Grewal Navneet, Sharma Neha, Chawla Sarika
Department of Pedodontics and Preventive Dentistry, Punjab Government Dental College and Hospital, Amritsar, Punjab, India.
J Indian Soc Pedod Prev Dent. 2018 Jul-Sep;36(3):262-267. doi: 10.4103/JISPPD.JISPPD_140_17.
Complete pulpectomy and elimination of wide range of microorganisms from infected primary root canals is not possible through conventional endodontic procedures. Thus, lesion sterilization and tissue repair (LSTR) therapy employing 3Mix tri-antibiotic paste have been used as an alternative endodontic modality for infected primary teeth.
This study aims to evaluate the root resorption rate of endodontically treated mandibular primary molars with conventional endodontic treatment or LSTR therapy and to compare it with their healthy contralateral teeth.
Fifty carious first and second primary mandibular molars from 25 healthy children aged 7-10 years were treated with two different endodontic procedures using LSTR Therapy and conventional endodontic treatment. The resorption rate of these teeth with healthy contralateral teeth was compared clinically and radiographically at 3, 6, 12 and 36 months using Chi-square test.
At 12 months, clinically, there was no difference in the outcomes of both groups but radiographically, statistically significant difference (P < 0.001) in root resorption between treated teeth and their controls in both the groups was observed. At 36 months, interradicular bone resorption around the crown of succedaneous teeth and their delayed eruption was noted in LSTR group.
LSTR therapy could be a viable treatment modality for infected/nonvital primary molars with poor prognosis and intended to be maintained for shorter duration in the oral cavity as natural space maintainers.
通过传统的牙髓治疗方法，不可能完成牙髓摘除术并清除感染的乳牙根尖周广泛的微生物。因此，采用3Mix三联抗生素糊剂的病变消毒和组织修复（LSTR）疗法已被用作治疗感染乳牙的一种替代牙髓治疗方式。
本研究旨在评估采用传统牙髓治疗或LSTR疗法进行牙髓治疗的下颌乳磨牙的牙根吸收速率，并将其与对侧健康牙齿进行比较。
选取25名7至10岁健康儿童的50颗龋坏的下颌第一和第二乳磨牙，采用LSTR疗法和传统牙髓治疗这两种不同的牙髓治疗方法进行治疗。使用卡方检验在3、6、12和36个月时对这些牙齿与对侧健康牙齿的吸收速率进行临床和影像学比较。
在12个月时，临床上两组的治疗结果没有差异，但在影像学上，两组治疗牙齿与其对照牙齿之间的牙根吸收存在统计学显著差异（P < 0.001）。在36个月时，LSTR组观察到继承恒牙冠周围的根间骨吸收及其萌出延迟。
对于预后不良且打算在口腔中作为天然间隙保持器维持较短时间的感染/无活力乳磨牙，LSTR疗法可能是一种可行的治疗方式。
