生体内吸収性膜を用いた組織誘導再生法のブレード・インプラントへの応用
スポンサーリンク
概要
- 論文の詳細を見る
The purpose of this study was to investigate the bone augmentation around blade implants inserted with concurrent application of guided tissue regeneration (GTR) treatment using biodegradable membrane. Three months prior to implant insertion all mandibular premolar teeth were extracted in 10 mongrel dogs. Subsequently a modified 2-piece titanium implant was inserted into precise recipient site on each side. Left sides of dogs' mandible were covered with polylactic acid membranes (PL-membrane) and right sides remained uncovered. These membranes were secured by the healing screws and washers to the implants. Specimen blocks were removed 8 and 16 weeks postoperatively for hitological evaluation of their effects on the bone augmentation around the implants. Micro-histopathological observations were made under three conditions : normal light, fluorecent light and microradiography. The results suggest as follows ; 1. In the experimental groups, however, the mineralization of the bone was delayed as compared with the control groups, sufficient bone was obtained both vertically and horizontally. 2. In the control goups, the height of bone was lower than that of preoperation. Furthermore the shape of repaired bone above the implant shoulder was observed as an excavation. 3. At 16 weeks most PL-membrane was observed as disintegrated gradually. 4. There were some cases where soft tissue dehiscence was observed in the experimental groups. It may have been badly influenced by the shape of the osseous defects and the character of PL-membrane. This study suggests that the application of GTR treatment to blade implant insertion may be more practicable for patients with compromised bone support at the implanted site. Furthermore, biodegradable membrane can be expected for clinical induction due to the benefit of eliminating the need of a reoperating procedure because it will be resorpted later in a defined period.
- 九州歯科学会の論文
- 1993-02-25