PERIODONTICS Flashcards
(52 cards)
On true lingual surface of tooth 41, PPD measures 7mm and gingival margin is in normal position. What is CAL?
A) 7mm
B) 4mm
C) 3mm
D) 2mm
B) CAL = 4mm (Normal gingival overgrowth above CEJ is 3mm, therefore CAL = 7mm - 3mm)
*Question and answer taken from canvas quiz
When using a Nabers probe to detect furcation involvement, which of the following most accurately describes a CL2 furcation involved tooth/
A) First silver band of probe in furcation <3mm
B) Second black band of probe in furcation > 9mm
C) Second silver band of probe is in furcation >6mm
D) First black band of probe partially inside furcation >3mm less than 6mm
D)
*Question and answer taken from canvas quiz
Explain the horizontal and vertical classification of furcation involvement.
Vertical:
Subclass A = 0-3mm
Subclass B = 4-6mm
Subclass C = 7mm and above
Horizontal
Class I = 0-3mm
Class 2 = >3mm
Class 3 = Through and through
Name the current periodontal disease classification being used worldwide
A) SBI
B) PSR
C) Classification of periodontal and peri-implant diseases and conditions 1999
D) Classification of periodontal and peri-implant disease and conditions 2017
D)
*Question and answer taken from canvas quiz
According to 2017 classifcation of periodontal and peri-implant diseases and conditions, the two main categories of gingivitis?
A) Non biofilm induced gingivitis and necrotising gingivitis
B) Gingival enlargement caused by medications and dental biofilm induced gingivitis
C) Dental biofilm induced gingivitis and non biofilm induced gingivitis
D) Necrotising gingivitis and biofilm induced gingivitis
C)
*Question and answer taken from canvas quiz
What is the definition of a periodontitis case?
Interdental CAL >/=2mm in >/= 2 non-adjacent teeth OR buccal/oral CAL >/= 3mm with PPD >3mm in >/= 2 teeth
Periodontitis is classified as stage 1 when the following is recorded:
A) CAL 3-4mm, bone loss 15-30%, PPD =5mm, no tooth loss due to perio, horizontal bone loss pattern, no furcations
B) CAL >/=5mm, bone loss >/=33%, PPD >6mm, 3 teeth loss due to periodontitis, bone loss pattern vertical, class 2/3 furcations
C) CAL 1-2mmm, bone loss <15%, PPDF <4mm, no tooth loss due to perio, horizontal bone loss pattern, no furcations
D) CAL >5mm, bone loss >/=33%, PPDF <6mm, 4 teeth loss due to perio, bone loss patterns <3mm vertical, class 2/3 furcations
C)
*Question and answer (small variations) taken from canvas quiz
A patient presents with clear medical history excluding smoking 2 cigs/day. After full mouth perio chart and panoramic radiograph, the following parameters noted: average probing depth is 6mm in over 30% of teeth present, two vertical bone loss lesions visible, site with greatest CAL measures 6mm, one tooth lost due to perio, two class 2 furcations. There has been no change in these parameters over the past 5 years when reviewing period radiographs and perio chart. Which is the full perio diagnosis you would assign?
A) Localised stage 2, grade A
B) Localised stage 1, grade B
C) Generalised stage 4, grade C
D) Generalised stage 3, grade B
D)
*Question and answer taken from canvas quiz
What are primary goals of staging per the 2017 periodontal classifcations?
A) Staging refers to severity of disease at presentation and rate of progression
B) All answers are correct
C) Staging refers to biological features and complexity of disease management
D) Staging refers to severity of disease at presentation and complexity of disease management
D)
*Question and answer taken from canvas quiz
Distinguish staging and grading.
Staging:
- Classify severity and extent of current situation
- Assess complexity of long-term management
Grading:
- Estimates future risk of periodontitis progression and responsiveness to standard therapy
- Estimates potential health impact of periodontitis on systemic diseases and the reverse
Distinguish localised vs generalised periodontitis.
Localised = <30% teeth involved
Generalised = >30% teeth involved
Should be specified when staging
What are we aiming to remove when undertaking subgingival debridement?
A) Subgingival biofilm/necrotic cementum and granulation tissue
B) Subgingival biofilm/necrotic cementum and junctional epithelium
C) Subgingival biofilm/calculus and granulation tissue
D) Subgingival biofilm/calculus/necrotic cementum
C)
*Question and answer taken from canvas quiz
What does supportive periodontal therapy/maintenance involve?
A) Removal of hopeless prognosis teeth, prophylaxis/clinical and radiographic reassessment (if necessary), subgingival debridement (if necessary)
B) OHI remotivation, prophylaxis/clinical and radiographic reassessment (if necessary), surgical therapy (if necessary)
C) Full treatment planning, clinical and radiographic reassessment (if necessary), subgingival debridement (if necessary)
D) OHI remotivation, prophylaxis/clinical and radiographic assessment (if necessary), subgingival debridement (if necessary)
D)
*Question and answer taken from canvas quiz
What makes the PSR system unique?
A) The way the probe is marked and read
B) Its intended use on patients
C) The way the probe is inserted into the sulcus
D) Its adoption by the ADA and AAp
A)
*Question and answer taken from canvas quiz
The correct patient management for PSR code 1 is:
A) A comprehensive full mouth perio examination/charting must be carried out
B) Individualised OHI should be reinforced and supragingival plaque removal
C) A comprehensive full mouth perio examination/charting followed directly be subgingival debridement
D) Individualised OHI and removal of subgingival plaque, removal of calculus and plaque-retentive margins and restorations
B)
*Question and answer taken from canvas quiz
Which of the following is correct about the universal curette?
A) There is only one cutting edge
B) It is used for subgingival debridement only
C) The face is perpendicular to the terminal shank
D) It has a pointed toe and rounded back
C)
Briefly explain the design of the gracey curette in terms of number of cutting edges, cross section of the toe and the angle between face and terminal shank.
- One cutting edge
- Semicircular cross section
- Rounded toe and back
- Face at 70 degrees to the terminal shank
What is the correct recommendation for use of chlorhexidine?
A) Rinse 10mL 0.2% twice daily
B) Rinse 10mL 0.12% once daily
C) Rinse 15mL 0.2% twice daily
D Rinse 15mL 0.12% once daily
A)
15mL of 0.12% Chx twice daily can also be used
Explain the three categories of periodontitis under the new classification.
- Necrotising periodontal diseases
- Periodontitis
- Periodontitis as a manifestation of systemic diseases
What are the three categories of tooth mobility?
Class 1 = B/L movement =1mm
Class 2 = B/L movement > 1mm
Class 3 = B/L movement > 1mm AND vertical displacement
What are the predominant microorganisms in necrotising periodontal diseases?
Trepenema, Provetella, Fusobacterium
Briefly explain the steps involved in periodontal treatment.
- PSR/SBI/API
- Initial prophylaxis I:
- Educate patient, OHI, discuss habits (e.g. smoking cesssation)
- Supragingival scaling - Periodontal assessment:
- PSR/SBI/API
- +/- Extractions for hopeless teeth
- Only proceed to next stage if SBI and API are within acceptable limits - Initial prophylaxis II:
- Periodontal charting - 6 point parameters
- Diagnosis and treatment plan
- Subgingival scaling - Reevaluation (3 - 12 weeks after):
- Periodontal chart - 6 point parameters
- API/SBI
- +/- Extractions for hopeless teeth
- +/- Periodontal surgery or microbial diagnosistics if required - Supportive periodontal therapy:
- Periodontal status is under control
- Remotivate patient
- Professional prophylaxis and supragingival debridement
- Subgingival debridement and clinical/radiographic reassessment if required
Distinguish magnetostrictive and piezoelectric ultrasonic scalers.
Ultrasonic scaler – Magnetostrictive:
- Stack of flat metal strips or rod of ferromagnetical material (capable of being magnetised) as transducer
- Transducer attached with working tip
- Coil within housing generate magnetic field = Influences the tip and causes it to move
- Tip moves in an elliptical or circular manner
- Type of motion allows the use of all sides (360°) of the working tip
Ultrasonic scaler – Piezoelectric
- Transducer completely contained within the handpiece and not connected to working tip
- Tip movement primarily linear / linear motion only the lateral (two) sides of the working tip are activated
Which of the following is false regarding ultrasonic scalers?
A) Ultrasonic scalers contraindicated in patients with respiratory diseases
B) Caution should be taken when using on primary/newly erupted permanent teeth
C) Piezoelectric contraindicated in patients with unshielded pacemaker
D) Ultrasonic scalers contraindicated ion areas of demineralisation of recession
C) - False as referring to magnetostrictive