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Background <p>To improve the accuracy and efficiency of intentional replantation, we designed a novel intraoperative three-dimensionally printed device. This study aimed to evaluate its assistance in intentional replantation by comparing the accuracy and efficiency of the procedure performed with and without the device in extracted premolars and molars.</p> Methods <p>Twenty-two mandibular premolars and 18 mandibular molars were collected and equally divided into two comparable groups according to tooth type. In the experimental group, a novel three-dimensionally printed intraoperative device was used to enhance tooth stabilisation, and improve root-end resection and preparation accuracy. In the control group, a saline-soaked gauze was used to hold the crown. Accuracy was assessed by measuring the length and angle deviation of the root-end resection, and the angle deviation of the root-end preparation. Efficiency was evaluated based on operation time. Statistical analysis was conducted using SPSS software, with comparisons made using the Satterthwaite t-test and Mann–Whitney U test. Statistical significance was set at <i>P</i> &lt; 0.05.</p> Results <p>The angle deviations for root-end resection with premolars and molars in experimental group were significantly lower compared with those in control group (<i>P</i> &lt; 0.05). Analysis of the length deviations for root-end resection, the angle deviations for root-end preparation and the operation time between two groups revealed no significant differences with both tooth types.</p> Conclusions <p>The novel intraoperative device effectively supported intentional replantation without reducing operational efficiency. Furthermore, it improved root-end resection angle accuracy in both premolars and molars.</p>

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An in vitro study of a novel intraoperative 3D-printed device for intentional replantation

  • 期刊论文

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  • 发表日期：

    2025年11月27日

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  • Fangzhe Li,
  • Fushi Wang,
  • Ying Zhang,
  • Yeyu Lin,
  • Wenhui Tang,
  • Liuyan Meng

摘要

Background

To improve the accuracy and efficiency of intentional replantation, we designed a novel intraoperative three-dimensionally printed device. This study aimed to evaluate its assistance in intentional replantation by comparing the accuracy and efficiency of the procedure performed with and without the device in extracted premolars and molars.

Methods

Twenty-two mandibular premolars and 18 mandibular molars were collected and equally divided into two comparable groups according to tooth type. In the experimental group, a novel three-dimensionally printed intraoperative device was used to enhance tooth stabilisation, and improve root-end resection and preparation accuracy. In the control group, a saline-soaked gauze was used to hold the crown. Accuracy was assessed by measuring the length and angle deviation of the root-end resection, and the angle deviation of the root-end preparation. Efficiency was evaluated based on operation time. Statistical analysis was conducted using SPSS software, with comparisons made using the Satterthwaite t-test and Mann–Whitney U test. Statistical significance was set at P < 0.05.

Results

The angle deviations for root-end resection with premolars and molars in experimental group were significantly lower compared with those in control group (P < 0.05). Analysis of the length deviations for root-end resection, the angle deviations for root-end preparation and the operation time between two groups revealed no significant differences with both tooth types.

Conclusions

The novel intraoperative device effectively supported intentional replantation without reducing operational efficiency. Furthermore, it improved root-end resection angle accuracy in both premolars and molars.