Indian Dental Academy: will be one of the most relevant and exciting training center with best faculty and flexible training programs for dental professionals who wish to advance in their dental practice,Offers certified courses in Dental implants,Orthodontics,Endodontics,Cosmetic Dentistry, Prosthetic Dentistry, Periodontics and General Dentistry.

1. Prosthodontic principles of
obturator design
INDIAN DENTAL ACADEMY
Leader in continuing dental education
www.indiandentalacademy.com
www.indiandentalacademy.com

2. Introduction
• In 1978 the late Dr Mohammed Aramany
presented the first published systemof
classification of postsurgical maxillary defects.
He divided all defects into 6 categories based on
the relationship of the defect to the remaining
teeth and the frequency of occurrence of the
defect in a relatively small patient population that
he observed over a 6-year period at the
Regional Center for Maxillofacial Rehabilitation
in the Pittsburg Eye and Ear Hospital.
www.indiandentalacademy.com

3. • The classification could be used to
develop a series of basic obturator
designs that have proven clinically
successful and scientifically acceptable in
particular situations. These templates
could then be applied to other dental
arches of similar classification or logically
modified when slightly different situations
presented.
www.indiandentalacademy.com

4. www.indiandentalacademy.com

5. Definition
www.indiandentalacademy.com

6. General principles
• The general principles of removable partial
denture (RPD) design apply to obturator
prosthesis design as well.
Relevant among these are
(1) the need for a rigid major connector;
(2) guide planes and other components that
facilitate stability and bracing;
(3) a design that maximizes support;
www.indiandentalacademy.com

7. (4) rests that place supporting forces along
the long axis of the abutment tooth;
(5) direct retainers that are passive at rest
and provide adequate resistance to
dislodgment without overloading the
abutment teeth
(6) control of the occlusal plane that
opposes the defect, especially when it
involves natural teeth.
www.indiandentalacademy.com

8. Prognosis
• (1) the size (amount remaining after
surgery) and curvature of the arch;
• (2) the quality of the tissue covering the
ridge and lining the defect;
• (3) an abutment alignment that is curved
instead of linear;
• (4) the availability of teeth on the defect
side for support and retention.
www.indiandentalacademy.com

9. Classification
www.indiandentalacademy.com

10. • Class I
• Class II
www.indiandentalacademy.com

11. • Class III
• Class IV
www.indiandentalacademy.com

12. • Class V
• Class VI
www.indiandentalacademy.com

13. Class I
www.indiandentalacademy.com

14. www.indiandentalacademy.com

15. www.indiandentalacademy.com

16. Class II
www.indiandentalacademy.com

17. www.indiandentalacademy.com

18. www.indiandentalacademy.com

19. www.indiandentalacademy.com

20. www.indiandentalacademy.com

21. www.indiandentalacademy.com

22. www.indiandentalacademy.com

23. www.indiandentalacademy.com

24. www.indiandentalacademy.com

25. Reference articles
• Basic principles of obturator design for
partially edentulous patients. Part I:
Classification . (Mohamed A.
Aramany).
• Basic principles of obturator design for
partially edentulous patients. Part II:
Design principles . (Mohamed A.
Aramany).
www.indiandentalacademy.com

26. www.indiandentalacademy.com