Restorative dentistry Flashcards
what is class 1 skeletal pattern
maxilla 2-3mm in front of the mandible
what is class 2 skeletal pattern
maxilla >2-3mm in front of mandible
what is class 3 skeletal pattern
mandible anterior to maxilla
what is stable occlusion
when the teeth occlude such that the possibility of movement is minimised
what is intercuspal position
maximum interdigitation of the teeth, OVD is measured in this position
what is edge-edge contact
upper and lower incisal edges are touching, teeth slide forward from ICP guiding on palatal surfaces of anterior teeth
what is protrusion
mandible slides anteriorly to maximum limit, this movement is controlled primarily by the lateral pterygoid, during this movement the condyle slides down the condyle eminence
what is maximum opening
full translation of the condyle over the articular eminence, no teeth contact
what is retruded axis position
terminal hinge axis position, where the condyles articulate with the thinnest most avascular part of their respective disks, this is the most superior anterior position of the condylar head in the glenoid fossa
what is retruded contact position
the first tooth contact when the mandible closes in the retruded arc of closure
what is working side guidance
the side towards which the mandible moves
what is non-working side guidance
the side opposite to the side in which the mandible moves
what is sagittal condylar guidance
the angle formed by the inclination of the glenoid fossa in the saggital plane. The condyle descends down this on protrusive and lateral movements, causing disclusion of the non-working side
what is bennett angle
upon lateral excursion of the mandible, the working condyle moves vertically whereas the non-working condyle moves forward and inward. It refers to the bodily lateral movement of the non-working condyle resulting from lateral movements of the condyle
what is canine guidance
upon lateral excursion of the mandible, the canines remain in contact and cause disclusion of the rest of the teeth on the working and non-working side
what is group function
simultaneous contact between multiple maxillary and mandibular teeth, ideally the premolars and canines, upon lateral mandibular movements distribute the biting force across the PDL
what is a conformative approach to occlusion
restoration provided are designed in accordance with the exisiting jaw relationship
what is a re-organised approach to occlusion
when an ICP cannot be established reliably, the occlusal scheme is re-designed in the retruded axis position, the most reproducible contact points
what is centric interference
a premature contact that prevents the patient from closing in ICP, it can cause mandibular deviation in three dimensions
what is working side interference
upon lateral excursion, contact between maxillary and mandibular molars on the working side discludes the anterior teeth or teeth involved in group function
what is non-working side interference
upon lateral excursion, there is contact between maxillary and mandibular teeth on the non-working side
what is protrusive interference
premature contact between maxillary and mandibular posterior teeth upon maxillary protrusive
what are the treatment options for missing teeth
implants, conventional/adhesive bridge, glass fibre - reinforced composite bridge, composite bridge, flexible denture, cobalt chrome/acrylic partial denture
what are relative contraindications of implants
diabetes, smoking, alcohol, drugs, active periodontitis, TMJD, immunocompromised patients, bleeding disorders, bisphophonate therapy
what are absolute contraindications for implants
patient not compliant, ongoing chemotherapy, high-dose immunosuppressive therapy, incomplete maxillary/mandibular growth, allergies to implant material
what are indications of implants
tooth loss, replace tooth with hopeless prognosis
