1/17 IJOI - Hoda Flashcards
Describe how sleeveless guided implant placement compares to regular implant approaches.
In vitro study that is Matt Galli’s thesis
Galli et al IJOI
Used 30 resin maxillary casts that replicated “cortical and cancellous” bone in healed and immediate extraction sites.
3.5 x 13mm Epikut Plus implants were placed. Implant deviation was measured as comparison from the planned CBCT positions.
Compared:
* Conventional (closed-sleeve) guides
* Open-frame sleeveless guide
* Freehand
Results:
Sleeveless guides had 1.6X less angular deviation than freehand. The sleeveless guides also had the smallest deviations overall in apical and angular deviations.
Describe the results of extra-short (4mm) implants placed after regenerative failures in the posterior atrophic mandible.
Barausse et al. IJOI
Retrospective study
Follow up ≥1 year
35 patients with 103 extra short (4mm) implants were followed. Authors examined implant failures, complications, and marginal bone loss.
RESULTS: Failure rate was 3% at the patient level, and 2% at the implant level. So, overall survival rates were 97% patient-level, and 98% implant level.
MBL at 1 year was about 0.5mm total.
Concluded that extra short (4mm) implants are feasible for atrophic posterior mandible restorations.
NOTE: implants were splinted and about 3 were placed per patient.
Does placement of one-piece zirconia implants affect the crestal bone loss?
Alkhouri et al IJOI
Retrospective study.
69 patients who had immediate or delayed placement of one-piece zirconia implants.
Group A: Immediate implant placement
Group B: Delayed implant placement (3+ months)
PISA consensus for clinical implant success:
* Group I: No tenderness, ,mobility, pain, or exudate, and <2 mm radiographic bone loss.
* Group II: “Satisfactory survival” with no mobility, pain, or tenderness, but showing 2-4 mm radiographic bone loss
* Group III: No mobility but with >4 mm radiographic bone loss but not exceeding half of implant length; or, any history of exudate.
* Group IV: “Implant failure” - mobility, pain on loading, uncontrolled exudate, or bone loss beyond 50% of implant
Success rate per PISA classifications:
Group I (<2mm bone loss): Immediates 92%, Delayed 95%
Group II (2-4mm bone loss): Immediates 8%, delayed 4%
SSD bone loss in smokers (1.3 mm versus 0.8mm in nonsmokers)
Conclusion: Single-piece zirconia implants have favorable results at 1 year.
Describe Dr. Saleh’s technique on the papilla reconstruction using a Vertical Interproximal Tunnel Approach (“VITA”)
Saleh et al IJOI
The Vertical Interproximal Tunnel Approach (VITA) is a papilla reconstruction technique around implants.
- A CTG is harvested, and a buccal vestibular incision created.
- Another incision is created on the palate.
- Tunneling is done from the access incisions and underneath papillas.
- The CTG is threaded in using guide sutures and is added beneath the papilla area.
- The tunneled flap is coronally advanced and sutured, and the access incisions are sutured.
Describe the study on Intrasocket reactive tissue: The state of current knowledge.
- by Mostafa -
Shehabeldin et al IJOI
Narrative literature review
- Intrasocket reactive tissue (ISRT): chronic infected inflammatory tissues. Histology shows bacterial aggregates surrounded by PMN’s.
- An alternative term for ISRT is “granulomatous tissue” (instead of granulation tissue)
Granulomatous tissue has been investigated as possible socket seal material. However, this is somewhat controversial.
What is the influence of supracrestal tissue adhesion on the implant marginal bone level?
Wenwen Liu, Jon Misch, HL Wang IJOI
To avoid peri-implant marginal bone resorption, sufficient space must be allowed for the Supracrestal Tissue Adhesion (STA).
Thick mucosa- allows implant placement at any level that allows for a 2-4 mm abutment height.
Thin mucosa- may require subcrestal implant placement to allow 3mm of STA.
- Marginal bone loss is 2x more severe in <2 mm abutments, compared with >2mm abutments.
