Erdem A P, Ozdas D O, Dincol E, Sepet E, Aren G
Department of Paediatric Dentistry, Istanbul University, Capa- Fatih, Istanbul, Turkey.
Eur Arch Paediatr Dent. 2009 Jun;10(2):110-3. doi: 10.1007/BF03321611.
Root fractures in permanent teeth are uncommon injuries and represent complex healing patterns. Fractures occur most often in the middle third of a root and rarely at the apical third.
Case 1: A 10- year old boy attended the Dept. Paediatric Dentistry Clinic (Istanbul University) after an accident at school 4 hrs earlier. Clinically there was a swollen upper lip, pain on the periapical region of the tooth and horizontal root fractures in the middle third of both roots of teeth 11 and 21 were noted on periapical radiography. Case 2: An 8-year old boy was involved in a bicycle accident 3 months prior to attending. A maxillary splint was present on incisor 11. Clinically an enamel-dentine crown fracture and radiographically a horizontal mid-third root fracture, were seen. Case 3: An 11-year old boy attended after a bicycle accident 1 month before, involving tooth 21. Clinically there was mobility, slight discolouration and radiographically a horizontal mid-third root.
In all cases only the coronal segment of roots were treated and MTA was placed as a fracture line plug.
FOLLOW-UP: At 36 months follow up all teeth were asymptomatic and clinical and radiographic investigation of the teeth revealed excellent healing patterns.
MTA can be considered as a good choice for a definitive root filling material in horizontal tooth root fractures with excellent biological and physical properties.
恒牙牙根折断是一种少见的损伤，愈合模式复杂。骨折最常发生在牙根的中1/3处，很少发生在根尖1/3处。
病例1：一名10岁男孩在4小时前学校发生事故后就诊于儿科牙科诊所（伊斯坦布尔大学）。临床检查发现上唇肿胀，患牙根尖区疼痛，根尖片显示11和21牙的两根中1/3处均有水平根折。病例2：一名8岁男孩在就诊前3个月发生自行车事故。11切牙处有上颌夹板。临床检查发现釉质-牙本质冠折，X线片显示牙根中1/3处水平骨折。病例3：一名11岁男孩在1个月前发生自行车事故后就诊，累及21牙。临床检查发现牙齿松动、轻度变色，X线片显示牙根中1/3处水平骨折。
所有病例均仅处理牙根的冠部断端，并使用MTA作为骨折线充填材料。
随访36个月时，所有牙齿均无症状，临床和影像学检查显示愈合情况良好。
MTA具有良好的生物学和物理性能，可被视为水平牙根折最终根充材料的良好选择。
