Prasad P Narayana, Sharma Kanika, Anwer Nazia, Arya Gaurav, Parthi Aiyana, Kumar Ashish, Meshram Mrunal
Department of Orthodontics and Dentofacial Orthopaedics, Seema Dental College and Hospital, Rishikesh, Uttarakhand, India.
Department of Dentistry, Government Medical College, Haridwar, Uttarakhand, India.
J Pharm Bioallied Sci. 2025 May;17(Suppl 1):S825-S827. doi: 10.4103/jpbs.jpbs_607_25. Epub 2025 May 10.
Different modalities of orthodontic treatment (OT) can have different amounts of external resorption of root (ERR) among root canal obturated teeth (ROT) having zirconia crowns and teeth with vital pulp (VPT).
This study was carried out to evaluate ERR in different modalities of OT in ROT having zirconia crowns and contralateral teeth with vital pulp.
130 patients having ROT with zirconia crowns and contralateral teeth with vital pulp undergoing OT were included. 65 patients underwent extraction orthodontic treatment (EOT), and 65 patients underwent non-extraction orthodontic treatment (NEOT). Cone beam computed tomography was used for calculating ERR.
The ERR values in ROT with zirconia were 0.48 ± 0.64 mm in NEOT, while the ERR values in VPT were 1.41 ± 1.20 mm in NEOT. The ERR values were greater in VPT in NEOT as well as EOT ( = 0.001).
The external root resorption values were greater in vital teeth as compared to root obturated teeth with zirconia in different orthodontic treatment modalities.
在戴氧化锆冠的根管充填牙（ROT）和活髓牙（VPT）中，不同的正畸治疗（OT）方式可能导致不同程度的牙根外吸收（ERR）。
本研究旨在评估戴氧化锆冠的ROT及对侧活髓牙在不同正畸治疗方式下的ERR情况。
纳入130例戴氧化锆冠的ROT及对侧活髓牙并接受正畸治疗的患者。65例患者接受拔牙正畸治疗（EOT），65例患者接受非拔牙正畸治疗（NEOT）。采用锥形束计算机断层扫描来计算ERR。
在NEOT中，戴氧化锆冠的ROT的ERR值为0.48±0.64mm，而在NEOT中VPT的ERR值为1.41±1.20mm。在NEOT和EOT中，VPT的ERR值均更高（P = 0.001）。
在不同的正畸治疗方式下，活髓牙相比戴氧化锆冠的根管充填牙，其牙根外吸收值更高。
