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Dental Histology
Chapter 17 Molars
| Question | Answer |
|---|---|
| The molars have the largest/smallest occlusal surface. | Largest |
| How many roots do the mandibular molars have? | Two roots |
| How many roots do the maxillary molars have? | Three roots |
| What are some basic functions of the molars? | Largest and strongest teeth; grind or crush food; support tissues of the cheek and facial muscles; involved with aesthetics & speech. |
| How many lingual cusps are present on the mand. molars? | 2 |
| How many buccal cusps are present on the max. molars? | 2 |
| When does the max. first molar erupt? | 6-7 years |
| When does the root complete on the max. first molar? | 9-10 years |
| How many lobes are present on the max. first molar? | 4-5 lobes |
| How many cusps are present on the max. first molar? | 4-5 cusps 2 B;2L- 1L being afunctional |
| What is the largest crown in the dentition? | Max. First Molar |
| Where is the buccal height of contour? | cervical 1/3 |
| Where is the lingual height of contour? | middle 1/3 |
| What root is the longest on the max. first molar? | Lingual root |
| The smallest, non functional cusp, that is not always present on the max. first molar? | Cusp of Carabelli |
| How many pulp horns are on the max. first molar? | One for each major cusp. |
| How many pulp canals are present in the max. first molar? | Three- one for each of the three roots. |
| Why might the DB cusp of the max. first molar have increased supragingival tooth deposits? | Because it is opposite the parotid salivary gland |
| When does the max. second molar erupt? | 12-13 years |
| When does the root complete on the max. second molar? | 14-16 years |
| How many lobes are present on the max. second molar? | 4 lobes |
| How many cusps are present on the max. second molar? | 4 cusps. 2 buccal; 2 lingual |
| What is the largest root on the max. second molar? | Lingual. |
| How many roots are present on the max. second molar? | 2 buccal; 1 lingual. |
| Where is the height of contour for the buccal? | cervical 1/3 |
| Where is the height of contour for the lingual? | middle 1/3 |
| How many pulp canals does the max. second molar have? | 3 main pulp canals- one/root |
| How many pulp horns are present on the max. second molar? | Four pulp horns. MB, DB, ML, DL |
| What are the possible crown outlines? | Rhomboidal and heart shape |
| When does the max. third molar erupt? | 17-21 years |
| When does the root complete on the max. third molar? | 18-25 years |
| How many lobes are present on the max. third molar? | 4 lobes=4 cusps |
| Where is the height of contour on max. third molar? | buccal- cervical 1/3 lingual-middle 1/3 |
| How many pulp canals CAN be present on the max. third molar? | three if there is three roots; 4 if there is 4 roots; 1 if the roots are fused. |
| Clinical considerations of the max. molars? | Possible penetration into the maxillary sinus; deep lingual pits; Mulberry Molars; Concrescence; Anodontia; microdontia; dentigerous cysts on impacted third molars |
| When does the mand. first molar erupt? | 6-7 years |
| When does the root complete on the mand. first molar erupt? | 9-10 years |
| How many lobes are present on the mand. first molar? | 5 lobes=5 cusps |
| What cusps are present on the mand. first molar? | 3 buccal; 2 lingual |
| How many pulp canals are present in the mand. first molar mesial root? | two. |
| Where is the height of contour on the buccal side of the mand. first molar? | cervical 1/3 |
| Where is the height of contour on the lingual side of the mand. first molar? | middle 1/3 |
| How many pulp canals and horns are present on the mand. first molar? | 3 pulp canals; 5 pulp horns |
| How many functional cusps are present on the mand. first molar? | 5 cusps. |
| When does the mand. second molar erupt? | 11-12 years |
| When does the root complete on the mand. second molar? | 14-15 years |
| How many lobes and cusps are present on the mand. second molar? | 4 lobes and 4 cusps. |
| How many buccal and lingual cusps are present on the mand. second molar? | 2 buccal and 2 lingual |
| How many root canals are in the distal root of the mand. second molar? | 1 root canal |
| How many root canals are in the mesial root of the mand. second molar? | 2 root canals |
| Where is the height of contour on the buccal side of the mand. second molar? | cervical 1/3 |
| Where is the height of contour on the lingual side of the mand. second molar? | middle 1/3 |
| What are mulberry molars? | developmental disturbance resulting from congenital syphilis; enamel nodules on occlusal surface. |
| Multiple roots give molars a decreased/increased periodontal disease | increased |
| Why are molars lost to periodontal disease more than single rooted teeth? | because of the presence of furcations |
| Long root trunks are more found more on the first molar or second? | Second Molar |
| Molar furcations are too narrow for access by instruments resulting in? | Prognosis to see if periodontally involved. |
| When does the mand. third molar erupt? | 17-21 years |
| When does the mand. third molar roots complete? | 18-25 years |
| How many lobes and cusps are present on the mand. third molar? | 4 lobes and 4 cusps. |
| What is the occlusal surface of the mand. third molar? | Wrinkles with an oval outline |
| Where is the height of contour on the buccal side of the mand. third molar? | Cervical 1/3 |
| Where is the height of contour on the lingual side of the mand. third molar? | Middle 1/3 |
| Enamel Pearl | Deposits of enamel to the level on the CEJ and extend into the root furcations areas- commonly found on the 2nd molars. |
| Removal of enamel pearl | Cannot be removed with instruments, must be ground away to restore the normal contour of the tooth. |
Created by:
Strobelight95
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