Final answer:
The molar relationship in primary dentition, like the flush terminal plane, influences the eventual occlusion of permanent teeth by increasing the chances of Class I occlusion or causing a posterior crossbite without a mesial shift.
Step-by-step explanation:
The molar relationship in the primary dentition affects the occlusion of the permanent dentition significantly when characterized by a flush terminal plane. This level end-to-end relationship can lead to an increased likelihood of a Class I normal occlusion in the permanent dentition; however, it may also result in a posterior crossbite if there's no mesial shift during the transition.
This is because the primary second molars guide the eruption of the permanent first molars. Dental health professionals assess these relationships to predict occlusal issues and to plan for future orthodontic treatment if necessary. Recognizing the molar relationship early assists in mitigating potential complications that could arise during the dental transition period. Timely observations and interventions can greatly influence the overall dental health and aesthetics of the permanent dentition.