Bianchi S D, Balma E, De Petro P, Lojacono A
Minerva Stomatol. 1997 Sep;46(9):443-55.
The extensive use of orthopantomography contributed to the occasional discovery of the so called empty cysts (EC) also defined as traumatic or hemorrhagic, which are benign mainly asymptomatic lesions. There are different opinions on empty cysts (even on the proper term to define them) particularly regarding their epidemiology, etiopathology, and clinical and radiological aspect. The purpose of this study is to compare the literature and personal experience and to underline the peculiar aspects not only from a semantic point of view, but also from a more elaborate perspective.
Forty-five osteolytic lesions, which can be considered as empty cysts, taken out of a group of 30,000 patients in a period of 5 years have been examined retrospectively. Radiologic documentation included: orthopantomography, occlusal radiographs, intraoral periapical radiographs, intraoral tube panoramic radiographs and TC in 4 cases. Several parameters among which: trauma, symptoms, location, dimension and the radiological aspect of the lesion were taken into account.
The authors concluded: trauma in 4 cases, location of 44 out of 45 empty cysts in the mandible, 67% of which distal to canines; displacement of adjacent teeth in four cases, without root resorbtion. The major axis of empty cysts varied from a minimum of 18 to a maximum of 80 mm. The morphology was oval or round, 37 cysts were monolocular, 8 were plurilocular. In 17 cases the authors noticed a reduction and a displacement of the corticals, but never discovered a pathological fracture. During the observed period an increase in growth of lesions was not found in the follow-up of 14 out of 44 patients.
The personal data were compared to those of the literature where the authors found a larger incidence of patients with symptoms and a history of trauma and cementofibrousdysplasia. The authors suggested that the real incidence of empty cysts is higher than that of the literature. On the basis of personal experience empty cysts are very stable. Therefore, it is questionable if oral surgery should be avoided when radiological picture is certain.
曲面断层片的广泛应用偶尔会发现所谓的空囊肿（EC），也被定义为创伤性或出血性囊肿，它们是主要无症状的良性病变。关于空囊肿（甚至关于定义它们的恰当术语）存在不同观点，特别是在其流行病学、病因病理学以及临床和放射学方面。本研究的目的是比较文献和个人经验，并不仅从语义角度，而且从更详尽的角度强调其独特方面。
回顾性检查了在5年期间从30000例患者中取出的45个可视为空囊肿的溶骨性病变。放射学记录包括：曲面断层片、咬合片、口内根尖片、口内管全景片以及4例患者的CT。考虑了几个参数，其中包括：创伤、症状、位置、大小以及病变的放射学表现。
作者得出结论：4例有创伤，45个空囊肿中有44个位于下颌骨，其中67%位于尖牙远中；4例相邻牙齿移位，无牙根吸收。空囊肿的长轴最小为18mm，最大为80mm。形态为椭圆形或圆形，37个囊肿为单房，8个为多房。17例中作者注意到皮质骨有吸收和移位，但未发现病理性骨折。在观察期间，44例患者中有14例随访未发现病变生长增加。
将个人数据与文献数据进行比较，作者发现有症状以及有创伤和骨纤维结构不良病史的患者发病率更高。作者认为空囊肿的实际发病率高于文献报道。基于个人经验，空囊肿非常稳定。因此，当放射学表现明确时是否应避免口腔手术值得怀疑。
