Two Years after Loading Performance of Implant-Supported Overdenture with Metal Bar and Low-Profile Attachments: A Prospective Case Series Multicenter Clinical Study

Table 1

Inclusion and exclusion criteria.

Inclusion criteria	Exclusion criteria
Aged 18 years or older	General contraindications to oral surgery
Signed informed consent	Pregnancy or nursing
Need of an implant overdenture in one arch	Treatment with intravenous bisphosphonates
Cawood and Howell class III to VI	Substance abuse (drugs or alcohol)
Two years after loading follow-up	Heavy smokers (≥11 cigarettes per day)
Available radiographs (implant loading and follow-ups)	Immediate postextractive implants
Patients refusing guided bone reconstruction	Irradiation of the neck or head area in the past 5 years
Need for lip support	Poor oral hygiene (bleeding on probing >25%)
	Untreated periodontitis
	Absence of teeth in the opposite arch
	Allergy or adverse reactions to the restorative materials
	Less than two-year follow-up