CAJ | 학술논문

目的评价成年固定正畸患者在治疗后下颌中切牙之间出现黑三角的病因及它们之间的联系,为临床预防出现黑三角提供理论依据.方法实验组为100例在正畸治疗后出现黑三角的成年患者,对照组为79例在正畸治疗后未出现黑三角的成年患者,均采用直丝弓矫正技术.治疗前、后两组都分别拍摄曲面断层片进行测量分析,采用spss11.5软件包进行统计学分析.结果治疗前下颌中切牙的旋转和重叠交错与黑三角的发生没有统计学的意义.两个下颌中切牙近中釉牙骨质界点的距离、釉牙骨质界到邻接点的距离、牙槽嵴顶到釉牙骨质界的距离、下颌中切牙邻接点到牙齿长轴的距离等与黑三角的发生有关(P<0.05),有统计学意义.女性发生黑三角比例较高(P<0.05),有统计学意义.牙周情况方面,有牙结石的患者发生黑三角的比例高(P<0.05),有统计学意义.结论成年正畸患者发生黑三角的概率与矫治前的牙齿牙周的某些因素和矫治过程中变化程度有显著的相关性.黑三角是一个多因素发病的疾病.
목적 평개성년고정정기환자재치료후하합중절아지간출현흑삼각적병인급타문지간적련계,위림상예방출현흑삼각제공이론의거.방법 실험조위100례재정기치료후출현흑삼각적성년환자,대조조위79례재정기치료후미출현흑삼각적성년환자,균채용직사궁교정기술.치료전、후량조도분별박섭곡면단층편진행측량분석,채용spss11.5연건포진행통계학분석.결과 치료전하합중절아적선전화중첩교착여흑삼각적발생몰유통계학적의의.량개하합중절아근중유아골질계점적거리、유아골질계도린접점적거리、아조척정도유아골질계적거리、하합중절아린접점도아치장축적거리등여흑삼각적발생유관(P<0.05),유통계학의의.녀성발생흑삼각비례교고(P<0.05),유통계학의의.아주정황방면,유아결석적환자발생흑삼각적비례고(P<0.05),유통계학의의.결론 성년정기환자발생흑삼각적개솔여교치전적아치아주적모사인소화교치과정중변화정도유현저적상관성.흑삼각시일개다인소발병적질병.
Objective To evaluate the etiology of posttreatmeat open gingival embrasures in adult orthodontic patients,examine the associations and a theoretical basis for clinical prevention of open gingival embrasures. Methods A subsample of 179 patients were i-dentified for measurement and divided into 2 groups:79 patients were normal gingival embrasures and 100 patients were open gingival embrasures(56 males,123 females;18 ～ 38 years of age). Digital images of the pretreatment mandibuUary models and posttreatment panoramic radiographs were made to measure the pretreatment and posttreatment variables. The data were analyzed using SPSS 11.5 software package. Results Pretreatment mandibullary central incisor rotation and overlap were not statistically associated with postt-reatmeat open gingival embrasures. A posttreatment CEJ-CEJ distance of the two mandibullary central incisors and the posttreatment alveolar erest-CEJ distance were significant(P < 0. 05). A posttreatment CEJ-interproximal contact distance was a contributing factor in open gingival embrasures (P < 0. 05). A posttreatment long axis-interproximal contact distance was associated with open gingival embra-sures formation(P < 0. 05). The incidence of open gingival embrasures of females was higher than that of males (P < 0. 05). The pa-tients with dental calculus were more susceptible to open gingival embrasures (P < 0. 05). Conclusions The investigation indicates that pretreatment local factors of dental and periodontal and posttreatment degrees of change of variables are significant factors in open gingival embrasures in adult patients. Open gingival embrasure is a multi-factor in the pathogenesis of the disease.