|Year : 2006 | Volume
| Issue : 5 | Page : 41-43
Dens evaginatus of anterior teeth (talon cusp) associated with other odontogenic anomalies
Department of Pedodontics and Preventive Dentistry, Govt. Dental College and Hospital Postgraduate, Institute of Medical Sciences, Rohtak - 124 001, Haryana, India
48/9J, Medical Campus, Rohtak-124001, Haryana
Source of Support: None, Conflict of Interest: None
Depending on tooth location, usually, dens evaginatus describes an anomaly of posterior teeth and talon cusp as an anomaly of anterior teeth. From the standpoint of developmental, morphological and histological considerations dens evaginatus is a more acceptable term to use and talon cusp should be considered as a subset of dens evaginatus. It mostly occurs as an isolated finding rather than an integral part of any disorder. Two cases of dens evaginatus along with other dental anomalies are reported.
Keywords: Associated anomalies, dens evaginatus, talon cusp
|How to cite this article:|
Sharma A. Dens evaginatus of anterior teeth (talon cusp) associated with other odontogenic anomalies. J Indian Soc Pedod Prev Dent 2006;24, Suppl S1:41-3
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Sharma A. Dens evaginatus of anterior teeth (talon cusp) associated with other odontogenic anomalies. J Indian Soc Pedod Prev Dent [serial online] 2006 [cited 2020 Jul 7];24, Suppl S1:41-3. Available from: http://www.jisppd.com/text.asp?2006/24/5/41/26039
| Introduction|| |
Dens evaginatus is an odontogenic developmental anomaly that can be defined as a tubercle or protuberance from the involved surface of the affected tooth consisting of an outer layer of enamel, a core of dentin and may contain a slender extension of pulp tissue. Dens evaginatus has also been referred to as: the simplest type of dilated composite odontoma, occlusal tubercle, Leong's premolar, tuberculated premolar, odontomas of axial core type, evaginated odontoma or occlusal enamel pearl.,,, It is most often reported in premolars but can also occur in molars, canines and incisors.,,, It may occur in the form of a drop, a pointed or cylindrical cone on the occlusal surface of the posterior teeth, while in the anterior teeth a conically shaped extension of the cingulum is observed.,
Talon cusp is an accessary cusp like structure projecting from cingulum area or cementoenamel junction of maxillary or mandibular anterior teeth and is composed of normal enamel, dentin and varying extensions of pulp tissue. Based on the degree of their formation and extension, the anomaly can be classified as - Talon, Semitalon and Tracetalon. Majority of the cases reported in the literature indicate talon cusp as an isolated anomaly however it may be associated with other somatic and odontogenic abnormalities.,,,,
The present report describes two cases of bilateral dens evaginatus (talon cusp) of maxillary permanent lateral incisors in association with other dental findings.
| Cases Report|| |
An eight year old female patient reported to the department with the complaint of malalignment of upper anterior teeth. No relevant family/medical history was reported. General physical examination revealed that the patient was normal. Intraoral examination [Figure - 1] showed a mixed dentition stage with class I molar relationship. The maxillary permanent lateral incisors exhibited pronounced cusp like structure projecting from the cingulum area (semitalon). The tip of the cusp was in close proximity to the crown surface and the developmental grooves on the lateral sides of the cusp were non-carious. The anomalous cusp did not irritate the tongue during speech and mastication nor interfere with occlusion. The teeth responded normally to electric pulp testing. Radiographically, separate enamel and. dentin were seen in the V-shaped structure, but pulp extension could not be traced [Figure - 2].
The other dental abnormality recorded was bilaterally, palatally erupting two supernumerary teeth in the maxillary incisors region [Figure - 1]. Radiographic examination also confirmed two well developed mesiodens, supplemental in form [Figure - 2]. The two supernumeraries were extracted.
A nine year old boy reported with the chief complaint of odd looking upper front teeth. Nothing abnormal was detected during history taking or general physical examination. Oral examination [Figure - 3] revealed both the maxillary permanent lateral incisors with enlarged or prominent cingula (tracetalon) which were not troublesome to the patient, contained no caries and did not interfere with the occlusion. Response to electrical pulp testing of the affected teeth was within normal limits. Other odontogenic variations detected were shovel-shaped central incisors with bifid cingula and a palatally erupted, conical supernumerary tooth between the maxillary central incisors (mesiodens). Radiographic examination [Figure - 4] confirmed the same. The mesiodens was extracted.
| Discussion|| |
Earlier authors have treated dens evaginatus and talon cusp as separate anomalies describing them as an anomaly of posterior teeth and anterior teeth respectively., However, certain cases previously reported as dens evaginatus of anterior teeth have been considered to be talon cusps by some authors., Talon cusp and dens evaginatus show similar morphological and histological appearance, due to identical pathogenesis. A multifactorial etiology combining both genetics and environmental factors has been postulated, though their exact mechanism of formation is not known. Thus, it was proposed that talon cusp and dens evaginatus are the same anomaly and that talon cusp is a subset of dens evaginatus.
The anomaly appears to be more prevalent in patients with Rubinstein-Taybi syndrome, Mohr syndrome and Sturge- Weber syndrome More Details More Details. Various dental abnormalities in association with talon cusp have been reported like peg shaped lateral incisors, impacted mesiodens, complex odontoma, supernumerary teeth, megadont, dens invaginatus, shovel shaped maxilla incisors, bifid cingula, exaggerated cusps of carabelli etc.,,,, The present report showed the association of dens evaginatus with supernumerary teeth, shovel shaped incisors and bifid cingula. However, no somatic abnormalities were observed in both the cases.
It is essential to have a precise criteria for categorization and standardized terminology of an accessory cusp for future prevalence surveys and evaluation of its clinical significance. Despite occasional report of cases, to date, there has been no controlled clinical trial conducted to evaluate the effectiveness of a particular type of treatment for this anomaly. Stewart et al grouped the treatment of dens evaginatus into those techniques employed on vital or non-vital teeth. The treatment varies with the circumstances of individual case ranging from selective grinding and prophylactically resorting the grooves to endodontic therapy.,,,, Some patients require no treatment at all (as in the present cases reported), if esthetic appearance is satisfactory, function is within normal limits, no caries or advanced attrition are present and if the anomalous cusp is not sharp to irritate the tongue or affect speech. Early recognition and continued monitoring, however is the key to proper treatment.
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[Figure - 1], [Figure - 2], [Figure - 3], [Figure - 4]
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