Okaguchi Dental Clinic, Tokyo, Japan.
Elite Dental Clinic, Taipei, Taiwan; School of Dentistry, National Taiwan University, Taipei, Taiwan; Department of Dentistry, National Taiwan University Hospital, College of Medicine, National Taiwan University, Taipei, Taiwan.
J Formos Med Assoc. 2019 Mar;118(3):671-678. doi: 10.1016/j.jfma.2018.08.004. Epub 2018 Aug 23.
BACKGROUND/PURPOSE: Vertical root fracture (VRF) is a complication in endodontically treated teeth. This study aimed to assess the clinical outcomes of treatment of 6 VRF teeth with intentional replantation and root fragment bonding with 4-methacryloxyethyl trimellitate anhydride/methyl methacrylate-tri-n-butyl borane (4-META/MMA-TBB) resin.
A series of 6 complete VRF teeth (one incisor, one canine, one premolar, and 3 M) were treated through intentional replantation and root fragment bonding with 4-META/MMA-TBB resin.
This study included 6 VRF teeth in 6 patients (one man and 5 women; mean age, 44 ± 8 years). All 6 teeth had VRF in the bucco-lingual direction and one tooth had concomitant VRF in the mesio-distal direction. The root thickness was classified as thick in all 6 teeth. Of the 6 VRF teeth, 4 had biting, percussion, or palpation pain, 4 had gingival swelling, 3 had sinus tracts, 3 had discomfort, and one had tooth mobility. Radiographically, 5 of the 6 teeth had periradicular radiolucent lesions, 4 of which exhibited complete regression and one of which exhibited nearly complete regression after root fragment bonding therapy. Because all 6 treated teeth exhibited sound function in the oral cavity after a follow-up period ranging from 33 to 74 (mean, 50 ± 15) months, the clinical outcomes were all considered to be successful.
For a VRF tooth, in addition to tooth extraction, intentional replantation combined with root fragment bonding with 4-META/MMA-TBB resin is a successful treatment modality that can be used to preserve a complete VRF tooth.
背景/目的：垂直根折（VRF）是根管治疗后牙齿的一种并发症。本研究旨在评估 6 例 VRF 牙经蓄意再植并用 4-甲氧基丙烯酸乙酯三甲基丙烯酸酯/甲基丙烯酸甲酯-三丁基硼烷（4-META/MMA-TBB）树脂粘结根折碎片治疗的临床效果。
一系列 6 例完全性 VRF 牙（1 颗切牙、1 颗尖牙、1 颗前磨牙和 3 颗磨牙）通过蓄意再植并用 4-META/MMA-TBB 树脂粘结根折碎片进行治疗。
本研究纳入了 6 例 VRF 牙的 6 例患者（1 例男性，5 例女性；平均年龄 44 ± 8 岁）。所有 6 颗牙均为颊舌向 VRF，1 颗牙同时有近远中向 VRF。所有 6 颗牙的根厚度均为厚型。6 例 VRF 牙中，4 例有咬合、叩诊或触诊痛，4 例有牙龈肿胀，3 例有窦道，3 例有不适感，1 例有牙齿松动。影像学检查显示，6 例 VRF 牙中有 5 例有根尖周放射性透光区，其中 4 例经根折碎片粘结治疗后完全消退，1 例几乎完全消退。由于 6 例治疗牙在随访 33 至 74 个月（平均 50 ± 15 个月）后在口腔内均功能良好，所有病例的临床效果均被认为是成功的。
对于 VRF 牙，除了拔牙外，采用 4-META/MMA-TBB 树脂的蓄意再植联合根折碎片粘结也是一种成功的治疗方法，可以保留完整的 VRF 牙。
