PROSTHODONTICS III.pdf

REMOVABLE PARTIAL DENTURE CONTINUE WITH IMPORTANT QUESTIONS PROSTHODONTICS III ASST. PROF. DR. ŞERIFE KÖLE What is the name of the major connector? LINGUAL BAR Which majör connector do we use if...

REMOVABLE PARTIAL DENTURE CONTINUE WITH IMPORTANT QUESTIONS PROSTHODONTICS III ASST. PROF. DR. ŞERIFE KÖLE What is the name of the major connector? LINGUAL BAR Which majör connector do we use if the patient has the following features? The patient has lingual frenum is high or the space available for a lingual bar is limited, Residual ridges in Class-I arch in mandibula, which have undergone excessive vertical resorption and periodontally weakened anterior teeth. Lingual plate What is the name of the major connector? Anter-posterior palatal strap The patient has the following indication. Which major connectors do we use? upper maxillary Class III especially for Bilateral edentulous spaces of short span, which is entirely tooth- supported restoration Single Palatal Bar Single palatal strap Which upper major connector is used in patients with the following characteristics? Kennedy’s Class I,II and IV partial edentulous arches, which have excellent abutment support residual ridge. Inoperable tori that do not extend posteriorly. Anterior-posterior Palatal Strap What is the name of the major connectors? Palatal Plate U-shaped Palatal Connector What is the definition of support? The support derived from the abutment teeth through rests and the residual ridge through well-fitting bases. The definition is resistance to horizontal forces. Removable partial dentures must be stable against horizontal movement through rigid components like the reciprocal arm of the circumferential clasp and minor connector. What is the definition above? Stability How to ensure retention in removable partial dentures? Primary retention- (direct retainers) Secondary retention-It is proportionate to the accuracy of the impression registration, the accuracy of the fit of the denture bases, and the total involved area of contact. What is the Classification of direct retainers? What is the Components of clasp? 1. Rest – Provides 2. Body – Connects support for rest and clasp arms prosthesis to minor connector 4. Reciprocal arm: 3. Shoulder placed above the height of contour 5. Retentive arm: Provides direct 6. Approach arm retention below the height of the contour 7. Terminal end 8. Minor connector What is the Principles of Clasp Design? a) Retention b) Support c)Stabilization d)Reciprocation e) Encirclement f) Passivity  what is the Primary support and seconder units of a clasp ? Primary support units of a clasp are occlusal, lingual or Incisal rests, placed on properly prepared rest seats. Other components such as the reciprocal element or shoulder Which unit provides retention in removable partial dentures? RETENTIVE CLAPS ARMS WHAT ARE DEPENDS ON THE AMOUNT OF RETENTION PROVIDED BY A CLASP ASSEMBLY? The type of clasp used. Flexibility of the retentive arm Axial convergence of the tooth surfaces apical to the height of the contour Retentive force is increased when the clasp terminus engages an abutment that possesses : Greater horizontal undercut Greater angle of cervical convergence WHAT IS THE DEFINITION OF STABILIZATION FOR A REMOVABLE PARTIAL DENTURE? WHICH COMPONENT OF CLAPS provides the maximum stability? Stabilization is the resistance which the clasp contributes to displacement of the prosthesis in the horizontal plane shoulder of a cast circumferential clasp WHAT IS THE NAME OF THE CLAPS ARM Opposite each retaining terminal is capable of resisting any transient pressure exerted by the retaining arm during insertion and removal? HOW MUCH SHOULD THE ENCIRCLEMENT THE ABUTMENT TEETH THAT THE CLASP ASSEMBLY? clasp assembly must engage more than 180 degrees in the greatest circumference of the tooth. WHAT ARE THE FACTORS THAT DEPEND ON THE FLEXIBILITY OF THE CLASP ARM? Length of clasp arm: Increase the length of the clasp arm to increase its flexibility Diameter of clasp:The greater the average diameter of a clasp arm, the less flexible it will be Cross-sectional form of the clasp arm Clasp material The relative uniformity of retention Stabilizing-reciprocal cast clasp arm WHAT IS THE NAME OF CIRCUMFERENTIAL CLASPS / OCCLUSALLY APPROACHING? WHAT IS THE NAME OF Bar/ Roach clasps / Gingivally approaching clasps? WHAT IS THE REST DEFINITION? Rest is a rigid extension of a partial denture that rests on the occlusal, incisal, and lingual surfaces of a tooth. It is also a rigid stabilising extension of the P.D. that contacts the remaining tooth or teeth to dissipate vertical or horizontal forces. WHAT IS THE Types of Rests? Fill in the blanks below regarding rests. The angle formed by the occlusal rest & the vertical minor connector from which it originates should be at less than 90˚ It should cover 1/3 of the width of the marginal ridge. İt should be 1.5 mm deep Thank you