种植修复单个上颌中切牙龈乳头高度的评估性研究

目的:前瞻性的研究种植修复单个上颌中切牙近中龈乳头高度与手术前邻间接触区最低点到牙槽嵴顶的距离间的关系.方法:选择56例上颌中切牙单个种植修复患者,在上颌中切牙部住的数码根尖片,利用Planmeca Dimaxis Ver-sion3.3.2软件分别测量手术前、手术后、修复前、修复后以及修复半年后中近中邻间接触区最低点与牙槽嵴顶问的距离,分析在整个种植修复的过程中影响邻间接触区最低点与牙槽嵴顶间的距离的因素,以统计软件SPSS12.0对各时期邻间接触区最低点到牙槽嵴顸问距离与龈乳头高度之间进行相关性分析.结果:56名单个上颌缺失行种植修复的患者中:当邻间接触区最低点到牙槽嵴顸间距离在3～5mm之间时,龈乳头在种植修复后有45.5%的龈乳头可恢复到良好,修复半年后的复查期龈乳头恢复良好的概率可达到95.5%;当该距离在5～6mm时,修复后及修复半年后龈乳头恢复良好的概率分别下降至30%和75%;但当该距离升至7mm以上时,几乎不可能恢复美观的龈乳头.邻间接触区最低点到牙槽嵴项间距离的变化主要在手术后到修复前这段期闻,变化范围在[-0.13mm,0.46mm]之间.手术前邻间接触区最低点到牙槽嵴项间距离与种植修复半年后龈乳头指数值之间呈负相关,两者之间的相关系数r=-0.715(P<0.01).结论:手术前上颌中切牙邻面接触区最低点与邻近天然牙侧牙槽嵴顶间的距离可作为预测上颌中切牙种植修复后龈乳头高度恢复的重要参考指标之一.

Objective:This prospective study was performed to observe the correlation between the mesial papilla's height of single implant-supported Maxillary central incisor and the distance from the base of the contact point to the alveolar crest Material and Methods: 56 patients involved in single implant。upported maxillary central incisor were included in the study. The distance from the base of the contact point to the alveolar crest in the digital periapical film of Maxillary central incisor were measured using the software Planmeca Dimaxis Vereion3. 3. 2. The time of measurements were as follows: 1)the psurgical and postsurgical periods , 2 ) be- fore and after the crown installation 3 )the follow-up examination of more than 0. 5 year. To analyze the factors that influence the dis-lance , and the correlation between the distance and the height of gingival papilla during the whole restored period . Correlation analysis between the distance and the height of gingival papilla during the whole restoration was done by the statistical software Spss12. 0. Re-salts: The results demonstrated that the ratio of esthetic papilla can achieve 45.5% at the crown installation and 95.5% at the follow -up examination when the distance。between 3mm and 5mm. When the distance was between Smm and 6mm, they dropped to 30% and 75%，respectively. However, when the distance increased to above 7mm, the papilla can hardly be in a esthetic outcome. There was a significant change of the distance was found during the periods from the postsurgery to prestoration, and the scope of the changes was between-0. 13mm and 0. 46 mm. A negative correlation was found between the distance and the index of papilla. The correlation coefficient r was-0.715 (P<0.01).Conclusions ; It is proposed that the pre:urgery distance of maxillary central inci-sor from the base of the contact point to the alveolar creel can be used as one ofthe important reference indexes to assess and predict the heit conditions of ngival papilla.