Incomplete Mamelon Fusion – A Rare Developmental Anomaly


  • Department of Pedodontics, Dr. HSJ Institute of Dental Sciences and Hospital, Panjab University, Sector 25, Chandigarh 160014
  • Department of Oral Pathology, Dr. HSJ Institute of Dental Sciences and Hospital, Panjab University, Sector 25, Chandigarh 160014


Dental Anomalies, Mamelons, Maxillary Central Incisor


Dental anomalies affect the shape, size, structure and number of the teeth. Any disturbance, during the developmental stage of a tooth encountered, due to a syndrome, exposure to chemicals, drugs, local physical agents, genetic or an isolated anomaly may be detrimental to the tooth. Lobes are the building blocks of tooth crowns. The labial aspect of a permanent maxillary central incisor develops by a union of three lobes, visible as protuberances on the incisal edge, and are termed mamelons. We present a rare developmental anomaly wherein the distal lobe of the central incisor had incompletely fused with the central lobe forming a deep gaping fissure on the coronal aspect, thus predisposing it to dental caries. The case report discusses the identification, etiology, management and differential diagnosis of such a case.


Kathariya MD, Nikam AP, Chopra K, Patil NN, Raheja H, Kathariya R. Prevalence of dental anomalies among school going children in India. J Int Oral Health. 2013;5:10–14.

Guttal KS, Naikmasur VG, Bhargava P, Bathi RJ. Frequency of developmental dental anomalies in the Indian population. Eur J Dent. 2010;4:263–269.

Shpack N, Dayan T, Mass E, Vardimon AD. Labial cervical vertical groove (LCVG) distribution and morphometric characteristics. Arch Oral Biol. 2007;52:1032–1036.

Wong HM. Aetiological factors for developmental defects of enamel. Austin J Anat. 2014;1:1003.

Logan WHG, Kronfeld R. Development of the human jaws and surrounding structures from birth to the age of fifteen years. J Am Dent Assoc. 1933;20:379–427.

Nolla CM. The development of permanent teeth. J Dent Child. 1960;27:254–266.

Chegini-Farahini S, Fuss J, Townsend G. Intra- and interpopulation variability in mamelon expression on incisor teeth. Dent Anthropol. 2000;14:1–6.

Fitzgerald LR, Harris EF, Obermann K, McKnight JT. Incisor mamelon morphology: diagnostic indicators of abnormal development. J Am Dent Assoc. 1983;107:63–66.

Smithson SF, Thompson EM, McKinnon AG, Smith IS, Winter RMD. The KBG syndrome. Clin Dysmorphol. 2000;2:87–91. Accessed

Dunning JM. Principles of Dental Public Health. 4th ed. Cambridge: Harvard University Press; 1986:143.

Hyatt TP. Cavities, grooves, sulci and fissures. Dental Cosmos. 1923;65:1219–1222.

Dunning WB, Ellsworth DS. A Dictionary of Dental Science and Dental Art. 1st ed. Philadelphia: The Blakiston Co.; 1936.



How to Cite

Sharma, U., & Gulati, A. (2018). Incomplete Mamelon Fusion – A Rare Developmental Anomaly. Journal of Pierre Fauchard Academy (India Section), 30(1), 28–31. Retrieved from



Original Articles