Precision attachments/ orthodontic seminars
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Precision attachments/ orthodontic seminars
- 1. Precision attachments introduction INDIAN DENTAL ACADEMY Leader in continuing dental education www.indiandentalacademy.com www.indiandentalacademy. com
- 2. Defination: • This is said to be a connecting link between the fixed and removable type of partial dentures as it incorporates features common to both types of construction. • STEIGER &BOITEL: they mean to be of bodily function for a removable partial denture or bridge. www.indiandentalacademy. com
- 3. Nomenclature: • A retainer consisting of a metal receptacle (matrix) and a closely fitting part (patrix). • The matrix is usually contained within the normal / expanded contours of the crown on the abutment tooth. • The patrix is attached to a pontic / the removable partial denture frame work.- glossary of prosthodontic terms. www.indiandentalacademy. com
- 5. SYNONYM : • INTERNAL ATTACHMENT • PARALLEL ATTACHMENT • FRICTIONAL ATTACHMENT • KEY AND KEY WAY ATTACHMENT • SLOTTED ATTACHMENT www.indiandentalacademy. com
- 6. PRECISION ATTACHMENTS • IMPLIES A PARTLY or fully machined device consisting of a male and a female components which are used in restorative dentistry to retain a removable /semi removable prosthesis . –D.H. roberts . • Acc. To G.E.ray ,they are wholly or partially machined accessories used to retain a removable /semi removable prosthesis. www.indiandentalacademy. com
- 7. INTRA CORONAL ATTACHMENTS • The bulk of the soldered or cast on portion of the joint lies within the anatomical contours of the treated teeth. www.indiandentalacademy. com
- 8. EXTRA CORONAL ATTACHMENTS • Are used to join a prosthesis to a retainer , part of all of their mechanisms is outside the contour of the retainer . www.indiandentalacademy. com
- 10. HISTORY • GEORGE EVANS -1888 • PEESO -1898 • GILMORE -1913 • FOSSUME -1906 • BENNET -1904 • BROWN , BRYONT, CONDIT,GOLOBIN ,KELLY , McCOLLUM ,MORGAN , ROACH ,SORENSEN ,SUPPLEE . www.indiandentalacademy. com
- 12. RATIONALE • To be removable and replaceable without stress or strain on abutment teeth . • To permit normal anatomic contour to the abutment teeth . • To provide many years of comfortable service . • To be made of materials that are compatible with oral tissues . • Resistance to abrasion • Resistance to corrosion • To be esthetically acceptable • To require minimal amount of tooth structure to be removed • To be hygenically clean . www.indiandentalacademy. com
- 13. INDICATIONS • Movable joints in fixed movable bridge work . • To stress break , free- end saddles and bridges . • Intra coronal attachments are effective retainers for removable partial dentures . • As a connector for sectional dentures . • Sections of a F.P.D may be connected with intra coronal attachments • To lock a connector joining a saddle in the opposite side of the arch • to retain hybrid dentures www.indiandentalacademy. com
- 14. CONTRA INDICATIONS • SICK AND SENILE PATIENTS- whose manual skills are diminished. • Periodontosis. • Abnormal caries rate • Inadequate space to employ them / place them . www.indiandentalacademy. com
- 15. ADVANTAGES • The labial or buccal clasp arms can be eliminated • Precision attachments are less stressful to the abutment teeth than a conventional clasp arm . www.indiandentalacademy. com
- 16. DISADVANTAGES • TOOTH may have to be extensively cut to place the P.A . • The bulge in the crown , created by the intra coronal attachment may deprive the underlying gingival tissue of its customary massage . • The attachment is subject to wear as a result of friction between metal parts .- causing movement & injury to the abutment teeth . • The extra coronal attachment can cause irritation / inflamation . www.indiandentalacademy. com
- 17. LIMITATIONS • The clinical crown of the abutment tooth should be of adequate length • Size of the pulp tissue . • Fabrication of the P.A is technique sensitive . • It is expensive . www.indiandentalacademy. com
- 18. MECHANISIM OF ACTION • FRICTION – ACTIVE RETENSION CAN BE ENHANCED BY – spring ,leaf ,ring ,bolts ,rubber devices. • BINDING • WEDGING of conical bodies • INTERNAL SPRING • ACTIVE RETENSION www.indiandentalacademy. com
- 19. MATERIALS USED FOR MAKING THE P. A . • CERAMICOR • ELITOR • OSV • PIVITOR • STAINLESS STEEL • SILVER • LO-CAST • THERMAFIT • 20% IRIDIUM-PLATINUM • CERMACAST • PLATINUM GOLD , etc . www.indiandentalacademy. com
- 20. CLASSIFICATION Good kind &baker -1975 Intra coronal Extra coronal resilient Non resilient resilient Non resilient www.indiandentalacademy. com
- 21. Classification-2 PRECISION ATTACHMENTS Pre fabricated Semi precision Eg; Channel-shoulder-pin attachment Plastic Eg; Renefert’s unirestB , mortice rest www.indiandentalacademy. com
- 22. CLASSIFICATION -3 ACC . TO G.E.Ray Rigid articulatios Movable articulations Group-1 (vital teeth) Group-2 (non vital teeth) Group-1 –vital teeth Group-2 – non vital teeth www.indiandentalacademy. com
- 23. G.E.RAY – CLASSIFIED P. A - • INTRA CORONAL • EXTRA CORONAL –FLECHER , HUSER . • CONJUNCTORS –CUENOD , DALLA BONA , CRISMANI • ANCHORS – GMUR SLIDE BLOCK ,DALLABONA SLIDE BLOCK /DALBO STUD ANCHOR • BARS-DOLDER-BAR • ACCESSORY COMPONENTS –TRANSVERSE STABILIZERS,LOCKS,STRESS BREAKER. www.indiandentalacademy. com
- 24. Harold . W. preiskel classified as P.A Intra coronal attachments Frictional – Entirely frictional Mechanical lock Cross section – H-shaped T – shaped circular www.indiandentalacademy. com
- 25. R . VALENTINE & EASTMAN DENTAL HOSPITAL - LONDON CLASSIFIED AS : RIGID RETAINERS MOVABLE RETAINERS AUXILLARY DEVICES RIGID ATTACHMENTS( NON VITAL TEETH) ADJUSTABLE – CHAYES,MC COLLOM ,STREN , CRISMANI NON ADJUSTABLE – BEYELER , C&M-643 RIGID ATTACHMENTS (VITAL TEETH) ALL ADJUSTABLE –ECCENTRIC BONA ,GERBER MOVABLE ATTACHMENTS (NONVITAL) DALBO ,CRISMANI STRESS BREAKERS (PARTIAL DENTURES GERBER HINGE , ANCORVIS HINGE MOVABLE ANCHORAGES (NON VITAL ) BONA DOLDER BAR , ANDREWS BAR . ACTIVATORS - ISOCLIP LATCHES , BOLTS , SCREWS SCHUBIGER , HRUSKA www.indiandentalacademy. com
- 32. 15.41 – Dr.Dalla bona design – root canal anchor system www.indiandentalacademy. com
- 33. 15.42 – Prof.Dr. brunner design www.indiandentalacademy. com
- 43. Intra coronal , screwed slide attachment www.indiandentalacademy. com
- 47. Combi – snap –intra coronal attachment www.indiandentalacademy. com
- 50. Shoulder – dalbo joint with over load protection www.indiandentalacademy. com
- 52. Prospective planning in a bilateral free end saddle www.indiandentalacademy. com
- 53. Rest position – dalbo attachment www.indiandentalacademy. com
- 56. Articulated unilateral free end saddle www.indiandentalacademy. com
- 57. Articulated uni lateral free end saddle - mandibular www.indiandentalacademy. com
- 58. Pt – snap-intra coronal www.indiandentalacademy. com
- 72. Slide attachments – CM interlock &CM plasta www.indiandentalacademy. com
- 75. Slide attachment – cm interlock & G. crismani www.indiandentalacademy. com
- 79. w. Wermuth - bioloc www.indiandentalacademy. com
- 81. Dr spang mini - conex www.indiandentalacademy. com
- 104. PLACEMENT OF PRECISION ATTACHMENTS TECHNIQUE DIRECT METHOD INDIRECT METHOD www.indiandentalacademy. com