When should subgingival margins for crown preparations be considered?

When should subgingival margins for crown preparations be considered?

Subgingival margin placement is necessary for several reasons: to hide the margin on a discolored tooth, to hide the margin when a more opaque restoration is placed, to chase old restorations or decay, and sometimes to increase the amount of tooth structure for the restoration.

What is a subgingival margin?

Subgingival margins very often mean bleeding gums, isolation problems, and the absence of a margin in enamel. With direct restorations, when margins are subgingival, placement of a matrix band, achieving isolation, and removing any excess material all become considerably more complex.

What dictates subgingival margin placement?

The placement of supragingival or equigingival margins is simple, as these margins require no tissue manipulation. The amount of tooth reduced incisally or occlusally, as well as facially, lingually and interproximally, will be dictated by the choice of restorative materials.

How do you do subgingival scaling?

For subgingival scaling with hand instruments, use a subgingival curette (e.g. Gracey curette SG 11/12 or 13/14). Place the blade at 45°-90° to the root surface and pull firmly against the tissue to remove as much debris and chronically inflamed tissue as possible.

What is subgingival cleaning?

Subgingival cleaning – Oral irrigation is an extremely safe and effective way to flush out bacteria and other toxins trapped underneath the gum line. Antimicrobial treatment – Antimicrobial substances are often combined with the water during oral irrigation and applied under the gum line to eliminate harmful bacteria.

What’s the difference between subgingival and Supragingival?

The parts of your hand and wrist that extend visibly outside the sleeve would be considered supragingival (above the gumline), whereas anything unseen below the sleeve would be considered subgingival (below the gumline).

What is subgingival?

Subgingival means below the gum line (sub = below, gingival = of or relating to the gums). Calculus is a form of hardened dental plaque. It is caused by the condensation of saliva minerals and the fluid produced in the crevices of our gums.

What scaler is used for subgingival calculus?

Indication of use and function A universal curette is a double-ended instrument used for periodontal scaling, calculus debridement and root planing. The purpose of the universal curette is to remove small or medium size calculus deposits and can be used both supragingivally and subgingivally.

What is subgingival tartar?

Tartar that accumulates on your teeth above the gumline and is easily seen by your dentist or dental hygienist is called supragingival calculus, according to the IJDHS article. But the tartar that forms below the gumline — and is therefore not immediately visible — is known as subgingival calculus.

What is the Colour of subgingival calculus?

Subgingival calculus is most often brown, black or green in color from its chronic exposure to gingival crevicular fluid, blood and blood breakdown products. It is frequently associated with the development of the pyogenic granuloma, an epulis-like lesion on the gingiva.

What are the steps in the Crown process?

The steps of the dental crown procedure. – 1 The steps of the crowning process Since most patients’ procedures are scheduled as two separate… 2 A) The initial (tooth preparation) appointment. Step 1: Numbing your tooth up. 3 B) The crown placement appointment. Once the fabrication…

How long does it take to prepare a tooth for a crown?

The first appointment involves: 1) Preparing (shaping) the tooth, 2) Taking its impression and 3) Placing a temporary crown. The time needed to perform these steps typically ranges from 50 to 90 minutes.

When do you know where to place subgingival margins?

When treatment planning for subgingival margin placement, it is very important to be aware of your patient’s sulcus depth. Knowing how to prep your patient’s teeth and where to place the gingival margins is essential if you want a predictable and esthetic final result.

How does a dentist remove a crown from a tooth?

– Your dentist will seat the crown on your tooth and inspect the way that it fits. (This evaluation may include using dental floss, feeling around the crown with a dental tool, and asking you to bite down gently on some carbon [marking] paper). They’ll then remove the crown and adjust it as needed.