The anterior roof of the mouth, called the hard palate, is formed by the bone(s).

The anterior roof of the mouth, known as the hard palate, is formed by two bones: the palatine process of the maxilla and the horizontal plate of the palatine bone.

Here are the steps:

1. The hard palate is the anterior part of the roof of the mouth.

2. This structure is bony and forms a barrier between the oral and nasal cavities.

3. The hard palate is formed by the fusion of two bones.

4. The first bone is the palatine process of the maxilla. The maxilla is the upper jaw bone, and its palatine process is a horizontal projection that forms the majority of the hard palate.

5. The second bone is the horizontal plate of the palatine bone. This is a small bone located at the back of the nasal cavity, and its horizontal plate forms the back part of the hard palate.

6. These two bones are fused together along the midline by a suture, forming the complete hard palate.