CIT Bone Grafting & Osseointegration Flashcards

A cortical block graft harvested from the patient's chin or ramus is secured at the recipient site using:

Answer: Titanium fixation screws

Titanium micro-screws (fixation screws) rigidly stabilize block grafts to prevent micromovement during healing, which is essential for successful revascularization.

Which complication can occur if an implant is placed too close to the maxillary sinus without adequate bone or a sinus lift?

Answer: Sinus perforation and chronic sinusitis

Placing an implant into the sinus can perforate the Schneiderian membrane, potentially leading to chronic sinusitis and implant failure.

Peri-implantitis is defined as:

Answer: An inflammatory disease affecting soft tissue and supporting bone around a functioning implant

Peri-implantitis is a plaque-associated pathological condition characterized by inflammation in the peri-implant mucosa and progressive loss of supporting bone.

What does the Hounsfield unit (HU) value measured on a CBCT scan indicate in implant planning?

Answer: The density and quality of available bone at the implant site

Hounsfield units quantify bone density in CBCT scans, allowing the clinician to predict bone quality (D1–D4) and adjust the surgical protocol accordingly.

Which bone quality classification (Lekholm & Zarb) describes bone composed almost entirely of dense cortical bone with little cancellous core?

Answer: Type D1

Type D1 (Class I) bone consists almost entirely of homogeneous compact cortical bone, offering high primary stability but reduced vascularity.

Immediate implant placement refers to placing an implant:

Answer: Into the extraction socket at the same appointment as tooth removal

Immediate placement means the implant is inserted directly into the fresh extraction socket at the time of extraction, reducing overall treatment time and preserving alveolar bone.