Where should the prophy angle start during coronal polishing?

Starting the prophy angle near the gingival margin, close to the gingival sulcus, is essential for effective coronal polishing. This position allows for the removal of plaque and debris that accumulate at the gum line, which is critical for maintaining periodontal health. Polishing from this location ensures that areas most susceptible to plaque buildup are adequately addressed, helping to prevent gingival inflammation and other issues.

This technique supports the holistic approach of patient care by prioritizing the health of both teeth and gums. Additionally, initiating the polishing process close to the gingival margin ensures that the polishing agent can be evenly distributed over the tooth surfaces, allowing for optimal results in stain removal and polish.

The other choices do not focus on addressing the significant area where plaque typically accumulates, thereby missing a key aspect of effective polishing. Such an approach does not maximize the benefits of coronal polishing in promoting oral health.