Final answer:
The deciduous maxillary first molar looks like a square shape and typically emerges between 12-16 months of age. It's distinct from the wisdom teeth, which are the third molars and might need orthodontic surgery if impacted.
Step-by-step explanation:
The deciduous maxillary first molar generally bears a resemblance to a b) Square shape. Deciduous teeth, also known as baby teeth, include the first molars which typically emerge between 12-16 months of age. The deciduous maxillary first molar is key for beginning the process of crushing food for swallowing, a vital part of the digestive process.
These molars, like permanent molars, are designed for grinding food, with several pointed cusps on the occlusal surface. It is important to note that the maxillary first molar is different from the wisdom teeth, which are the third molars in the set and erupt much later in life, generally during early adulthood. Wisdom teeth often remain impacted and may require removal through orthodontic surgery, if they do not erupt normally.