Raphael F de Souza, DDS, PhD University of Sao
McGill University , Montréal, Canada· Division
of Oral Health and Society.
Experience in the coordination of randomized
clinical trials as well as systematic reviews.
They tested the null hypothesis that patient
perceptions and clinical parameters would be
similar for the 3 treatments.
• Complete edentulism;
• Request of implant stabilization of
the existing lower conventional
• Clinically acceptable maxillary and
mandibular complete dentures;
• Adequate space in the anterior
mandible for the placement of four
mini implants and two conventional
implants (regular diameter);
• Ability to maintain adequate oral
hygiene and clean dentures;
• Systemic health status that permits
minor surgical procedures;
• Adequate understanding of written
and spoken Portuguese;
• Capacity of giving written informed
• Lack of minimum vertical
mandibular bone height of 11mm in
the interforaminal region;
• Acute or chronic symptoms of
• History of radiation therapy to the
• Specific conditions that may
jeopardize the treatment, i.e.
alcoholism and smoking;
• Severe/serious illness that requires
• Impaired cognitive function;
• Impossibility to return for
peri-implant health parameters.
Groups 1 and 2 presented a significantly lower plaque index
compared with group 3 at the time of overdenture insertion
and following 6 and 12 mo.
The occurrence of other prosthetic and peri-implant
complications was similar among groups
A. RANDOM SEQUENCE GENERATION
Selection bias (biased allocation to interventions) due to inadequate generation of a
Mini-implant-retained overdentures can achieve results
at least comparable with the standard of care for
edentulism, according to the patient perspectives.
The insertion of 4 mini-implants results in superior
OHRQoL and patient satisfaction as compared with 2
mini- or standard implants.
A major issue for using mini-implants, however, is their
lower implant survival rate compared with standard
Comlplications in abstract
Where are the questions ,,, where is the domain name
Starting from this domain this should be done at the outcome level
Second stage surgery ….pain perception,, chewing at 3 months
Confounder type of attachment effect on retention
Inconsistency ,, results of patient satisfaction remain the same as complete and in another section they improved in all groups