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Perio II > Osseous Surgery > Flashcards

Osseous Surgery Flashcards

1
Q

what are the types of osseous surgeries

A
  • resective procedures ( subtractive)
  • regeneration procedures (additive)
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2
Q

what is an osteoplasty

A

the reshaping of bone to achieve a more physiologic form without removal of alveolar bone proper

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3
Q

what is an ostectomy

A

the removal of alveolar bone proper (supporting bone)

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4
Q

where is an infrabony defect

A

apical to the alveolar crest

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5
Q

what are the types of infrabony defects

A
  • one wall: can be a hemiseptum
  • two wall: crater
  • three wall: true infrabony defect
  • combination: any of the above
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6
Q

what is the most common type of infrabony defect

A

two wall

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7
Q

what is the difference between suprabony and infrabony

A

if the distance between the roots of the teeth is greater than or equal to 2.5mm then the defects will be a vertical defect (amount of cancellous bone present)
- if the distance is less than 2.5mm then horizontal bone loss will occur

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8
Q

what are inconsistent margins

A

the interdental crestal bone is located apical to the level of the radicular bone

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9
Q

what are the osseous defect classifications

A
  • infrabony
  • suprabony
  • interradicular defects
  • dehiscences
  • fenestrations
  • inconsistent margins
  • horizontal bone loss
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10
Q

what are the types of bone morphology and describe each

A
  • positive architecture: physiologic architecture
  • negative architecture: reverse architecture, or inconsistent margins
  • flat architecture
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11
Q

what are the determinants of gingival contour

A
  • not necessarily the underlying bone
  • interdental space
  • position of tooth in the arch- facial or lingual position in the alveolus
  • root shape
  • crown shape
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12
Q

what is the rationale of osseous surgery

A

a reduced probing depth will both increase the effectiveness of oral hygiene by the patient and also facilitate the ease of maintenance by the therapist

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13
Q

what are the indications for osseous surgery

A
  • shallow infrabony defects
  • osseous ledges and tori
  • furcations invasions - class I or shallow class II
  • inconsistent margins
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14
Q

what are the contraindications for osseous surgery

A
  • maxillary anteriors (esthetics)
  • three wall defects (regeneration)
  • isolated deep defects
  • generalized advanced bone loss
  • local anatomic factors
  • high caries rate
  • dentinal sensitivity
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15
Q

what are the local anatomic factors that are contraindications to osseous surgery

A
  • sinus
  • ascending ramus
  • flat palate
  • external oblique ridge
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16
Q

what are the advantages to osseous surgery

A
  • predictable
  • one-stage
  • single surgical site
  • minimal healing time
  • ease of post operative maintenance
17
Q

what are the disadvantages of osseous surgery

A
  • root sensitivity and esthetics (especially in the maxillary anterior)
  • defect dependent
  • loss of attachment ( by ostectomy)
18
Q

what are the alternative treatment for osseous surgery

A
  • regenerative procedures
  • root amputation or hemisection
  • non surgical therapy
  • extraction
19
Q

what is the interrelationship of factors for osseous surgery

A
  • gingival contours
  • bone thickness and contour
  • anatomic factors
  • dentition
  • adjacent teeth
  • position in the arch
  • root and crown anatomy
20
Q

what is the surgical technique in osseous surgery

A
  • bone sounding
  • intra sulcular incisions on facial and lingual of mandible and facial of maxilla
  • mucoperiosteal flap reflection
  • root and defect debridement
  • vertical interproximal grooving
  • reduction of marginal radicular bone
  • elimination of lips of craters
  • removal of widow’s peaks
  • removal of marginal radicular bone
21
Q

what is involved in closure in osseous surgery

A

tissue placement

22
Q

what is closure at the alveolar crest for

A

pocket elimination

23
Q

what is closure coronal to alveolar crest for

A

pocket reduction

24
Q

what are the considerations in the palatal approach in osseous surgery

A
  • wider embrasures
  • more cancellous bone
  • defect location
  • all keratinized tissue
  • one root vs two roots
  • furcations more apical
25
Q

what is the lingual approach in osseous surgery

A
  • furcations more apical
  • defect location
  • axial inclination of molars
  • wider embrasures
  • avoids external oblique ridge
26
Q
A

Perio II (6 decks)

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