1. Contacts should be football-shaped and located below the marginal ridge. The ROE standard is to establish broad, rather than point contact. Note how the surface area of the contact is approximately 1/3 the width of the occlusal table. The ROE standard for tightness is for the restoration to “hold” shim stock (12 microns) when fully seated on the solid model.
2. Some dentists request extra broad contacts and want contours as shown from this occlusal view. X and Z show ideal contour while W and Y show “extra-broad” contact. The image to the lower left shows the proximal view, and the outline in red indicates the broadened contact.
4. Proximal surfaces gingival to the contacts should be contoured so the embrasure is symmetrical and triangular in shape, as indicated in red. 
5. This diagram shows an under-contoured buccal embrasure as indicated by Y. Proper contour is shown with the dotted line indicated by X. 
6. From a gingival–occlusal perspective, contacts are positioned as shown. Maxillary posterior contacts move progressively towards the gingiva as they move away from the midline, while mandibular posterior contact points are at the same general level or plane. Special thanks to Dr. William Sweeney Jr. for his contribution to this article.
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