Cusp-Fossa/groove relationship

Mesiolingual cusp of any Maxillary Molar will be in relationship with Central fossa of the corresponding Mandibular Molar
 
Only Mandibular first molar has 2 facial grooves - Mesiofacial b/w mesiofacial and distofacial cusp.
Distofacial b/w distofacial and distal cusp.
 Rest two mandibular molars have only 1 facial groove present b/w mesiofacial and distofacial cusp.

Mesiofacial cusp of Maxillary first molar will lie in Facial (Mesiofascial) groove of Mandibular first molar.

Mesiofacial cusp of 2nd and 3rd maxillary molar will also lie in facial groove of corresponding mandibular molar.

Distofacial cusp of first Max molar will lie in distofacial groove of mand first molar

Distofacial cusp of 2nd max molar will lie in the facial embrasure of 2nd and 3rd mand molar

Distolingual cusp of 1st max molar will lie on the distal marginal ridge of 1st mand molar and mesial marginal ridge of 2nd Mand molar. (Similar for the 2nd max molar)

Distofacial cusp of any mand molar will lie in the central fossa of the corresponding maxillary tooth.

Mesiofacial cusp of the first mand molar will lie on the mesial marginal ridge of max 1st molar and distal marginal ridge of 2nd max premolar. (Similar for the 2nd and 3rd mand molar)

Mesiolingual cusp of 1st mandibular molar will lie in the lingual embrasure of 1st max molar and 2nd max premolar. (Similar for 2nd and 3rd mand molars).

Distolingual cusp of the 1st mand molar will lie in the lingual groove of 1st max molar. (Similar for 2nd and 3rd Mand molars)

1st max Premolar buccal cusp lies in the Facial embrasure of 1st and 2nd mand premolar. (Similar for 2nd max premolar)

Lingual cusp of both maxillary premolars lie on the distal marginal ridge of the corresponding mand premolar)

1st mand premolar buccal cusp lies on the distal marginal ridge of max canine and mesial marginal ridge of 1st premolar. (Similar for 2nd mand premolar)
 
Lingual cusps of mand premolars do not occlude




By Amit Mongia