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对ＤＬ－聚乳酸（ＰＤＬＬＡ）夹板在８只狗的下颌骨、颧弓骨折内固定的疗效，进行了实验研究。采用大体、组织学、四环素荧光活体骨标记、Ｘ线摄片，观察骨折４，８，１２，２８周时的内固定效果；ＰＤＬＬＡ板的组织相容性及其在体内的降解，并与微型钢折内固定比较。结果表明：１．超高分子ＰＤＬＬＡ板具有良好的力学性能，在下颌体、颧弓骨折内固定中可获得良好固位，达到与微型钢板相同的内固定效果。２．ＰＤＬＬＡ板具有良好的组织相容性，不引起周围组织的炎症和异物反应。３．ＰＤＬＬＡ板植入后脆性逐渐增加，术后３月仍呈原有外形，但重量下降，术后７月已降解为碎片和小颗粒，重量丧失７０％以上，但何时完全吸收有待更远期观察。
The experimental study on the effect of DL-polylactide (PDLLA) splint in mandibular and zygomatic arch fractures of 8 dogs was performed. The gross, histological, tetracycline fluorescent live bone markers and X-ray were used to observe the internal fixation effect of fracture at 4,8,12,28 weeks. The histocompatibility of PDLLA and its degradation in vivo were compared with that of miniature Steel folding internal fixation comparison. The result shows: 1. Ultra-high polymer PDLLA plate has good mechanical properties, in the mandibular body, zygomatic arch fracture fixation can get a good retention, to achieve the same internal fixation with micro-plate. 2. PDLLA plate has good histocompatibility, does not cause inflammation of the surrounding tissue and foreign body reaction. 3. After the implantation of PDLLA plate, the embrittlement increased gradually. However, the shape of the PDLLA plate remained unchanged after 3 months. However, the weight of the PDLLA plate decreased after 3 months. However, the PDLLA plate degraded into small pieces and small particles in July and lost more than 70% of the weight. However, Observed.