Table 1.

Systematic review of published literature

Author (year)	Sample size	Follow-up period (months)	Course of analysis	Technique	Type of fixation	Magnitude of movement	Method for measurement
Schendel et al. (1976)	24	29	Retrospective	LeFort I impaction	Rigid internal fixation	6 mm	Cephalogram Computerized model
Radney and Jacobs (1981)	10	6	Retrospective	LeFort I impaction	Rigid internal fixation	Not clear	Cephalogram
Wessberg et al. (1982)	25	24	Prospective	LeFort I impaction	Rigid internal fixation	Not clear	Cephalogram
Mansour et al. (1983)	14	6	Retrospective	LeFort I impaction	Rigid internal fixation	Not clear	Cephalogram
Sakima and Sachdeva 1987	20	12	Retrospective	LeFort I impaction	Rigid internal fixation	Not clear	Cephalogram
Nattestad A and Vedtofte P 1992	10	5	Retrospective	LeFort I impaction	Rigid internal fixation	Not clear	Cephalogram
Nadjmi N et al. (1998)	20	Not clear	Retrospective	LeFort I impaction	Rigid internal fixation	Not clear	Cephalogram
Rosen 1988	23	9.8	Retrospective	LeFort I impaction	Rigid internal fixation	6 mm	Cephalogram
Rosenberg et al. (2002)	11	12	Retrospective	LeFort I impaction	Rigid internal fixation	6 mm	Cephalogram
Steinhauser et al. (2008)	42	Not clear	Retrospective	LeFort I impaction	Rigid internal fixation	Not clear	Cephalogram
Wang YC et al. (2008)	10	3	Prospective	LeFort I impaction	Rigid internal fixation	Not clear	Cephalogram
Ksiezycki Ostoya et al. (2009)	22	15	Retrospective	LeFort I impaction	Rigid internal fixation	6 mm	Cephalogram
Abhuzinada S et al. (2013)	10	Not clear	Prospective	LeFort I impaction	Rigid internal fixation	Not clear	Cephalogram
Jayakumar J et al. (2019)	45	3	Prospective	LeFort I impaction	Rigid internal fixation	Not clear	Cephalogram
Peleg O et al. (2019)	20	6	Prospective	LeFort I impaction	Rigid internal fixation	6 mm	Cephalogram