Extractions In Orthodontics Question And Answers

Extractions Important Notes

Wilkinson’s extraction

• It involves the extraction of all the four permanent molars between the age of 8 1/2 to 9 years
• It is done to
  • Minimize arch crowding
  • Provide addition space for eruption of third molars
• Basic is that the first permanent molars are highly susceptible to caries

Extractions Short Essays

Question 1. Second Premolar extraction for treatment purposes.
Answer:

Indications Of Second Premolar Extraction:

• To strengthened anchorage of anterior segment
• For mesial movement of posterior teeth
• Treat mild anterior crowding
• When 4-5mm of anchorage loss is desired
• Impacted 2nd premolars
• In open bite – as it results in deepening of bite
• In case of grossly carious/extensive restored teeth
• Early loss of deciduous molars which leads to inadequate space for 2nd premolar to erupt
• When arch length-tooth material discrepancy is 2.5-5 mm

Question 2. First premolar extractions.
Answer:

Reasons Of First Premolar Extractions

• To gain space to utilized for correction
• Satisfactory contact between canine and 2nd premolar
• Teeth posterior to it offers adequate anchorage

Indications Of First Premolar Extractions:

• To relieve moderate – severe anterior crowding
• For correction of class 2, division 1 and Class 1 bimaxillary protrusion
• In case of > 5 mm arch length tooth material discrepancy

Question 3. Therapeutic Extractions.
Answer:

Extractions carried out as a treatment procedure for gaining space are called therapeutic extractions

Need for Extraction:

• Arch length – tooth material discrepancy
• Correction of saggital interarch relationship
• Abnormal tooth size and form
• Skeletal jaw malrelation

Choice Of Teeth – Common Premolars:

Factors Of Therapeutic Extractions:

• Arch length tooth material discrepancy
• Direction and amount of jaw growth
• Facial profile
• Tooth position
• Age of patient

Disadvantages Of Therapeutic Extractions:

• Mesial migration of posterior teeth
• De-crowding of lower anteriors – following extraction of lower 1st premolar

Read And Learn More: Orthodontics Short And Long Essay Question And Answers 

• Buccal non-occlusion
• Non coincidence of mid lines

Prevented By:

• Balaced extraction

Question 4. Wilkinson’s Extraction.
Answer.

• Advocated by Wilkinson
• Teeth extracted – All permanent 1st molars
• Age – 8 1/2-9 1/2 years

Benefits – Minimizes Crowding:

• Provides space for the third molar eruption
• Decreases risk of caries

Draw Backs:

• Limited space to relieve crowding
• Tipping of second premolar and 2nd molar
• First molar unable for anchorage

Extractions Viva Voce

• Maxillary first molar is the most commonly extracted teeth
• Maxillary anterior are least extracted