Skip to main content

Table 1 Assessment criteria for Adams clasp, buccal canine retractor, palatal finger spring, Southend clasp, Z-spring and Hawley labial bow

From: The effect of live demonstration and flipped classroom with continuous formative assessment on dental students’ orthodontic wire-bending performance

  ASSESSMENT CRITERIA
Adams Clasp 1. The bridge of the clasp should be straight
2. The bridge of the clasp should parallel to the buccal cusp
3. The bridge of the clasp shouldn’t touch the buccal surface of the 1st molar
4. The height of the bridge of the clasp should be at halfway up the buccal surface of the molar
5. The mesial arrowhead should be at 45°
6. The distal arrowhead should be at 45°
7. The mesial arrowhead should engage the mesio-buccal undercut
8. The distal arrowhead should engage the disto-buccal undercut
9. The mesial arm of the clasp should follow the occlusal embrasure
10. The distal arm of the clasp should follow the occlusal embrasure
11. The mesial arm of the clasp should touch the occlusal embrasure
12. The distal arm of the clasp should touch the occlusal embrasure
13. When the mesial arm goes on the palatal tissue, there should be about 0.5 mm to 1 mm clearance
14. When the distal arm goes on the palatal tissue, there should be about 0.5 to 1 mm clearance
15. The mesial arm should be bend towards palate in a mesial direction
16. The distal arm should be bend towards palate in a mesial direction
17. The mesial tag should be facing towards the palate
18. The distal tag should be facing towards the palate
Buccal canine retractor 1. 0.5–1.5mm away from buccal side of alveolar mucosa
2. Coil at least 2 mm away from sulcus and coil height preferably at or above root apex
3. Mesial/active arm along the long axis of canine, mid-crown width
4. Coil diameter 2–3 mm
5. There is no gap within the helix coil
6. Coil situated distal to mesial/active arm
7. Coil resting on top of mesial/active arm
8. Horizontal retraction end of the mesial/active arm starts perpendicular to the mesial/active arm
9. Horizontal retraction end of the mesial/active arm curves along crown curvature to the level of mesial contact point of canine
10. Small safety coil present at end of mesial/active arm
11. Small safety coil tucked/folded tightly at end of mesial/active arm
12. Small safety coil at end of mesial/active arm adapted to mesial surface inter-proximally
13. Distal/retentive arm follow occlusal embrasure between second premolar and first molar
14. Distal/retentive arm touch occlusal embrasure between second premolar and first molar
15. When the palatal retention arm goes on the palatal tissue, there should be about 0.5 to 1 mm clearance
16. Retention tag should be facing towards the palate
Palatal finger spring 1. The diameter of the helix coil is 2- 3mm
2. There is no gap within the helix coil
3. The retentive arm should be at least 4mm
4. The coil should be bent in the opposite direction of planned tooth movement
5. The coil should be placed on the slope of palatal vault region.
6. When the retentive arm goes on the palatal tissue, there should be about 0.5 mm to 1 mm clearance
7. The tag should be facing towards the palate
8. Active arm is positioned perpendicular to tooth movement direction
9. Small safety coil at end of active arm
10. Small safety coil at end of active arm adapted to mesial surface inter-proximally
11. The guard wire is 10-15mm in length. It should follow the amount of tooth movement required (e.g. distance from mesial of canine to distal of 1st premolar)
12. Tag ends of guard wire is 1-2mm and in same direction
Southend clasp 1. The wire should follow the contour of the cervical margin of UR1 and UL1 on the labial side with a small U-loop in between the central incisor
2. The wire should be 0–1 mm away from the gingiva
3. The wire should touch the tooth surface
4. The right arm of the clasp should touch the occlusal embrasure
5. The left arm of the clasp should touch the occlusal embrasure
6. The wire should follow the contour of the cervical margin of UR1 and UL1 on the palatal side until the mesial third of the incisor
7. The right retentive arm should start at the mesial third of the incisor with a perpendicular bend towards the palate
8. The left retentive arm should start at the mesial third of the incisor with a perpendicular bend towards the palate
9. The distance between the two retentive arms should be at least 2 mm
10. The right tag should be facing towards the palate
11. The left tag should be facing towards the palate
12. When the right arm goes on the palatal tissue, there should be about 0.5 mm to 1 mm clearance
13. When the left arm goes on the palatal tissue, there should be about 0.5 to 1 mm clearance
Z-spring 1. Small safety coil at end of active arm
2. The active arm is straight
3. The width of z-spring should be equal to the mesio-distal width of the lateral incisor
4. The active arm should be gingival to the first helix
5. The diameter of the first helix coil is 2–3 mm
6. There is no gap within the first helix coil
7. The second helix should be gingival to the first helix
8. The diameter of the second helix coil is 2–3 mm
9. There is no gap within the second helix coil
10. The spring should be perpendicular to the mid-palatal surface of the lateral incisor
11. When the retentive arm goes on the palatal tissue, there should be about 0.5 to 1 mm clearance
12. The tag should be facing towards the palate
Hawley labial bow 1. The labial segment of the wire should be placed at the middle third of the incisors
2. The right mesial vertical segment of the wire should start from the mesial third of the right canine
3. The left mesial vertical segment of the wire should start from the mesial third of the left canine
4. The right mesial vertical segment should be perpendicular (90°) to the labial segment
5. The left mesial vertical segment should be perpendicular (90°) to the labial segment
6. The right distal vertical segment should be parallel to the mesial vertical segment
7. The left distal vertical segment should be parallel to the mesial vertical segment
8. The right vertical segment should be 0.5–1.5mm away from buccal side of alveolar mucosa
9. The left vertical segment should be 0.5–1.5mm away from buccal side of alveolar mucosa
10. The vertical height of the right loop should be 2–3mm above the gingival margin
11. The vertical height of the left loop should be 2–3mm above the gingival margin
12. The right retentive arm should follow the occlusal embrasure
13. The left retentive arm should follow the occlusal embrasure
14. The right retentive arm should touch the occlusal embrasure between the right canine and first premolar
15. The left retentive arm should touch the occlusal embrasure between the left canine and first premolar
16. When the right retentive arm goes on the palatal tissue, there should be about 0.5 to 1 mm clearance
17. When the left retentive arm goes on the palatal tissue, there should be about 0.5 to 1 mm clearance
18. The right tag should be facing towards the palate
19. The left tag should be facing towards the palate