Sundqvist G, Johansson E, Sjögren U
J Endod. 1989 Jan;15(1):13-9. doi: 10.1016/S0099-2399(89)80092-5.
The prevalence of black-pigmented Bacteroides species in the root canals of 72 teeth with apical periodontitis was evaluated. Twenty-two of the canals contained one or more species of black-pigmented Bacteroides. Bacteroides intermedius (14 strains) and Bacteroides endodontalis (5 strains) were most common. Of the species Bacteroides gingivalis, Bacteroides loeschei, and Bacteroides denticola, 2, 3, and 1 strains, respectively, were isolated. The median number of bacterial cells recovered from the root canals containing black-pigmented Bacteroides was 2.8 x 10(5) and from the other canals 3.0 x 10(3). The mean number of strains was 7.9 and 3.3, respectively. Sixteen of the 22 root canals containing black-pigmented Bacteroides species were associated with acute apical abscesses and purulent drainage through the root canal. The other six teeth with black-pigmented Bacteroides were asymptomatic. One additional abscess was present among the 72 cases. This root canal contained Actinomyces israelii and Actinomyces naeslundii.
评估了72颗患有根尖周炎牙齿的根管中黑色色素类杆菌属的患病率。22个根管中含有一种或多种黑色色素类杆菌属。中间类杆菌（14株）和牙髓类杆菌（5株）最为常见。牙龈类杆菌、洛氏类杆菌和龋齿类杆菌分别分离出2株、3株和1株。从含有黑色色素类杆菌的根管中回收的细菌细胞中位数为2.8×10⁵，从其他根管中为3.0×10³。菌株平均数分别为7.9和3.3。22个含有黑色色素类杆菌属的根管中有16个与急性根尖脓肿以及通过根管的脓性引流有关。其他6颗含有黑色色素类杆菌的牙齿无症状。72例病例中还存在1例额外的脓肿。该根管含有衣氏放线菌和内氏放线菌。
