不可逆牙髓炎根尖牙髓血管和结缔组织的超微结构改变,为根尖牙髓样品在电镜检查下,主观评价血管结构、结缔组织基质、矿化、细菌侵害和炎性浸润的中至重度改变。结果表明,不可逆牙髓炎根尖牙髓的血管和结缔组织的中至重度改变存在个体差异,不能根据临床试验,X线片来预示这些牙髓确切的组织学状态。不可逆牙髓炎是牙髓疾病的临床分类,需作根管治疗。临床诊断,根据体征和症状,常不作相关的组织学检查。 Seltzer等发现,对特殊温度刺激引起的疼痛反应,不是牙髓炎特殊类型的病征。这种牙髓对温度试验反 Irreducible pulpitis Periapical pulp vascular and connective tissue ultrastructural changes in the apical pulp samples under electron microscopy, subjective evaluation of vascular structure, connective tissue matrix, mineralization, bacterial invasion and infiltration of the middle to Severe changes. The results showed that irreversible pulpitis apical pulp and connective tissue of the blood vessels and moderate to severe there are individual differences, not based on clinical trials, X-ray film to predict the exact histological state of these pulp. Irreversible pulpitis is a clinical classification of pulp disease, requiring root canal therapy. Clinical diagnosis, according to signs and symptoms, often without making relevant histological examination. Seltzer et al. Found that the pain response to a particular temperature stimulus is not a specific type of symptom of pulpitis. This pulp on the temperature test