JOVD 2004: Furcation canals of the maxillary fourth premolar and the mandibular first molar teeth in cats. Flashcards

1
Q

Authors?

A

V. Negro

S. Hernandez

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2
Q

What is depicted in this diagram?

A

Diagrammatic representationof a mandibular first molar tooth showingthe pulp cavity (chamber and root canals) and a furcation canal.

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3
Q

Describe the study method used?

A
  • 103 feline normal carnassial teeth (54 maxillary fourth premolar and 49 mandibular first molar teeth) extracted from 44 euthanized cats
  • After extraction, teeth were radiographed mesiodistal and buccolingual/palatal aspects and placed in a 2.5 % sodium hypochlorite solution
  • Teeth were then made transparent and then external structure of the teeth remained transparent with the endodontic canal system stainedblack
  • The cleared specimens were immersed in methylsalicylate. and were examined using a stereo microscope and examined at 20x mag inorder to establish endodontic topography and measurements
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4
Q

What was the prevalence of furcation canal in carnassial teeth of cats?

A
  • 45.5% of the 44 cats had at least 1 furcation canal in one of their carnassial teeth
  • 27.2% of the 103 feline carnassial teeth had furcation canal
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5
Q

What was the width and direction of furcation canals in this study?

A
  • mean width: 104.0 um (25.0 to 250.0 um) PM4 and M1
  • Direction of canal:
    • Mx PM4: 100% perpendicular; 75% buccal; 25% palatal
    • Mn M1: 50% disto-mesial; 43% mesio-distal; 77% buccal, 23% lingual
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6
Q

What does the confirmed presence of furcation canals in carnassial teeth raise awareness for?

A
  • presence of communications between the pulp and preriodontium implies that an infectious or inflammatory process can extend between the pulp and periodontal tissue
  • Patho of pulp, perio disease, excessive root planning or perio tx in furcation area may “open” the cementum seal of those furcation canals and contribute to perio-endo lesion
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7
Q

What correlation between the furcation canals and resorption lesions is hypothesized?

A
  • the relatively high percentage of feline carnassial teeth (as not detected in canine canassial teeth) could be a contributing factor in the etiopathogenesis of feline dental resorptive lesions
  • this is further supported by the predominant buccal direction (75.%) of furcation canals coinciding with the prevalence of resorptive lesion on the buccal aspect of affected teeth
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8
Q

CP: I condensed the important info in the 7 first flashcards, so for me the cards 8-13 can be deleted.

A
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9
Q

How many of the extracted teeth had furcation canals?

A

When considering all 103 feline carnassial teeth studied 28 teeth (27.2 %) had furcation canal

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10
Q

What was the mean width of the furcation canals?

A

The mean width of the furcation canals was 104.0pm, with a range of 25.0 to 250.0pm

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11
Q

When viewed in a buccopalatal orientation what direction did the furcation canals course?

A

When viewed in a buccopalatal orientation, 75.0 % of the furcation canals coursed in a buccal direction while the remaining 25.0% had a palatal direction.

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12
Q

Of the 49 mandibular molar teeth which were examined in a buccolingual orientation what percentage of canals deviated lingually versus buccally?

A

When the furcation canals were viewed in a buccolingual orientation,76.9% had canalswith a buccal direction while the remaining 23.1 % exhibited a lingual direction

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13
Q

What feature of furcation canals potentially connects their existence to the incidence of resorptive lesions?

A

The potential involvement of furcation canals in RL is further supported by the predominant buccal direction 75.0 % of furcation canals coinciding with the prevalenceof RL on the buccal aspect of affected teeth

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