自体下颌角骨质游离移植隆颏术的实验和临床研究

目的:研究应用自体下颌角区骨质游离移植隆颏术的可行性。方法:分为两部分,第一部分动物实验:将小型猪的下颌角截除,并用截除的下颌角骨质移植到颏部,用钛钉固定,术后用三维CT进行效果评定。第二部分,临床应用,在46例应用双侧下颌角截骨术治疗方脸畸形的同时,应用下颌角骨质进行隆颏术,术后随访,观察治疗效果。结果:动物实验中游离移植的骨质完全被吸收。临床病人中73.9%的患者吸收率达到50%以上。结论:通过动物实验和临床应用观察,我们认为临床中应用下颌角截除的自体骨游离移植隆颏术需要谨慎实施。

Experimental and clinical analysis of chin augmentation with mandibular bone

Objective The aim was to study the feasibility of the chin augmentation with the bone from the mandible angle osteotomy.Methods Two parts were including in the article.The first part was animal experiment.The chinese miniatrue pigs were performed the operations of mandible angle osteotomy.The mandibular angle bone was transplanted freely on the pig’s mental fixed with titanium nail.After the procedure,the effects were assessed by three dimensional computerized tomography.The second part was the applications in clinique.46 patients were obtained the operations of the mandible angle osteotomy and chin augmentation with the bone from the mandibular bone.The patients were followed up and checked by X-ray.Results The bones grafted were absorbed totally in animal experiments.Over 50% resorption of the free bone grafts took place in 73.9% of the patients in clinic.Conclusions From the animal experiment and experience in clinic,we consider that the chin augmentation with free bone grafts from mandible angle osteotomy need to be performed prudently.