Established in 1984 as one of Southern California's earliest biological dental practices, Natural Dental Arts (listed under the Zakarian Andrew DDS business name) operates from 3501 Fourth Ave in Hillcrest's 92103 corridor. The treatment protocol centers on safe amalgam removal under the Huggins protocol — historically the only Huggins-trained chair south of Los Angeles — with biocompatibility testing referenced before any restorative material is placed and periodontal surgery routed to Hillcrest Periodontal Health: Grant Danielle A DDS. Hygiene runs fluoride-free with herbal substitutions, and mercury-free composites and metal-free ceramic restorations replace amalgam and gold work when older fillings are excavated. Orthodontic alignment cases for adult Invisalign and bracket work are sent to Park View Orthodontics, since the biological-only model excludes in-house tooth movement. The most involved appointments are full-mouth amalgam-removal sequences run under rubber dam isolation and high-volume external suction, with new biocompatible restorations placed across two to four visits guided by Clifford or BioComp material-sensitivity test results.