Rehrl S, Schröder W, Müller C, Staszyk C, Lischer C
Equine Clinic: Surgery and Radiology, Department of Veterinary Medicine, Freie Universität Berlin, Berlin, Germany.
Tierärztliche Klinik für Pferde und Kleintiere Isernhagen, Isernhagen, Germany.
Equine Vet J. 2018 Jul;50(4):481-487. doi: 10.1111/evj.12776. Epub 2017 Nov 27.
Equine odontoclastic tooth resorption and hypercementosis (EOTRH) is a painful and progressive dental disease that mainly affects the incisors and canine teeth of aged horses. Diagnosis is based on radiographs to detect early stages of the disease. EOTRH is probably underdiagnosed and its prevalence in Germany unknown.
This study was performed to determine the radiological prevalence of EOTRH in a large horse population in Berlin-Brandenburg, Germany.
Prevalence study.
The study population (142 horses) consisted of all horses 10 years and older that were presented at the Equine Hospital for a routine dental examination. The horses were either presented as clinical cases (CC population) or belonged to a riding school (RS population). Digital radiographs of the incisor dentition were taken and evaluated for changes related to EOTRH, leading to an overall classification for each horse.
The mean age of the study population was 21 years and ranged from 10 to 37 years. Overall, 94% of all horses had at least minor and 62% had moderate to severe radiological changes of the incisor teeth associated to EOTRH. No horse older than 14 years was without radiological signs of EOTRH and all horses over 28 years of age had at least moderate radiological changes of the incisor teeth.
The clinical cases group might have a bias towards horses with existing dental problems such as EOTRH, because they were presented explicitly for dental care to a clinic.
Focusing on radiological changes, this study shows that EOTRH is a common condition of horses in Berlin-Brandenburg. With older age, disease is more frequent and radiological changes become more severe. Since no horse older than 14 years was without radiological findings, it is likely that mild changes may be associated with the normal tooth ageing process.
马牙骨质吸收与牙骨质增生（EOTRH）是一种痛苦且渐进性的牙科疾病，主要影响老龄马的切齿和犬齿。诊断基于X光片以检测疾病的早期阶段。EOTRH可能未得到充分诊断，其在德国的患病率未知。
本研究旨在确定德国柏林-勃兰登堡一大群马匹中EOTRH的放射学患病率。
患病率研究。
研究群体（142匹马）包括所有10岁及以上因常规牙科检查而就诊于马医院的马匹。这些马匹要么作为临床病例（CC群体）就诊，要么属于一所骑术学校（RS群体）。拍摄切齿列的数字X光片，并评估与EOTRH相关的变化，从而对每匹马进行总体分类。
研究群体的平均年龄为21岁，范围在10至37岁之间。总体而言，所有马匹中有94%至少有轻微变化，62%有与EOTRH相关的切齿中度至重度放射学变化。没有一匹14岁以上的马没有EOTRH的放射学迹象，所有28岁以上的马切齿至少有中度放射学变化。
临床病例组可能对患有诸如EOTRH等现有牙科问题的马匹存在偏差，因为它们是专门为牙科护理而到诊所就诊的。
聚焦于放射学变化，本研究表明EOTRH在柏林-勃兰登堡的马匹中是一种常见病症。随着年龄增长，疾病更频繁，放射学变化也更严重。由于没有一匹14岁以上的马没有放射学发现，轻度变化可能与正常牙齿老化过程有关。
