Long-term evaluation of implant survival in augmented sinuses: a case series.
This study compared bone grafting regimens and different implant surfaces used for sinus augmentation and presented long-term implant success rates in augmented sinuses. Two hundred fifty-seven consecutive patients with 625 implants were evaluated retrospectively. In phase 1, 188 sinuses were grafted with (1) autograft alone; (2) autograft + demineralized freeze-dried bone allograft (DFDBA) + absorbable hydroxyapatite (AHA) in a ratio of approximately 1:3:3; or (3) DFDBA + AHA + nonabsorbable HA (NHA) in a ratio of approximately 1:1:1. In phase 2, grafting regimen 3 (combination of DFDBA + AHA + NHA) was used in another 69 patients. Data were analyzed based on bone grafting regimen, implant surface texture, and time of implant placement (immediate or delayed). In phase 1, graft type 3 had the lowest implant failure rate (2.7%), followed by type 2 (14.3%) and type 1 (44.4%). The overall implant failure rate was 3.6%. Smooth implants showed the highest failure rate (21.8%), followed by titanium plasma-sprayed (2.9%) and HA-coated (0.7%) implants. In phase 2, the overall implant survival rate was 92.5% after 3 years. Smooth implants showed the highest failure rate (41.7%), followed by sand-blasted, large-grit, acid-etched (6.8%) and HA-coated (3.4%) implants. All failures occurred when implants were placed simultaneously with sinus grafts. This study suggests that long-term implant success can be obtained when maxillary sinuses are augmented with a combination of DFDBA + AHA + NHA. Rough surfaces and delayed implant placement seem to increase implant success in these areas.
Department of Periodontics and Oral Medicine, University of Michigan School of Dentistry, Ann Arbor, Michigan 48109-1078, USA.
Nobuyuki
N
Yamamichi
Tatsumasa
T
Itose
Rodrigo
R
Neiva
Hom-Lay
HL
Wang
D020341:Absorbable Implants; D000134:Acid Etching, Dental; D000540:Alveolar Ridge Augmentation / Q000379:methods*; D018786:Bone Substitutes / Q000627:therapeutic use; D016025:Bone Transplantation / Q000379:methods*; D020099:Coated Materials, Biocompatible / Q000737:chemistry; D045662:Dental Etching; D003758:Dental Implantation, Endosseous / Q000379:methods; D015921:Dental Implants; D003764:Dental Materials / Q000737:chemistry; D017267:Dental Prosthesis Design; D019232:Dental Restoration Failure; D017886:Durapatite / Q000737:chemistry / Q000627:therapeutic use; D005500:Follow-Up Studies; D006801:Humans; D008137:Longitudinal Studies; D008437:Maxilla / Q000601:surgery*; D008443:Maxillary Sinus / Q000601:surgery*; D012189:Retrospective Studies; D013499:Surface Properties; D014025:Titanium / Q000737:chemistry; D016896:Treatment Outcome
D018786:Bone Substitutes; D020099:Coated Materials, Biocompatible; D015921:Dental Implants; D003764:Dental Materials; C118792:OsteoGraf-N; D017886:Durapatite; D014025:Titanium