preprosthetic surgery

Question 1

What is the significance of understanding oral cavity anatomy in preprosthetic surgery? ==

Answer 1

It helps improve denture bearing areas and ensure stability and retention.

Question 2

Why is it important to know the anatomy of soft tissues in preprosthetic surgery? ==

Answer 2

To ensure proper function, esthetics, and avoid complications during denture placement.

Question 3

What are the anatomical landmarks essential for preprosthetic surgery? ==

Answer 3

Alveolar bone, oral mucosa, and vestibular depth are crucial for supporting dentures.

Question 4

What are the criteria for an ideal ridge for denture support? ==

Answer 4

Adequate width and height, uniform mucosa thickness, elimination of undercuts, and U-shaped ridge.

Question 5

Why should sharp ridges or bony protuberances be eliminated in preprosthetic surgery? ==

Answer 5

To prevent irritation and improve denture retention and comfort.

Question 6

Why is vestibular depth important in preprosthetic surgery? ==

Answer 6

Adequate depth provides better denture stability and retention.

Question 7

What is alveoloplasty and its purpose? ==

Answer 7

It is the reshaping of the alveolar ridge to allow better denture fit and healing post-extraction.

Question 8

What is the difference between alveoloplasty and alveolevotomy? ==

Answer 8

Alveoloplasty is recontouring the bone; alveolevotomy is the removal of bony parts during extraction.

Question 9

What is the indication for intraseptal alveoplasty? ==

Answer 9

It is indicated when there is mild maxillary prognathism or undercuts in the labial vestibule.

Question 10

What surgical steps are involved in a simple alveoloplasty? ==

Answer 10

Ridge incision, flap reflection, bone contouring, soft tissue trimming, and suturing.

Question 11

What are the indications for torus palatinus removal? ==

Answer 11

Interference with denture construction, ulcerated mucosa, and speech difficulty.

Question 12

How is torus palatinus surgically removed? ==

Answer 12

Through a double Y incision, flap reflection, bone division using a bur, and flap suturing.

Question 13

What is the complication of torus removal involving the nasal cavity? ==

Answer 13

Drilling into the nasal cavity can cause nasal bleeding.

Question 14

What is torus mandibularis and its complications if left untreated? ==

Answer 14

A bony exostosis on the lingual mandible, which can interfere with denture fit, cause discomfort, and lead to speech issues.

Question 15

What is the surgical technique for torus mandibularis removal? ==

Answer 15

Crestal incision, trough creation, bone removal, smoothing, and flap suturing.

Question 16

How does the genial tubercle interfere with denture placement? ==

Answer 16

Its prominence can affect denture stability in cases of advanced alveolar ridge resorption.

Question 17

What are the steps in removing the genial tubercle? ==

Answer 17

Crestal incision, mucoperiosteal flap reflection, and smoothing with bone file.

Question 18

How does the mylohyoid ridge affect denture placement? ==

Answer 18

Ridge prominence due to bone resorption interferes with the denture base, requiring surgical contouring.

Question 19

What is the surgical correction technique for mylohyoid ridge interference? ==

Answer 19

Crestal incision, mylohyoid muscle detachment, bone smoothing, and soft tissue suturing.

Question 20

What is the role of vestibuloplasty in ridge correction? ==

Answer 20

It deepens the vestibule to enhance denture stability when bony height is sufficient but soft tissue attachment is limiting.

Question 21

What is the importance of lip switch vestibuloplasty? ==

Answer 21

It increases vestibular depth by repositioning soft tissues for better denture support.

Question 22

What are the indications for frenectomy in preprosthetic surgery? ==

Answer 22

Interference with denture stability, peripheral seal issues, and orthodontic diastema correction.

Question 23

What is the surgical technique for labial frenectomy? ==

Answer 23

Clamping with hemostats, elliptical incision, wound margin undermining, and suturing at vestibular depth.

Question 24

What complications can arise from short lingual frenum? ==

Answer 24

It can affect tongue movement, speech, and oral hygiene.

Question 25

How is lingual frenectomy performed? ==

Answer 25

Hemostat clamping, vertical incision, wound undermining, and suturing.

Question 26

What is a flabby ridge and how is it corrected? ==

Answer 26

Hypermobile tissue due to bone resorption or ill-fitting dentures, corrected by excision and tissue repositioning.

Question 27

How is inflammatory fibrous hyperplasia (denture fissuratum) managed surgically? ==

Answer 27

Through simple excision, laser, or electrosurgery, with suturing to preserve vestibular depth.

Question 28

What complications can arise from excision of denture fissuratum? ==

Answer 28

Obliteration of the vestibule and improper wound healing.

Question 29

How is an enlarged maxillary tuberosity corrected surgically? ==

Answer 29

Soft tissue or bone excision through elliptical or crestal incision, trimming, and suturing.

Question 30

What methods are used to manage alveolar ridge atrophy? ==

Answer 30

Vestibuloplasty and ridge augmentation are used depending on bone height and width deficiencies.

Question 31

What are the common techniques used for vestibuloplasty? ==

Answer 31

Submucosal, secondary epithelization (Kazanjian technique), and skin/mucosal grafting.

Question 32

What is ridge augmentation, and when is it indicated? ==

Answer 32

It is the surgical enhancement of alveolar ridge height and/or width when bone is deficient.

Question 33

What is distraction osteogenesis and its role in preprosthetic surgery? ==

Answer 33

It lengthens bone and soft tissue simultaneously, used for severe ridge resorption cases.

Question 34

What are the different bone graft materials used in ridge augmentation? ==

Answer 34

Autogenous bone, allografts (FDBA, DFDBA), xenografts, and alloplastic materials like hydroxyapatite.

Question 35

What are the advantages of onlay bone grafts in mandibular augmentation? ==

Answer 35

They increase ridge width with minimal bone resorption and predictable results.

Question 36

What is the sandwich technique in mandibular augmentation? ==

Answer 36

A horizontal osteotomy with bone grafting to increase ridge width, especially in the anterior mandible.

Question 37

What are the common complications associated with ridge augmentation surgeries? ==

Answer 37

Graft resorption, infection, and donor site morbidity.

Question 38

What is the purpose of maxillary sinus lifting? ==

Answer 38

It increases bone height for implant placement in the posterior maxilla.

Question 39

What are the steps in direct sinus lifting for maxillary ridge augmentation? ==

Answer 39

Lateral wall approach, sinus membrane elevation, bone graft placement, and membrane stabilization.

Question 40

How does the inferior border augmentation prevent mandibular fracture? ==

Answer 40

It reinforces the mandible by placing grafts on the inferior border, especially in cases of severe bone loss.

Question 41

What are the advantages of mandibular superior border augmentation? ==

Answer 41

It increases ridge height, supporting prostheses and maintaining esthetics in severely resorbed mandibles.

Question 42

How is a vestibuloplasty with a submucosal approach performed? ==

Answer 42

Mucosa is separated from connective tissue, and the soft tissue is displaced or removed to create a deeper vestibule.

Question 43

What are the indications for performing a secondary epithelization vestibuloplasty? ==

Answer 43

When there is adequate bone height but insufficient mucosa, causing ulceration and a shallow vestibule.