| 1. |
- Bergkvist, Göran, et al.
(författare)
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Bone Density at Implant Sites and Its Relationship to Assessment of Bone Quality and Treatment Outcome
- 2010
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Ingår i: INTERNATIONAL JOURNAL OF ORAL and MAXILLOFACIAL IMPLANTS. - : Quintessence Publishing Co, Inc. - 0882-2786. ; 25:2, s. 321-328
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Tidskriftsartikel (refereegranskat)abstract
- Purpose: To investigate the relationship between bone mineral density (BMD) before implant placement, implant stability measures at implant placement, and marginal bone loss of immediately loaded implants after 1 year in situ. Materials and Methods: Consecutively recruited patients received Straumann SLActive implants loaded with fixed provisional prostheses within 24 hours. BMD was measured from computed tomographic images before implant placement. Alveolar bone quality was assessed during surgery. Implant stability-both rotational and as measured with resonance frequency analysis- and marginal bone height were assessed at implant placement and after 1 year. The Pearson correlation coefficient was used to calculate correlations, and significance was considered when P andlt; .05. Results: Twenty-one patients received 137 implants (87 in maxillae and 50 in mandibles). BMD was significantly correlated with bone quality classification in both arches (P andlt; .001). Mean BMD was also significantly correlated with stability values (P andlt; .001). Mean marginal bone loss at implant surfaces differed, but not significantly, at the 1-year follow-up, regardless of BMD values (P = .086) and measured stability (rotational stability P = .34, resonance frequency analysis P = .43) at implant placement. Conclusion: Within the limits of this study, it can be concluded that computed tomographic examination can be used as a preoperative method to assess jawbone density before implant placement, since density values correlate with prevailing methods of measuring implant stability. However, in the short time perspective of 1 year, there were no differences in survival rates or changes in marginal bone level between implants placed in bone tissue of different density.
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| 2. |
- Bergkvist, Göran, et al.
(författare)
-
Bone density at implant sites and its relationship to assessment of bone quality and treatment outcome
- 2010
-
Ingår i: International Journal of Oral & Maxillofacial Implants. - 0882-2786 .- 1942-4434. ; 25:2, s. 321-328
-
Tidskriftsartikel (refereegranskat)abstract
- PURPOSE: To investigate the relationship between bone mineral density (BMD) before implant placement, implant stability measures at implant placement, and marginal bone loss of immediately loaded implants after 1 year in situ. MATERIALS AND METHODS: Consecutively recruited patients received Straumann SLActive implants loaded with fixed provisional prostheses within 24 hours. BMD was measured from computed tomographic images before implant placement. Alveolar bone quality was assessed during surgery. Implant stability-both rotational and as measured with resonance frequency analysis-and marginal bone height were assessed at implant placement and after 1 year. The Pearson correlation coefficient was used to calculate correlations, and significance was considered when P < .05. RESULTS: Twenty-one patients received 137 implants (87 in maxillae and 50 in mandibles). BMD was significantly correlated with bone quality classification in both arches (P < .001). Mean BMD was also significantly correlated with stability values (P < .001). Mean marginal bone loss at implant surfaces differed, but not significantly, at the 1-year follow-up, regardless of BMD values (P = .086) and measured stability (rotational stability P = .34, resonance frequency analysis P = .43) at implant placement. CONCLUSION: Within the limits of this study, it can be concluded that computed tomographic examination can be used as a preoperative method to assess jawbone density before implant placement, since density values correlate with prevailing methods of measuring implant stability. However, in the short time perspective of 1 year, there were no differences in survival rates or changes in marginal bone level between implants placed in bone tissue of different density.
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| 3. |
- Bergkvist, Göran, et al.
(författare)
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Immediately loaded implants supporting fixed prostheses in the edentulous maxilla : A preliminary clinical and radiologic report
- 2005
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Ingår i: International Journal of Oral & Maxillofacial Implants. - 0882-2786 .- 1942-4434. ; 20:3, s. 399-405
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Tidskriftsartikel (refereegranskat)abstract
- Purpose: To evaluate the survival rate of immediately loaded ITI sand-blasted, large-grit, acid-etched (SLA) solid-screw dental implants in the edentulous maxilla after 8 months of loading. Materials and Methods: Twenty-eight patients (mean age 63 years) with edentulous maxillae each received 6 implants and 1 implant-supported fixed provisional prosthesis within 24 hours after surgery. After a mean healing time of 15 weeks, the patient received a definitive, screw-retained, implant-supported fixed prosthesis. A total of 168 implants were placed. Clinical parameters were registered after 1 month of loading with the implant-supported fixed prostheses as well as 8 months after implant place ment. Radiologic examinations and assessments were made at implant placement and after 8 months. Results: The mean marginal bone level at implant placement was 1.6 mm (range 0 to 5.1, SD 1.1) apical of the reference point (the implant shoulder). The mean marginal bone level at the 8-month follow-up was 3.2 mm (range 0.4 to 5.9, SD 1.1) apical of the reference point. Three implants failed during the healing period. Discussion: The improved results in the present study might be a result of the positive effect of splinting the implants immediately after placement Conclusion: ITI SLA solid-screw implants immediately loaded (ie, loaded within 24 hours of placement) and supporting fixed prostheses had successful survival rates after 8 months. The present results constitute a solid base line for future follow-up studies.
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| 4. |
- Lindh, Christina, et al.
(författare)
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Efficacy of clinical methods to assess jawbone tissue prior to and during endosseous dental implant placement : a systematic literature review
- 2007
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Ingår i: International Journal of Oral & Maxillofacial Implants. - 0882-2786 .- 1942-4434. ; 22:2, s. 289-300
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Forskningsöversikt (övrigt vetenskapligt/konstnärligt)abstract
- PURPOSE: To evaluate the evidence for the diagnostic accuracy of clinical methods to assess bone density, quantity, or quality prior to and during dental implant placement. MATERIALS AND METHODS: A PubMed literature search with specific indexing terms and a hand search were made. From the retrieved titles and abstracts, 3 reviewers selected publications on the basis of predetermined inclusion and exclusion criteria. Data were extracted from the selected publications using a protocol. Original studies were interpreted with the aid of the Quality Assessment of Diagnostic Accuracy Studies (QUADAS) tool. RESULTS: The literature search yielded 145 titles and abstracts, of which 71 were selected and read in full text. Seven studies were judged relevant. In 1 study, no method was presented as the test method. In 6 studies, the results of the test method were compared to those of a reference method. However, only 1 study presented the results in terms of percentage of correct diagnoses. In that study, the use of periapical radiography together with reference images yielded correct assessment of the trabecular pattern of the mandible in 3 categories in 58% of the sites. The kappa index of interobserver agreement was 0.35 and intraobserver agreement was 0.67. Corresponding kappa values for 4 classes of bone quality presented by Lekholm and Zarb were 0.33 and 0.43, respectively. No study examined the accuracy of the method originally described by Lekholm and Zarb. CONCLUSION: The evidence for the efficacy of clinical methods to assess jawbone tissue prior to and during endosseous dental implant placement is sparse. This emphasizes the need for studies that incorporate accepted methodologic criteria for diagnostic efficacy. PMID: 17465355 [PubMed - indexed for MEDLINE]
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