OPTION 1

• Pit and fissure caries of the primary type develops on the occlusal surface of molars and premolars, buccal and lingual surface of the molars and the palatal surface of the maxillary incisors. Pits and fissures with high steep walls and narrow bases are those most prone to develop caries due to their mechanical characteristics, which result in poor self-cleansing features.

• These deep pits or fissures are sometimes considered developmental faults, particularly since the enamel in the extreme depth is often very thin or even occasionally absent.

• Deep and narrow pits and fissures favor the retention of food debris along with microorganisms, and caries may result from fermentation of this food and the formation of acid.

• Pits and fissures affected by early caries may appear brown or black and will feel slightly soft and ‘catch’ a fine explorer point. The enamel directly bordering the pit or fissure may appear opaque bluish white as it becomes undermined.

• This undermining occurs through lateral spread of the caries at the dentinoenamel junction, and it may be a rapid process if the enamel in the base of the pit or fissure is thin.

Key concept:

• Pits and fissures affected by early caries may appear brown or black and will feel slightly soft and ‘catch’ a fine explorer point. The enamel directly bordering the pit or fissure may appear opaque bluish white as it becomes undermined.

• This undermining occurs through lateral spread of the caries at the dentinoenamel junction, and it may be a rapid process if the enamel in the base of the pit or fissure is thin.