PROBLEM TO BE SOLVED: To provide a system capable of efficiently assisting or supporting medical care of a medical doctor instead of a dental assistant in a medical care and operation of dental or oral surgery.SOLUTION: A dental aid system 1 comprises: a dental aid 10 with an opening means for keeping the oral cavity of a patient open widely; and a bowl-shaped robot 3 with a control device 50 for controlling the opening means. The opening means includes: a retractor 20 which pushes and opens a corner of the patient's mouth, the corner being on a side of a part being treated; and a blade 30 which presses and holds the patient's tongue onto a side opposite from the part being treated.SELECTED DRAWING: Figure 1COPYRIGHT: (C)2020,JPO&INPIT【課題】歯科又は口腔外科の診療・施術において、歯科助手に代わり、医師の診療を効率的に補助又は支援することができるシステムを提供すること。【解決手段】 歯科補助システム1は、患者の口腔を広く開けた状態に保持するための開口手段を備えた歯科補助具10と、前記開口手段を制御する制御装置50を備えた椀型ロボット3とから構成される。開口手段は、患者の治療部位側の口角部分を押し広げるリトラクター部20と、患者の舌を治療部位とは反対側に押し留めるブレード部30とを備えている。【選択図】図1