Related Experiment Video
Updated: Sep 18, 2025
Guided Endodontics: Three-Dimensional Planning and Template-Aided Preparation of Endodontic Access Cavities
Published on: May 24, 2022
A novel sleeveless guided system for reducing thermal injury in endodontic microsurgery with enhanced accuracy and
Moran Jin1, Rentao Tang1, Zeqian Pan1
1Department of Cariology and Endodontology, National Engineering Laboratory for Digital and Material Technology of Stomatology, Peking Key Laboratory of Digital Stomatology, Peking University School and Hospital of Stomatology, Beijing, 100081, China.
Objectives:
This study evaluated surgical temperature, accuracy, and efficiency in endodontic microsurgery (EMS) using the sleeveless guided system.
Materials And Methods:
Sleeveless and sleeve guided systems were fabricated. Thermocouples were used to measure temperature changes during guided preparation in models (n = 5) featuring bone blocks installed in anterior, premolar, and molar regions. 72 teeth in 6 EMS models used for simulating the clinical scenario of endodontic microsurgery were equally randomized into 6 groups by guide type (sleeveless/sleeve/freehand) and operator experience, with each group containing matched dentition (2 anterior/2 premolar/2 molar teeth per arch; n = 12). Preoperative and postoperative models were superimposed using 3-matic Medical evaluate preparation accuracy, with surgical duration compared for efficiency. Temperature data were analyzed via t-test; accuracy and efficiency were assessed using two-way ANOVA.
Results:
The sleeveless guided system demonstrated significantly lower surgical area temperatures than the sleeve guided system (P < 0.001). Compared to freehand, it reduced three-dimensional (3D) deviation by 1.14 mm (52.8%), angular deviation by 4.06° (49.6%), and surgical time by 40.5 s (P < 0.05). When using sleeveless system, experienced operators exhibited reductions of 0.65 mm in 3D deviation and 4.51° in angular deviation, whereas inexperienced operators demonstrated larger reductions of 1.96 mm and 5.79° respectively. No significant differences were observed between guide systems in accuracy or efficiency (P > 0.05).
Conclusion:
The sleeveless guided system effectively reduces heat generation and enhances surgical accuracy and efficiency compared to freehand techniques significantly, with performance comparable to the sleeve guided system.
Clinical Relevance:
The sleeveless guided system demonstrates promising applications in EMS.
