摘要
目的 研究每 1～ 2个月和 5～ 6个月更换一次氢氧化钙对诱导死髓年轻恒牙根尖屏障形成的影响。方法 对 2 9名患者 4 1颗牙髓坏死的年轻恒双尖牙用氢氧化钙作根尖诱导成形术 ,将患牙随机分为A、B两组 ,分别每 1～ 2个月 (A组 )和 5～ 6个月 (B组 )更换一次氢氧化钙 ,每 3个月拍X线片复查。根据临床检查和X线片 ,分析两组间根尖屏障形成的速度和位置的差异。结果 4 1颗牙都在 2 1～ 6 5周后形成了根尖屏障 ,所需时间平均为 4 0 .17± 11.89(周 ) ,其中A组为 31.0 5± 5 .13(周 ) ,B组为 4 9.75± 9.0 3(周 ) ,两组间有显著性差异 (P<0 .0 0 1) ;A组有 80 .95 %的钙化屏障位于根尖 ,B组为 5 5 % ,两组间无统计学差异 (P >0 .0 5 )。结论 氢氧化钙诱导年轻恒牙根尖屏障形成效果良好 ,应重视更换氢氧化钙的时间 ,间隔不宜过长 。
Purpose: To compare the effect of a 1-2 monthly refilling of the root canals with calcium hydroxide paste with a 5-6 monthly replacement of the paste on speed and location of barrier formation in non-vital immature premolars. Methods: 41 non-vital immature premolars undergoing calcium hydroxide apexification were reviewed. All teeth were randomly assigned into two groups (A and B). The calcium hydroxide paste in the canal was replaced 1-2 monthly (group A) or 5-6 monthly (group B). Periapical radiographs were taken every 3 months. Speed and location of barrier formation of the teeth were evaluated by clinical and radiographic methods. Results: All the 41 teeth formed an apical hard tissue barrier in 21-65 weeks, with an overall mean time of (40.17 ± 11.89) weeks, and group A was (31.05 ± 5.13) weeks, grou B was (49.75 ± 9.03) weeks, the difference was statistically significant (P 0.05). Conclnsions: This study confirms the efficacy of calcium hydroxide in inducing apical barrier formation of immature permanent teeth. Barrier formed significantly faster in teeth with more frequent change of calcium hydroxide.
出处
《复旦学报（医学版）》
EI
CAS
CSCD
北大核心
2004年第4期399-400,405,共3页
Fudan University Journal of Medical Sciences
关键词
氢氧化钙
年轻恒牙
根尖诱导成形术
根尖屏障形成
Dental materials
Growth kinetics
Hydrated lime
Radiography
Statistical methods
Tissue
