Peña-Bengoa Fernando, Cáceres Carolina, Niklander Sven-Eric, Meléndez Patricio
Departament of Endodontics, Dentistry Faculty, Universidad Andres Bello, Viña del Mar, Chile.
Unit of Oral Pathology and Medicine, Dentistry Faculty, Universidad Andres Bello, Viña del Mar, Chile.
J Clin Exp Dent. 2023 Mar 1;15(3):e173-e176. doi: 10.4317/jced.60156. eCollection 2023 Mar.
To determine the frequency of missed second mesiobuccal canals (MB2) and apical periodontitis in maxillary molars of a Chilean subpopulation using cone beam computed tomography (CBCT).
Two previously calibrated operators evaluated CBCTs with a total of 588 upper molars, of which 179 endodontically treated molars were selected. Axial tomographic slices were used to study the frequency and association between the presence of apical periodontitis and untreated MB2 canals.
Of the 179 endodontically treated molars, 45.78% (84) presented MB2 missed canals. Of the upper molars that presented MB2 missed canals, 70% were associated with apical periodontitis, which was statistically significant (< 0.0001). Sixty-two corresponded to first molars (74%) and 22 to second molars (26%). Of the first molars, 34 (54.8%) presented with apical periodontitis and MB2 missed canals (< 0.0001), while 12 (54.4%) of the second molars presented this association ( = 0.081).
MB2 missed canals are associated with a high degree of apical periodontitis and may be an important predictor of endodontic prognosis of upper molars. Endodontics, apical periodontitis, cone beam computed tomography, missed canals, maxillary molars.
使用锥形束计算机断层扫描（CBCT）确定智利亚人群上颌磨牙中第二近中颊根管（MB2）遗漏及根尖周炎的发生率。
两名预先校准的操作人员评估了总共588颗上颌磨牙的CBCT，其中选择了179颗接受过根管治疗的磨牙。使用轴向断层扫描切片研究根尖周炎的存在与未治疗的MB2根管之间的发生率及相关性。
在179颗接受过根管治疗的磨牙中，45.78%（84颗）存在MB2根管遗漏。在存在MB2根管遗漏的上颌磨牙中，70%与根尖周炎相关，具有统计学意义（<0.0001）。62颗为第一磨牙（74%），22颗为第二磨牙（26%）。在第一磨牙中，34颗（54.8%）存在根尖周炎且MB2根管遗漏（<0.0001），而在第二磨牙中，12颗（54.4%）存在这种关联（P = 0.081）。
MB2根管遗漏与高度的根尖周炎相关，可能是上颌磨牙根管治疗预后的重要预测指标。根管治疗、根尖周炎、锥形束计算机断层扫描、遗漏根管、上颌磨牙。
