Multidisciplinary Ortho (Gardner) Flashcards
How much will alveolar ridge shrink in the first six months after tooth extraction?
23%
What gets thick behind moving teeth?
Lamellar bone
What is the term for erupting a tooth orthodontically, bringing bone with it?
Forced eruption
What 3 things can forced eruption improve?
- Reduce recession and periodontal pockets
- Improve esthetics
- Improve crown to root ratio
What is a consideration when you are thinking about moving a mandibular molar medially into an edentulous area?
Ensure you don’t leave a maxillary molar unopposed
What can be done orthodontically then prosthetically to improve gingival esthetics and then improve the crown to root ratio?
Extrude the tooth orthodontically to bring bone and gingiva with it, then reduce and crown it to get improved crown to root ratio
How long does it take to extrude a tooth and then how long must it be retained for?
6 months to extrude, then retain it through one sigmoid (one bone cycle)
What is a consideration for ortho when the restorative plan involves implants?
Move roots to allow a path for implant placement
What is the best thing to hold a space if the patient is still growing and ortho is complete?
Bridge / Maryland Bridge (resin-bonded FPD)
Why will an implant not move with ortho?
It osseointegrates
Why are gummy smiles difficult to diagnose?
Can be caused by skeletal, gingival, or short crown height.
What is key to find before treating a gummy smile?
The CEJ to determine the etiology of the gummy smile
What are some methods to correct a gummy smile after finding the CEJ and diagnosing the cause?
- Gingivoplasty
- Orthodontics
- Orthognathic surgery
- Prosthodontics
When should a frenectomy be done: before or after space closure?
After. Constriction tissue will help keep space closed
What is required after space closure (maxillary diastema)?
Permanent retention
The gingival margins of the maxillary teeth should follow what?
The upper lip
Incisal edges of maxillary teeth should follow what?
The lower lip
How should the teeth appear as the dentition is viewed from the front?
Teeth should be 1/3 smaller as you go posterior (Smile Arc)
If one tooth is missing, what should you try to match when replacing it?
Contralateral side
If both maxillary laterals are missing, how wide should the replacement teeth be?
2/3 the width of the central incisors
What is the term for spaces between the teeth that are apparent even when the teeth are touching?
Black triangles
Black triangles are always related to what?
Tooth contact point and its distance to the bone
When the contact point is within how many mm of bone will there be black triangles?
Within 5mm
If the contact point to bone is 6mm, what is the percentage that will have dark triangles?
44%
