Kenney E B, Lekovic V, Elbaz J J, Kovacvic K, Carranza F A, Takei H H
Clinical Periodontology Research Center, School of Dentistry, University of California, Los Angeles 90024.
J Periodontol. 1988 Feb;59(2):67-72. doi: 10.1902/jop.1988.59.2.67.
Twenty-three human subjects with two Class II furcation involvements in lower molars were treated with initial therapy following which presurgical measurements of pocket depth, gingival recession and attachment level were made. Periodontal flaps were used to expose the furcation defects, and one defect was implanted with porous hydroxylapatite while the other served as an unimplanted control. At the time of surgery, bone defects were measured obliquely and horizontally using a specially designed device to ensure reproducible probe angulation. Six months later the presurgical measurements were repeated, and reentry surgical procedures were carried out to measure the changes in the bone defects. Areas implanted with porous hydroxylapatite showed a statistically significant reduction in pocket depth and a statistically significant improvement in attachment level and fill of bone defects when compared with control defects. There was statistically less gingival recession in the implanted areas compared with the control sites. Control sites at six months showed no significant change in pocket depth, an increased loss of attachment and worsening of the bone defects.
23名患有下颌磨牙Ⅱ度根分叉病变的受试者接受了初始治疗，随后进行了术前牙周袋深度、牙龈退缩和附着水平的测量。使用牙周瓣暴露根分叉缺损，其中一个缺损植入多孔羟基磷灰石，另一个作为未植入的对照。手术时，使用专门设计的装置斜向和横向测量骨缺损，以确保探针角度可重复。六个月后，重复术前测量，并进行再次手术以测量骨缺损的变化。与对照缺损相比，植入多孔羟基磷灰石的区域在牙周袋深度上有统计学意义的降低，在附着水平和骨缺损填充方面有统计学意义的改善。与对照部位相比，植入区域的牙龈退缩在统计学上较少。六个月时，对照部位的牙周袋深度无显著变化，附着丧失增加，骨缺损恶化。
