Repair of bone defect caused by bone tumor with OsteoSet:Osteoset absorption and new bone growth characters

Debao ZHANG; Qian CHENG; Guishan GU

ABSTRACT

BACKGROUND:

In recent years,bone defect caused by tumor,trauma,infection and so on is always the troublesome problem in the orthopaedics field. Many kinds of bone graft substitute have been exploited to conquer this problem.OsteoSet,a new substitute for bone graft,with the advantage of excellent biocompatibility,degradation,bone conduction and induction of ossification,is an ideal product.

OBJECTIVE:

To investigate the effect of OsteoSet in repairing bone defects due to tumor.

DESIGN:

Retrospective study and case analysis.

SETTING:

Department of Orthopaedics,First Hospital of Jilin University.

PARTICIPANTS:

Twenty-two patients with bone defect caused by bone tumor who received operation in the Department of Orthopaedics,First Hospital, Jilin University between June 2004 and September 2006.The involved patients,14 male and 8 female,averaged 23 years old ranging from 5 to 68 years.Inclusive criteria① Diagnosed as benign tumor in bone according to the bone tumor classification criteria instituted in China in 1983.②Had the indications of tumorectomy and bone grafting with OsteoSet substitute.③Informed consent was obtained.The position of tumor was described as 6 in shaft of humerus,2 in neck of femur, 9 in inferior segment of femor, 4 in superior segment of tibia and 1 in celcaneus respectively.

METHODS:

①Operation procedureAfter the effective anesthesia,the tumor was exposed as usual.Then the tumor was resected as thoroughly as we could.When OsteoSet substitute in the bone defect was filled carefully in order to avoid crushing into pieces.At last the substitute should be covered with periosteum or soft tissue.②Postoperative evaluation The area of substitute absorption was observed by X-ray examination in 4, 8, 12 and 24 weeks after oporation.Postoperatively.incision healing,pain and complications of paients were observed at 6,7,8 and 9 months.MAIN OUTCOME

MEASURES:

OsteoSet substitute absorption rate and new bone formation rate as well as postoperative follow-up results.

RESULTS:

Twenty-two patients were involved in the final analysis.①OsteoSet substitute absorption rate and new bone formation rateThe evident absorption of OsteoSet substitute could be found in the X-ray film 4 weeks after operation.At the same time,the slender bone trabecula formed and bone density ncreased.At the end of 12 weeks after operation,about 97.1 percent OsteoSet substitute was absorbed and approximate 95.3 percent new bone infiltrated the defect area. In the 6 months, the substitute absorption rate and the new bone formation rate were 99.1 percent and 98.6 percent respectively. Stable bone trabecula formed in the bone defect area and the new bone connected with the surrounding health bone naturally by remolding.②Follow-up

results:

All the operative incisions healed well and there were no pain and discomfort in the duration of hospital stay; All the patients had no fever, erythra or other allergic responses during the follow up;The OsteoSet substitute were absorbed well and new bone also formed well in all the cases;All the patients were satisfied with the recovery of limb function.

CONCLUSION:

The substitute absorption was accordance with the new bone formation.For its good absorption and new bone reconstruction,OsteoSet is an ideal substitute for bone defect caused by tumor.