复发性牙源性角化囊肿增长速率的临床评价

目的:评价和分析复发性牙源性角化囊肿的增长速率及其早期影像学特点。方法:选择剜除术后X线显示复发并随访6～36个月的3例下颌骨牙源性角化囊肿患者,在X线片上测量比较囊肿最大直径,计算其年均增长速率,并评估其早期影像学特征。结果:8个复发性囊肿增长速率为0.67～22.0mm/a,平均为4.79mm/a。术后短期内的复发病变生长较快,且病变一般无明显硬化缘。此外,早期发现的多个独立的小的复发病变可逐渐增长,融合成多房性囊肿。结论:复发性牙源性角化囊肿的增长速率与其复发时间密切相关,多个独立的小囊肿在迅速增大后可形成多房性病变。

Clinical evaluation on the growth rate of recurrent odontogenic keratocysts

PURPOSE: To evaluate the growth rate and early imaging features of recurrent odontogenic keratocysts.METHODS: Three cases with 8 recurrent odontogenic keratocysts were selected to evaluate the growth rate of the lesions via measurement of the greatest diameter of cysts on the radiograms taken in several follow-up periods.In addition,the early imaging features of recurrent cysts were also analyzed.RESULTS: The growth rate of 8 recurrent cysts was 0.7 mm to 22.0 mm/year with average of 4.90 mm per year.Moreover,the growth rate of recurrent cysts in early postoperative period was much faster than those in late period,and no sclerotic margin was observed around the radiolucency areas.In addition,small separated recurrences might fuse with each other and generate multilocular cyst when they were enlarged.CONCLUSIONS:The growth rate of recurrent cysts is intensely associated with their recurrent periods,and the early separated recurrences might fuse with each other and generate multilocular cyst when they were enlarged.