OBJECTIVE: To evaluate the clinical effect of drilling procedure following the hydroxyapatite orbital implantation. METHODS: From February 1996 to April 2000, 146 consecutive patients who received hydroxyapatite orbital implant were drilled and inserted a motility peg 6 to 16 months after hydroxyapatite implantation. Among them, there were 97 males and 49 females, aged from 18 to 60 years old, of the 146 motility pegs, 36 were sleeved pegs and 110 were nonsleeved. Goldman visual field analyzer was applied to measure the degree of artificial eye’s movement before and after drilling. RESULTS: Followed up for 1 to 40 months, no secondary infection occurred. The mobility of the prosthesis increased from (18.7 +/- 3.8) degrees preoperatively to (42.3 +/- 3.7) degrees postoperatively. CONCLUSION: The delayed drilling procedure and motility peg insertion improve the range of movement and the sensitivity of the artificial eye with a low rate of complications.
The primary results of five patients in whomthe block hydroxyapatite artificial bone (BHAB)used in maxillofacial plastic repair were reported. All incisions healed up with no evidence ofinfection. None of the implants was rejected norhad resorption changes. Satisfactory estheticaleffects were maintained. The results demonst-rated BHAB had a good biocampatibility andcould be used as a bone graft substitute inmaxillofacial plastic repair. This kind of material could be carved and contoured ...
Objective To review progress of clinical application ofmorselized bone and to investigate relative exploration on it.Methods The recent articles on morselized bone in the field of clinicand experimental research were extensively reviewed, and relative examination of morselized bone referring to method and mechanism were investigated carefully.Results Morselized bone worked well clinically, especially inrevision ofartificial total hip joint, and it was proved effective with lots of advantages.Conclusion Morselized bone functions well clinically. Although its mechanism requires a further research, it still has a promising value in clinical application.
Objective To evaluate the clinical results of cementless total hip replacement (THR) in treating osteoarthritis and identifying the factors affecting the results. Methods From January 1995 to December 1999, 76 patients(85 hips) with osteoarthritis of hip joint were treated. These patients were assessed according to Harris hip score and X-ray film. The average follow-up time was 49.3 months. Results The average Harris score in the patients was 90.9 points. The excellent or good rate was 91.9%(75/85). Pain in the thigh existed in 23 hips (27.5%). The femoral osteolysis occurred in 14 hips(16.5%). The radiographical result demonstrated femoral loosening in 2 hips. harris score became lower when the femoral component of osteoarthritis of hip jointl. Pain in the thigh may be related to the varus placement of femoral component and femoral osteolysis. Femorla osteolysis is one of important factors affectin the long-term outcomes.
OBJECTIVE To search an ideal carrier of transferred keratinocytes for transplantation. METHODS The transferred keratinocytes were seeded on the surfaces of the artificial dermis and the silicone membrane and cultured in vitro for 2 weeks. The growth of the keratinocytes was observed by microscope and scanning electron microscope. RESULTS The keratinocytes implanted on the artificial dermis began to rupture and died after 2 to 3 days. While the keratinocytes adhered well on the surface of silicone membrane with pseudopodia formation after 1 week under scanning electron microscope, and the cells kept normal morphological and proliferative properties 2 weeks later. CONCLUSION The silicone membrane can be applied as an useful carrier for the keratinocytes transplantation.
Artificial intelligence (AI) technologies, encompassing virtual reality, augmented reality and adaptive learning platforms, offer immersive and personalised opportunities for undergraduate orthopaedic education. However, their adoption is hindered by limited faculty acceptance, data privacy and ethical risks, and disparities in educational resources. This study examines the opportunities and challenges of AI integration in orthopaedic teaching and proposes strategies including systematic AI training, strengthened data protection, resource sharing, and blended learning models. These measures aim to enhance the quality of learning for students and educators while fostering innovation and progress in medical education.
In order to restore the function of shoulder joint in patient with tumor of upper end of humerus, artificial humeral head replacement was performed. The materials included resinene, nylon-6 and large molecular polyethylene from 1978 to 1993, 14 patients were treated. The tumors involved in this group were giant cell tumor, synviosarcoma, bone cyst, osteochondroma, osteoblastoma, osteofibrosarcoma, osteosarcoma, chondrosarcoma, parosteosarcoma and malignant giant cell tumor. After resection of the tumor, the artificial prosthesis was implanted with bone cement. After 1 to 16 years follow-up, functions of the shoulder joint were reserved in 86% of the patients.
Objective To understand the value of pre-coating in artificial vessel endothelialization. Methods Literature concerning precoating in artificial vessel endothelialization was extensively reviewed. Results Pre-coating included chemical coatings(collagen, fibronectin, laminin, poly-l-lysin, gelatin andextracellular matrix), pre-clotting(plasma, blood, serum and fibrin glue), chemical bonding (heparin, RGD and lectins) and surface modification. Most of them could enhance the adhesion of the endothelial cells. Conclusion Pre-coating couldimprove endothelialization, but further research is needed to search for the appropriate concentration and incubation time.
With the development of computer technology, artificial intelligence (AI) has gradually been applied to various industries in society. In the healthcare industry, AI provides more choices for disease diagnosis and treatment, and also brings new vitality to the development of clinical medicine. In order to better promote the use of AI technology to improve the quality of otolaryngology teaching, this article provides a brief overview of the application of AI in otolaryngology, including the use of neural networks, deep learning for image analysis, disease diagnosis and treatment. It also discusses the significance and implementation methods of AI application in otolaryngology teaching from several aspects such as course design, teaching practice, and effectiveness assessment.
A mechanical study on the bones of 29 rabbits following implantation of carbontendon was carried out. The rabbits were divided into seven groups according to the observation time (2,4,6,8,12,20 and 30 weeks after operation). A bundle of artificial tendon composed of 7,000 carbon fibers was passedthrough a tunnel in the tibia, and both ends of the artificial tendon were ligated to the muscle fibers. The mechanical strength and histological structure of the carbonbone junction and their relationship were studied in each group. Carbon fiberwas split and degradated in six to eight weeks after operation. The tensile strength of carbontendon in the soft tissue was decreased from 82±4.6N in the second week to 27±5.31N and6.3±1.81N in the sixth and eighth week respectively. The tensile strength of carbontendon increased from 3.01±1.2N to 6.1±2.01N at the carbon -tendon-bone junction in the bone. The tensile strength of carbon-tendon was unsatisfactory for implantation into bone. The carbon-tendon was split and degradated and the tensile strength was not b enough to cope with the early functional exercises.