procedures

1. PREPROSTHETIC
SURGERY
DR ATTA-UR-REHMAN
BDS,FCPS
ASSISTANT PROFESSOR
ORAL & MAXILLOFACIAL SURGEON

2. Goal
• Rehabilitation of masticatory system
• Pre-prosthetic surgery involves operations
aiming to eliminate certain lesions or
abnormalities of the hard and soft tissues of the
jaws, so that the subsequent placement of
prosthetic appliances is successful.

3. Objectives
1 No evidence of intraoral or extraoral pathologic conditions
2 Proper interarch jaw relationship in the anteroposterior,
transverse, and vertical dimensions
3 Alveolar processes that are as large as possible and of the
proper configuration .The ideal shape is a broad U-
shaped ridge.
4 No bony or soft tissue protuberances or undercuts
5 Adequate palatal vault form
6 Proper posterior tuberosity notching
7 Adequate attached keratinized mucosa in the pri mary denture
bearing area
8 Adequate vestibular depth for prosthesis extension
9 Added strength where mandibular fracture may occur
10 Protection of the neurovascular bundle
11 Adequate bony support and attached soft tissue cov ering to
facilitate implant placement when necessary

4. Anatomy

5. Background
• Alveolar bone remodels significantly during
the first few months after losing teeth.
• Alveolus may suffer 40% reduction in height
and 60% in width within the first 6 months
after extraction.

6. What to do then?
1) Bone procedures
Recontouring procedures (Mandible/Maxilla)
Augmentation procedures (Grafting)
2) Soft tissue procedures
Excessive hypermobile/Inflammatory lesions
Abnormal muscle & frenum attachment
Ridge Extension procedures

7. Alveolar Ridge Recontouring
1) Simple Alveoplasty
2) Intraseptal alveoplasty
3) Maxillary tuberosity reduction
4) Buccal exostosis and undercuts
5) Lateral palatal exostosis
6) Mylohyoid ridge reduction
7) Genial tubercle reduction
8) Tori Removal (Mandibular/Maxillary)

8. Simple Alveoplasty
Alveoloplasty is the surgical procedure performed
to smooth or recontour the alveolar bone, aiming
to facilitate the healing procedure as well as the
successful placement of a future prosthetic
restoration.

10. Intraseptal Alveoplasty

11. Tori
1) Maxillary/Palatal Torus
2) Mandibular torus

12. Maxillary Torus

13. Mandibular Torus

14. Exostosis (Buccal/Lateral palatal)

15. Augmentation Procedures
1) Mandibular augmentation
Superior border augmentation
Inferior border augmentation
Hydroxyapatite Augmentation
2) Maxillary augmentation
Onlay bone grafting
Interpositional bone graft
Hydroxyapatite augmentation
Sinus lift procedure(Transantral grafting)

18. INTERPOSITIONALBONEGRAFT

19. Soft tissue procedures
1) Excessive hypermobile/Inflammatory lesions
2) Abnormal muscle & frenum attachment
3) SOFT TISSUE SURGERY FOR RIDGE

20. MaxillaryTuberosityReduction(SoftTissue)
Primary objective of soft tissue maxillary
tuberosity reduction is to provide adequate
interarch space for proper denture construction in
the posterior area and a firm mucosal base of
consistent thickness over the alveolar ridge
denture-bearing area.

22. InflammatoryFibrous Hyperplasia
Epulis fis-suratum or denture fibrosis
Generalized hyperplastic enlargement of mucosa and
fibrous tissue in the alveolar ridge and vestibular area,
which most often results from ill-fitting dentures.

23. 1)Surgicalexcision 2)Electrosurgical
3)Laserexcision

24. LABIAL FRENECTOMY(Z-Plasty,Secondary
intension)

25. Secondary intension

26. LINGUALFRENECTOMY

28. SOFTTISSUESURGERYFORRIDGE
PRIMARY GOAL
To provide an enlarged area of fixed tissue in the
primary denture-bearing area.
To improve extension in the area of the denture
flanges by removing the dislodging effects of
muscle attachments in the denture-bearing or
vestibular areas.

29. TranspositionalFlap Vestibuloplasty(Lip
Switch)(Kazanjian)
• A mucosal flap pedicled from the alveolar ridge
is elevated from the underlying tissue and
sutured to the depth of the vestibule.
• Inner portion of the lip is allowed to heal by
secondary epithelialization.
• Pre-requist 15mm anterior mandibular height

30. cont

31. VestibuleandFloor-of-MouthExtension
procedures(Trauner) Skingraft

32. SubmucosalVestibuloplastymaxilla
(Obwegeser)
• Procedure for correction of soft tissue
attachment on or near the crest of the
alve-olar ridge of the maxilla.
• This technique is useful when maxillary
alveolar ridge resorption has occurred but
the residual bony maxilla is adequate for
proper denture support.

36. THANK YOU
dratta80@yahoo.com