Human Dentition I (HMD101) Log Book PDF

1 Human Dentition I (HMD101) Log Book Student Name: ID: Lab: 1  2 Tooth carving Materials used in carving Wax Blocks Wax Knife...

1 Human Dentition I (HMD101) Log Book Student Name: ID: Lab: 1  2 Tooth carving Materials used in carving Wax Blocks Wax Knife Wax Carver Used for cutting excessive wax. Used for carving wax 2  3 Methods for handling the instruments: Modified Pen grasp Palm grasp Instrument support: The carver should be stabilized/ supported during carving Finger on Block Rest Finger on Finger Rest 3  4 Tooth H.W. C.W. Grade Date Signature Trapezoid Tooth H.W. C.W. Grade Date Signature Triangle 4  5 Upper Central Incisor Measurements: Length: Crown- 10.5 mm Root- 13mm Width: Maximum- 8.5mm Neck- 7 mm Thickness: Maximum- 7mm Neck- 6mm The cervical line curvature: Mesial- 3.5mm Distal- 2.5mm Carving steps of the crown: 1-Facial &lingual Surfaces: (Figs.1-4) 1. Measure the crown length & portion of Fig. 1 the root. 2. Draw a midline. Midline 10.5 mm 3. Measure the maximum width at the 5m incisal edge and the smallest width at the m neck portion equally divided at the midline. Fig. 2 4. Join the drawn points to get the trapezoidal shape of the crown. 4.5mm 5. Draw the root portion as two parallel lines. 3.5mm 6. Repeat the previous steps on the opposite surface and join both drawings on the top of the wax block. Fig. 3 7. Carve away the wax surrounding the drawings following the two directions as shown in Figure 4. 5  6 2-Mesial & distal Surfaces: (Figs. 5-8) 1. Draw a midline. 2. Redraw the neckline (bold line) on the Fig. 5 mesial and distal surfaces. 3. Draw a line (dotted line) at the junction between the middle and cervical thirds (Maximum convexities) 4. - Measure the thickness: The neck measurement to be drawn on the neckline. The neck measurement to be drawn on the line of maximum Fig. 6 convexity. 5. Join the drawn points then reach to the incisal edge creating a triangular shape. 6. Draw the root portion as two parallel lines. 7. Repeat the previous steps on the opposite surface. Fig. 7 8. Carve away the wax surrounding the drawings following the three directions as shown in Figure 8. 6 Fig. 8  7 3- Lingual convergence: (Fig. 9) Reduce the lingual surface: 1. Redraw the mesio and disto-lingual line angles inside the lingual surface leaving just 1mm. 2. Remove the wax starting from the midline mesially and distally directing lingually. Fig. 9 Note: i. Keep away from the mesio and disto-incisal angles. ii. After reduction from the midline you have to flare the wax from the labial to the lingual outlines to achieve smooth surfaces from the labial to the lingual aspects. 4-Carve the Lingual surface anatomy: (Fig.10) 1. Draw lateral lines to represent the mesial and distal marginal ridges. 2. Draw an incisal line then outline the cingulum. 3. Remove gently the wax in-between these lines to create the lingual fossa. L Note: The lingual fossa should have a trapezoidal shape of even depth. Fig. 10 5- Carve the cervical line: (Fig. 11) 1. Determine the depth of the cervical line mesially and distally then draw curved lines directed incisally. 2. Draw curved lines labially and lingually within the crown length directed root wise. 3. Join the four lines all together and then remove the wax gently from the root portion till these lines. Fig. 11 7  8 6- Finishing and polishing the crown and root portion: Roundation and smoothening of all the surfaces and line angles must be performed by using the wax carver followed by a piece of synthetic tissue. *The disto-incisal angle should be rounded as shown in fig. 11. Tooth H.W. C.W. Grade Date Signature Maxillary Central Incisor 8  9 9  10 10  11 11  12 12  13 13  14 14  15 15  16 16  17 Draw and label the anatomical landmarks for the upper central incisor. 17  18 Lower lateral Incisor Measurements: Length: Crown- 9.5mm Root- 14mm Width: Maximum- 6mm Neck- 4mm Thickness: Maximum- 7mm Neck- 6mm The cervical line curvature: Mesial- 3mm Distal- 2mm Carving steps of the crown: 1-Facial &lingual Surfaces: (Figs. 13-16) Fig. 13 a-Measure the crown length& portion of the root. b- Draw a midline. Midline 9.5mm 5mm Fig. 14 c- Measure the maximum width at the incisal edge and the smallest width at the neck 3mm portion divided equally on the midline. d- Join the drawn points to get the trapezoidal 2mm shape of the crown. e- Draw the root portion as two parallel Fig. 15 lines. 18  19 Note: i-Repeat the previous steps on the opposite surface and join both drawings on the top of the wax block. ii- Carve away the wax surrounding the drawings following two directions as shown in Figure 16. Fig. 16 2-Mesial & distal Surfaces: (Figs.17-20) Fig. 17 a- Draw a midline. b- Redraw the neckline on the mesial and distal surfaces. c- Draw a line at the cervical fourth. Crown (Maximum convexities) C 1/4 Root portion Fig. 18 19  20 d- Measure the thickness: -The neck measurement to be drawn on the neckline. Crown -The maximum thickness to be drawn on 3.5mm the line of maximum convexity. 3mm e-The incisal edge should be shifted Root 0.5mm lingually to create lingual inclination. portion f-Join the drawn points then reach to Labial the incisal edge creating a triangular shape. Fig. 19 f- Draw the root portion as two parallel lines. Note: i-Repeat the previous steps on the opposite surface. ii- Carve away the wax surrounding the drawings following three directions as shown in Figure 20. Fig. 20 3- Lingual convergence: (Fig. 21) Reduce the lingual surface: a-Redraw the mesio-lingual line angle inside the lingual surface leaving just 1.5mm. b- Remove the wax starting from the midline mesially directing lingually. c-Regarding the disto-lingual line angle gentle roundation should be done. By steps b and c distal deviation to the cinglum has Fig. 21 occurred. 20  21 Note: i-Keep away from the mesio and disto-incisal angles. ii- After reduction from the midline you have to flare the wax from the labial to the lingual outlines to achieve smooth surfaces from the labial to the lingual aspects. 4-Carve the Lingual surface anatomy: (Fig. 22) a-Draw lateral lines to represent the mesial and distal marginal ridges b-Draw an incisal line then outline the cingulum. c-Remove gently the wax in-between these lines to create the lingual fossa. L Note: The lingual fossa should take trapezoidal shape and of even depth. Fig. 22 5- Carve the cervical line: (Fig. 23) a-Determine the depth of the cervical line mesially and distally then draw curved lines directed incisally. b-Draw curved lines labially and lingually within the crown length directed root wise. c-Join the four line all together and then remove the wax L gently from the root portion till these lines. Fig. 23 6- Finishing and polishing the crown and root portion: Roundation and smoothening of all the surfaces and line angles must be performed by using the wax carver followed by a piece of synthetic tissue. The disto-incisal angle should be rounded greatly to create distal tilting of the incisal edge as shown in fig. 23. 21  22 Tooth H.W. C.W. Grade Date Signature Mandibular Lateral Incisor 22  23 Incisal Mesial Distal Fig. 24 23  24 Draw and label the anatomical landmarks for the lower lateral incisor. 24  25 25  26 26  27 Upper canine Measurements: Length: Crown- 10mm Root- 17mm Width: Maximum- 7.5mm Neck- 6mm Thickness: Maximum- 8mm Neck- 7mm The cervical line curvature: Mesial- 2.5mm Distal- 1.5mm Carving steps of the crown: 1-Facial &lingual Surfaces: (Figs. 25- 28) Fig. 25 a-Measure the crown length& portion of the root. Midline 10mm b- Draw a midline. 5mm c- Mark the level of the mesial cusp slope at the incisal 1/4 and the distal cusp slope at the incisal 1/3. Fig. 26 d- Measure the maximum width at the lines representing the cusp slopes and the smallest width at the neck portion 4mm equally divided at the midline. D M e- Join the drawn points to get the 3mm trapezoidal shape of the crown. Then extend from the cusp slopes to the midline of the wax block to form the cusp tip. Fig. 27 f- Draw the root portion as two parallel lines. 27  28 Note: i-Repeat the previous steps on the opposite surface. ii- Carve away the wax surrounding the drawings following three directions as shown in Figure 28. Fig. 28 2-Mesial & distal Surfaces: (Figs. 29-32) Fig. 29 a- Draw a midline. b- Redraw the neckline on the mesial and distal surfaces. c- Draw a line at the junction between the cervical and middle thirds. (Maximum convexities) C 1/3 Fig. 30 28  29 d- Measure the thickness: -The neck measurement to be drawn 4mm on the neckline. 3.5mm -The maximum thickness to be drawn on the line of maximum convexity. e-Join the drawn points then reach to the midline incisally creating a triangular shape. (Fig. 31) f- Draw the root portion as two parallel lines. Note: i-Repeat the previous steps on the opposite surface. ii- Carve away the wax surrounding the drawings following three directions as shown in Figure 32 regardless the cusp slopes. Fig. 32 3- Labial and Lingual ridges: (Fig. 33) a-Draw a midline on the labial surface from the cusp tip to the cervical ridge. b- Remove the wax from the cervical ridge directed mesially and distally toward the midline proximally creating a central elevated area which is the labial ridge. Labial c- Do the same steps on the lingual Fig. 33 surface for the lingual ridge. 29  30 4- Lingual convergence: (Fig. 34) Reduce the lingual surface: a-Redraw the mesio and disto-lingual line angles inside the lingual surface leaving just 1.5mm. b- Remove the wax starting from the midline mesially and distally directing lingually. L Fig. 34 Note: i-Keep away from the mesial and distal cusp slopes. ii- After reduction from the midline you have to flare the wax from the labial to the lingual outlines to achieve smooth surfaces from the labial to the lingual aspects. 5-Carve the Lingual surface anatomy: (Fig. 35) a-Draw lateral lines to represent the mesial and distal marginal ridges b-Draw two incisal lines then outline the cingulum. c-Draw the outlines of the lingual ridge. c-Remove gently the wax in-between these lines to create two lingual fossae. Note: The two lingual fossae should take trapezoidal shape and of even depth. L Fig. 35 6- Carve the cervical line: a-Determine the depth of the cervical line mesially and distally then draw curved lines directed incisally. b-Draw curved lines labially and lingually within the crown length directed root wise. c-Join the four lines all together and then remove the wax gently from the root portion till these lines. (Figure 35) 7- Finishing and polishing the crown and root portion: Roundation and smoothening of all the surfaces and line angles must be performed by using the wax carver followed by a piece of synthetic tissue. 30  31 Tooth H.W. C.W. Grade Date Signature Maxillary Canine 31  32 32  33 Draw and label the anatomical landmarks for the upper canine. 33  34 34  35 35  36 Measurements Upper Lower Upper Central Lateral Canine Length Crown 10.5 9.5 10 Root 13 14 17 Width Maximum 8.5 6 7.5 Neck 7 4 6 Thickness Maximum 7 7 8 Neck 6 6 7 Cervical line Mesial 3.5 3 2.5 Distal 2.5 2 1.5 36  37 University: Nahda Faculty: Oral and Dental Medicine Department: Basic Dental science department. Human Dentition 1 (HMD101) Evaluation Sheet Name: ………………………………………………………………………………… ID: …………………………… Lab:…………………………… Tooth Excellent Very Good Good Poor Signature Trapezoid Triangle Upper central Lower lateral Upper Canine 37