Parma-Benfenati S, Tinti C
Department of Periodontology, Dental School, University of Ferrara, Italy.
J Periodontol. 1998 Jul;69(7):834-9. doi: 10.1902/jop.1998.69.7.834.
Guided tissue regeneration was USED to treat a localized, deep, buccal recession on a mandibular left central incisor. This tooth was labially displaced and scheduled for extraction for orthodontic reasons. The mucogingival defect had 7 mm of facial gingival recession, and 4 mm mid-buccal probing depths. The attachment loss was 11 mm. There was no attached gingiva. At surgery the root was notched as landmarks for assessing the histological examination. A titanium reinforced barrier membrane was left in place for 4 weeks. At the time of extraction, 9 months post-initial treatment, there was a gain of 3 mm of root coverage and 1 mm of gingiva. The tooth and facial tissues were removed by block section for histologic evaluation. The root surface exhibited a total amount of a histologic new connective tissue attachment of 5.6 mm and regeneration of a new bone growth of 6.7 mm of bone. The histologic findings demonstrated that the coronal extent of the new attachment and new facial bone, 9 months after guided tissue regeneration treatment, were located coronal to the preoperative location, in a root surface previously exposed by a deep, long-standing recession.
引导组织再生技术被用于治疗下颌左侧中切牙局限性、深部的颊侧牙龈退缩。该牙唇向移位，因正畸原因计划拔除。膜龈缺损处有7毫米的颊侧牙龈退缩，颊侧中部探诊深度为4毫米。附着丧失为11毫米。无附着龈。手术时在牙根上刻痕作为评估组织学检查的标志。一块钛增强屏障膜留置4周。在初次治疗9个月后拔牙时，牙根覆盖增加了3毫米，牙龈增加了1毫米。通过整块切片切除牙齿和面部组织进行组织学评估。牙根表面显示组织学上新结缔组织附着的总量为5.6毫米，新骨生长再生为6.7毫米的骨组织。组织学结果表明，引导组织再生治疗9个月后，新附着和新颊侧骨组织的冠方范围位于术前位置的冠方，即在先前因深部、长期牙龈退缩而暴露的牙根表面。
