Which eruption sequence is associated with the earliest physiological occlusal contact?

Which eruption sequence is associated with the earliest physiological occlusal contact?

• A. Temporary lower incisors
• B. Lower permanent incisors
• C. Temporary first molars
• D. Permanent first molars

Answer: (C)

The earliest functional, or physiological, occlusion in the primary dentition occurs once the first primary molars erupt in both arches. These teeth provide the first broad, occlusal contact between upper and lower teeth, establishing intercuspation and the initial stable vertical dimension needed for chewing. Incisors erupt earlier but their contacts are mainly incisal and don’t create the first functional posterior occlusion. Permanent incisors and molars come in later, so they don’t set up the initial occlusion in the primary dentition. Therefore, the eruption of temporary first molars is associated with the earliest physiological occlusal contact.

The earliest functional, or physiological, occlusion in the primary dentition occurs once the first primary molars erupt in both arches. These teeth provide the first broad, occlusal contact between upper and lower teeth, establishing intercuspation and the initial stable vertical dimension needed for chewing. Incisors erupt earlier but their contacts are mainly incisal and don’t create the first functional posterior occlusion. Permanent incisors and molars come in later, so they don’t set up the initial occlusion in the primary dentition. Therefore, the eruption of temporary first molars is associated with the earliest physiological occlusal contact.