Int J Med Robot - Mechatronic assistant system for dental drill handling.


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CKGROUND: Holding a dental tool for many hours of work is reflected in fatigue and manual tremor, which causes bad handling of rotatory instruments and consequently injuries within the buccal cavity. At present there exists no system to help the medical dentist in the support and handling of the dental drill. We propose the use of a mechatronic system to help the odontologist in handling the dental drill.METHODS: The mechatronic system consists of an articulated arm with force sensors and actuators that are activated electronically. The mechanism was developed so that the handpiece is held simultaneously by the mechatronic arm and the hand of the dentist. Expert dentists and odontology students were asked to execute tasks to assess positioning accuracy and system resolution. Students performed positioning tasks to evaluate adaptation to the system. The subjects drew the contour of a circle with and without the mechatronic assistant to assess positioning accuracy. Similarly, they made cavities on acrylic typodonts to evaluate resolution and accuracy. Adaptation to the system was evaluated by inserting the drill burr into cavities previously made.RESULTS: The mechatronic system provides support and stability while handling the dental drill. The threshold of force required to move the mechanism prevents involuntary movements affecting the quality of work made on cavities. Positioning accuracy was improved by 53% (p < 0.017) using the system. Similarly, resolution of drilling was improved by 76% (p < 0.001).CONCLUSION: We have developed the first mechatronic system to assist dentists in handling the dental drill. The arm allows the dentist to manipulate the tool with smooth and precise movements during the preparation of dental cavities with the application of force. The mechatronic system minimizes manual tremor due to fatigue and reduces the risk of iatrogenic dental injuries.

Resumo Limpo

ckground hold dental tool mani hour work reflect fatigu manual tremor caus bad handl rotatori instrument consequ injuri within buccal caviti present exist system help medic dentist support handl dental drill propos use mechatron system help odontologist handl dental drillmethod mechatron system consist articul arm forc sensor actuat activ electron mechan develop handpiec held simultan mechatron arm hand dentist expert dentist odontolog student ask execut task assess posit accuraci system resolut student perform posit task evalu adapt system subject drew contour circl without mechatron assist assess posit accuraci similar made caviti acryl typodont evalu resolut accuraci adapt system evalu insert drill burr caviti previous maderesult mechatron system provid support stabil handl dental drill threshold forc requir move mechan prevent involuntari movement affect qualiti work made caviti posit accuraci improv p use system similar resolut drill improv p conclus develop first mechatron system assist dentist handl dental drill arm allow dentist manipul tool smooth precis movement prepar dental caviti applic forc mechatron system minim manual tremor due fatigu reduc risk iatrogen dental injuri

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