pISSN 2234-7518
eISSN 2005-372X
eISSN 2005-372X
Description of the measurements of the analyzed variables
| Variable | Description |
|---|---|
| Coronal zone | The coronal zone is defined as the bone-free zone and is delimited by drawing a line parallel to the occlusal plane from the amelocemental junction and another from the top of the tuberosity (W1). The distance between the two lines is measured in mm and is the length of the coronal zone (Figure 1) |
| Tuberosity zone | The tuberosity zone is defined as the bone zone and is delimited horizontally by drawing a parallel to the occlusal plane from the top of the tuberosity (W1) and another parallel from the floor of the tuberosity (W2). Vertically, it is delimited by tracing a tangent to the distal root of the second molar (H1) and a tangent to the inner cortex of the tuberosity (H2). Both extending from the apical zone to the coronal zone The width of the tuberosity is measured (mm) with a horizontal line, parallel and equidistant to the lines (W1 to W2), extending from line H1 to line H2 The height of the tuberosity is measured (mm) with a vertical line, parallel and equidistant to the lines (H1 and H2), extending from line W1 to line W2 (Figure 2) |
| Apical zone | The apical zone is defined as the zone of influence of the maxillary sinus and is delimited by drawing a line parallel to the occlusal plane from the floor of the tuberosity (W2) and another parallel from the uppermost point of the root apex of the distal root of the second molar The distance between the two lines (mm) is the length of the apical zone. When the floor of the tuberosity is below the root apex of the second molar, the result will be negative (–) and when it is above the distal root, the result will be positive (+) (Figure 3) |
W1, top of the tuberosity; W2, floor of the tuberosity; H1, tangent to the distal root of the second molar; H2, tangent to the inner cortex of the tuberosity.