooth surface smoothed and treated. The major downside is that if the dog damages or breaks them off, you need to return here for repairs. Sticks and other hard objects can easily cause damage and some toys also have to be withdrawn for the treatment period.
Orthodontic tipping as a treatment has the least certain outcome of all three option. It might seem less invasive than surgery but does require very careful case selection and management.
Normallya composite resin bite plane is bonded onto the upper teeth (see below) with an incline cut into the sides. The lower canine makes contact with the incline when the mouth closes and, over time, the force tips the tooth buccally. This takes around four to eight weeks. The lower canine will often migrate back into a lingually displaced position when the bite plane is removed. This can occur if the tooth height of the lower canine is too short (stunted). If the lower canine is not self-retained by the upper jaw when the mouth is shut further surgery may be required.
Orthodontic treatment will also conceal a defect and will not be performed unless the patient is neutered. In addition we have an ethical obligation to inform the Kennel Club of a change in conformation.
The images below show a lingually displaced left lower canine before treatment and after application of a bite plane. The bite plane remains in the mouth as long as it takes for the power of the bite to tip the lower canine into the normal position by pushing it up the incline.
Not all dogs or owners are suited to this. Bite planes can become dislodged if the dog bites a stick or other hard object. Bite planes also need cleaned and adjusted from time to time under sedation or anaesthesia. All of this means more travel and expense for you and more anaesthesia for your pet. It is our view that if a treatment has uncertain outcomes built in it should probably not be used.
Lingually Displaced Deciduous Canines (LDDC) is a genetic condition where a dog's lower deciduous canines (baby teeth) are growing into the hard palate (top of the mouth). The teeth are growing too far towards the tongue (lingually).Do canines have a lingual Ridge? ›
A maxillary canine usually displays a central strengthening ridge extending from the cingulum to the cusp. The mandibular canine does not display a central lingual ridge, thus the lingual surface is flatter.How long does it take for impacted canines to grow in? ›
Mandibular impacted canine. It may take up to 12 months to bring the canine into the dental arch and once it is there, it may take another year to finish its alignment. For more information read impacted mandibular canine both english and french version of the webpage.How do you fix an impacted canine tooth? ›
The most common treatment for impacted canine teeth is called exposure and bracketing, which involves the use of orthodontics and a simple surgical procedure. Once a space is opened up for the impacted canine tooth to be moved into position, the exposure and bracketing procedure will be performed by your oral surgeon.Is Lingually displaced canines hereditary? ›
This is an inherited condition - an autosomal recessive mutation. Both parents may look normal but carry recessive genes for the condition. When this genetic information is passed onto the litter, approximately one pup in four will be affected, appear abnormal and can pass the genetic information on if bred from.What causes tooth displacement? ›
A luxated tooth happens when the tissues, ligaments and sometimes bone that support your tooth become injured. Trauma, such as falls and accidents, can lead to tooth luxation.Which tooth has a lingual Ridge? ›
The lingual ridge extends from the cingulum to the cusp tip on the lingual surface of most canines. The cervical ridge runs mesiodistally on the cervical third of the buccal surface of the crown. These are found on all primary teeth but only on the permanent molars.Which tooth has most prominent lingual ridge? ›
Maxillary incisors have a more prominent cingulum (bulge on the lingual surface near the cervical region of the tooth). Occasionally the marginal ridges of maxillary incisors may be rounded along with displaying a cingulum pit, thus creating a shovel shape.
Primary etiological causes of maxillary canine displacement include space deficiency, disturbances in tooth eruption sequence, trauma, retention of primary canine, premature root closure, rotation of tooth buds, as well as localized pathological lesions (cysts, odontomas) .What happens if you don't fix impacted canines? ›
If the impacted canine tooth is left untreated, the damage to the adjacent tooth can progress, leaving it unrestorable and vulnerable to tooth loss.
An impacted tooth will virtually never fix itself, so make the call today!Can you fix an impacted canine without braces? ›
If you want the canine in the correct position, then braces is the only way. If it is 100% impacted, you can leave it as is. If a space is present, then a bridge is possible, but an implant is not, since the canine is where the implant would need to go.How do dentists remove canine teeth? ›
The extraction will generally be performed under by an oral surgeon. The un-erupted canine will then be exposed by lifting the gum, and guided into place using a special bracket. In the case of younger patients, an orthodontic brace may be fitted to create a space on the dental arch for the impacted canine.Can dentist remove impacted canine? ›
There are several options for the surgical treatment of impacted canines which might include: Filling the gap where the canine tooth should be, by means of a bridge or implant. Exposing part of the tooth allowing alignment correction. Sometimes, other teeth will need to be extracted to make space for the canine.Can you live with an impacted canine? ›
May Develop Pain and Swelling
For some people, an impacted canine won't ever cause a problem. However, it could irritate your gums. This will contribute to pain and swelling. It might also feel tender to the touch.
It will need something to reinforce and stabilize it, so that the ligaments and tissues around the teeth can tighten back into place. Such splits often involve a small wire or cement material that is bonded to the back surface of the tooth and the one next to it.How do you prevent tooth displacement? ›
To minimize the incidence of displacement, adherence to basic surgical principles is recommended. This includes gaining appropriate and generous surgical access with flap development, adequate bone removal and sectioning of teeth where appropriate to minimize any undue application of force.What percentage of people have impacted canines? ›
Also, approximately 2-3% of the population has an impacted canine, where the canine is stuck in the bone and does not want to come in. It is more common on the left side than the right side (how weird!) and it is more common in girls than boys (sorry ladies!).How long does it take a displaced tooth to heal? ›
If the traumatic incident caused no damage to the internal nerve structure of the tooth, your tooth will take up to 6 weeks to completely heal. Most of the damage will likely be from injured surrounding tissue that supports your tooth (the gum and bone tissue).Can a dentist reposition a tooth? ›
When a tooth is pushed out of place, a skilled dentist or endodontist (root canal specialist) can do the following: Reposition the tooth. Stabilize it until it heals. Perform root canal treatment within a few days of the injury.
Your teeth shift naturally throughout your life and as the result of other stressors and triggers. Orthodontic treatment often uses this natural capacity for change by deliberately altering your teeth and bite position. Causes of teeth shifting may include: The aging process.What is a lingual tooth? ›
Lingual – This is the surface of a tooth that is closest or next to your tongue. Palatal – Just like Lingual, this is the surface of a tooth that is closest or next to your tongue., but on your upper teeth this is called the palatal surface.What are lingual teeth? ›
Lingual braces have the same components as conventional braces, but they're fixed to the back of your teeth, on the tongue — or lingual — side of the teeth. Because they're behind your teeth, they're nearly invisible.What is the canine tooth called? ›
In mammalian oral anatomy, the canine teeth, also called cuspids, dog teeth, or (in the context of the upper jaw) fangs, eye teeth, vampire teeth, or vampire fangs, are the relatively long, pointed teeth.Which tooth has smoothest lingual surface? ›
o Mandibular canine: smoother lingual anatomy compared to its maxillary counterpart.Which tooth has a lingual pit? ›
Lateral incisors are more likely to have a lingual pit. The cingulum may be smaller, almost absent. The labial surface resembles that of a central incisor except that the labial surface is more convex.Which of the following permanent teeth can have a lingual pit that is at risk for caries? ›
The occlusal fissured surface of the first permanent molars and their lower buccal and upper lingual pits are among the most susceptible sites for caries .Why canines are removed for braces? ›
In certain orthodontic cases, dental extractions are sometimes necessary to alleviate crowded teeth and to establish a stable bite. These extractions are done before or during orthodontic treatment. Not all cases will require extractions – in fact, it is usually not necessary.Are high canines genetic? ›
Generally, the main issue if the position of the other teeth in the mouth. If teeth are poorly spaced or crowded, this can cause an emerging canine to emerge in a different position. Genetics and family history can increase the likelihood of this issue occurring.What is the strongest tooth in the permanent dentition? ›
Molars. Your molars are next to your premolars. They are your widest, flattest teeth and are the strongest, most powerful teeth. Generally, adults have twelve teeth in total – six on top and six on the bottom.
The operation takes between 30 minutes and 1 hour. You will normally be able to go home the same day. Once you are asleep or when the area is numb, the surgeon will remove a small piece of gum and bone to uncover the tooth.Can you live without your canine teeth? ›
You can live without canines if you do not have them, but you should not live with an impacted canine if you have any.How long does it take to recover from impacted canine surgery? ›
Pain or discomfort following surgery should begin to subside after the first three or four days. If pain persists, it may require attention and you should call the office.How rare are impacted canines? ›
While upper canines are in fact the second most commonly impacted teeth behind wisdom teeth, it is still considered rare, with an incidence in the U.S. population of approximately 2%. Impacted canines are far more common in females than in males. There are some well-documented causes of canine impaction.Is impacted canine surgery painful? ›
You should not feel any pain immediately after the operation as the area of surgery will be numb from the local anaesthetic. As the numbness wears off the area might become uncomfortable and then you should take painkillers.How long does it take to pull down an impacted canine with braces? ›
How Long Does it Take to Pull a Tooth Down with a Teeth Chain and Braces? It varies by case, but you can expect the process to take several months. Though it may come in faster, the general timeline is six to twelve months.What happens if you don't fix impacted teeth? ›
Leaving them in their impacted positions can cause jaw pain and headaches, gum inflammation, periodontal issues, cavities or dental caries, infection abscesses, and dental cysts. They can also cause damage to their neighboring teeth, causing crowding or the absorption of bone of other teeth.Do lingual braces work? ›
Lingual Braces Are Highly Precise
Because they are highly customised, lingual braces are ideal for correcting severely misaligned teeth. More complex orthodontic cases can include changing the heights of teeth. They can also involve closing gaps or correcting rotations.
Generally, because of the location and importance of these teeth, a dentist will try to avoid removing and replacing these teeth, if at all possible. Typically in most cases, your dentist will use a treatment to encourage the canine tooth to break through the gums. This is a decision you and your dentist make together.How long does canine dental surgery take? ›
In general, a good dental procedure—including anesthesia, the dental x-rays, a thorough oral exam under anesthesia with probing, and then a thorough cleaning—is going to take 45 minutes to an hour.
These sharp teeth help grip and tear food, so we can safely chew and swallow. Additionally, canine teeth help us form words properly. And when other teeth are erupting in the mouth, canine teeth serve as a guidepost to show the other teeth where to go.Can you replace a canine tooth? ›
Fortunately, with today's advanced restorative techniques, we can eventually replace the canines with dental implants, although that's best undertaken after the patient enters adulthood. In the meantime, we can utilize orthodontic means to preserve the open space and provide a temporary restorative solution.Can I eat after impacted canine surgery? ›
Soft food and liquids should be eaten on the day of surgery—avoid anything hot. Also be sure to drink plenty of liquids. We recommend drinking at least five to six glasses a day. Avoid using straws as the sucking motion can dislodge the blood clot around the impacted tooth surgical site.Can impacted canine teeth cause headaches? ›
Headaches and Impacted Teeth
There is a series of debilitating symptoms associated with this condition, as well such as infection, which brings swelling, pain and fever. Therefore, it is highly likely that the patient will experience intense headaches when developing impacted teeth.
In the current study, we also found that the relationships of the right impacted maxillary canines were closer with the maxillary sinuses, and this relationship could explain the significant increase of right maxillary sinus volume after orthodontic treatment of impacted canine.Which teeth are lingually inclined? ›
Clinical lingual crown inclination
Maximum lingual inclination occurred in the lower first molars. This means that there was a tendency to labial/ buccal inclination of upper teeth and lingual inclination of lower molar teeth.
When puppies usually grow out of the chewing phase, these dogs won't grow out of it. They will chew everything and it can actually be an issue for them and for their owners if expensive pieces of clothing or furniture are involved.Why do teeth drift Mesially? ›
As a result of crowding, our teeth have the tendency to move forward where space is available. This natural drifting of teeth is also partly a result of our chewing movements. As we chew, we are inadvertently causing movement of our teeth in their sockets.What causes impacted canine teeth? ›
The most common causes of tooth impaction are insufficient space in the jaw and the overcrowding, misalignment, or conflicting position of teeth in the jaw. This misalignment of teeth can cause emerging teeth to tilt or become displaced when attempting to emerge, which contributes to impacted teeth.Do permanent teeth erupt Lingually? ›
Lingually erupting lower permanent incisors will slowly move forward with the help of the tongue, exert pressure on lower primary incisors and in turn help the retained primary incisors to exfoliate. Studies have proven that lingual eruption of lower permanent incisors is a self-correcting phenomenon (see Fig.
Lingual tilting is par- ticularly apparent in posterior maxillary teeth, which have a normally buccal angula- tion. It is frequently accompanied by partial or total resorption of the buccal alveolar plate and by heavy wear on buccal roots.What is the perfect position of teeth? ›
Your teeth should meet together like cogs in a wheel. The pointed ends of the upper teeth should fit perfectly between two teeth on the bottom, while the upper teeth should sit slightly in front of your lower teeth.How do you fix a narrow canine base? ›
For base narrow canines in puppies, extraction or orthodontic correction are viable options. Both treatments eliminate discomfort from traumatic tooth-to-palate contact. If extraction is elected, careful controlled removal of the tooth must be achieved with care to avoid damaging the unerupted adult tooth.How much does it cost to remove retained puppy teeth? ›
If performed early, before any root resorption or damage to adjacent teeth occurs, simple closed extraction can be relatively inexpensive, typically less than $100 per tooth. If more complicated surgery is in order, the cost may double or even triple.Why won't my canine teeth grow in? ›
Typically, any tooth becomes impacted because it doesn't have enough room. Since wisdom teeth and canines grow in after incisors and first molars, the teeth may already be overcrowded, leaving little to no room for the incisors to erupt.Can teeth shift as you get older? ›
As you age, you may begin to experience a loss of bone or bone density – and your teeth are no exception. This bone loss can cause your gums to recede, ironically making your teeth appear to be longer. Over time, ligaments, gum tissue, and bone start to weaken, causing teeth to shift more easily.How long does mesial drift take? ›
The average drift duration was 81.66 ± 70.03 days.How do you stabilize moving teeth? ›
Teeth that have become loose because of lost gum tissue can benefit from a new technique called dental splinting which attaches weak teeth together, turning them into a single unit that is stable and stronger than the single teeth by themselves. The procedure is most commonly performed on the front teeth.