The intercusp patterns on the mandibular M1 and M2 teeth

• Main Authors: Rusić-Tasić Vesna, Tijanić Ljiljana
• Format: Article
• Language: English
• Published: Antropološko društvo Srbije i Univerzitet u Nišu, Prirodno-matematički fakultet 2012-01-01
• Series: Glasnik Antropološkog Društva Srbije
• Subjects: intercusp pattern; lower M1 and M2
• Online Access: http://scindeks-clanci.ceon.rs/data/pdf/1820-7936/2012/1820-79361247125R.pdf

The existence and contact types between MB and DL cusps (Protoconid-Entoconid contact), as well as the reduction of cusp numbers and their interrelationship, determine the shape of intercusp patterns. According to Hellman, there are three shapes (types) of patterns: 'y', '+' and 'x'. This research was conducted on 552 orthodontic patients study models at the Clinic of Stomatology of Niš, with the aim of determining the frequency of shapes (types) of intercusp patterns on the permanent mandibular M1 and M2 teeth. The lower M1 teeth of the examined patients are characterized by the 'y' shape (70,11%) and the lower M2 teeth by the '+' shape (90,76%). The second frequent on M1 is the '+' shape (27,35%) and the 'x' shape on M2 (4,89%). On the mandibular M1 teeth, the most frequent type is the 'y 5' type (69,75%) , then the '+ 4' type (23,35%). For M2, the '+ 4' type is characteristic in 89,85%, while the 'y 5' type is found only in 3,44%.