摘要
目的:探讨成品牙弓夹板、方丝片段弓技术、光敏树脂贴合夹板及超强纤维增强复合树脂夹板4种固定外伤脱位牙技术对基牙、脱位牙早接触的影响。方法:选择外伤性脱位牙病人46例,88个脱位牙(不完全脱位牙≤2个,无冠根折或牙槽骨骨折),276个基牙(基牙无松动、缺失或萌出不全)。随机分成4组,分别采用成品牙弓夹板、方丝片段弓、光敏树脂贴合夹板、超强纤维增强复合树脂夹板4种技术进行单颌固定(固定6周)。48 h后观察早接触状况。结果:外伤脱位牙固定术后48 h,在脱位牙、基牙出现早接触方面,成品牙弓夹板组与方丝片段弓组相比无显著性差异(P﹥0.05);超强纤维增强复合树脂夹板组与光敏树脂贴合夹板组无显著性差异(P﹥0.05);光敏树脂贴合夹板组与成品牙弓夹板组、方丝片段弓组相比有显著性差异(P<0.05);超强纤维增强复合树脂夹板组与成品牙弓夹板组、方丝片段弓组相比有显著性差异(P<0.05)。结论:外伤脱位牙采用方丝片段弓和成品牙弓夹板技术固定后,金属固定材料产生的形变是造成基牙、脱位牙早接触的主要原因;超强纤维增强复合树脂夹板技术和光敏树脂贴合夹板技术固定材料形变小,出现基牙、脱位牙早接触的几率相对较小。
AIM： To compare the effects of four different fixing methods on the premature contact of trau- matically dislocated teeth and abutment teeth. METHODS： Eighty-eight traumatically dislocated teeth（ incomplete dislocated teeth ≤2, with no crown, root or alveolar bone fracture） and 276 abutment teeth （no loosening, no missing or incomplete eruption）in 46 patients were chosen. The teeth were randomly divided into four groups and were treated with dental splint, segmented arch, composite resin splint and Super fiber-composite resin splint, respectively. Fixation lasted for 6 weeks. Premature contact was recorded 48h after fixation. RESULTS： No significant difference was observed in premature contact between dental splint group and segmented arch group and between composite resin splint group and Super flber-composite resin splint group （ P 〉 0.05）. However, composite resin splint group and Super fiber -composite resin splint group showed significantly lower premature contact than dental splint group and segmented arch group （P 〈 0.05）. CONCLUSION ： Fixing material deformation might be the main reason of premature contact in dental splint group and segmented arch group. The degree of deformation of resin material is less than metal, therefore less premature contact was observed in composite resin splint and Super fiber-composite resin splint groups than in dental splint group and segmented arch group.
出处
《牙体牙髓牙周病学杂志》
CAS
北大核心
2011年第7期408-411,共4页
Chinese Journal of Conservative Dentistry
基金
西安市卫生局科研项目(2009-D6)
关键词
固定方式
脱位牙
基牙
早接触
fixed form
dislocated teeth
abutment teeth
premature contact
