A biofilm support including a plastic biofilm support element having a maximum dimension which does not exceed 50 mm and having a specific gravity of between approximately 0. The device includes a background rendering engine to render the polygons received from the geometric processor. The invention further provides a fabrication method of the circuit board described above. According to the invention, a dental patient is selected from a patient data base, the patent’s teeth are examined, and the condition of each tooth region is recorded using selectable icons. The invention further relates to hybrid lettuce seeds, plants, and plant parts produced by crossing cultivar Manitou with another lettuce cultivar. Thereby it is possible to achive both of simplification of a cable channel and the economy of the apparatus.