Preventive dental care coverage under Delta Dental of California typically includes services such as regular check-ups, cleanings, and X-rays. Most plans allow for preventive services to be covered at a frequency of once every six months. This means that you can generally receive two comprehensive dental exams and cleanings annually without any out-of-pocket costs, as long as you adhere to the plan guidelines. It is important to note that the specifics may vary based on the individual plan you have chosen. Therefore, you may want to review your plan documents or check the detailed information available on the current Delta Dental of California web page to understand the exact benefits and limitations of your coverage. This way, you can ensure that you make the most of your preventive dental care benefits while maintaining your oral health.