title: Comparison of sexual dimorphism of permanent mandibular canine with mandibular first molar by odontometrics.
abstract: OBJECTIVE
  Sexual dimorphism is one of important tool of forensic science. The objective of this study is to assess the dimorphic status of mesio-distal (MD) and bucco-lingual (BL) diameter of mandibular canine with mandibular first molar among the students of dental college. This study is of definite significance as sex chromosomes and hormonal production influenced tooth morphology.
  
  
  METHODS
  The descriptive study adopted the purposive sampling technique, of 50 male and 50 female aged 17-25 years, using study casts for mesio-distal and bucco-lingual dimensions of mandibular canine with mandibular first molar were taken using digital Vernier caliper. The data obtained were subjected to statistical analysis using descriptive statistics and t-test to compare MD and BL dimensions in male and female populations and P ≤ 0.05 was found statistically significant.
  
  
  RESULTS
  Sexual dimorphism can be predicted by measuring mesiodistal dimension of mandibular canine and mandibular first molar. The left mandibular canine showed more sexual dimorphism (12.66%) in comparison to left mandibular first molar (0.824%) only. Right mandibular canine showed greater dimorphism in MD dimensions (10.94%) in comparison to right mandibular first molar (6.96%). In bucco-lingual dimensions mandibular canine showed less variability when compared with mandibular first molar, thus our study showed more significance on mesio-distal dimensions of both teeth.
  
  
  CONCLUSIONS
  The present study concludes statistically significant sexual dimorphism in mandibular canine over mandibular first molar on study casts. The MD dimensions in mandibular canine and mandibular first molar can help in determining sex and identification of unknown person.
authors.affiliation: Department of Oral and Maxillofacial Pathology, Ahmedabad Dental College and Hospital, Ahmedabad, India.
authors.forename: Aditi
authors.initials: A
authors.lastname: Agrawal
authors.affiliation: Department of Dental Anatomy and Oral Biology, Basic Dental Sciences, Faculty of Dentistry, University of Taif, Kingdom of Saudi Arabia.
authors.forename: Bhari Shranesha
authors.initials: BS
authors.lastname: Manjunatha
authors.affiliation: Department of Oral and Maxillofacial Pathology, KM Shah Dental College and Hospital, Vadodara, Gujarat, India.
authors.forename: Bhavik
authors.initials: B
authors.lastname: Dholia
authors.affiliation: Department of Orthodontics and Dentofacial Orthopedics, Faculty of Dentistry, University of Taif, Kingdom of Saudi Arabia.
authors.forename: Yousef
authors.initials: Y
authors.lastname: Althomali
keywords: Bucco-lingual dimension; mesio-distal dimension; odontometrics; odontometry; sexual dimorphism; study casts; vernier caliper
references.citation: Forensic Sci Int. 2009 Nov 20;192(1-3):129.e1-5
references.pmid: 19744808
references.citation: J Dent Res. 1967 Sep-Oct;46(5):963-72
references.pmid: 5234039
references.citation: Odontostomatol Trop. 2003 Dec;26(104):33-6
references.pmid: 15074076
references.citation: Forensic Sci Int. 2000 May 15;110(2):107-15
references.pmid: 10808099
references.citation: Leg Med (Tokyo). 2006 Oct;8(5):288-92
references.pmid: 17027313
references.citation: Acta Med Okayama. 2011 Apr;65(2):113-22
references.pmid: 21519369
references.citation: J Forensic Odontostomatol. 1999 Dec;17(2):30-4
references.pmid: 10709560
references.citation: Forensic Sci Int. 2007 Nov 15;173(1):47-56
references.pmid: 17320321
references.citation: Egypt Dent J. 1993 Jan;39(1):343-6
references.pmid: 8299532
references.citation: Nepal Med Coll J. 2011 Jun;13(2):96-9
references.pmid: 22364090
references.citation: J Forensic Sci. 2005 Mar;50(2):269-73
references.pmid: 15813536
references.citation: J Craniofac Genet Dev Biol. 1990;10(1):7-18
references.pmid: 2373756
references.citation: Ned Tijdschr Tandheelkd. 1995 Jun;102(6):236-42
references.pmid: 11836814
references.citation: Forensic Sci Int. 2011 Jul 15;210(1-3):74-81
references.pmid: 21371836