VITAL PULP THERAPY ( part I) -IPC /DPC -

The pulp horn of primary molars that at greatest risk of exposure during cavity  preparation is :

• Mesial horn

• Distal horn

• Mesial and distal horn equally

• No risk of pulp exposure during cavity preparation on primary molars .

Answer explanation

Mesial horn is at greatest risk of exposure during cavity preparation of primary molars .

The  carious  lesion always  appears  smaller  on  the  radio- graph than it actually is. Likewise, microscopic observation of ground sections of teeth reveal that the progress of the lesion through the enamel and dentine is more extensive than it is evident on the radiograph:

• Both statements are true

• Both statements are false

• First statement is true second is false

• First statement is false second is true

Answer explanation

Both statements are true

Direct pulp capping is indicated in cases of:

• Large carious exposure of the pulp

• Small mechanical exposure of the pulp

• Non vital tooth

• All of the above

Answer explanation

DPC is indicated only in case of mechanical (accidental/iatrogenic) exposure of the pulp and this exposure should be (pin point) i.e 1 mm or less.

If more than 1 mm another treatment plan is decided according to the type of tooth ( primary/permanent mature/permanent immature).

material used in indirect pulp capping (IPC) is :

• GIC

• Ca(OH)2

• Zinc oxide eugenol paste

• All of the above

Answer explanation

Most commonly used material in IPC is Ca(OH)2 , zinc oxideeugenol paste & GIC

After how many months of vital pulp capping with calcium hydroxide a Calcific bridge may be first see no on the radiograph ?

• After 2. Weeks

• After 1 month

• After 6 months

• After 12 months

Answer explanation

The calcific bridge or tertiary dentine after Ca(OH)2 pulp capping is expected to reveal radiographically after one month so the follow up should be made after 4 to 6 weeks after the first visit .

Which of the following may be a reason of failure of vital pulp therapy :

• Age of the patient

• Presence of microorganisms

• Improper choice of capping material

• All of the above

Answer explanation

All of mentioned reasons are factors affecting the success rate of vital pulp therapy

* Primary and young permanent teeth have more success rate of vital pulp therapy than teeth of elderly patient as they’re more vascular .

* Other options are self explanatory .

Which of the following is the early mean to preserve the vitality of the pulp ?

• Pulpotomy

• Pulpectomy

• Pulp capping

• Cvek pulpotomy

Answer explanation

Pulp capping is the early mean to preserve pulp vitality

The Ca(OH)2 direct pulp capping in primary teeth is not recommended due to the risk of :

• Abscess formation

• Acute pulpitis

• Internal resorption

• External resorption

Answer explanation

Internal resorption is the correct answer

A technique which utilizes calcium hydroxide as liner placed on thin layer of questionable remaining dentin is termed as :

• Direct pulp capping

• Indirect pulp capping

• Vitality test

• Compaction technique

Answer explanation

This technique Is IPC

Which of of the following is the best barrier between a restorative material and the pulp

• Zinc oxide eugenol

• Calcium hydroxide

• Varnish

• Sound dentin

Answer explanation

Sound non carious dentin is the best barrier between the restorative material and the pulp .