Absorbable Screws to Treat Anterior-Superior Iliac Spine Avulsion Fractures

Study Overview
=================
Brief Summary
-----------------
There is some debate over the best treatment for anterior-superior iliac spine (ASIS) avulsion fractures although conservative treatment can be applied when there are no neurological symptoms. Open reduction and internal fixation can be performed for dislocations exceeding 1.5 cm, or in patients requiring a short period of convalescence, although a second operation is subsequently required to extract osteosynthetic material. In this paper, we introduce the use of absorbable screws as a new fixation material for the second round of surgery.

Detailed Description
-----------------
To investigate the feasibility of absorbable screws as a new fixation material for the treatment of ASIS avulsion fractures in children and adolescents.The investigator plan to retrospectively analyzed 59 patients diagnosed with ASIS avulsion fractures in our hospital between Jan 2009 and Dec 2016. These patients were divided into two groups: group A (conservative group) and group B (absorbable screws). Group A received conservative therapy involving bed rest with the affected lower extremity positioned with the hip and knee in flexion to ensure minimal tension of the muscles attached to the ASIS avulsion fracture. Group B received open reduction and internal fixation with fixation by absorbable screws. Six weeks and three months after treatment, all patients were assessed for range of motion (ROM) and by X-ray as they returned to activity. One week after treatment, the American Academy of Orthopaedic Surgeons (AAOS) lower limb and hip score was used to evaluate hip function; the same scores were also determined during follow-up at 1, 3, 6 and 12 months postoperatively.

Official Title
-----------------
The Use of Absorbable Screws to Treat Children and Adolescents With Anterior-Superior Iliac Spine Avulsion Fractures

Conditions
-----------------
Fractures, Bone, Pediatrics

Intervention / Treatment
-----------------
* Procedure: open reduction and internal fixation with fixation by absorbable screws


Participation Criteria
=================
Eligibility Criteria
-----------------
Inclusion Criteria: avulsion fracture of the ASIS new fractures Exclusion Criteria: old avulsion fractures delayed fractures multiple fractures.

Ages Eligible for Study
-----------------
Minimum Age: 8 Years
Maximum Age: 18 Years

Sexes Eligible for Study
-----------------
All

Accepts Healthy Volunteers
-----------------
No

Study Plan
=================
How is the study designed?
-----------------

Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| conservative group<br>received conservative therapy involving bed rest with the affected lower extremity positioned with the hip and knee in flexion to ensure minimal tension of the muscles attached to the ASIS avulsion fracture. | |
| absorbable screws<br>received open reduction and internal fixation with fixation by absorbable screws. | Procedure: open reduction and internal fixation with fixation by absorbable screws<br>* Group A received conservative therapy involving bed rest with the affected lower extremity positioned with the hip and knee in flexion to ensure minimal tension of the muscles attached to the ASIS avulsion fracture. Group B received open reduction and internal fixation with fixation by absorbable screws.<br>|

What is the study measuring?
-----------------
Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| American Academy of Othopaedic Surgeons lower limb and hip scores | Stiffness of the Hip 0-5 scores, higher values represent a better outcome | 6th month | 
| American Academy of Othopaedic Surgeons lower limb and hip scores | swelling of the Hip 0-5 scores,higher values represent a better or worse outcome | 6th month | 
| American Academy of Othopaedic Surgeons lower limb and hip scores | Walking 0-5 scores ,higher values represent a better or worse outcome | 6th month | 
| American Academy of Othopaedic Surgeons lower limb and hip scores | Going up and goingdown stairs 0-5 ,higher values represent a better or worse outcome | 6th month | 
| American Academy of Othopaedic Surgeons lower limb and hip scores | bed rest 0-5 scores,higher values represent a better or worse outcome | 6th month | 
| American Academy of Othopaedic Surgeons lower limb and hip scores | Moving 0-5 scores,higher values represent a better or worse outcome | 6th month | 
| American Academy of Othopaedic Surgeons lower limb and hip scores | wear socks wear socks Wearing socks 0-5 scores,higher values represent a better or worse outcome | 6th month |