| ORIGINAL ARTICLE |
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| Year : 2021 | Volume
: 6
| Issue : 2 | Page : 99-105 |
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Cusp number traits and the dental crown metric traits of mandibular premolars and maxillary second molar in sex determination: A cross-sectional dental model-based observational study
Prathi M Patel1, Jayasankar P Pillai2, Khushali H Shah2, Vaishali S Dodia2, Pooja C Monpara2, Sima P Odedra2
1 Private Practitioner, Dental Square, Gandhinagar, Ahmedabad, India
2 Department. of Oral Pathology, Government. Dental College and Hospital, Ahmedabad, Gujarat, India
Correspondence Address:
Dr. Jayasankar P Pillai
Department. of Oral Pathology, Government. Dental College and Hospital, Ahmedabad, Gujarat
India
 Source of Support: None, Conflict of Interest: None  | Check |
DOI: 10.4103/ijfo.ijfo_20_21
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Background: The size of the posterior tooth crown is defined by the number and size of the cusps and the dimensions in both the mesiodistal and buccolingual planes.
Aim and Objective: The present study was designed to explore the variations in such parameters between genders.
Material and Methods: The dental models of 151 young individuals in the age range of 17–21 years were randomly selected. The crown and cusp dimensions and the number of cusps in mandibular first and second premolars and in maxillary second molars on both the sides were recorded.
Results: The mandibular first premolars showed 97.35% symmetry in the number of cusps between antemers followed by maxillary second molar (88.1%) and mandibular second premolar (82.78%). The mesiodistal and the buccolingual dimensions of the crown in all the three teeth showed significant gender difference. In the maxillary second molar, only the mesiobuccal cusp in the left side showed significant gender difference. In the three cusped second molars, the lingual cusp dimensions showed significant gender difference. The discriminant model using the BL and MD dimensions of all the three teeth showed a canonical correlation of 0.722 (Wilks' lambda = 0.479, P < 0.001) with a hit ratio of 90.1%. The classification results showed that 84.1% of the males and 95.1% of females were correctly predicted using this model. The cusp number traits can significantly differentiate genders with a discriminating power of 61%.
Conclusion: The metric data, especially the mesiodistal and the buccolingual dimensions from mandibular premolars and maxillary second molars, can better differentiate gender than the cusp number traits.
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