Abstract：
The treatment of facial abscesses of dental origin is difficult as jaw osteomyelitis in rabbits is mainly associated with a thick caseous pus that is particularly difficult to drain. Precise identification of the teeth involved in the infected site with the use of cone beam computed tomography (CBCT) was expected to ensure a favorable surgical treatment plan without a long-term local antibiotic strategy or local marsupialization. The first part of the study compared multi-planar reconstruction (MPR) and 3D reconstruction complemented by a maximum intensity projection filter (MIP). The surgical part of the study included rabbits with documentation of the treatment outcome for a period greater than one month after surgery and having had at least one post-operative CBCT demonstrating the achievement of surgical extraction. MPR is significantly more efficient than MIP techniques for alveolar bone (P < 10-7), spongious bone (P < 10-10) and apical elongation (P < 10-5) parameters. Nineteen of 20 surgical sites gave radiological confirmation of the success of the surgical plan. Eighteen of 20 of the abscess sites were clinically healed within one month. Seven out of 20 of the abscess sites presented evidence of one dental structure regrowth following the CBCT recheck. Two out of these seven cases presented with a concomitant persistent chronic facial fistula. Both cases healed after second-stage surgery to extract the tooth structure. The mean number of teeth extracted was 2.85, and seven of the 20 procedures included one incisor.
摘要：
由于兔子的颌骨骨髓炎主要与特别难以排出的厚干酪脓液有关，因此很难治疗牙齿来源的面部脓肿。使用锥形束计算机断层扫描（CBCT）精确识别感染部位的牙齿，有望确保良好的手术治疗计划，而无需长期的局部抗生素策略或局部有袋化。研究的第一部分比较了多平面重建（MPR）和由最大强度投影滤波器（MIP）补充的3D重建。研究的手术部分包括兔子，在手术后超过一个月的时间内记录治疗结果，并且至少有一次手术后CBCT证明了手术摘除的成就。对于牙槽骨，MPR比MIP技术有效（P<10-7），海绵状骨（P<10-10）和根尖伸长（P<10-5）参数。20个手术部位中有19个放射学证实了手术计划的成功。20个脓肿部位中有18个在一个月内临床治愈。在CBCT重新检查后，20个脓肿部位中有7个表现出一个牙齿结构再生长的证据。这7例病例中有2例伴有持续性慢性面部瘘。两例均在第二阶段手术切除牙齿结构后愈合。平均拔牙数为2.85，20例手术中有7例包括一个门牙。
