Planing across the grain is sometimes called "traverse" or "transverse" planing. Other operations falling into miscellaneous categories include shaping, planing, boring, broaching and sawing. Heavy boats with hulls designed for planing generally cannot exceed hull speed without planing. Professional treatment includes routine dental visits for debridement, scaling and root planing. Periodontal therapy or scaling and root planing has also been suggested as an additional treatment. The class emphasizes light hull weight to promote quick planing or foiling. Root planing involves smoothing the tooth's root. The long term effectiveness of scaling and root planing depends upon a number of factors. These include fast multihulls and some planing monohulls. Most surfboards are planing or semi-planing hulls. Most surfboards, although unpowered, are planing or semi-planing hulls. The planing step improves the surfaces of the timber. As such, the inverted bell shape is a popular form used with planing hulls. There she expects to find Lucas working at another planing mill, ready to marry her.