Northwestern University Dental School DDS graduate (1989) Dr. David Rens, DDS runs San Diego Smile Makers as a husband-wife practice with Dr. Ann Marie Zimmerman in the Hillcrest medical-dental district at 4103 Third Ave. Surgical extractions and impacted wisdom teeth are referred to oral and maxillofacial specialists like McGann Oral Surgery while restorative work stays in-house. The practice added CEREC CAD/CAM milling in 2009, which allows porcelain inlays, onlays, and crowns to be designed, milled, and seated in a single visit instead of the traditional two-week temporary-crown wait. Rens and Zimmerman took over the Hillcrest operatory in 1994 and have run it as a husband-wife team since, with both doctors sharing chair time across general, restorative, and cosmetic cases. Orthodontic correction beyond cosmetic-aligner scope is referred to Milberg Orthodontics for fixed-appliance treatment with brackets and wires. Full-mouth reconstructions combining CEREC ceramic restorations across multiple quadrants in a single workflow represent the practice's most complex in-office case type.