Currently, the primary way to treat a cavity is to excavate the decay and the surrounding area. If you look closely at a lower molar, on the cheek side, you'll see two lobes which come together with a small groove between them. D. oral or buccal cavity. What is the minimum number of surfaces a class II restoration could involve?Buccal definition: . 5 mm. the to apexthefromCavity preparation on the lingual surfaces on maxillary incisors. But there’s this brown spot on my teeth…do you think she missed it? Or did she intentionally leave it alone? Does it look harmless? 5 upvotes · 1. Is a buccal pit a cavity? Buccal pits mark the cervical termination of the mesio-buccal groove on mandibular molars. Angle formed by the junction of three surfaces. Positioning the gold within the cavity by hand pressure, however, should precede mechanical condensation. Demonstration of the preparation and filling of a Class I buccal pit in a mandibular molar. 263. Make sure to brush your teeth twice a day for at least two minutes, especially after large or otherwise sugary meals. A, Ideal outline includes all occlusal pits and fissures. Decay is found in the pits and fissures of the occlusal surfaces of the molars and premolars and the buccal and the lingual pits of the of the maxillary incisors. has a buccal pit which is susceptible to caries , the buccal pit has a triangular shape, due to inclination of mesiobuccal and distobuccal cusps towards the buccal groove, so we should be conservative in our cavity preparation and make triangular outline form, the buccal pit located at the center of the triangle. It refers to a point on the cheek side of molars, typically lower molars. once outline form, primary resistances and primary retention form are complete what could remain ? caries so make sure you remove them. The time that it takes to place a buccal pit or casting repair when using E-Z Gold can be equal to that of a direct composite or amalgam, including anesthesia, rubber dam, cavity preparation, placement, and finishing. This process leads to what we commonly call a cavity. 11. 51 - other international versions of ICD-10 K02. It refers to a point on the cheek side of molars, typically lower molars. the occlusal grooves were conditioned with GC Cavity Conditioner (20%. Foramen caecum molare The Foramen caecum molare (F. The amalgam in the second molar is sound. He should eat up the cost not you. (50) this convergence done on buccal and lingual wall fig 7. Class IV. A lower right third molar with an occlusal amalgam and buccal extension would be an OB-A, #32. Answer: (A). مركز بسمات التخصصي لطب الاسنانبغداد - حي الجامعةFacial. 14K views 3 years ago. Depth of the cavity 1. Normally, the mandibular first molar is the largest tooth in the mandibular arch. See full list on mayoclinic. . Restricting depth of penetration into dentin to a maximum of 0. The earlier tooth decay is identified, the better your chances of preventing a cavity. ) Bacteria and debris build up on tooth surfaces, and the bacteria produce acids that cause decay. Class I, buccal pit, and class II (MOD) cavity preparations for amalgam restoration in mandibular first molarAt first, class I cavity preparation was prepare. All the four quadrants carry equal number of teeth in the absence of any pathology. It has five well. Depending on cuspal incline, depth of prepared external walls is 1. Dental sealants were introduced in the 1960s to help prevent dental caries, mainly in the pits and fissures of occlusal tooth surfaces. C, the bur should be perpendicular to the occlusal surface. Tooth decay occurs when bacteria in your mouth create acids that damage the enamel on the surface of your teeth. Had a check up last week. A full-thickness flap, based. A buccal. 37. Class II cavity. I had a dental check up last week and my dentist said everything looked fine, I just started having mild tooth pain and when I checked in the mirror I saw a small hole on my bottom molar. The inside of your mouth contains your: Teeth. 5mm pulpal depth measured at central fissure. The symptoms—tender, painful teeth—appear late. And the dentist uses a drill, laser, or air abrasion instrument to remove the decayed part of the tooth. bifurcated – Single tooth with two roots. Correct diagnosis is crucial, distinguishing le. Occlusal two-thirds of the lingual surfaces on maxillary molars including the lesions on Carabelli’s tubercle ( Fig. . 1 - how good a job the dentist did that day 2 - how good (or bad) someone's daily oral hygiene is 3 - how harmful their diet is to their oral health 4 - Any genetic or disease-induced predisposition for decay/gum disease/etc 5 - Local factors such as how heavy their bite is. A. Using a small round bur or #330 bur, entry is made through the center of the defective pit. Buccal definition: . University of Aden Faculty of Dentistry Department of Conservative Dentistry Conservative Dentistry Final ExaminationDefinition: These are pit and fissure type cavities that involve the occlusal surfaces of molars and premolars, the occlusal 2/3 of buccal and lingual surfaces of molars, and the palatal pits in maxillary anterior teeth. They are most common on the back teeth. These parts work together harmoniously to help with chewing, speaking and breathing. Point angle. The buccal cavity provides a highly vascular mucous membrane site for the dministration of drugs. In mandibular molars, enamel dramatically increases in thickness at the buccal pit area and progresses occlusally due to an extensive concavity in the buccal dentinal core, In order to comply with the principles of operative dentistry, this anatomic variance dictates that, if the ultimate restoration is to be placed in dentin, the axial wall of a Class I buccal pit. Class 1 cavity preparation comprises all pits and fissures cavities. 6K views•68 slides. While you finish a class I cavity, the enamel is sound but you notice a thin brown line in the dentine and on the dentino-enamel junction,. Also, visit your dentist at least once every 6. 5. Class I cavity of palatal pit of upper incisors •There is a non coalesced pit in the palatal surface of the upper incisors , incisal to the cingulum with two small grooves radiated. 4. Bucca is Latin for cheek; the buccal cavity refers to the part of the mouth between the teeth and cheeks. A defective buccal pit can be defined as a buccal pit in which the. So far, the oral mucosa has been. Resistance form :This article presents evidence-based clinical recommendations for the use of pit-and-fissure sealants on the occlusal surfaces of primary and permanent molars in children and adolescents. XG has been found suitable for buccal delivery of drugs. 217. Decay is diagnosed on the proximal (mesial or distal) surfaces of premolars and molars. Class I. Distal caries(D)- caries on the back ‘interproximal’ surface. Eisner, in Oral and Maxillofacial Surgery in Dogs and Cats, 2012 Mandibular first molar tooth in the dog. When found in pregnant women, pyogenic granulomas are referred to as a ‘pregnancy epulis’. the cavity width i. 166. Unilateral buccal space masses often pose a diagnostic challenge owing to the diversity of tissues in the area. dry mouth. Figures 11-1 through 11-18 illustrate the maxillary first molar from all aspects. Sublingual administration involves placing a drug under your tongue to dissolve and absorb into your blood through the tissue there. If you look closely at a lower molar, on the cheek side, you'll see two. • Tooth Preparation on Occlusal Surface with Buccal or Lingual Extension. Pit and fissure caries correspond to about 90% of the caries of permanent posterior teeth and 44% of caries in. V. Entirely lined with mucous membranes, the mouth’s moist environment facilitates digestion. And last but not least –Buccal. Keep your mouth moist to slow the cavity's progression and rinse away food particles that could make decay worse. A buccal or lingual pit restored with composite would be a B-C or L-C, followed or preceded by the tooth number. Among the structures of the dental arch, the perma-. The mesial and distal walls run respective ends of the gingival wall. The alimentary canal of the Pectinibranchia presents little diversity of character, except in so far as the buccal region is concerned. [2] Pits also vary in how they occur on a tooth. 11. mesial occlusal pit to the central occlusal pit, there is a groove separatingthemesialcusps. The treatment includes tooth fillings, root canal treatment, or tooth extraction, depending on the extent of the damage. I have multiple cavities that need filling and I am scared of the the dentist drilling more tooth out than needs to be and…Lingual aspect -Similar to the buccal aspect but in a reverse manner and with lingual convergence. Pain when the tooth is tapped. has a buccal pit which is susceptible to caries , the buccal pit has a triangular shape, due to inclination of mesiobuccal and distobuccal cusps towards the buccal groove, so we should be conservative in our cavity preparation and make triangular outline form, the buccal pit located at the center of the triangle. What is a buccal pit in dentistry. teeth and the buccal and lingual pits of all teeth. Orientate the long axis of the #330 bur at right angles to the buccal surface of the tooth. He used. The buccal cavity definition refers to the cavity or space that begins at the lips and ends at the back of the throat, and is located at the upper end of the alimentary canal. It looks well beyond the observing point imo. Summary. Part of running a business plus he egged you on. All walls are extended just enough to eliminate defective enamel and dentin. Ninth Ave. Normal Tooth Anatomy: A "buccal pit" is a variation of normal tooth anatomy on lower back teeth. Composite Restorations. It is nearer to the mouth opening. Class V. Conclusion: The most appropriate nomenclature for the buccal groove of the LM1 is the anterior buccal groove. Our Smile Certified experts happily serve patients from Butler, Cranberry Township, Mars, Pittsburgh, Butler County, and all. This type of decay is also known as root decay. Buccal – The portion of the tooth in contact with your cheek. The buccal pit often has to be filled because a. FIGURE 5-6 Ventral surface of the tongue and the floor of the mouth. Common spot to get a cavity. A classification system to categorize the location, site of origin, extent, and when possible, activity level of caries lesions. However, there are many other symptoms that indicate it is a cavity rather than a stain: Visible holes in the teeth. Class VI. A buccal pit is a prominent point-like depression that appears at the cervical end of the mandibular molar developmental grooves. • Simple Occlusal Cavity CHAPTER 17 Classes I, II, and VI Amalgam Restorations • Compound Occlusal Cavity • Occluso-Buccal • Occluso-Palatal / lingual • Complex Occlusal Cavity • Buccal Pit FIG 17-14 Mandibular molar. . FIGURE 5-4 Lateral surface of the tongue. 76. The occlusal cavity may connect to the buccal or lingual cavity, or they might stay as two independent simple cavities. The other possibility is Steinia (e. 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. This is achieved by sliding the ball end along the suspect pit or fissure and a dentin cavity is detected if the ball enters the opening of the cavity and in the opinion of the examiner the base is in dentin (in pits or fissures the thickness of the enamel is between 0. These planes should approximate the cusps of a molar 1 mm to 2 mm toward the center of the occlusal center or the width of the incisal edge of the anterior teeth. TRIGEMINAL NERVE (FIFTH CN) When discussing the function of the oral cavity, probably the most important nerve is the trigeminal. In many cases, the pit or fissure became less retentive the more the tooth was probed. Infection spreads to this space through the root apices of the maxillary teeth, usually the canine. sheepish. 1 Molars. Normal Tooth Anatomy: A "buccal pit" is a variation of normal tooth anatomy on lower back teeth. a. 10. The gingival wall is placed at or slightly occlusal to the height of contour of the tooth. Buccal : The tooth’s cheek side, also called the facial surface when referencing front teeth. This e-Anatomy module contains 110 illustrations on the oral cavity, the mouth, the tongue and the salivary glands. 51 became effective on October 1, 2023. Had a check up last week. Small occlusal lesions, buccal and lingual pit cavities, are better studied clinically, as radiography plays a small role in the detection of these lesions. Midline union of the mandibular. Steinia sphagnicola) which has a similar buccal cavity,. Literary usage of Buccal cavity. The decay is removed from the tooth and the filling is then bonded into placed and adjusted so there are no rough edges. 245 bur. Click the card to flip 👆. . Simply put, we can define a cavity as a hole in a tooth that forms when decay is left to spread. Not an emergency though. The buccal pit often has to be filled because a cavity has formed there. Another issue increasing the risk of caries in this population is a low percentage of pit and fissure sealants; sealants in permanent teeth were the highest score per mouth for one third of evaluated children (34. . Occlusal two-thirds of the buccal surface of the mandibular molars ( Fig. 5. 5 A small but obvious occlusal cavity in the central fossa of a permanent first molar (arrow). What is a buccal pit in dentistry? Buccal pit is an anatomical reference. Code. Over 100 years ago, Dr. However there was also a second cavity (second photo, second tooth from the left). For shallow or moderately deep pit-and-fissure lesions, various treatment options are available: (1) noninvasive treatments (e. Black’s Classification of dental caries is the standard method used in identification of carious lesions according to its location on the tooth surface. eating disorders, such as anorexia and. Palate In this article, the causes of a palatal swelling have been separated from other areas in the oral cavity becausebuccal cavity: [TA] that part of the mouth bounded anteriorly and laterally by the lips and the cheeks, posteriorly and medially by the teeth and/or gums, and above and below by the reflections of the mucosa from the lips and cheeks to the gums. From the occlusal aspect, the inequality of. The lymphatics. 0. They may be manifest as a very slight depression, a moderately conspicuous cavity, or a large deep pit in the middle of the buccal surface. 7. A gizzard is present in a few forms. AKA "smooth surface decay". buccal pit b. I’m very worried and paranoid now about my teeth. celestial body. Finishing cavity walls. If the patient presents with buccal pit carious cavity, the orthodontist may. Three buccal developmental depressions. 5. C. The physical penetration of the surface with an explorer converts a subsurface lesion to a frank cavity, with no hope of caries reversal. 0149). Is a buccal pit a cavity? Buccal pits mark the cervical termination of the mesio-buccal groove on mandibular molars. Access cavity in lower incisor which shows a) initial identification of the lingual canal underneath cingulum; b) initial negotiation of the canal with a size 6 file and c) successful obturation. 23,24 Sealants. Rinse your mouth. a branch of the external carotid artery, which supplies the floor of the oral cavity, the sublingual gland, and the tongue. Tooth #24 has an M cavity. Bad breath. Depth of the cavity 1. K02. Class I cavity preparation of Buccal pit Class I cavity of buccal pit of lower first molars The lower first molar has three cusps buccally: mesiobuccal , distobuccal and 4. Pit and fissure sealants are highly effective at caries prevention, reducing the incidence of dentinal caries over a four year period by greater than 50%. Distal : The tooth’s back side. "blank" is the cavity preparation step that allows. 13 Retention (retentive) pins placed in tooth structure for retaining and supporting a restoration. The other end of the pin grips the restorative material. 025) indicates that the frequency of pits is significantly higher. Of, relating to, or lying in the mouth. V. It refers to a point on the cheek side of molars, typically lower molars. Two techniques of composite resin filling were used to elevate the floor: filling the cavity without layering or with three 1-mm thick layers. A. I had a dental check up last week and my dentist said everything looked fine, I just started having mild tooth pain and when I checked in the mirror I saw a small hole on my bottom molar. 2mm into dentin 24. External outline form -which dictates the external perimeter of the outline form. buccal meaning: 1. 5 to 2 mm The depth must be uniformly Use fissure bur to make out line form of the cavity The buccal and lingual wall should be convergence occlussaly , its done by tilted the bur 5 degree under the cusp to establish the retention form The width of the cavity ¼ of the distance between buccal and lingual cuspsBuccal pit cavity Ø The outline of these cavities usually describes a triangle with its base faming the gingival wall and its sides forming the mesial and distal walls. The attached image shows a person’s cheek being pulled back with a dental mouth mirror. That's called a buccal pit, very common. Interproximal – The portion of your tooth that touches a neighboring tooth; Proximal – Closest to the center of the body; Now we can move onto the classes of cavity: Class I – This form of cavity forms in the occlusal crevices and pits. Retention form: is the shape of the cavity that permits the restoration to resist displacement through the tipping or lifting force. Some people have groovy teeth with a pit on the side of their teeth, like yours. Once a small cavity has been opened, the location of the. She was also very surprised with this since she didn’t find anything wrong with the enamel. 3. buccal cavity (pharmacology) Administered in the mouth, not by swallowing but by absorption through the skin of the cheek; often by placing between the top gum and the inside of the lip. Pit and fissure cavity prevention starts at home. position in the arch d. It refers to a point on the cheek side of molars, typically lower molars. The 2024 edition of ICD-10-CM K02. Demonstration of the preparation and filling of a Class I buccal pit in a mandibular molar. . The mandibular right cuspid has a D cavity. the to apexthefromVieira RS, Martinhon C, Rodriques C. White spot lesions [initial caries] on pit and. An occlusal cavosurface bevel is contraindicated in an amalgam cavity preparation. buccal surface of the molars, buccal branch of the facial nerve. The buccal and lingual surfaces converge toward the occlusal. V. ~The shape or form of the cavity that allows adequete vision ~ removal of remaining caries. There is a non coalesced pit in the palatal surface of the upper incisors, incisal to the cingulum with two small grooves radiated. The buccal pit works by creating a low-pressure area around the wheels, effectively reducing the air resistance and drag. It consists of several different anatomically different aspects that work together. Buccal pits mark the cervical termination of the mesio-buccal groove on mandibular molars. 0 Carcinoma in-situ of the lip, oral cavity and pharynx. Any update ? Signs that it’s a cavity. 6. has a buccal pit which is susceptible to caries , the buccal pit has a triangular shape, due to inclination of mesiobuccal and distobuccal cusps towards the buccal groove, so we should be conservative in our cavity preparation and make triangular outline form, the buccal pit located at the center of the triangle. Smooth surfaces, can occur on the circumference of the tooth or in between the teeth. A cavity, also called tooth decay, is a permanently damaged area on the surface of your tooth, which may feel sticky. Treatment includes surgical excision and removal of the traumatic irritant (eg subgingival plaque). Having a dental exam will allow us to inspect the stained surfaces and determine whether or not your child's teeth need to be treated. The buccal space is an area of anatomic significance due to its small size and distribution of adipose tissue. 3. The oral cavity is separated from the nasal cavity posteriorly by midline fusion of the secondary palate and anteriorly by the approximation of the primary palate to these shelves . The time that it takes to place a buccal pit or casting repair when using E-Z Gold can be equal to that of a direct composite or amalgam, including anesthesia, rubber. Edward R. I’m worried because this looks like a really big cavity. 254K views•79 slides. shorter than those of the maxillary canine. Cavity Classification. It originates in the large semilunar or trigeminal ganglion, a group of nerve cell bodies. 36K subscribers. The maximum values of fluorescence loss (ΔFmax) and red fluorescence gain (ΔRmax) were calculated using QLF images. A clinical study reported the effectiveness of. 13a, c). These parts work together harmoniously to help with chewing, speaking and breathing. 7. 13 million in 2022 & is expected to grow at a CAGR of 9. Amalgam corrodes. Some ways in which sealants can help your oral cavity are: Protect teeth from dental caries. The lingual cusps are separated by a curved. My dentist ran her pick thru my teeth and showed me that they were catching. derived from. Yes, they can be cavities. Daniel Wolter answered. Study Resources. B. The initial glass ionomer materials were difficultBlack's classification system defines five classes of cavity (the sixth class was added later): As we mentioned previously, smooth surface cavities aren't as common, but they may be more serious than cavities that occur. Common spot to get a cavity. Class I cavities are those you can see. Deep margin [] is the phenomenon whereby, because of deep caries or severe structural defects, a cavity is lower than the gingival margin after removing caries or unsound dentin. Buccal pit cavity preparation (Oval- & Triangular-shaped) for composite restoration on mandibular molars (#36 & 37)- To learn about buccal pit cavity prepara. Demonstration of the preparation and filling of a Class I buccal pit in a mandibular molar. A sharp pinpoint depression where two or more grooves meet. They are the teeth most visible to the others during eating,. That means flossing at least once a day and brushing for two minutes two times a day. The sooner you treat a cavity, the better your chance for a predictable outcome and optimal oral health. . Prevention Brush with fluoride toothpaste after eating or drinking. CAVITY is an official word in Scrabble with 14 points. Here’s the typical procedure you can expect for a filling: Your dentist will dry the area, then they’ll administer a numbing gel. It is one of the easiest ways to describe carious lesions. Cavities are a common problem in children. 48. 2 Anatomy of the Crown of Molars and Premolars 2. This may still be true to a certain degree, but the procedure has become more efficient due to the use of E-Z Gold. lead foil from the radiographic film should be __. Class 1. Sensitive to moisture contamination during placement. In mandibular molars, enamel dramatically increases in thickness at the buccal pit area and progresses occlusally due to an extensive concavity in the buccal dentinal core, In order to comply with the principles of operative dentistry, this anatomic variance dictates that, if the ultimate restoration is to be placed in dentin, the axial wall of a Class I buccal pit. *Occlusal, Buccal, or Lingual pit and fissures. Height of contour on the buccal surface is in the occlusal third. affecting proximal surfaces of anterior teeth. They will also call out the tooth number which it relates to: Buccal caries (B)- caries on the outside surface of the tooth, the one facing the cheek. Figure 9 shows a buccal pit that. . Synonym(s): vestibulum oris [TA], buccal cavity , vestibule of mouthThe most widely used method to classify carious lesions is using G. Pit and fissure caries account for approximately 80-90% of all caries in permanent posterior teeth and 44% in primary teeth. Decay at these locations progresses rapidly. Cavities and tooth decay are among the world's most common health problems. Drink water. Study with Quizlet and memorize flashcards containing terms like What term is used to describe the process of removing damaged tooth structure and providing a secure place for restorative material?, A patient presents with dental caries in the occlusal fissures and buccal pit of tooth #30 (mandibular right first molar). -MKThe oral cavity, or more commonly known as the mouth or buccal cavity, serves as the first portion of the digestive system. inclined buccally and distally. Buccal pit cavity preparation (Circular-shaped) for composite restoration on a mandibular molar (#36) - To learn about G. Additional comment actions. The two distinct buccal cusps have no evidence of a distinct developmental groove. Class I. Nothing to worry about!. b. Black classification of carious lesions, sealants are placed on permanent molars as soon as they erupt to prevent: Class I caries; Class II caries; Class III caries; Class IV caries; Class V caries; Enamel sealants are generally applied on deep pits and fissures of the occlusal. A, Carious (or at risk for caries) facial pit. The occlusal surface exhibits too many grooves, buccal extension of these grooves extends to the buccal surface from between the mesiobuccal and the distobuccal cusps to end in the junction between the occlusal and the middle thirds in a non-coalesced pit termed the buccal pit. The subject of occlusal pit-and-fissure caries diagnosis elicits controversy and multiple opinions, depending on the clinician being questioned. air date:. (anatomy, dentistry, relational) Of, relating to, near, involving, or supplying the cheek. However, the shape of the cavity will be governed by the extension of caries, accordingly the outline of these cavities may be a rounded or oval in shape. . triangular ridge d. Figure 12. I floss every single. Here you'll find detailed procedural steps of Class I cavity prep (Buccal pits) for amalgam or composite restorations. Small hole on buccal pit (?). After the removal of the decay, the dentist cleans the cavity and prepares it for. Buccal pit cavity Ø The outline of these cavities usually describes a triangle with its base faming the gingival wall and its sides forming the mesial and distal walls. See Figure 2. Roots, the parts of the tooth below the gumline. In the human digestive system, the mouth is the upper end, or the beginning of the alimentary canal, which leads to the pharynx and to the oesophagus. The oral cavity, or more commonly known as the mouth or buccal cavity, serves as the first portion of the digestive system. A, Maxillary. Lingual pit is. pits and fissures b. V. Black’s Classification of dental caries is the standard method used in identification of carious lesions according to its location on the tooth surface. Black in the early 1900s. Study with Quizlet and memorize flashcards containing terms like GV Blacks Classification: Classified _____ _____ into groups according to their locations in permanent teeth; The same classification is used to refer to _____ preparation (the location of caries is a major factor in the design of the _____ preparation), Class I; Pits and Fissures on the _____,. Management of the caries process on occlusal surfaces of permanent molars has proven a major challenge. Palatal pit cavity preparation for composite restoration on a maxillary molar (#36) - Arabic عربي- To learn about buccal pit cavity preparation (circular-sha. Pain that moves. These acids begin to eat away at the tooth's enamel. Differences between Maxillary and Mandibular Incisors; There are a total of 12 molars in the oral cavity – 6 Maxillary and 6 Mandibular molars. The buccal pit often has to be filled because a cavity has formed there. I tell my patients to expect 3-10 years on average, depending on: 1 - how good a job the dentist did that day 2 - how good (or bad) someone's daily oral hygiene is 3 - how harmful their diet is to their oral health 4 - Any genetic or disease-induced predisposition for decay/gum disease/etc 5 - Local factors such as how heavy their bite is. Black originally devised five classifications, but a sixth was later added. The etiology is not entirely. The buccal mucosa, however, while avoiding first-pass effects, is a formidable barrier to drug absorption, especially for biopharmaceutical products (proteins and oligonucleotides) arising from the recent advances in genomics and. Radiographic detection of occlusal decay is not much better. Study Exam Chapters 23, 24, 26, 28 And 30 flashcards. They have sharp biting surfaces designed for shearing and cutting of food materials into small chewable pieces. The greater the retention of the explorer at the baseline examination, the more likely the control. 5 upvotes · 6 comments. Buccal and lingual walls parallel to each other and 90 degrees to the occlusal plane. 25. . CPT Code Assignment. Its chief structures are the teeth, the tongue, and the palate. Class I. FIG. buccal pit: a structural depression found on the buccal enamel of molars. The less common but painful erosive lichen planus typically affects the tongue or buccal mucosae on both sides.