1.     Canadian Academy of Prosthodontics, 1965, Québec City, Quebec

2.     Province of Québec Association of Orthodontists, 1966, Montreal, Québec

3.     Montreal Dental Club, 1966, Montreal, Québec

4.     Northeastern Society of Orthodontists, 1967, Bermuda

5.     Burlington Medical Center, Burlington, Vermont

6.     Montreal Dental Club, 1970, Montreal, Québec

7.     Canadian Dental Association, 1971, Ottawa, Ontario

8.     The New Zealand Orthodontic Society, 1971, Rotura, New Zealand

9.     Montreal Dental Club Fall Clinic, 1972, Montreal, Québec

10.  Ottawa Dental Society, 1973, Ottawa, Ontario

11.  Montreal Dental Forum, 1974, Montreal, Quebec

12.  Montreal Dental Club, 1975, Montreal, Quebec

13.  Academy of General Dentistry, 1976, Toronto, Ontario

14.  Japan Orthodontic Society, 1976, Tokyo, Japan

15.  The Upstate Strang-Tweed Study Group, 1978, Grand Island, New York

16.  Northeastern Society of Orthodontists, 1979, Montreal, Quebec

17.  Greater Washington Orthodontic Study Club, 1980, Washington D.C.

18.  The Federation of Dental Societies of Greater Montreal, 1981, Montreal, Quebec

19.  The E.F. Muir and N.F.  Muir Memorial Lecture, 1981, Richmond, Virginia 

20.  Seventh District Orthodontic Society, 1981, Rochester, New York

21.  Western New York Orthodontic Group, 1981, Buffalo, N.Y.

22.  Quebec Association of Orthodontists, 1981, Montreal, Quebec

23.  Ottawa Dental Study Club, 1982, Ottawa, Ontario

24.  Greater Washington Orthodontic Study Club, 1982, Columbia, Maryland

25.  The University of Zurich, 1982, Zurich, Switzerland

26.  Toronto Orthodontic Club, 1982, Toronto, Ontario

27.  In-Office Course, 1982, Montreal, Québec

28.  Eastern Association of Strang-Tweed Study Group, 1982, New York City, N.Y.

29.  Dr. Paul Geoffrion Seminar, 1983. Montreal, Québec

30.  Tufts University, 1983, Boston, Mass.

31.  Georgetown University, 1983, Washington, D.C.

32.  German Orthodontic Society, 1984, Bruxelles, Belgium

33.  In-Office Course, 1984, Montreal, Quebec

34.  American Association of Orthodontists, 1985, Las Vegas, Nevada

35.  Université Catholique de Louvain, 1985, Bruxelles, Belgium

36.  North Carolina Orthodontic Association, 1986, Raleigh,

37.  In-Office Course, 1986, Montreal, Québec

38.  Cleveland Society of Orthodontists, 1986, Cleveland, Ohio

39.  Canadian Dental Association Grieve Memorial Lecture, 1986, Halifax, N.S.

40.  Middle Atlantic Society of Orthodontists, 1986, Philadelphia, PA

41.  Université Catholique de Louvain, 1987, Bruxelles, Belgium

42.  Orthodontic Alumni Society of Columbia University, 1987, White Plains, N.Y.

43.  Georgetown University Orthodontic Alumni and Greater Washington Orthodontic Study Club, 1987, Greenbelt, Maryland

44.  The Federation of Dental Societies of Greater Montreal, 1988, Montreal, Québec

45.  Northeastern Society of Orthodontists, 1988, Hartford, Connecticut

46.  Association Dentaire Francaise, 1988, Paris, France

47.  Puerto Rico Society of Orthodontists, 1989, San Juan, Puerto Rico

48.  University of Buffalo Orthodontic Alumni Association, 1989, Buffalo, N.Y.

49.  Georgetown University Orthodontic Alumnae, and Greater Washington Orthodontic Study Club, 1989, Washington, D.C.

50.  ln-Office Course, 1989, Montreal, Québec

51.  Emory   University   Orthodontic Alumni Association, 1990, Atlanta, Georgia              

52.  The University of Western Ontario, 1990, London, Ontario

53.  American Association of Orthodontists, 1990, Washington, D.C.

54.  The Canadian Foundation for the Advancement of Orthodontics, 1991, Québec City

55.  Rhode Island Association of Orthodontists, 1992, North Providence, UI.

56.  University of Montreal Orthodontic Department,1992, Montreal, Québec

57.  Middle Atlantic Society of Orthodontists, 1992, Philadelphia, PA

58.  Montreal Dental Club, 1993. Montreal, Québec

59.  American Association of Orthodontists, 1993, Toronto, Ontario

60.  The Israel Orthodontic Society,1994. Tel-Aviv, Israel

61.  Howard University Department of Orthodontics Anniversary Symposium,1994. Arlington, Virginia

62.  Southern Ontario Surgical Orthodontic Study , 1994                                      

63.  Alberta Society of Orthodontists, 1996, Calgary, Alberta

64.  International Association of Orofacial Myology, 1997, Montreal, Québec

65.  Canadian   Association   of   Orthodontists, 1998, Montreal, Québec

66.  American Association of Orthodontists, 2006, Toronto, Ontario

67.   McGill University Faculty of Dentistry, 2006, Montreal. Quebec

68.  Université de   Montreal, Department of Orthodontics, 2007, Montreal, Québec

69.  University Maryland, Department of Orthodontics, 2007, Baltimore Maryland