Which sequence correctly lists the teeth most often missing in permanent dentition, in descending order?

Which sequence correctly lists the teeth most often missing in permanent dentition, in descending order?

• A. Maxillary and Mandibular Third Molars, Maxillary Lateral Incisor, Second Mandibular Premolar, Mandibular Incisors, Maxillary Second Premolars
• B. Maxillary and Mandibular Third Molars, Mandibular Second Premolars, Maxillary Lateral Incisor, Mandibular Incisors, Maxillary Second Premolars
• C. Maxillary and Mandibular Third Molars, Mandibular Second Premolars, Mandibular Incisors, Maxillary Second Premolars, Maxillary Lateral Incisor
• D. Maxillary and Mandibular Third Molars, Mandibular Incisors, Maxillary Lateral Incisor, Mandibular Second Premolar, Maxillary Second Premolars

Answer: (A)

The pattern being tested is how often teeth are congenitally missing in the permanent dentition (hypodontia) and which tooth types are most commonly affected. After the wisdom teeth, the next most frequently missing tooth is the maxillary lateral incisor, reflecting a high agenesis rate in that specific tooth. Following that, the mandibular second premolar is commonly absent, which aligns with developmental and genetic factors influencing the posterior dentition. Mandibular incisors are less often missing than those two, and the maxillary second premolars are the least frequently missing among the five listed in this sequence. This ordering—third molars first, then maxillary lateral incisors, then mandibular second premolars, then mandibular incisors, and finally maxillary second premolars—fits the widely observed prevalence patterns reported in orthodontic literature.

The pattern being tested is how often teeth are congenitally missing in the permanent dentition (hypodontia) and which tooth types are most commonly affected. After the wisdom teeth, the next most frequently missing tooth is the maxillary lateral incisor, reflecting a high agenesis rate in that specific tooth. Following that, the mandibular second premolar is commonly absent, which aligns with developmental and genetic factors influencing the posterior dentition. Mandibular incisors are less often missing than those two, and the maxillary second premolars are the least frequently missing among the five listed in this sequence. This ordering—third molars first, then maxillary lateral incisors, then mandibular second premolars, then mandibular incisors, and finally maxillary second premolars—fits the widely observed prevalence patterns reported in orthodontic literature.