L Kern, K E Childs, G Dunlap, S Clarke, G D Falk
Using assessment-based curricular intervention to improve the classroom behavior of a student with emotional and behavioral challenges
Journal of applied behavior analysis
current study used threedimensional 3d surface homologous modeling analyze structure maxillary first premolar p1 second premolar p2 crowns identify morphological differences particularly cuspal structures study sample comprised 27 male elementary junior high school students chiba prefecture japan plaster casts collected 3d coordinates used measure crown structures thereafter principal component pc analysis carried using 3d coordinates homologous models containing 4498 anatomical data points including 9 landmarks findings indicated p1 significantly larger p2 despite teeth exhibiting similar intercuspal distances homologous model analysis revealed 615 total variance could explained fourth pc overall size shape mesiodistal buccolingual directions estimated using pc1 pc2 respectively components highlighted shape factor indicating buccal cusp welldeveloped lingual cusp p1 compared p2 variations size mesial distal premolar teeth relationships cusps completed tooth crowns explained using molecular biology developmental models