complete dentures Flashcards

Question

Occlusal Vertical Dimension

Answer 1

OVD the height of the face from the lower border of the nose to immediately underneath the chin when the teeth are together

Answer 2

* TMD * poor masticatory efficiency * speech problems * facial pain over masseter

Answer 3

* angular cheilitis * occlusal truama * clicking teeth

Answer 4

resting vertical dimension the height of the face from the lower boder of the nose to immediately underneath the chin when the teeth are apart at rest

Answer 5

freeway space difference between RVD and OVD should be 2-4mm

Answer 6

History Exam * E/O * ‣ Face shape * ‣ Profile * ‣ Changes * I/O * ‣ Ridge shape (Atwood and Howell) * ‣Undercuts - spicules/irregularities * ‣ Consistency * ➡ Firm * ➡ Friable (flabby) * ➡ Jagged (knife edge) * ‣ Tissue health * ‣ Saliva flow and quality * ‣ Sulcus depth * ‣ Muscle relationships * ‣ Skeletal relationship (AP)

Answer 7

Assess if undercuts - this will determine material used * ‣ If undercuts then use - Alginate (Irreversible Hydrocolloid) * ‣ If no undercuts then use - Impression Compound (Non-Elastic) Use the same material for Upper and Lower usually

Answer 8

Please pour up primary impressions in 50/50 Stone and Plaster Please construct special trays in light cure PMMA A. * Upper - E/O handle * Lower - I/O handles w/ stub handles over premolars Spacer - For the material you will use at MASTERS! * Alginate - 3mm * Silicone/Compound * i) Upper - 2mm * ii) Lower - 1mm

Answer 9

Trim special tray check extension Modify trays with greenstick tracing compound (heat till it begins to droop) * Upper - Canine stops, Post dam extension full posterior border of tray * Lower - Canine stops, Retromolar pad * Both - Add material to fill functional sulcus and border mould Use Polyvinyl siloxane (Extrude) - Medium body ➡ remember that PVS is hydrophobic so will create blebs - dry mucosa! ➡ Polyether (impregum is an alternative but has one visocity but is hydrophilic)

Answer 10

1. Please pour up the secondary impressions in 100% dental stone 2. Construct upper and lower wax occlusal rims on light cured bases 3. Please do to post dam as marked

Answer 11

MEASURE RESTING FACE HEIGHT AND OVD adjust upper record block lipline and occlusal plane measure vertical dimension and establish face height tooth position registration selection of teeth

Answer 12

* Trim any overextensions otherwise will drop * Don’t give too much lip support * Adjust rim vertically till youre roughly happy where it is * Don’t adjust too much so as you have working room for occlusal plane determination

Answer 13

* use the alar tragus line (superior part of EAM and the alar of the nose (nostril squishy side bit) make parallel with foxes bite plane and also view from front and make sure foxes bite plane parallel to interpupillary line * Determine Canine line - inner canthus of the eye with floss * Mark high smile line here as you’re done adjusting the occlusal plane

Answer 14

Willis bite gauge used to measure RVD and OVD To get OVD try and replicate their RCP as this is what youll use later * lick lips and look out window absent mindedly * then measure RVD * OVD should be 2-4mm less than this depending what you want your FWS to be! - are you increasing or maintaining OVD? If you want to change FWS then adjust lower block and not the upper! youve done that already

Answer 15

Biometric guidance (Watt and McGregor) Set upper teeth buccal to the residual ridge 8-10mm anterior to the incisal papilla Set lower teeth on the ridge

Answer 16

Make sure cenine line, high smile line and centre line marked Make two location notches in the premolar region of the two blocks to allow them to be accurately articulated Use Jetbite to register together

Answer 17

1. please mount casts to the registration recorded on an average value articulator 2. Please set the upper teeth to the record block 3. Please set the lower teeth to the upper teeth. 4. See shade and mould overlea

Answer 18

retention extension support stablity aesthetics occlusion

Answer 19

pull sharply down on anteriors get pt to raise tongue for lowers

Answer 20

check that the functional sulcus is filled post dam included no uncomfortable overextensions or loose underextensions

Answer 21

push down on occlusal surfaces of teeth should displace slightly but not overly so look for bony spicules and relieve

Answer 22

grab molar teeth move from side to side use retromylohyoid area to maximise this neutrol zone respected?

Answer 23

is the pt happy with shade and mould? profile? midlines coincide smile line buccal corridors

Answer 24

mandibular occlusal plane at level of RMP practice in retruded arc of closure even contacts

Answer 25

to delvery 1. please wax up for finish and process in heat cured PMMA 2. Also Mark post dam at this stage. IF retrial Re-Trial: remount casts and make specified changed for second tria

Answer 26

- Do same checks as Tooth trial - Make any trimmings to it - Give denture advice sheet (see section on Denture Hygiene) - Review in 2 weeks

Answer 27

- Reline and Rebase ➡ Hard Reline * Chairside - Butylmethycrylate (non-irritant) * Lab - PMMA ➡ Soft Reline * Tissue conditioner - infected tissue - helps healing, can do functional impression by keeping in for 24hrs (short term) * Soft reline (long term) ✴ P - pain - from bony prominences, residual monomer, retained roots or pathology ✴A - atrophic ridge ✴S - superficial mental nerve ✴B - bony prominences ✴O - omfs ✴X - xerostomia

Answer 28

premature contacts = grind down incorrect occlusal plane = remake locked or wedged occlsuion = cuspless teeth

Answer 29

rare can be from tongue rubbing or cheek biting - relieve

Answer 30

reline rebase implant retained precision attachment add post dam

Answer 31

1. Apply fix to fitting surface of one tray and the outside of another tray i.e the bottom 2. 5x scoops of lab putty per impression, activator applied measure - 1 width of spoon mark per one scoop of putty 3. Set denture into tray as you would normally and adapy putty 4. Locating notches into the putty for when you do opposing impression 5. Vaseline on set lab putty of first denture impression 6. Put new ball of putty onto the fitting surface of denture already in impression and push really hard 7. Push your second tray really hard onto this new putty (the one youve fixed on the back side) 8. Match locating notches up with ones youve already done 9. Take dentures out of the moulds by levering from the heel of the denture to minimise chance of fracture 10. wash old dentures return to patient 11. put impressions back together 12. you will be given a shellac base and record block to record jaw reg next time

Answer 32

occlusal pivots restore occlusal surface with auto polymerising resin

Answer 33

rapid resorption of lingual and buccal bone resulting of a narrow rudfe two corries back to back

Answer 34

immediate dentures severe periodontal disaease before XLA traumatic surgery before XLA

Answer 35

surgical removal of bony spicules soft liner on denture

Answer 36

combination syndrome

Answer 37

forces directed at upper anterior maxillary ridge covered by a denture occluding with dentate lower causes rapid resorption of maxillary ridge which, the overlying tissue becomes very fibrous and flabby

Answer 38

mucostatic impression material window technique - 2 stage impression with wash, cut out square in the tray and inject light body relief holes precut before take impression

Answer 39

* Maintain soft tissue * Haemorrhage control * Reduce dry socket * Psychological benefit * Aesthetics * Prevent soft tissue collapse * Maintain muscle tone

Answer 40

* Knife edge ridge * poor fit with resorption * No trial stage so can’t refine * difficult with surgical XLA as bone removal

Answer 41

alkaline hypochlorites effervescent peroxides

Answer 42

e.g.dentural, Milton Don’t leave cobalt chromium dentures for longer than ten mins as they can corrode Superior cleaning properties Effective dissolution of plaque Stain removal properties Bacterial and fungicidal properties Possible bleaching of acrylic resin Residual taste after use

Answer 43

e.g. steradent, boots effervesant original Powder of tablets Rapid in action and simple to use Problems can arise if very hot water used with denture, it can cause bleaching Additional mechanical cleansing action Bubbles created by the release of Oxygen which may dislodge debris

Answer 44

candida albicans

Answer 45

wearing at night poor OH diabetes immunocompromised xerostomia

Answer 46

Denture Hygiene take out and clean with separate toothbrush - Alakaline peroxide for 20mins then store in water CHX mouthwash Miconazole gel, Nystatin Fluconzaole, itraconazole, Ketoconazole Tissue conditioner if youre making new denture to temporarily relive current one

complete dentures Flashcards

(70 cards)