Mandibular Osteotomy Plan using a modified Lockwood technique.

Ref: - Lockwood H. The Key Spacer Planning System.  Proc Inst. of Maxfac Tech.  1976; 67-83.

Manchester Metropolitan University - Maxillofacial Technology Course 'Orthognathic Surgery Model Planning' 1999.

Further reading: - 'A modification to the Lockwood Key Spacer Model Planning System' - G.J.Carmichael.  The Journal of Maxillofacial Prosthetics & Technology - Winter 2005. Vol 8.