title: The study of distraction osteogenesis with nitinol shape memory alloy spring controlled by infrared light.
abstract: 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.
authors.affiliation: Department of Oral and Maxillofacial Surgery, Guanghua Institute and School of Stomatology, Sun Yat-sen University, Guangzhou, PR China.
authors.forename: Cheng
authors.initials: C
authors.lastname: Wang
authors.forename: Rong-sheng
authors.initials: RS
authors.lastname: Zeng
authors.forename: Jian-ning
authors.initials: JN
authors.lastname: Wang
authors.forename: Hong-zhang
authors.initials: HZ
authors.lastname: Huang
authors.forename: Jun
authors.initials: J
authors.lastname: Sun
authors.forename: Zhi-bin
authors.initials: ZB
authors.lastname: Luo
mesh_terms: 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
chemical_list: D000497:Alloys; D003722:Dental Alloys; C093972:titanium-nickel-cobalt alloy; C013616:nitinol; D003035:Cobalt; D009532:Nickel; D014025:Titanium