Table 1.
Landmarks and definitions of points in maxillary basal bone.
| L (landmark) | Definition |
|---|---|
| L1 | Farthest point of right maxillary basal bone |
| L2-L5 | Buccal retromolar space of right maxillary basal bone |
| L6-L8 | The buccal point of second molar and buccal midpoint of second molar and first molar in right maxillary basal bone |
| L9-L11 | The buccal point of first molar and buccal midpoint of first molar and second premolar in right maxillary basal bone |
| L12-L13 | The buccal point of second premolar and buccal midpoint of second premolar and first premolar in right maxillary basal bone |
| L14-L15 | The buccal contact point of first premolar and buccal midpoint of first premolar and canine in right maxillary basal bone |
| L16-L20 | The buccal point from canine to central incisor in right maxillary “basal bone” |
| L21 | The buccal forefront point of maxillary basal bone |
| L22-L26 | The buccal point from central incisor to canine in left maxillary basal bone |
| L27-L30 | The buccal midpoint of canine and first premolar and buccal point of second premolar in left maxillary basal bone |
| L31-L33 | The buccal midpoint of second premolar and first molar and buccal point of first molar in left maxillary basal bone |
| L34-L36 | The buccal midpoint of first molar and second molar and buccal point of second molar in left maxillary basal bone |
| L37-L40 | Buccal retromolar space of left maxillary basal bone |
| L41 | Farthest point of left maxillary basal bone |
| L42-L45 | Lingual retromolar space of left maxillary basal bone |
| L46-L48 | The lingual point of second molar and lingual midpoint of second molar and first molar in left maxillary basal bone |
| L49-L51 | The lingual point of first molar and lingual midpoint of first molar and second premolar in left maxillary basal bone |
| L52-L55 | The lingual point of second premolar and lingual midpoint of first premolar and canine in left maxillary basal bone |
| L56-L60 | The lingual point from canine to central incisor in left maxillary basal bone |
| L61 | The lingual forefront point of maxillary basal bone |
| L62-L66 | The lingual point from central incisor to canine in right maxillary basal bone |
| L67-L70 | The lingual midpoint of canine and first premolar and lingual point of second premolar in right maxillary basal bone |
| L71-L73 | The lingual midpoint of second premolar and first molar and lingual point of first molar in right maxillary basal bone |
| L74-L76 | The lingual midpoint of first molar and second molar and lingual point of second molar in right maxillary basal bone |
| L77-L80 | Lingual retromolar space of right maxillary basal bone |