Dental Science - Review Article

Diagnosis of

Sebeena Mathew, Boopathi Thangavel, Chalakuzhiyil Abraham Mathew1, SivaKumar Kailasam, Karthick Kumaravadivel, Arjun Das

Departments of ABSTRACT Conservative The incidences of cracks in teeth seem to have increased during the past decade. Dental practitioners need and Endodontics and to be aware of cracked tooth syndrome (CTS) in order to be successful at diagnosing CTS. Early diagnosis 1Prosthodontics, KSR Institute of Dental Science has been linked with successful restorative management and predictably good prognosis. The purpose of this and Research, KSR Kalvi article is to highlight factors that contribute to detecting cracked teeth. Nagar, Thokkavadi (Po), Tiruchengode, Namakkal (Dt), Tamil Nadu, India

Address for correspondence: Dr. Sebeena Mathe, E-mail: matsden@gmail. com

Received : 01-12-11 Review completed : 02-01-12 Accepted : 26-01-12 KEY WORDS: Bite test, cracked tooth syndrome, transillumination

racked tooth is defined as an incomplete fracture of the patient. Identification can be difficult because the discomfort C dentine in a vital posterior tooth that involves the dentine or can mimic that arising from other pathologies, such as and occasionally extends into the pulp. The term “cracked tooth , temperomandibular joint disorders, headaches, ear syndrome” (CTS) was first introduced by Cameron in 1964.[1] pain, or atypical orofacial pain. Thus, diagnosis can be time consuming and represents a clinical challenge.[3] Early diagnosis The diagnosis of CTS is often problematic and has been known is paramount as restorative intervention can limit propagation of to challenge even the most experienced dental operators, the fracture, subsequent microleakage, and involvement of the accountable largely by the fact that the associated symptoms pulpal or periodontal tissues, or catastrophic failure of the cusp.[4] tend to be very variable and at times bizarre.[2] The aim of this article is to provide an overview of the diagnosis of CTS. The ease of diagnosis varies according to the position and extent of the fracture. Mandibular second molars, followed by mandibular first molars and maxillary premolars are the Diagnosis most commonly affected teeth. The tooth often has an extensive intracoronal restoration. The pain may sometimes Diagnosing CTS has been a challenge to dental practitioners occur following dental treatments, such as cementation of an and is a source of frustration for both the dentist and the inlay, which may be erroneously diagnosed as interferences or high spots on the new restoration. Recurrent debonding of Access this article online cemented intracoronal restorations such as inlays may indicate Quick Response Code: the presence of underlying cracks. Website: www.jpbsonline.org Dental History

DOI: When eliciting the history from the patient, certain distinct 10.4103/0975-7406.100219 clues can be obtained.[5] There may be a history of a course of extensive dental treatment involving repeated occlusal

How to cite this article: Mathew S, Thangavel B, Mathew CA, Kailasam S, Kumaravadivel K, Das A. Diagnosis of cracked tooth syndrome. J Pharm Bioall Sci 2012;4:242-4.

 S242 Journal of Pharmacy and Bioallied Sciences Vol 4 August 2012 Supplement 2 - Part 2 Mathew, et al.: Diagnosis of cracked tooth syndrome  adjustments or replacement of restorations, which fail to Periodontal probing eliminate symptoms. The patient will give a history of pain on biting on a particular tooth, often occurring with foods that Periodontal probing helps distinguish between a cracked tooth have small, discrete, harder particles in them, for example, bread and a split tooth when the fracture line extends below the with hard seeds or muesli.[6] Besides pain on biting, the patient gingiva, thereby causing a localized periodontal defect. For will also experience sensitivity to thermal changes, particularly suspected cracks, careful probing must be performed to disclose cold. Patients with a previous incidence of CTS can frequently the presence of an isolated periodontal pocket. However, isolated self-diagnose their condition. Occasionally, there is sensitivity to deep probing often indicates the presence of split tooth, which sweets. It is also important to note that there can be instances predicts a poor prognosis. when the patient may also remain asymptomatic for a long period. Many dentists would have evaluated them without a Dye Test conclusive diagnosis. Patients who have an existing cracked tooth are likely to have other cracked teeth. Habits that might Gentian Violet or methylene blue stains can be used to highlight contribute to cracked teeth are clenching or grinding, chewing fracture lines.[7] The disadvantage of this technique is that it ice, pen, hard candy, or other similar objects. takes at least 2–5 days to be effective and may require placement of a provisional restoration. Placing a provisional restoration Clinical Examination undermines the structural integrity of the tooth and further propagates the crack. An additional disadvantage is that a The inability to visualize the extent of the crack through definitive esthetic restoration cannot be obtained. clinical exam alone is one aspect that leads to the complexity of accurately determining an endodontic diagnosis. Other Transillumination clues evident on examination include the presence of facets on the occlusal surfaces of teeth (identifies teeth involved in Transillumination is an important aid in locating the crack eccentric contact and at risk from damaging lateral forces), the whether it is incomplete, as in CTS, or a complete vertical presence of localized periodontal defects (found where cracks root fracture.[8] When performing transillumination, the tooth extend subgingivally), or the evocation of symptoms by sweet should be cleaned and the light source placed directly on the or thermal stimuli. Many authors suggest removing existing tooth. A crack that penetrates into the dentin of the tooth restorations and stains once the tooth has been localized to will cause a disruption in the light transmission under these further aid in the visualization of the crack. The use of rubber circumstances. Transillumination is probably the most common dam enhances the probability of visualizing these cracks by modality for traditional crack diagnosis. There are two drawbacks isolating the tooth, highlighting the crack with a contrasting to using transillumination without magnification. First, background, keeping the area free of saliva, and reducing transillumination dramatizes all cracks to the point that craze peripheral distractions. lines appear as structural cracks. Second, subtle color changes are rendered invisible. Transillumination with a fiber-optic light Visual Inspection and use of magnification will aid in visualization of a crack.[9]

Visual inspection of the tooth is useful, but cracks are not Bite Tests often visible without the aid of magnifying loupes. It can be occasionally detected. However, it is not always readily Symptom mimickers can be used to reproduce the symptoms apparent. associated with incomplete fractures of posterior teeth. Bite tests can be performed using orange wood sticks, cotton wool Tactile Examination rolls, rubber abrasive wheels such as Berlew wheels, or the head of number 10 round bur in a handle of cellophane tape. When Scratch the surface of the tooth with the tip of a sharp explorer. using orange wood sticks to determine cracks, the patient is The tip may catch in a crack. asked to bite on individual cusps separately. This helps to isolate the fractured cusp. Exploratory Excavation Cotton rolls can be used to detect cracks. The patient is asked Sometimes exploratory excavation becomes necessary to to bite down on cotton rolls and then suddenly release the obtain a visual diagnosis. The decision to excavate should pressure. Pain perceived on sudden release of pressure confirms always be made with the consent of the patient since it is the diagnosis. The use of rubber plungers of anesthetic carpules not guaranteed that a fracture will be found underneath any suspended from a length of floss can be used in a similar manner removed restoration. Removal of existing restorations may as that of cotton rolls. reveal fracture lines. Other commercially available tools are Fractfinder (Denbur, Percussion Test Oak Brook, IL, USA) and Tooth Slooth II (Professional Results Inc., Laguna Niguel, CA, USA). Ehrman et al. have advocated They are seldom tender to percussion (when percussed apically). the use of this method as one with a higher level of sensitivity

Journal of Pharmacy and Bioallied Sciences Vol 4 August 2012 Supplement 2 - Part 2 S243   Mathew, et al.: Diagnosis of cracked tooth syndrome than that associated with the use of wood sticks. This helps in the segments to differentiate a cracked tooth from a fractured accurate identification of the involved cusp. The Fractfinder cusp or split tooth. No movement with wedging forces implies or Tooth slooth can be used on each individual cusp and the a cracked tooth. A fractured cusp may break off under slight patient is asked to bite, thus allowing the placement of selective pressure with no further mobility. A split tooth will show pressure on one cusp. If there is pain on biting or release of biting mobility with wedging forces and the mobile segment extends pressure, it is indicative that the cusp is cracked. well below the cemento-enamel junction.

Vitality tests are usually positive. However, sometimes the Conditions that may be misdiagnosed as a cracked tooth affected teeth may display hypersensitivity to cold stimuli due involve the following: Acute periodontal disease, reversible to the presence of pulpal inflammation, a feature that may help , dentinal hypersensitivity, galvanic pain, postoperative to confirm a diagnosis of CTS. sensitivity associated with microleakage from recently placed composite resin restorations, fractured restorations, and areas Radiograph of hyperocclusion from dental restorations, pain from bruxism, orofacial pain, or . Radiographs can aid in evaluating the pulpal and periodontal health of a tooth, but it is rare to see a crack on a radiograph.[10- 13] Conclusion Radiographs tend to be of limited use as fractures tend to propagate in a mesiodistal direction, parallel to that of the plane The possibility of CTS must always be considered when of the film. However, they can be useful in detecting more rarely a patient complains of pain or discomfort on chewing or occurring fractures which may run in a buccolingual direction biting. In spite of CTS being a diagnostic challenge, having and for excluding other dental pathology. knowledge and awareness of CTS should enable the dental practitioner to detect the same, thereby preventing further Microscopic Detection crack propagation and complications associated with crack propagation. Experienced clinicians using a clinical microscope have reached a general consensus that ×16 provides an ideal magnification level for References the evaluation of enamel cracks, with a range from ×14 to ×18.[14] Use of the clinical microscope makes possible the treatment of 1. Turp JC, Gobetti JP. The cracked tooth syndrome: An elusive diagnosis. J Am Dent Assoc 1996;127:1502-7. asymptomatic but structurally unsound posterior teeth. 2. Banerjee S, Mehta SB, Millar BJ. Cracked tooth syndrome. Part 1: Aetiology and diagnosis. Br Dent J 2010;208:459-63. Ultrasound is also capable of imaging cracks in simulated tooth 3. Chan AW, Low D. Diagnosis and management of cracked teeth. Hong structure and could pose an important diagnostic aid in the Kong Dent J 2004;1:78-84. 4. Kahler W. The cracked tooth conundrum: Terminology, classification, future. Where direct diagnostic methods prove unsuccessful, diagnosis, and management. Am J Dent 2008;21:275-82. indirect diagnostic methods like banding can be used to detect 5. Lynch CD, McConell RJ. The cracked tooth syndrome. J Can Dent CTS. The use of copper rings, stainless steel orthodontic bands, Assoc 2002;68:470-5. and acrylic provisional crowns may be placed on the tooth to 6. Homewood CI. Cracked tooth syndrome. Incidence, clinical findings and treatment. Aust Dent J 1998;43:217-21. prevent separation of the crack during function. Upon review, 7. Liu HH, Sidhu SK. Cracked teeth treatment rational and case following a period of 2–4 weeks after the application of immediate managemet: Case reports. Quintessence Int 1995;26:485-92. splint, the absence of pain has been described to indicate not only 8. Liewehr FR. An inexpensive device for transillumination. J Endod 2001;27:130-1. a correct diagnosis but also successful immobilization. 9. Lubisich EB, Hilton TJ, Ferracane J. Cracked teeth: A review of the Literature. J Esthet Restor Dent 2010;22:158-67. Another indirect diagnostic method is an unauthenticated 10. Abou-Rass M. Crack lines: The precursors of tooth fractures-their technique which Banerji et al. mentioned in their review on diagnosis and treatment. Quintessence Int 1983;14:437-47. 11. Griffin JD. Efficient, conservative treatment of symptomatic cracked cracked teeth. They recommend placing composite resin over teeth. Compend Contin Educ Dent 2006;27:93-102. the tooth without etching and bonding. The material is added 12. Ailor JE Jr. Managing incomplete tooth fractures. J Am Dent Assoc and wrapped across the external line angles that act as a splint. 2000;131:1168-74. The patient when asked to bite finds a great reduction in 13. Cooley RL, Barkmeier WW. Diagnosis of the incomplete tooth fracture. Gen Dent 1979;27:58-60. discomfort as the material acts as a splint. 14. Clark DJ, Sheets CG, Paquette JM. Definitive diagnosis of early enamel and dentin cracks based on microscopic Evaluation. J Esthet Differentiating a Cracked Tooth from a Fractured Restor Dent 2003;15:391-401. Cusp or Split Tooth Source of Support: Nil, Conflict of Interest: None declared. If a crack can be detected, use wedging to test for movement of

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