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Prevalence and Distribution of Carabelli Cusp in Maxillary Molars in Deciduous and Permanent Dentition and Its Relation to Tooth Size in a Group of Iranian Adult and Pediatric Dental Patients

Atousa Aminzadeh, Samaneh Jafarzadeh, Ania Aminzadeh, Arash Ghodousi




Background: Carabelli cusp is a dental morphologic anomaly arising on the palatal side of the mesiopalatal cusp of maxillary first or second molars. It is believed that this cusp is seen in people with larger teeth. Since it has different prevalence among populations, it can be used in forensic dentistry. As well, dentists should be aware of common dental anomalies that might impact dental treatments. In this study, the prevalence of Carabelli cusp and its relation to tooth size in permanent and deciduous dentitions in Iranian population was assessed.
Methods: This analytic-descriptive study was performed on 129 (43 deciduous, 86 permanent) patients and their dental casts. First and second molars were observed for the presence of Carabelli cusp. Mesiodistal width of teeth was recorded by using a vernier calliper. The data were analyzed by the Independent t test, Chi-square and Mann Whitney statistical tests using SPSS 18.
Results: Frequency of Carabelli trait were respectively 72% and 62% in deciduous and permanent dentitions. No significant difference was seen between males and females in this study in both studied dentitions (P>0.05). Dentitions with Carabelli cusp had larger mesiodistal width compared to other groups in both dentitions (P<0.001).
Conclusion: Carabelli cusp in the studied Iranian population was higher compared to other Asian populations. In addition, its bilateral occurrence like a shallow groove in first maxillary molars was related to larger tooth size in both dentitions.


Anthropology, Carabelli anomaly, Deciduous tooth, Tooth abnormalities, Permanent tooth


Nevill B, Damm D, Allen C, Bouquot J. Oral and maxillofacial pathology. 3rd Edition. Philadelphia: Saunders; 2009.

Mavrodisz K, Rozsa N, Budai M, Soos A, Pap I, Tarjan I. Prevalence of accessory tooth cusps in a contemporary and ancestral Hungarian population. The European Journal of Orthodontics. 2007; 29(2):166–9. doi: 10.1093/ejo/cjl084

Tyagi R, Khuller N, Sharma A, Khatri A. Genetic basis of dental disorders: A review. Journal of Oral Health and Community Dentistry. 2008; 2(3):55-61.

Khan DB, Khan MA, Khattak M. Prevalence of cusp of Carabelli in permanent teeth in a group from Khyber Pakhtunkhwa, Pakistan. Pakistan Oral & Dental Journal. 2011; 31(2):409-11.

Hanihara T. Dental and cranial affinities among populations of East Asia and the pacific: The basic populations in East Asia, IV. American Journal of Physical Anthropology. 1992; 88(2):163–82. doi: 10.1002/ajpa.1330880205

Jerome CE, Hanlon RJ. Dental anatomical anomalies in Asians and Pacific Islanders. Journal of the California Dental Association. 2007; 35(9):631-6. PMID: 17993215

Aguirre L, Castillo D, Solarte D, Moreno F. Frequency and variability of five non-metric dental crown traits in the primary and permanent dentitions of a racially mixed population from Cali, Colombia. International Journal of Dental Anthropology 2007; 10:24-35.

Sadatullah S, Odusanya SA, Mustafa A, Abdul Razak P, Abdul Wahab M, Meer Z. The prevalence of fifth cusp (cusp of carabelli) in the upper molars in Saudi Arabian school students. International Journal of Morphology. 2012; 30(2):757–60. doi: 10.4067/s0717-95022012000200066

Hsu J, Tsai P, Hsiao T, Chang H, Lin L, Liu K et al. Ethnic dental analysis of shovel and Carabelli’s traits in a Chinese population. Australian Dental Journal. 1999; 44:(1):40-5. doi: 10.1111/j.1834-7819.1999.tb00534.x

Eskandari M., Rabiei M., Salamat F, Farhadi M. [Variation of the carabelli cusps in maxillary first molars by casts within 8-15-year-old referred to dental school of Guilan University of Medical Sciences (Persian)]. Journal of Shahid Sadoughi University of Medical sciences. 2012; 20(4):447-53

Dissanayake U, Chandrasekera MS, Wikramanayake ER. The prevalence and mode of inheritance of Carabelli trait in the Sinhalese. Ceylon Journal of Medical Science. 2004; 47(1):7-15. doi: 10.4038/cjms.v47i1.4846

Falomo OO. The cusps of Carabelli: frequency, distribution, size and clinical significance in Nigeria. West African Journal of Medicine. 2004; 21(4)-322-4. doi: 10.4314/wajm.v21i4.28011

Harris E. Carabelli’s trait and tooth size of human maxillary first molars. American Journal of Physical Anthropology. 2007; 132(2):238-246. doi: 10.1002/ajpa.20503

Shethri SA. The prevalence of the Carabelli cusp in selected Saudi population. King Saud University Journal of Dental Sciences. 2011; 2(1-2):13–6. doi: 10.1016/j.ksujds.2011.03.003

Kondo S, Townsend GC. Associations between Carabelli trait and cusp areas in human permanent maxillary first molars. American Journal of Physical Anthropology. 2006; 129(2):196–203. doi: 10.1002/ajpa.20271

DOI: https://doi.org/10.22037/ijmtfm.v8i1(Winter).18858