Effect of Shape and Surface Treatment of the Transmucosal Abutments on Peri-implant Health.

Effect of Shape and Surface Treatment of the Transmucosal Abutments on the Bone-implant-contact and the Peri-implant Health, .

The sample was comprised by 10 patients in which 40 dental implants are placed in an atrophic maxilla. All the implants were connected to 4 types of transepithelial abutment: i.e: parallel anodized abutment(n=10); parallel mechanized abutmen(n=10)t, convergent anodized abutment(n=10); and convergent mechanized abutment (n=10) three months after insertion implants were extracted with the surrounding hard and soft tissues for the histological evaluation of the clinical performance.

Implants were immediately covered with this type of abutments after insertion. This is the most common procedure. It would be the gold standard

Implants were immediately covered with this kind of abutments after insertion. Only the surface treatment varies to the gold standard

Implants were immediately covered with this kind of abutments after insertion. Only the geometry of the emergence profile varies with regards to the gold standard

Implants were immediately covered with this kind of abutments after insertion. Both the surface treatment and the geometry vary with regards to the gold standard

It is a Percentage estimation of native bone in direct contact to implant determined by histological assessments (optical microscopy)

Histological assessments as ordinal variables of the grade of inflammatory infiltrate (none, minor, major)according to standard guidelines.

Histological assessments as ordinal variables of the density of the collagen fibers (low, medium, high) according to standard guidelines.

Inclusion Criteria: totally edentulous patients in the upper arch and carriers of conventional complete dentures for more than ten years, without temporomandibular disorders Exclusion Criteria: evidence of systemic or psychic pathology that contraindicates implant treatment.