Sunday, October 26, 2014

Operative Practicals #1: MOD preparation and DO restoration with amalgam


#12 MOD Preparation



The preparation was made using a 330 bur for the occlusal surface and a 244 bur for the proximal boxes. 1.9mm green FenderWedges were placed in the interproximal spaces.

Good features of the preparation: 
- Isthmus Width: CD0 condenser fit and the CD1 did not
- Proximal: margins were free of contact from adjacent tooth and the gingival floor depth had a clearance of .5mm
- Pulpal Floor: appropriate depth of 1.5-1.7mm
- Axiopulpal line angle: rounded
- Adjacent tooth was not damaged

Features that need improvement: 
- Occlusal: Slight overextension/overextension and an atypical outline
- Proximal Box: slightly acute/obtuse cavosurface margins
- Buccal and Lingual walls are parallel or have minimal divergence


Image shows broken contact with adjacent teeth

Image shows broken contact with adjacent teeth














#13 DO Restoration 




A matrix band was used to create the restoration

The Good Features
- Contact: Optimal and allows POH floss to pass with resistance
- No damage to adjacent teeth
- Typodont is clean

The Features that need improvement 
- Margins: Moderate deficiency in DB, slight flash
- Proximal Contact: Contact is rough and contours are not continuous with existing tooth surfaces
- Surface Finish: Moderately rough, pitted and voids
- Contour: anatomy lacks definition and contour will cause high occlusion



Image shows bulky contact with adjacent tooth and not conforming to the structure of the tooth

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