Reconstruction following internal hemipelvectomy for bone tumors remains a major surgical challenge. Most of the cases are considered not suitable for reconstruction because of high complication occurrence. Allografts coupled with standard prosthesis is a reliable method of reconstruction.

26 patients received a McMinn stemmed cup (Link, Germany) after periacetabular tumor resection from February 1999 to 2006. In 18 patients the reconstruction followed resection of the acetabular area while in other 8 an extrarticular resection of the proximal femur was performed. In 21 cases a stemmed acetabular cup were associated with massive bone allograft. There were 13 female and 13 male with a mean age of 41 years (13 to 70). Average follow-up was 45 months (7 to 105).

Six patients were affected by local recurrence of the tumour and five underwent hindquarter amputation. In 4 of them the index surgery followed a previous recurrence of the tumour. Finally 6 patients died for related causes within 2 years. All the other 20 have been followed clinically and radiographically for a minimum of 24 months.

Deep infection occurred in one case, there were no cases of dislocation. Radiolucency at the prosthesis-bone interface was observed in 3 cases, 2 patients had proximal migration < of 20 mm. Only one patient was treated for aseptic loosening because of incorrect initial position of the implant. The iliac osteotomy was consolidated in all cases, while a delayed union was frequently observed in the pubic osteotomy, however without compromise the stability of implant. Functional result were evaluated according to the MSTS system and this showed 65% of excellent or good clinical results.

The procedure requires appropriate patient selection, accurate preoperative planning, meticulous selection and preparation of allograft. Usually artificial ligaments are applied to reduce hip instability, however, this type of reconstruction do not require complex fixation, thus reducing surgical time and early complications.

Long-term clinical study to explore the curative effect and mechanism of the treatment of adult chronic osteomyelitis by implant Osteoset T.

The study object were 65 case adult chronic osteomyelitis patient from November 1977 to April 2003 in a University-based hospital. Age ranged from 18 to 69 years old. 40 cases were treated by general debridement (Method I); 25 cases were treated by general debridement and implant Osteoset T in dead space (Methods II). Stage IA(The UTMB Staging System) osteomyelitis 39 cases; The Organism was Staphylococcus Aureus 28 cases. In all cases (group A), 40 cases were treated with Method I (group AI), 25 cases were treated with Method II (group AII). The majority of the patients, 39 resulted as Stage IA (group B); 22 were treated with Method I (group BI) and 17 cases were treated with Method II (groupBII). Finally, 28 patients were chronic Staph Aureus osteomyelitis (Group C); 13 were treated with Method I (group CI) and 15 cases with Method II (group CII); Followed from 36 to 334 months, mean 75.0 months. Then respectively evaluate and analysis analyze the success rate of different method with standard.

The success rate of group BI was 59.09%, group BII was 94.12%, contrast the success rate there was significant difference (p< 0.05). The success rate of group AI was 60.00%, group AII was 80.00%. The success rate of group CI was 46.15%, group CII was 80.00%.

The use of Osteoset T has demostrated better healing rate than left the empty cavity there after debridement and irrigation. Osteoset T can local delivery antibiotic, filler of the dead space, It can be mixed with different antibiotics, reduces the hospitalization time, reduces the number of operation. Unfortunately, Osteoset dos not help with the bone growth.

Introduction: Allograft-Prosthesis Composite represents a reliable option for proximal femur replacement after resection for bone tumor. It provides advantages over megaprostheses because of better soft tissue repair and superior abduction strength, quality of gait, hip stability, and load transfer by healed bone rather than prosthetic stem, with potential impact on implant survival. Purpose of this paper was to review details of the surgical technique and results.

Methods: A retrospective study of 62 patients who had resection of the proximal femur because of a bone tumor and reconstruction with an Allograft-Prosthesis Composite was undertaken. The basic surgical technique consisted of an uncemented tapered long stem prosthesis (i.e. Wagner or Wagner-type stem) cemented in the allograft and press-fitted in the host bone, achieving bone-bone contact through a transverse osteotomy. Details of the surgical technique included: 1) accurate preoperative planning, canal sizing and implant selection; 2) under-reaming of the proximal 5–10 mm of the host medullary canal, depending upon bone quality and diameter of the selected stem; 3) allograft preparation and prosthesis cementation in the allograft; 4) introduction of the composite implant, pressfitted in host medullary canal, until bone-bone contact is achieved; 5) careful repair of abductors and iliopsoas to corresponding allograft tendon insertions.

Key points for successful fixation are absolute rotational stability and satisfactory circumferential bone-bone contact at the time of surgery.

Postoperative regimen consisted of hip, followed by progressive bracing and toe-touch weight-bearing for 6 weeks, weight-bearing.

Results: There were 2 septic failures. Two patients developed asymptomatic nonunion. There were no dislocations. Most common complication was fracture of the allograft greater trochanter (30%), which required surgery in only 1 case and never substantially affected function. The incidence of trochanteric fracture decreased from 63% in the first 27 patients to 5% in the following 35 patients by switching implant design from a valgus 145° neck angle to 135° neck angle, improving offset and abductors function. Bone grafting of the allograft-host union was required in 10% of the cases.

According to MSTS, results were satisfactory in 90% of the patients, with average score 91% (75%–96%).

Discussion and Conclusion: Allograft-Prosthesis Composite is a successful procedure for reconstruction of the proximal femur. Careful surgical technique is the key to excellent function and low complication rate.

Aims: Purpose of this study was to obtain long term follow-up in patients with Osteofibrous Dysplasia (OFD), in order to investigate natural history of the disease, late results of treatment, and potential risk of Adaman-tinoma development in this setting. Methods: A retrospective study of 48 patients with histologically proven OFD observed at our Institution between 1900 and 1997 was undertaken. Clinico-pathologic features of all cases were reviewed and found consistent with OFD. A clinical status update and current radiographs were obtained in all patients. A subgroup of 21 patients with minimum follow-up of 20 years (21 to 44 years, average 27) was analysed for functional result and adamantinoma development. Functional result according to MTS-ISOLS score correlated with surgical aggressiveness. Results: Best results were observed in patients that received a single biopsy or curettage; worse results were seen after multiple resections or osteotomies and associated with complications as infection or compartment syndrome. No patients had current symptoms or significant symptoms changes nor physical findings, radiographic clues or subsequent radiographic changes suggesting adamantinoma development. Conclusions: OFD is a benign condition; the natural history of the disease has minimal consequences in the adult life. Surgical treatment is usually not necessary and may actually worsen the result because of the potential for severe complications.

The relationship with adamantinoma remains unclear, follow-up is suggested.