CASE PRES Flashcards

1
Q

Number

A

2102646424

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2
Q

Initial exam summary

A

C/O – infection and pain in front teeth

HPC – referred by GDP 15th January 2024
S – upper left central and lateral incisor
O – December 2023
C – dull pain
R – no radiation
A – no associated symptoms
T – constant
E – no painkillers, antibiotics helped pain S – 4/10

PMH – fit and well, no medications, no allergies

PDH – regular attender at GDP
– brushes twice daily with ETB
– flosses once daily

SH – non-smoker
– drinks alcohol occasionally
– works as medical secretary at QEUH (4 days)

E/O
- Lymph nodes, glands, MOM, asymmetry - NAD - TMJ – click LHS, no pain associated

I/O
- Mucosa, palate, tongue, FOM – NAD
- OH inadequate, gingival inflammation - Grade 1 mobility – 16, 48

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3
Q

Special investigations

A

Radiographs
- Right and left BWs
- PA of 12, 11, 21, 22, 15
Clinical photographs
MPBS – Plaque 64%, Bleeding 46%
Sensibility test - 15

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4
Q

Radiograph report

A

Radiographs are diagnostically acceptable.
Bone levels
- Generalised horizontal bone loss 20-50%
- Worst site at 16d – 50%

Restorations
As seen clinically, with the following additions;
- 12 cast post MCC with RCT (inadequate)
- 11 screw post MCC with RCT (adequate)
- 21 cast post MCC with RCT (inadequate)
- 22 screw post MCC with RCT (inadequate)

Pathology
15 – deep caries into inner third of dentine
21 – periapical radiolucency and widening of PDL, inadequate RCT
22 – periapical radiolucency and widening of PDL, inadequate RCT
25 – mesial overhang
48 – buccal caries
11 – deficient, carious crown margin
21 – query carious crown margin (mesial)

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5
Q

Diagnoses

A

Generalised periodontitis stage 3 grade B currently unstable, no known risk factors
Caries – 11 crown margin, 15do, 48b
11 – previously treated, normal apical tissues
21 – previously treated, symptomatic periapical periodontitis
22 – previously treated, symptomatic periapical periodontitis

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6
Q

Tx plan

A

Immediate
Nil
Initial
1. Step 1 BSP S3 guidelines
a. OHI and education
b. Supragingival PMPR
c. Adjustmentof25mesialoverhang
2. Step 2 BSP S3 guidelines a. Subgingival PMPR
3. Caries removal and restoration of 48 4. Caries removal and restoration of 15 Re-evaluation
5. Review periodontal condition
a. 6PPC of quadrants scoring BPE 3 Reconstructive
6. Construct temporary prosthesis for 21, 22 ± 11 7. Post removal and re-RCT 21
8. Post removal and re-RCT 22
9. Post placement and crown 21
10.Post placement and crown 22
Maintenance
11. Review periodontal condition and SPT

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6
Q

Antibiotics

A
  • Dental abscesses are usually streptococci or gram-negative bacteria
  • Local measures should be used in the first instance
  • Amoxicillin 500mg TID for 5 days
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7
Q

Systems enquiry

A
  • CV
  • Resp
  • GI
  • Neuro
  • Liver and kidneys
  • MSK and skin
  • Endocrine
  • Blood
  • Allergies
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8
Q

TMJ click

A
  • Click is due to discoordination of condyle and articular disc
  • Condyle has to overcome mechanical obstruction (disc) before full range of movement achieved
  • Disc displaces anteriorly by the condyle, disc then reduces = click and full movement
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9
Q

TMJ tx

A
  • If pain – counsel, jaw rest, bite raising appliance, surgery if severe
  • Michigan splint = Full coverage splint for either jaw - Hard PMMA
  • BRAs stabilise occlusion and improve function of masticatory muscles, which decreases parafunction
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10
Q

Mobility

A
  • Tooth mobility is described is relation to the bucco-lingual movement observed, detected using a finger and instrument either side of the tooth
  • Grade 1 = <1mm but more than physiological movement
  • Grade 2 = 1-2mm
  • Grade 3 = >2mm ± rotation or depression
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11
Q

BSP stage

A
  • Stage = site of worst bone loss
  • 1 = <15%
  • 2 = coronal third of root
  • 3 = middle third of root
  • 4 = apical third of root
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12
Q

BSP grade

A
  • Describes the patient’s susceptibility to the disease
  • A = slow progression, bone loss < ½ patient’s age
  • B = moderate progression, ½ patient’s age < bone loss < patient’s age
  • C = rapid progression, bone loss > patient’s age
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13
Q

BSP distribution

A
  • Distribution = how many teeth affected
  • <30% = localised
  • > 30% = generalised
  • Molar/incisor pattern
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14
Q

BSP stability

A
  • Stable = BOP <10%, PPD  4mm, no BOP at 4mm sites
  • Remission = BOP >/= 10%, PPD </= 4mm, no BOP at 4mm sites
  • Unstable = PPD >/= 5mm or BOP at sites of 4mm
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15
Q

Subsequent MBPS

A

Plaque - 56%
Bleeding - 50%

16
Q

IRMER

A

IRMER 2017 (ionising radiations medical exposure regulations)
- Protects patients
- ALARP
- All exposures should be justified, optimised and limited
- Roles – dentist can be ALL

Referrer
- Referral for imaging

Practitioner
- Justification for imaging (benefit vs risk)

Operator
- Authorise and carry out imaging
- Assess and report image

Employer
- Provides referral criteria
- Deems staff competent (referrer, practitioner, operator)

17
Q

IRR

A

IRR 2017 (ionising radiations regulations)
- Protects healthcare workers and general public
- Controlled areas with local rules for equipment
- 1.5m from x-ray tube
- Risk assessments

18
Q

Tooth 11 - dental practicability index

A

Structural integrity level 6 – insufficient tooth structure to allow a well-adapted restoration
- Inadequate ferrule
- Subgingival margins
- Once tooth prepared and caries free – near crestal level

Endodontic treatment need level 0
- Asymptomatic and no radiographic signs of infection

19
Q

Tooth 21 - dental practicability index

A

Structural integrity level 2
- Post retained restoration
- Carious crown margin (mesial) but adequate supracrestal dentine

Endodontic treatment need 1
- Previously treated, inadequate filling, easily retrievable, straight canal
- Symptomatic and radiographic evidence of infection

20
Q

Tooth 22 - dental practicability index

A

Structural integrity level 2
- Post retained restoration
Endodontic treatment need 1
- Previously treated, inadequate filling, easily retrievable, straight canal
- Symptomatic and radiographic evidence of infection

21
Q

Risks of tx 21, 22

A
  • Root fracture
  • Post fracture
  • Tooth may be unrestorable
  • Tooth may already be fractured
  • Replacement options
22
Q

Risks of tx 11

A

Likely unrestorable
- Crown margin is grossly carious and deficient
- Once tooth caries free, likely subcrestal preparation
- Unable to clamp and place dam to isolate for RCT
- Inadequate ferrule
Impinging on biologic width

  • Root fracture
  • Post fracture
  • Tooth may be unrestorable
  • Tooth may already be fractured
  • Replacement options
23
Q

What are the constituents of saliva?

A
  • water
  • ions (Na, Cl, K, bicarbonate)
  • protein (amylase, protease, lipase)
  • immunoglobulins
24
Q

What is the function of phosphate in saliva?

A

Buffer in low flow

24
Q

What is the function of bicarbonate in saliva?

A

Buffer in high flow

25
Q

What is the function of chloride in saliva?

A

Activates amylase

26
Q

Risk factors for developing disease?

A
  • diet may induce T2DM
27
Q

Preparation for MCC

A
  • 1.5mm occlusal reduction
  • +0.5mm working cusp occlusal reduction
  • 0.5mm chamfer margin (lingual)
  • 1.3mm shoulder margin (buccal)
  • <6 degree taper
  • removal of undercuts
28
Q

Material for MCC

A
  • CoCr metal substructure
  • metal oxide layer
  • zirconia
29
Q

Bonding between layers of MCC

A
  • mircomechanical retention (ceramic flows into metal surface, sandblasting aids this)
  • compression fit (ceramic shrinks on to metal, “stressed skin”)
  • chemical (metal oxide layer bonds with ceramic)
30
Q

Cement MCC

A

Dual cure luting cement with metal bonding agent eg 10-MDP or 4-META (eg Panavia)

31
Q

Temporary prosthesis

A
  • Essix retainer
  • can incorporate old crowns if removed conservatively
  • can use acrylic denture teeth / composite if crown not available
  • can take teeth in/out of retainer as required for treatment
32
Q

Describe the radiographic appearance of 11

A

Within 2mm of apex – adequate

33
Q

Describe the radiographic appearance of 21

A
  • Short
  • Void
  • Compromises seal, predisposes to leakage and possible failure of RCT
34
Q

Describe the radiographic appearance of 22

A
  • Short
  • Void
  • Compromises seal, predisposes to leakage and possible failure of RCT
  • 22 is ledged – precurved file to navigate
35
Q

Describe the radiographic appearance of 12

A
  • Extruded
  • Short (>2mm short of apex) have a better SR than long root fillings
  • Possibility that it may fail in future – KUO
  • Compromises seal, predisposes to leakage and possible failure of RCT
36
Q

Radiation - effectieve dose

A

Effective dose (uSv) is the equivalent dose multiplied by the tissue weighting factor
- Intraoral = 4
- OPT = 20