Rossdale and Partners, Rossdales Equine Hospital, Cotton End Road, Exning, Suffolk CB8 7NN, UK.
Equine Vet J. 2010 Mar;42(2):124-8. doi: 10.2746/042516409X478488.
Fissures of the occlusal surface of the equine cheek tooth are poorly understood and their association with dental disease is unknown.
To describe the prevalence and location of occlusal fissures in the cheek teeth (CT) of a group of horses referred for dental investigation/treatment, and determine association with intercurrent dental disease.
Digital video recordings of oral endoscopic examinations for all horses referred to the Rossdales Equine Hospital for dental investigation from November 2006 to June 2009 were reviewed. Location of occlusal fissures in relation to both Triadan tooth position and pulpar secondary dentine was recorded; direction of fissure and concurrent involvement of enamel was also documented. The CT location considered at the time of examination to be the primary site/s of disease was correlated with presence of fissures on these teeth.
91 cases meeting the inclusion criteria were identified. Occlusal fissures were documented in 58.2% (53/91) cases, with a total of 227 CT being affected. Fissures were most prevalent mid-arcade. The majority (92.1%) of fissures in maxillary CT were associated with the caudal palatal pulp horn. Fissures in mandibular CT were predominantly associated with the buccal pulp horns (95.7%). There was no significant difference in the median number of CT with fissures in relation to gender. There was no correlation between age (r(2)= 0.01) of horse and number of CT with fissures. A significantly greater number of CT with multiple occlusal fissures was found in mandibular compared to maxillary arcades. No correlation was found between presence of fissures and location of individual CT considered to be primarily responsible for presentation.
Occlusal fissures in this group of animals were common and not correlated to primary site of dental disease.
In horses subjected to dental investigation, occlusal fissures of the cheek teeth should not be considered an indicator of tooth compromise. Location and direction of fissure propagation in most cases is inconsistent with occlusal fissures being causally implicated in slab fractures of cheek teeth, although site predilection may indicate a possible association with masticatory forces.
马的颊齿咬合面的裂缝理解甚少，其与牙齿疾病的关系尚不清楚。
描述一组因牙科检查/治疗而转诊的马的颊齿（CT）的咬合裂缝的患病率和位置，并确定与并发牙科疾病的关联。
对 2006 年 11 月至 2009 年 6 月间转诊到罗斯代尔马医院进行牙科检查的所有马的口腔内窥镜检查的数字视频记录进行了回顾。记录了咬合裂缝在 Triadan 牙齿位置和牙髓次生牙本质之间的位置；裂缝的方向和同时涉及的釉质也被记录下来。在检查时被认为是主要病变部位的 CT 位置与这些牙齿上存在裂缝相关联。
确定了符合纳入标准的 91 例。58.2%（53/91）例存在咬合裂缝，共有 227 颗 CT 受影响。裂缝最常见于中弓。上颌 CT 中的大多数裂缝（92.1%）与腭侧牙髓角有关。下颌 CT 中的裂缝主要与颊侧牙髓角有关（95.7%）。在与性别有关的 CT 数量方面，没有显著差异。马的年龄（r(2)=0.01）与有裂缝的 CT 数量之间没有相关性。下颌 CT 中存在多个咬合裂缝的数量明显多于上颌 CT。在存在裂缝和被认为是主要病变部位的个体 CT 之间没有发现相关性。
在这群动物中，咬合裂缝很常见，与牙齿疾病的主要部位无关。
在接受牙科检查的马匹中，颊齿的咬合裂缝不应被视为牙齿受损的指标。在大多数情况下，裂缝的位置和方向与咬合裂缝导致颊齿板状骨折的说法不一致，尽管部位偏好可能表明与咀嚼力之间存在可能的关联。
