The study of distraction osteogenesis with nitinol shape memory alloy spring controlled by infrared light.
OBJECTIVE
The objective of this study was to investigate the feasibility of distraction osteogenesis with a nitinol shape memory alloy spring controlled by infrared light.


METHODS
In each of 20 New Zealand white rabbits, a critical-size defect (15 x 10 mm) was made in the body of the mandible, and a 10 x 8-mm segmental osteotomy was performed just anterior to the defect to create a transporting disk. A heat-controlled distractor and a temperature detector were then inserted (experimental group). Nothing was attached to the other side of the mandible (control group). After a 2-day latency period, the distractor was activated by the infrared at a rate of once per day for 9 days. The contralateral side was treated with the same infrared light. Gross, radiographic, and histologic analyses and dual energy x-ray absorptiometry were performed at regular intervals.


RESULTS
In the experimental group, the mandibular defect was reconstructed, whereas in the control group it was not. The histologic appearance of regenerated bone was similar to that observed with traditional distraction osteogenesis.


CONCLUSIONS
Distraction osteogenesis using a nitinol spring controlled by infrared light is possible.
Wang
Cheng
C
Department of Oral and Maxillofacial Surgery, Guanghua Institute and School of Stomatology, Sun Yat-sen University, Guangzhou, PR China.
Zeng
Rong-sheng
RS
Wang
Jian-ning
JN
Huang
Hong-zhang
HZ
Sun
Jun
J
Luo
Zhi-bin
ZB
D015502:Absorptiometry, Photon; D000497:Alloys; D000818:Animals; D003035:Cobalt; D003722:Dental Alloys; D003799:Dental Stress Analysis; D004548:Elasticity; D005240:Feasibility Studies; D007259:Infrared Rays; D008334:Mandible / Q000000981:diagnostic imaging / Q000601:surgery*; D009532:Nickel; D019857:Osteogenesis, Distraction / Q000295:instrumentation* / Q000379:methods*; D011817:Rabbits; D011897:Random Allocation; D014025:Titanium; D044366:Transition Temperature
D000497:Alloys; D003722:Dental Alloys; C093972:titanium-nickel-cobalt alloy; C013616:nitinol; D003035:Cobalt; D009532:Nickel; D014025:Titanium