3.22.23_Magda IJOI

Question 1

What study examined Strategies for implant surface decontamination in peri-implantitis?

Answer 1

Monje IJOI
A review of all possible techniques:
* Mechanical (metal scaler, titanium brush, Airflow, PEEK tip)
* Implantoplasty
* Chemical (saline, H2O2, citric acid, EDTA, phosphoric acid, CHX)
* Laser (Er:YAG (2940nm), Er;Cr:YSGG, Diode)
* Photodynamic
* Electrolytic
* Pharmacological (metronidazole, minocycline, doxycycline, tetracycline, CHX)

Mechanical strategies alone are insufficient, so adjunctive measures are encouraged

Question 2

What is the “1, 2, 3” mm rule of socket shield , per Dr. Wang?

Answer 2

1: 1mm gap between socket shield and implant
2: Need 2 mm from the gum level to the top of the coronal of the socket shield
3: Need 3mm Implant needs to be below the apical part of the socket shield by 3 mm

Question 3

What are the wavelengths of common dental lasers?

Answer 3

Er:YAG 2940nm
Nd:YAG 1064nm
Diode 980nm
CO2 9600 -10600

Question 4

How does Dr. Wang use tetracycline in peri-implantitis defects?

Answer 4

3 mins tetracycline on the implant surface. Then mix the bone graft with tetracycline and use to regenerate the bone

Question 5

What study described the radiographic protrusion of dental implants in the maxillary sinus and nasal fossae

Answer 5

Testori IJOI
Consensus of 31 experts - including Periodontists, maxillofacial surgeons, otolaryngologists, implantologists, radiologists.

Treat if symptomatic; start with pharmacology and surgery. Remove implant as a last resort.

Question 6

What study compared maxillary tuberosity vs. palate donor sites for soft tissue augmentation at implant placement?

Answer 6

Kotsailidi IJOI
20 patients
Same size of graft (for both palate & tuberosity)
Compared soft tissue augmentation via clinical measurements, PROM’s, and intraoral scan overlays

Results: Mean pain scores were significantly lower for the tuberosity group at week 1. Otherwise, NSSD among groups

Question 7

What study examines dental implant healing abutment decontamination?

Answer 7

Kyaw IJOI
Systematic review
Examines various decontamination methods for healing abutments

Chemical decontamination:
* Ultrasonic + 5.25% NaOCl for 15 mins -> debris on the screw thread and screw driver hole in SEM
* Presoaking detergent (2-5 mins) prior to ultrasonication treatment (10~15mins) -> no bacteria but carbon-based organic contaminants attached.
* Other adjunctive cleaning methods: wiping with disinfectant clothes and ultrasonication in various chemical solution -> blood remnants, increased surface roughness ….

Laser decontamination:
* Er:YAG laser treatment : calculus was removed efficiently. (only 1 study) without changing surface characteristics

Mechanical decontamination:
* Wipe with sponges soaked in alcohol and ultrasonication -> residual biological materiels
* Airflow with erythritol powder -> did not cause surface alternation and remove debris effectively
* Cavitron prophy jet with glycine powder -> can removal residual debris effectively

Electrochemical decontamination:
* Organic contaminants could be removed completely from the surfaces without altering the surface topography.

Chemical & electrochemical decontamination:
* autoclaving + the combination of NaOCl with subsequent electrochemical tx can remove soft and hard deposits from the surface of HAs without altering the surface topography.

Question 8

What study examined the fully digital workflow for PMMA-milled implant-supported overdentures?

Answer 8

Van de Winkel IJOI
Described the experimental digital workflow.