Staining occurs on the outer surface (enamel) of your tooth. The crown is usually smaller in all dimensions than that of a second molar. Fillings and crowns that contain amalgam, particularly silver sulfide, can cause teeth to appear black in color. Your first molars appear around age 6, and second molars break through around age 12. 20 Interproximal cavities (historically defined by topography and treatment type as Black Class 2) are very common, and their restoration, performed using the techniques and materials indicated, is predictable and supported in the literature by. Enamel is the hardest tissue in your body and is mostly made up of minerals. On the jaw segment, Rich is far more an expert than I. 3) The buccal surface is divided into three cusps that are separated by mesiobuccal and distobuccal developmental grooves. I’ve contacted my dentist, waiting to hear back now. Viking skull with filed teeth as shown in a Belgian museum – photo by Hape662 / Flickr. A non-invasive treatment for cavities, silver diamine fluoride kills bacteria and arrests tooth decay on the spot. Shovel incisors. Vertical root fracture. People with groovy occlusal surfaces like you sometimes neglect brushing the tops well, as starchy foods can collect. 2. Tyrannosaurus rex had approximately 60 robust serrated teeth that were wide and dull compared to the flat and dagger-like teeth of other carnivorous dinosaurs. Craze lines are tiny fractures in the enamel of the tooth – its protective outside layer. But whatever it is is most likely just stain that is not damaging your teeth. which teeth do not show lingual taper. Possible complications from cavity fillings include: Infection : Sometimes a cavity filling will pull away from the tooth to which it is attached, creating a small space. 2 to 0. - Answered by a verified Dentist. Some of the most common causes include: tobacco use. (e) There may be a groove on the mesiolingual aspect of the crown. With increasing age they turn brown (20 years plus). Tooth injuries. Study with Quizlet and memorize flashcards containing terms like Which molars have the greatest morphological variance of all teeth?, Which molars includes the "cusp of Carabelli"?, Which molars present the most supplementary grooves? and more. Mandibular molar teeth usually have two roots in which there are commonly three or four root canals. CP:central pit. As a result, the staining molecules contained in the foods you eat cling to these grooves, resulting in dark lines that resemble tooth decay. Prevention Summary If the base of your tooth is black, or you have a dark color anywhere on your teeth, it could be a sign of underlying dental disease. Understanding and identifying these five types can provide guidance for treating cracked teeth. This bacteria combines with sugar to produce acids that dissolve the tooth's enamel, the hard surface that works as a protective layer against tooth decay. The root showed 46% with one foramen, 46% two foramina, and 8% three foramina. One possible cause of black spots on wisdom teeth may be tooth decay or cavities. Eight premolars are found in the permanent dentition, four per arch and two in each quadrant. 2 days ago · Tommy John Women’s Air Brief (5-Pack) — Our Pick. The causes of tooth fractures are not always obvious. Dental caries is a highly prevalent disease, especially among young children. Otherwise, black line stain along the gumlines or speckled black staining is typically from vitamins, smoking, or even swimming in a. Kraus (1951) proposed that homozygosity of a gene is responsible for a pronounced tubercle, whereas the heterozygote shows slight grooves, pits, tubercles or bulge. 53%) were. Pit and fissure cavity prevention starts at home. Any baby, infant, or toddler with teeth is at risk of getting cavities. Dental anatomy is a field of anatomy dedicated to the study of human tooth structures. The mesiodistal crown width is greatest on first molars and less on second molars. The groove is slightly deeper pulpally than the. 1,5,9 These three grooves may be connected to each other by the presence of an inconstant groove that, starting from theMandibular Molars. 38%) showed grooving, as well as LOA on both surfaces and 11 teeth (8. Since you are using your molars to chew and grind your food when you eat, they are always exposed to acids. tartar buildup on the tooth. 3 2. As a result, the staining molecules contained in the foods you eat cling to these grooves, resulting in dark lines that resemble tooth decay. Treatments for a black tooth. Class I. Oral bacteria causes tooth decay. Children are particularly prone to discoloration from too much fluoride. Once this is done, nails should gradually grow back normally. ( G. pain near your ear. . Wisdom Teeth Black Spot. - 6But as you get older, your mouth gets drier and your odds of tooth decay go up. The superficial black line on your molar can not account for a fashion a techniques the an infection. Finding something to help you quit, like nicotine gum or patches, is going to be. 5%). The complex pit and groove patterns on the occlusal surface of posteriors can put them at an increased risk of caries (Figure 17-7). Stain / decay: Most likely it is stain in the deep anatomical grooves. Business, Economics, and Finance. Because it’s bacteria, it needs plaque to grow so it tends to appear along the gumline and in grooves and spots where it is difficult to brush well or where food sugars tend to linger between brushing sessions. Your dentist may recommend a crown, root canal, or tooth extraction. your best bet for fixing your teeth. sensitivity to cold and hot foods and beverages. what does this mean? Dr. The black dental groove is also called by dentists "supra-gingival tartar", and appears very often in the places where saliva usually flows, such as on the inner surface of the teeth, or on the space between the teeth. where does the cusp of carabelli sit on the first maxillary molar. This is what you may notice as a groove. Dental sealants provide extra protection for the grooved and pitted areas by providing a smooth surface covering the fissured area. B, They are connected by a guiding groove that extends through the central groove. Children and adults can benefit from sealants, but the earlier you get them, the better. The complex pits and grooves patterns of the occlusal table of posteriors make them at a greater risk for. Moreover, the use of sugar in these beverages can promote bacterial staining of teeth. Teeth are made up of different. A 40. Extend the cavity margin until sound tooth structures obtained and no unsupported enamel remains. 4. Couldn't floss anything out. 6-0. The root trunk is shorter on first molars than on second molars; the furcation is nearest to the cervical line on the buccal of first molars. Hi, I've had these black lines at the back of my teeth for a few months now. Teeth take on the. Fossae form where grooves meet one another: If there are three, the fossa will be triangular; if there are four, the fossa will be four-sided (Fig 2-6). 5% of the groove patterns were different from its antimere. There are 3 types of molars: first molars. (See also Overview of Tooth Disorders . Edit: ok, I see what you are noticing now. The restorative material also provides thermal. But a black dot or spot may be a warning sign of tooth decay. 1. This makes them the perfect place for bacteria to bury in and create tooth decay. Canines are called “cuspids” because they have one cusp each. Based on anatomical location of carious lesion, Greene Vardiman Black (G. 1 Deciduous teeth. 2,4, 34 [At least 10% of the population have impacted teeth. Some people also get those stains on the grooves on the chewing surface of their teeth. Third molars will have even more secondary anatomic grooves, pits, and fissures. Relax for at least 24 hours after the extraction. These black lines on teeth are simply a natural kind of tartar,. 2. There are ____ teeth in each arch of the primary dentition. The first maxillary molar is the most significant tooth of all maxillary molar teeth. “Black line stain” is an extrinsic stain, meaning it’s on the surface of the tooth and can be more easily removed than if it was coming from inside of your tooth. Here's why sealants are helpful: The chewing surfaces of back teeth are rough and uneven because they have small pits and grooves. More Dental Traits Connected to Native American Heritage. The cusps are almost equal in size. After the cleaning, I asked if the dentist if saw anything on the x-ray. A yellow, orange or brown build up of teeth indicates calculus, which occurs due to plaque films, formed from bacteria. However, it is sometimes recommended for children who develop cavities. Dental sealants prevent 80% of cavities over 2 years in the back teeth, where 9 in 10 cavities occur. The deep groves in our molars and premolars are there to provide traction as we chew. Decay is diagnosed on the incisal edges of the anterior teeth and the cusp tips of the posterior teeth. Dark lines in the grooves on the chewing surface of your teeth are stain. These spots can either appear black or brown. 6 Ibex (Capra ibex) Commonly found only in the mountains of Europe, Asia, and northeastern Africa, the wild ibex, with its impressive horns, can weigh between 110 and 220 pounds (50 and 100 kilograms). Discoloration may be prevented in future litters by avoiding giving certain medications to the pregnant bitch. There are products on the market for the treatment of black dental groove that affects the enamel ofSymptoms may include chewing and/or temperature sensitivity, or even a twinge when eating something sweet. which teeth have lingual grooves. ; Most of the experts say that third molars are smaller mesiodistally than second molars, a couple say they are the same, and one says that third molars are actually larger than second molars. Infection - eg, candida, dermatophytes, pseudomonas, herpes simplex. Mandibular 1st Molar: - 3 facial cusps and 2 facial grooves - Roots widely separated and relatively vertical. Sealing these teeth as soon as they come through can keep them cavity-free from the start, which helps save time and money in the long run. Black was born near Winchester, Illinois on August 3, 1836 to William and Mary Black. They’re the result of a lifetime of use, sometimes abuse, and often heredity. I'm a hygienist and a lot of people have staining on those areas. Specific tooth structures that occur with some frequency on teeth within a class have been assigned specific names. The crowns of the molars are shorter cervico-occlusally than those of the teeth anterior to them, but their. Have your dentist check and make sure they are not cavities. The development, appearance, and classification of teeth fall within its purview. As a result, they're harder to. Well, biting forces are not the only thing that cause these grooves to deepen…. This area helps the gums stay attached to the surface of your teeth. The bacteria produce acids that can cause tooth decay. General morphology • From buccal aspect, crown resembles maxillary canine • except that mesial slope is longer than distal slope • Distinct depression on mesial surface, extending from cervical half of crown to root bifurcation • mesial developmental depression / fossa. premature birth or low birth weight. The hypocone is sometimes dramatically smaller than the other cusps or even totally absent. They contain caffeine, which stains the teeth to brown or black color. First of all, you might want to consider how widespread the “stain” appears. Lower third molars (M 3) tend to be smaller and more crenulate than first molars, with more irregular cusp positioning relative to the major crown axes. In addition, cavities appear dark brown or black. “4+” was the most common and “5y” was the least common pattern for mandibular second molars. Multisurface restorations in molars and premolars are the most common type of restoration. External causes. Molars are especially prone to staining due to the pits and fissures that make up their biting surfaces. The milk teeth are white, and the permanent teeth (which erupt at 2 ½ to 5 years of age) that replace them are cream-yellow. Look a the color of the horse's teeth. The color of a horse's teeth provide a general clue as to horse's age. It could be that the black lines themselves have nothing to do with the diagnosis. This could be the cavity. gum. As such, it is recommended to start with small stiff stainless-steel hand files (i. 2) The enamel is uniformly in thickness. It can be a major distraction that impedes your ability to focus, sleep and act like a decent human being. Can't take pictures cause I have to get to bed. The. The vertical order of these cracks, from top to bottom, signifies the general prognosis for a particular crack. Because of covid-19 I don't know if I can or should go to the dentist. Understanding and identifying these five types can provide guidance for treating cracked teeth. This means they have more exposure to wear and. Figures 11-1 through 11-18 illustrate the maxillary first molar from all aspects. Some of the primary teeth are found to be missing at age 4, and by age 6, as many as 19% may be missing. BONUS FACT: Cats have 26 baby teeth and 30 permanent teeth. . When discoloration affects an entire tooth, it is more likely a stain rather than a cavity. Pain associated with chewing. Study with Quizlet and memorize flashcards containing terms like Which grooves radiate out from the central fossa in a Mandibular Second Molar?, Which cusp is the largest and longest on a Mandibular Second Molar?, Which cusp may be absent on a Mandibular First Molar? and more. Based on where a cavity can form, there are three types of cavities: Pit and fissure cavities. ; Due to the variability in the size of third molars, all of these are true possibilities. ; Black: Iron. For those who suffer from this problem of black dental grooves with black stains on the teeth and especially on the molars, it is important to know the solutions. A cavity is an area of tooth decay caused by bacteria. update image: what are the black lines on my teeth (molars) Just looks like stained grooves! Can become incipient lesions though (the earliest stage of a cavity) so making sure you’re brushing the tops of your teeth thoroughly. Mandibular molar crowns are much larger than. When compared to the use of fluoride alone, sealants are. Your molars have deep grooves and crevasses and over time, food debris, bacteria, and plaque can collect in them. These are located in the occlusal surfaces of molars and premolars, the occlusal two-thirds of the buccal surfaces of molars, the lingual surfaces of upper incisors, and occasionally in the lingual surfaces of upper molars. molar and a fragment of the crown of the opposing tooth in a lateral position, with a morsel between the teeth); B – final closing phase of the mastication cycle (the right mandibular first. The occlusal outline of the crown is more oval than rectangular, although the crown usually resembles that of a second molar. The teeth are covered by a thin outer covering known as the enamel. These grooves often terminate in a buccal pit which can be prone to caries. ) If there are no symptoms then don't worry about it. Roots - 3. ) If there are no symptoms then don't worry about it. Once you are done needing it, get a good cleaning and they will polish it off. Black teeth can be a symptom of underlying dental disease that shouldn’t be ignored. Cavities need treatments, usually fillings, or they can continue to grow. Events January. Many cats have one or more teeth missing. 1. A toothache is one of the most common signs of a cavity developing. Brown spots or discoloration can have many causes. A dead tooth may be grey or black. Fissured tongue is a benign condition affecting the top surface of the tongue. FIGURE 5-5 Ventral surface of the tongue. Various foods and beverages today lead to the staining, including red wine, coffee, tea, soft drinks, and dark sauces. Various foods, drinks, and habits can stain your teeth. Tooth Stains. These teeth have lots of grooves, pits and crannies, and multiple roots that can collect food particles. Make sure to brush your teeth twice a day for at least two minutes, especially after large or otherwise sugary meals. Eruption: 6 to 7 years. Fig. Unfortunately, many of these pits/grooves are so deep and narrow that they can't be cleaned, even if you brush multiple times a day. Fruits such as blueberries and blackberries are also. Because they are bigger, they are the teeth that you use to chew and grind your food. , 5 cusps with Y fissure (Y5), 5 cusps with. They’re made of ceramic materials and resist stains better than composite veneers. It can be especially difficult to successfully clean these areas out with a tooth brush. 2. 10. If you notice a space between your tooth and your cavity filling, visit a dentist as. 5. . Treatments for a black tooth. If properly cared for, a cat’s permanent teeth should last their entire life. Lower. • Baby teeth save space for permanent teeth. )Tooth formation begins before birth, and the teeth's eventual morphology is dictated during this time. On January 5, there was a shootout outside DJ Khaled's The Licking Restaurant in Miami, Florida, while filming a French Montana music video. Results from in-office procedures usually last around three years. There. • Other teeth with pits and grooves also might need to be sealed. The 2024 edition of ICD-10-CM K08. This breaks down to two pairs of incisors, one pair of canines, two pairs of premolars, and three pairs of molars on each jaw. This is in contrast with Old World Anthropoids, including gorillas, chimpanzees, bonobos, siamangs, gibbons, orangutans, and most humans, which share a dental formula of 2. The causes of tooth fractures are not always obvious. Richard Reinitz answered 41 years experience Probably nothing: Dark lines can mean a cavity. They’re almost always harmless; however, they’re not visually appealing. The horse´s cheek teeth are the teeth at the back of the mouth. 1. Distinguishing between M 1 and M 2 can be difficult. The buccal surface is divided into three cusps that are separated by mesiobuccal and distobuccal developmental grooves. e. And the effectiveness of different bleaching. Molars (pt. What is a fissure sealant? A fissure sealant fills the deep grooves on the surface of the teeth. For instance, food particles can become trapped in these grooves. What do cavities look like on molars? Cavities on molars tend to look like small, black, or brown spots. It is defined as a cavity that is present on the proximal surfaces of premolars and molars. 10) Mandibular 1st Molar: Right-Left: - Distal cusp is smallest facial cusp. The onset of caries on these surfaces takes place soon after their eruption, and the permanent first molars, followed by the second molars, remain the sites in the dentition which show the highest caries prevalence. In addition, cavities appear dark brown or black. Dr Akash Tiwari of Maxfac clinic can remove the black tartar buildup during a dental examination and recommend proper brushing and flossing procedures to. Hi, I've had these black lines at the back of my teeth for a few months now. 15-3) are normally the largest teeth in the maxillary arch. 15%, and 0. Your molars are the sets of back teeth in your upper and lower jaw with grooves on the top. If your dentist thinks a crown is best, a filling material can repair the crack. For example, the maxillary first molar generally has five developing lobes: two major facial lobes (mesiobuccal and distobuccal), a mesiolingual lobe, one minor lobe (distolingual), and one rudimentary lobe, called the. Cavities located in pits or fissures. FIG. The upper back teeth (molars) are also slightly further forward than the lower back teeth when you bite. DMR:distal marginal ridge. (Triadan 06’s to 11’s) There are 24 cheek teeth (molars and premolars) in an adult horse. However. Other possible causes of black spots on wisdom teeth include trauma, stains from food or drink, or natural developmental grooves in the teeth. The mandibular second molar resembles the mandibular first permanent molar, except that the primary tooth is smaller in all its dimensions. 8%) and the least affected was the upper right permanent molar (12. Pit and fissure cavity prevention starts at home. Mar 25, 2011. A dental cavity forms when plaque, a sticky bacterial film that builds up inside the mouth, solidifies and creates an area of decay. - 0. The most posteriorly placed posterior teeth of the permanent dentition. The clinical appearance of carious lesions varies significantly, and discoloration in these occlusal depressions may be either white or dark. These same deep grooves in teeth can trap food and bacteria, increasing our chances of tooth decay. 05). the growths cause new symptoms, such as difficulty swallowing or talking. These holes tend to look like small black or brown spots on your teeth. The enamel is translucent, while the major […] More Dental Traits Connected to Native American Heritage. More Information. If you or your child are taking multi-vitamins, you may notice something called “black line stain” start to gradually build up. Black's classification of cavities. Stage 1: Initial demineralization. Mandibular second molars with “+” groove pattern in 33% of population and “Y” groove pattern in 67% of population were recorded. The enamel covers the crown of the tooth, which is the part that is visible above the gums. Rinse and dry your teeth. Ask your dentist to pumice off the stain. Grooves occlusally or axially adjacent to fissures are often surfaced with stained pellicle. 2. ; On January 7, YoungBoy Never Broke Again married his girlfriend, Jazlyn Mychelle. Stains are either on the surface of your tooth or inside the tooth enamel. He said everything looked fine. Outline form defines the external boundaries of the preparations. Genetics. Some of the main ones are: Large fillings that put pressure on your teeth and weaken them. Class II: The buccal groove of the mandibular first permanent molar occludes posterior to the mesio-buccal cusp of the maxillary first molar. These teeth varied in shape and purpose. Incisors. Cavities are decayed areas in the teeth, the result of a process that gradually dissolves a tooth’s hard outer surface (enamel) and progresses toward the interior. groove that connects the buccal surface to the central occlusal pit. The tooth has four well-developed cusps and one accessory or supplementary cusp called the cusp of Carabelli. Mandibular second molars have only one buccal groove that separates the mesiobuccal from the distobuccal cusp. The primary teeth are organized in two arches: the maxillary (upper) arch and the mandibular (lower) arch. Since restaurants rarely skimps on rich ingredients like butter and salt, some researchers now say that "sit-down" restaurant food is nutritionally no better than fast food. The primary dentition constitutes the first teeth to erupt in the pediatric patient. No statistical difference was observed between groups in the. In general, the characteristics of a mole that makes it more likely to be worrisome for cancer include: 1. What does this mean? 1 doctor answer • 2 doctors weighed in Dr. Meanwhile nails should be kept short and dry, and irritants and trauma avoided. 2 The line of occlusion is a smooth (catenary) curve passing through the central fossa of each upper molar and across the cingulum of the upper canine and incisor teeth. Especially if it’s in one of the deep grooves/pits of a back tooth. Because roots are seven times softer than enamel, an “undercut” can form. It serves as an excellent record of maternal and fetal health, reflecting the prenatal, perinatal, and postnatal health and diseases. Your dentist can usually remove a small amount of tooth around this area, removing the staining and/or decay and placing a some tooth. Between mandibular first and second molars, which has three buccal cusps (mesiobuccal, distobuccal, and distal)? (buccal view) mandibular first molar has three buccal cusps. It may be as simple as some bond material that got on other teeth when he air thinned it. 1. 5% of subjects had Cusp of Carabelli on first molar and 68. It describes caries based on the anatomical location on the tooth. Potential signs/symptoms that you may have tooth decay include: Temperature sensitive to hot/cold. 11-35A and B) and maxillary canines. Usually the extra dimension. Chapter 15 Molars OBJECTIVES • To understand the lobe formations of the crowns of molars • To compare the formations of first, second, and third molars • To. 1. Because of covid-19 I don't know if I can or should go to the dentist. Should sealants be put on baby teeth? Your dentist might think it is a good idea, especially if your child’s baby teeth have deep pits and grooves. V . ] Genetic factors – The baseline color of a person’s teeth may naturally be more yellow, brown, or gray, or relatively lighter or darker, than other people due to their particular genetic. [1] He is also known as the father of operative dentistry. 5. As discussed above, if this plaque build-up around gums is not eliminated by brushing and flossing, it will calcify and harden into tartar, also known as calculus. Generally speaking, the maxillary molars have large crowns with four well-formed cusps. We would like to show you a description here but the site won’t allow us. Irregular borders or. Cavities located in pits or fissures. 2 Root morphology. They can form on the smooth sides of teeth, in the grooves of teeth, or on the surfaces of tooth roots. The roots of these teeth are double the size of the tooth. 2. Few secondary grooves are on the occlusal surface of a maxillary first premolar. GameStop Moderna Pfizer Johnson & Johnson AstraZeneca Walgreens Best Buy Novavax SpaceX Tesla. Vertical root fracture. Ulta: Up to 40% off makeup, fragrance, skin care and more in stores and online through Nov. Teeth normally range in color from white to whitish-yellow and whitish-gray. What we like: Our pick for. Broken/chipped tooth. A top reason you see your teeth turning brown is due to staining from the food and beverages you enjoy consuming. Class I. The hole can also collect stains or food debris, which is why it may look brown. In 1. Some cats gain tartar build-up on their back teeth. 9 may differ. According to MediLexicon, the cingulum of the tooth is a U-shaped ridge located on your upper central and lateral incisors and on the upper cuspids (also called canines) on the tongue-facing side of the tooth. The ASUDAS scores for radicular grooves were 60. At the base of the tooth, the root held the tooth in. The permanent premolar teeth are placed between the anterior teeth and molars. Permanent Maxillary 1st premolar. The development of the permanent dentition is discussed in Chapter 6. Mar 3, 2015 • 417 likes • 144,712 views. It runs mesiodistally (from the front of the tooth to the back) and serves. Last Updated: January 9, 2023 Medically Reviewed By Colgate Global Scientific Communications Have you noticed black lines in the pits of your molars? Are you experiencing tooth sensitivity in your back teeth? This could be because a prime location for tooth decay to occur is in the pits and fissures of your teeth. It’s normal for a person’s teeth to gradually take on a generalized yellow or brown coloration as years and decades pass. From the distal view (Fig. e. GameStop Moderna Pfizer Johnson & Johnson AstraZeneca Walgreens Best Buy Novavax SpaceX Tesla. Last Updated: January 9, 2023 Medically Reviewed By Colgate Global Scientific Communications Have you noticed black lines in the pits of your molars? Are you. The maxillary first premolar is the first posterior tooth in the maxillary dental arch. Most corals will have grooves or lines radiating out from the axis. Comprised of 20 teeth, they are labeled based on an alphabetical system rather than the numbering system used for permanent teeth. They are the sixth, seventh, and eighth teeth from the mid-line. They are the sixth, seventh, and eighth teeth from the mid-line. It is often not possible to distinguish undecayed, stained occlusal grooves from decayed stained grooves by appearance or by the presence or absence. These grooves form a cross, dividing the occlusal portion of the crown into four nearly equal parts. Up to 45% of all extracted teeth are mandibular first molars. CryptoSummary. To identify the following anatomic structures, reference will be made to representative drawings of various teeth seen in figures throughout this. They are not succedaneous teeth, because they have no predecessors, they erupt behind the deciduous molars. Fortunately, there are multiple ways to correct black teeth, from simple lifestyle changes to intervention from a dental professional. The main functions of the teeth include: chewing food into a bolus that can be easily swallowed for further digestion. Created for people with ongoing healthcare needs but benefits everyone. Sealants are not. Dentistry 32 years experience. Enamel is the hardest tissue in your body and is mostly made up of minerals. Pits on the enamel of your teeth may look like white spots, pits, or even grooves that are visible. an injury to the affected tooth. They are the largest and strongest teeth in the mandibular arch. This is considered to be the normal relationship. This is a hardened shell that is known to be the hardest tissue in the human body. That is, craze lines have a good prognosis, whereas a vertical root fracture has a very poor prognosis. Martyr-X • 3 yr. But the truth is, dark spots appear due to tartar buildup, also known as dental calculus. This process works so well you will be amazed at how nice your plastic part will look. 67%) and 13. Teeth can be filled with porcelain, gold, silver, composite resin or amalgam, which consists of. Such a lump may be caused by a gum or tooth abscess or by irritation. Habitual smoking makes the surface of the teeth stained to brown or black. See morePrevention Summary If the base of your tooth is black, or you have a dark color anywhere on your teeth, it could be a sign of underlying dental disease. But sometimes the biting edges of the upper teeth bite directly onto the biting edges of the lower teeth. 3% in the lingual area and 16. K08.