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STAINLESS STEEL CROWNS

SHAN LAL , DDS

Director, Pre-clinical Programs

Pediatric Dentistry

SSC- Primary and Permanent

Full coverage, metallic,definative restorations

Available as:pretrimmed (Unitek),precontoured andfestooned (Ni-Chro IONcrowns)

Durable and costeffective

Indications for use of SSC

Restoration of primary and young permanentteeth with multiple carious surfaces.

Class 2 lesions where the caries extendbeyond the anatomic line angles.

Restoration of primary teeth after pulpotomyor pulpectomy procedures.

Hypoplastic teeth.

Hereditary anomalies (D.I., A.I.) Pts. with special needs.

As an abutment for space maintainers orprosthetic appliances.

Steps of preparation andplacement of SSC

Evaluate pre-operative occlusion

Administer appropriate local anesthesia*

Place rubber dam (clamp adjacent tooth)

Removal of caries (if present)

Crown preparation

Selection and trial placement of SSC

Contour and crimp (if necessary) Evaluate post-operative occlusion

Cementation

Crown preparation

Occlusal reduction

Inter-proximal

Buccal and Lingual (limited to occl 1/3)

Occlusal reduction

169L tapered fissure bur

Place depth cuts and uniformly reduceocclusal surface by 1-1.5mm.

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Occlusal Reduction Proximal Reduction

169L tapered fissure or thin tapereddiamond bur.

Break proximal contacts at appropriatedepth in single sweeping motion.

Vertical proximal walls with slightconvergence in an occlusal direction.

Feather-edge finish line.

Common error - ledge formation.

Proximal Reduction SSC - Crown Preparation

Buccal and Lingual Reduction

169L or diamond bur

Limited to occlusal 1/3as a 45 bevel.

Round off all lineangles.

Occasionally, anexagerrated mesio-buccal or cervical bulgemay warrant morebuccal and lingualreduction.

Crown selection and Try-in

SELECT smallest crownthat restores pre-existing proximalcontacts.

Occlusal dimensions of

SSC should be same aspre-op. tooth.

Most commonly usedmolar SSC is size 4.

PLACE or seat crownfrom lingual to buccal.

Push crown over thebuccal bulge for a snapfit.

Check margins for closecervical adaptationextending 1mmsubgingivally.

Blanching effect

Remove dam and checkocclusion.

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SSC - primary molar

Linguo-buccalseating of crown.

Snap fit.

Crimping and contouring

Crimping andContouring involvesbending the gingival 1/3of the crowns marginsinward to establish atight marginal fit andadaptation.

Pliers - #114, 417

ION crowns requireleast adjustments.

Crown cementation

Rinse and dry crown

Prepare glass ionomercement and fill crown to2/3 with all innersurfaces covered.

Seat crown completely

Remove excess cementfrom margins

Rinse and floss inter-proximal areas

Check occlusion

Cementation

Remove excesscement.

SSC - primary molar SSC - Primary molar

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SSC - Primary molar