Hall Crowns

Question 1

Indications for hall technique

Answer 1

Carious primary molar
No clinical or radiographic signs of pulpal involvement (clear band of dentine not within 2/3rds)
Good cooperation

Question 2

Contraindications for hall technique

Answer 2

Clinical or radiographic signs of pulpal involvement
MH: Cardiac pt with IE risk = XLa or conventional resto
Mobility

Question 3

Major failures of a hall crown

Answer 3

Irreversible pulpitis
Abscess
Inter-radicular radiolucency
Furcation involvement
TTP
Sinus/abscess

Question 4

Instruments required for Hall Crown

Answer 4

Gauze/sticky stick
Cotton wool rolls - wipe excess
Excavator - remove crown/wipe excess
Flat plastic - load crown
Straight probe - remove separators/wipe excess
Pliers to adjust crown
Mirror

Question 5

Indication for separators

Answer 5

Tight contacts
Loss of mesiodistal width
Removed 3-5 days later

Question 6

Clinical steps for a Hall Crown

Answer 6

Sit upright + use gauze
Use smallest size of crown that covers all cusps + approaches contact points with a slight spring
Can measure crown with BPE probe + tooth
Dry crown, fill with GI luting cement
Fully seat crown with finger OR child bites or both (2-3mins)
Wipe cement with cotton wool
Floss contacts

Question 7

POIG for Hall Crown

Answer 7

Will feel odd when biting but occlusion will adjust within a week

Question 8

Advantages of hall crowns

Answer 8

Quick easy non invasive no prep/LA required