L. Mayfield et al., GUIDED BONE REGENERATION IN DENTAL IMPLANT TREATMENT USING A BIOABSORBABLE MEMBRANE, Clinical oral implants research, 8(1), 1997, pp. 10-17
Citations number
40
Categorie Soggetti
Engineering, Biomedical","Dentistry,Oral Surgery & Medicine
The aim of this study was to evaluate an osteopromotive technique, usi
ng a bioabsorbable membrane, for its ability to restitute bone over bu
ccal fenestration and dehiscence defects following fixture installatio
n. 11 patients requiring dental implant treatment and exhibiting suffi
cient vertical height of the maxilla and compromised bucco-palatal dim
ensions, as determined clinically and radiographically, were included
in the study. 17 Branemark(R) titanium fixtures were placed with bucca
l defects which were augmented by a bioabsorbable membrane, Resolut(R)
. No complications were observed postoperatively. At 6-8 months, abutm
ent connection was performed, and clinical evaluation of the healed de
fect area was made. The number of exposed buccal threads at fixture in
stallation (median 8; range 2-19), and abutment connection (median 0;
range 0-5), respectively, was compared. Out of the 17 fixtures; 14 exh
ibited complete coverage with bone, whereas 3 showed some remaining th
reads. A small punch biopsy taken at abutment connection in an area wh
ere the membrane had been placed showed a combination of dense connect
ive tissue and bone. Radiographic evaluation of the marginal periimpla
nt bone level is in progress and results to date show a median bone lo
ss of 1.2 mm after a loading period of 4-6 months. Results show that f
ixture dehiscence and fenestrations, augmented with this bioabsorbable
membrane, demonstrate a highly significant amount of new bone formati
on.