Müller H P, Stahl M, Eger T
Department of Operative Dentistry and Periodontology, University of Heidelberg, Germany.
J Periodontol. 1999 Jul;70(7):743-51. doi: 10.1902/jop.1999.70.7.743.
Different treatment modalities have been described for root coverage in cases of gingival recession. The aim of the present study was to evaluate the postsurgical outcome of 2 modes of surgical root coverage of predominantly shallow, Class I or II, gingival recessions.
Fourteen buccal recession sites in 13 patients were treated with free connective tissue grafts employing a modified envelope technique; 14 sites in 9 patients were subjected to a coronally repositioned flap in combination with a bioabsorbable membrane. Immediately before surgery as well as after 6 months, gingival dimensions, i.e., width and thickness, as well as root coverage and attachment gain, were assessed to the next 0.1 mm employing a caliper, an ultrasonic device, and a pressure calibrated, computerized periodontal probe.
At the outset, mean recession depths amounted to 2.48+/-1.06 and 3.00+/-1.95 mm for patients treated with a free connective tissue graft and a bioabsorbable membrane, respectively. With the former technique, 80+/-24% root surface could be covered after 6 months, while the latter resulted in only 45+/-40% coverage. The contrast in reduction of recession width was even more pronounced (77+/-35% versus 18+/-37%). In both groups, an increase of gingival thickness of 0.6 to 0.7 mm was noticed.
Small recessions may be covered more predictably with the modified envelope technique. 751.
对于牙龈退缩病例的牙根覆盖，已有多种不同的治疗方式被描述。本研究的目的是评估两种主要用于治疗浅I类或II类牙龈退缩的手术牙根覆盖方式的术后效果。
13例患者的14个颊侧退缩位点采用改良信封技术行游离结缔组织移植治疗；9例患者的14个位点采用冠向复位瓣联合生物可吸收膜治疗。在手术前及术后6个月，使用卡尺、超声设备和压力校准的计算机化牙周探针，以0.1mm的精度评估牙龈尺寸，即宽度和厚度，以及牙根覆盖和附着获得情况。
最初，接受游离结缔组织移植和生物可吸收膜治疗的患者平均退缩深度分别为2.48±1.06mm和3.00±1.95mm。采用前一种技术，6个月后80±24%的牙根表面可被覆盖，而后一种技术仅导致45±40%的覆盖。退缩宽度减少的对比更为明显（77±35%对18±37%）。两组均观察到牙龈厚度增加0.6至0.7mm。
改良信封技术覆盖小范围退缩可能更具可预测性。751。
