[A clinical study of osteotome sinus floor elevation and simultaneous implant placement in the periodontally compromised patients].
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To study the clinical effect of osteotome sinus floor elevation (OSFE) combined with simultaneous implant placement in the treatment of edentulous posterior maxilla subject to insufficient bone height in the periodontally compromised patients.Forty-seven Straumanns implants were placed in the posterior maxilla in 35 patients with the procedure of OSFE. The final prostheses were restored after 3 to 6 months. The follow-up period was 6 to 30 months. Radiographs were taken and PD, PLI, BOP were measured and analyzed.The overall survival rate was 95.74% during the study period. Forty-five out of the 47 implants were clinically stable and loaded without pain or any subjective sensation. The perforation ratio of the membrane was 4.26%. The average of PD around the implants was (3.22±1.07) mm. The average of the marginal bone loss was (1.38±0.59) mm.OSFE without bone graft proves to be an effective and predictable treatment for atrophic edentulous posterior maxillary region in patients with periodontitis, but the long-term effect needs further observation.Keywords:
Osteotome
Perforation
Sinus (botany)
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The objective was to establish a model in rabbits in which to study the healing events associated with localized indirect osteotome-mediated maxillary sinus floor elevation in conjunction with simultaneous placement of sintered porous-surfaced dental implants. On one side of the maxilla of each of 28 rabbits, a sintered porous-surfaced titanium alloy press-fit implant was placed without the use of a bone graft material, while on the collateral side an implant was placed after first adding Bio-Oss graft particles to the osteotomy. Specimens were retrieved for morphometric assessment of bone contact and bone ingrowth of the porous implant surface after 2, 4, 6 and 8 weeks of healing. All implants became osseointegrated by bone ingrowth into the porous implant surface. While the addition of graft particles did not result in a statistically significant increase in the parameters measured, a trend for greater bone contact and particularly bone ingrowth at the apices of the implants was seen as healing time increased. The rabbit maxillary sinus can be used to study healing following placement of sintered porous-surfaced dental implants using the indirect sinus elevation procedure.
Osteotome
Sinus (botany)
Sinus lift
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To evaluate the number of patients with dental implants who present to a dental school clinic for screening and to report the prevalence of peri-implant bone level change detected on digital panoramic radiographs of those subjects.Patient screening files for 9,422 patients over a 2-year period were examined to see how many patients presented with dental implants. Those patients with at least one implant were further evaluated by measuring the bone level on the mesial and distal sides of the implant using the screening radiograph.A total of 187 patients (2%) had at least one implant. In regard to implants, 423 were examined and 146 (33%) had no detectable bone loss defined as bone level below the top of the implant. When thresholds of bone loss were evaluated, 109 implants (25%) had ≥ 2 mm of bone loss on either the mesial or distal sides or both. The median bone loss was 1.74 mm for the 277 implants with detectable bone loss and 2.97 mm for the 109 implants that had ≥ 2 mm bone loss. Interestingly, patients who were ≥ 70 years of age had significantly (P = .03) more bone loss in the mandible compared with the maxilla, while patients who were 60 to 69 years of age had significantly greater loss in the maxilla.These data reveal that for patients presenting to the dental school for a screening over a 2-year period, 1.98% had one or more dental implants. Furthermore, those patients with implants had a minimum amount of bone loss as measured from the top of the implant.
Mandible (arthropod mouthpart)
Tooth loss
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Osteotome
Alveolar ridge
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Osteotome
Perforation
Sinus (botany)
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ABSTRACT Purpose: The aim of this prospective randomized controlled clinical study was to assess the crestal bone loss and the implant stability in implants that were placed by the osteotome technique compared with the conventional drilling technique. Materials and Methods: Forty‐six screw type Straumann SLA® oral implants (Straumann AG, Waldenburg, Switzerland) were inserted in the anterior segment of maxilla of 30 patients. The implant site was prepared randomly using either osteotome technique (test group) or the conventional drilling technique (control group). Radio frequency analysis (RFA) values at implant placement and after 3 months were recorded. The crestal bone loss was measured using digital subtraction radiography technique after 3, 6, and 12 months. Results: RFA demonstrated a statistically significant higher primary stability for implants in the osteotome group than that of the conventional group ( p = .026) at the time of implant insertion. However, there was no statistically significant difference between both groups 3 months after the surgery ( p = .06). At month 3, the osteotome group caused significantly more crestal bone loss than the conventional group ( p = .04). At months 6 and 12, both groups had comparable bone levels ( p = .29). Conclusion: Osteotome technique yielded higher primary stability than conventional drilling technique. However, this technique was not superior to conventional technique after 3 months.
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Resonance frequency analysis
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This retrospective study was undertaken to provide information on the radiographic status of blade implants which had been placed in patients in a private dental office at least five years prior to this study. Radiographs and records of 66 implants were studied in 31 patients. Six implants had been removed from five different patients; 60 implants were still in place at the time of this study. In general, the blade implants fared better in the mandible than in the maxilla. Analysis of the data suggests that although as a group patients with stable periodontal disease had significantly fewer implants lost, on an individual basis there is no predictable correlation between the periodontal status of the natural dentition and the survival of a blade implant as indicated by the radiographs. The change in the height of the crestal bone does not appear to be a critical determinant in the retention of the implant. There was no relationship between the time of loading and the survival of a blade implant.
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ObjectiveTo evaluate the clinical results of sinus floor elevation technique with simultaneous dental implantation in the posterior maxilla.MethodsA total of 79 patients underwent osteotome sinus floor elevation from 2009 to 2012. Bio-Oss and PRF were used as augmentation material,with simultaneous placement of implants.ResultsThe implant lengths ranged from 10 to 13 mm. The average height increase of the implant site was 3.8(2 to 5.7). Sinus membrane perforation occurred in 3 cases and the dental implantation was abandoned. Totally 87 implants were placed. At second stage of surgery,3 failed implants were removed. Two implants were removed 18 months after prosthetic rehabilitation. One implant was lost due to progressive bone loss. The overall survival rate was 93.1%(81/87). No clinical complications of the maxillary sinus area were observed during a follow-up period of 12 to 36 months.ConclusionOsteotome sinus floor elevation with bone graft was a predictable and safe technique. It simplifies the surgical process and can be taken predictably for implant placement with surgical technique.
Osteotome
Sinus (botany)
Perforation
Sinus lift
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To investigate peri-implant bone resorption around 108 ITI dental implants 1 year after prosthetic loading using extraoral panoramic, conventional intraoral periapical, and digital radiologic techniques.A total of 108 implants were placed (59 in the maxilla and 49 in the mandible) in 42 patients (16 men and 26 women) with a mean age of 44.2 years (range 14 to 68 years). Orthopantomographic, conventional periapical, and digital radiographs were obtained at loading and again 1 year later. Bone loss was calculated from the difference between the initial and final measurements.Mean loss in alveolar bone height was determined to be 1.36 mm by extraoral panoramic radiography, 0.76 mm by intraoral periapical radiography, and 0.95 mm by digital radiography. The implants located in the maxilla and those placed in patients who smoked 11 to 20 cigarettes per day were associated with significantly greater bone loss.The results in relation to peri-implant bone loss in the first year after loading were similar to those published by other authors.Conventional periapical films and digital radiographs were more accurate than orthopantomography in the assessment of peri-implant bone loss. Smoking and implant location in the maxilla were associated with increased peri-implant marginal bone resorption.
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Osteotome single-stage dental implant placement with and without sinus elevation: a clinical report.
Forty-three sites in 16 patients were selected for placement of implants using osteotomes in a single-stage surgical technique. Most sites were treated to enhance bone quality. Sixteen sites in the posterior maxilla had sinus elevation performed in conjunction with implant placement. No soft tissue coverage of the implant cover screw was attempted in either the sinus-elevated or the nonelevated sites. Sinus elevation was significant relative to baseline (mean gain 3.25 mm, P < .01). The implant survival rate was 95.3%.
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Sinus (botany)
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To assess histomorphometric parameters of dental implants placed in partially edentulous maxillae of minipigs.In 9 minipigs, 6 XiVE implants were placed on each side of the maxilla, either after implant site preparation by an osteotome technique or by spiral drills. The implants were restored with fixed provisional restorations and loaded either immediately or after healing periods of up to 5 months. After a loading period of 6 months, the animals were sacrificed and the implants were retrieved together with the adjacent bone. Histologic specimens were prepared and bone-to-implant contact (BIC) ratio, interthread bone area, and peri-implant bone area were determined.An analysis of variance revealed that the BIC ratio on the palatal side was significantly influenced by the preparation technique of the implant site (P = .001) and by the healing period (P = .02). After implant site preparation by an osteotome technique, higher BIC values were achieved for implants that were loaded either immediately or after healing periods of 1 to 3 months. After healing periods of 4 to 5 months, implant site preparation with spiral drills showed slightly better results in regard to BIC. Interthread bone area and peri-implant bone area did not differ significantly statistically for the 2 implant placement techniques and the 3 healing periods.After 6 months of functional loading in the maxilla, successful immediately loaded implants performed the same as implants subjected to an unloaded healing period prior to loading as far as histomorphometric data were concerned. Prospective randomized clinical studies should be carried out in humans to compare immediate loading to loading after an unloaded healing phase.
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