| 76701. |
- Kahnberg, Karl-Erik, 1941, et al.
(författare)
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Local Sinus Lift for Single-Tooth Implant. I. Clinical and Radiographic Follow-Up.
- 2011
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Ingår i: Clinical implant dentistry and related research. - : Wiley. - 1708-8208 .- 1523-0899. ; 13:3, s. 231-137
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Tidskriftsartikel (refereegranskat)abstract
- ABSTRACT Background: For single-tooth implant replacement in the posterior maxilla, it is often necessary to do an augmentation of the alveolar process because of post-extraction resorption and include part of the maxillary sinus. Purpose: The purpose of this study is to present a technique for a local sinus lift with autogenous bone in a one-stage procedure. Additionally, volume changes of the grafted area were evaluated radiographically up to 2 years. Materials and Methods: Twenty patients, 12 female and 8 males, were included in the study. Single-tooth replacement was made in the second premolar area in 7 cases and in the molar area in 13 cases. Local sinus lift and implant installation were made simultaneously. Abutment connection was made after 6 months of healing. Results: Two years of clinical and radiographic follow-ups have been made in all patients. The survival rate was 100%. The residual bone volume in the actual area was 2-5 mm preoperatively, after sinus lifting in mean 13 mm, after 1 year in mean 11.4 mm, and 2 years postoperatively in mean 10.6 mm. Conclusions: Local sinus lift with simultaneous bone augmentation and single-tooth replacement in the posterior maxilla is a predictable method although a certain bone volume reduction around the implant was evident at the 2-year follow-up.
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| 76702. |
- Kahnberg, Karl-Erik, 1941, et al.
(författare)
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Maxillary osteotomy with an interpositional bone graft and implants for reconstruction of the severely resorbed maxilla: a clinical report.
- 2005
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Ingår i: The International journal of oral & maxillofacial implants. - 0882-2786. ; 20:6, s. 938-45
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Tidskriftsartikel (refereegranskat)abstract
- PURPOSE: The aim of this study was to report the outcome of using a maxillary osteotomy with an interpositional bone graft and implants in the treatment of extremely resorbed maxillae. MATERIALS AND METHODS: Twenty-two consecutive patients (mean age 65.7 years) were included in the study. Bone grafts from the iliac bone were used. The patients were followed in a standardized clinical and radiographic method for up to 5 years. RESULTS: A total of 176 Astra Tioblast ST implants were placed. Six implant losses occurred. All patients had fixed prostheses. Only minor bone resorption (1.0 to 1.5 mm) occurred in the bone graft, as well as a certain amount of marginal bone remodeling around the implants (1.0 to 1.9 mm) during periods up to 5 years. Remodeling and resorption in the bone graft and around the implants occurred during the first postoperative year. The results represent cumulative success and survival rates of 97%, which is comparative to implant integration in conventional maxillary bone. DISCUSSION AND CONCLUSIONS: The orthognathic surgical technique using maxillary osteotomy with interpositional bone graft and implants in a 2-stage procedure has been shown to be a predictable and reliable method for rehabilitation of patients with extreme resorption of the maxilla when conventional implant surgical methods cannot be used. Although the procedures are trying for the patients, overall satisfaction with the end result can be rewarding.
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| 76703. |
- Kahnberg, Karl-Erik, 1941, et al.
(författare)
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Sagittal split advancement osteotomy: Comparison of the tendency to relapse after two different methods of rigid fixation.
- 2007
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Ingår i: Scandinavian journal of plastic and reconstructive surgery and hand surgery / Nordisk plastikkirurgisk forening [and] Nordisk klubb for handkirurgi. - : Informa UK Limited. - 0284-4311. ; 41:4, s. 167-72
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Tidskriftsartikel (refereegranskat)abstract
- Mandibular advancement was studied in 32 patients with mandibular retrognathia in whom the only intervention was in the mandible. Fifteen patients were treated with fixation by lag screws and 17 with monocortical miniplates. Lateral radiographs were taken preoperatively, postoperatively, 2 months postoperatively, and 1.5 years postoperatively, and mandibular movement analysed. All patients healed uneventfully. Cephalometric analysis of lateral radiographs showed no significant differences between the two groups in skeletal relapse during any of the control periods up to 18 months. Mandibular advancement for treatment of mandibular retrognathia using rigid fixation with either lag screws or miniplates was reproducable with only minor skeletal relapse.
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| 76704. |
- Kahnberg, Karl-Erik, 1941, et al.
(författare)
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Sinus Lift Procedure Using a 2-Stage Surgical Technique: I. Clinical and Radiographic Report up to 5 Years
- 2008
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Ingår i: The International Journal of Oral & Maxillofacial Implants. - 0882-2786. ; 28:5, s. 876-884
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Tidskriftsartikel (refereegranskat)abstract
- Purpose: The aim of this study was to report the long-term results of a 2-stage sinus lift procedure with autologous bone graft and Astra Tech Tioblast ST implants (Astra Tech, Mölndal, Sweden). Materials and Methods: Sinus lift procedures were carried out in 36 patients, 25 unilateral and 11 bilateral. Bone grafts were obtained from the iliac crest, mandibular angle, or chin region. Healing time for bone grafts varied between 4 and 5 months. Implants were allowed to heal for 6 months. The patients were followed in a standardized clinical and radiographic method for up to 5 years. Patients with partial dentition in the maxilla and limited bone volume below the sinus cavity (6 to 7 mm) were consecutively included in the study. Smoking was a contraindication to inclusion in the study unless patients who smoked quit smoking for at least 6 months prior to surgery. Results: All patients have been successfully restored with fixed complete dentures. There was no implant loss. Radiographic examination showed minor changes in bone graft height (1 to 1.5 mm) over 5 years and moderate bone remodeling (1 to 2 mm over 5 years). Signs of sinus infection appeared in 8 patients. In 4 patients, partial loss of bone graft material occurred. Conclusion: Two-stage sinus lift procedure with autologous bone graft material in combination with Astra Tech Tioblast ST implants has a predictable outcome. The method is reliable and useful for patients with severe resorption of the posterior maxilla.
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| 76705. |
- Kahnberg, Karl-Erik, 1941, et al.
(författare)
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Sinus lifting procedure. I. One-stage surgery with bone transplant and implants.
- 2001
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Ingår i: Clinical oral implants research. - 0905-7161. ; 12:5, s. 479-87
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Tidskriftsartikel (refereegranskat)abstract
- A prospective study of one-stage surgery with intrasinus bone transplant and implants has been performed in 26 patients (13 males and 13 females). The aim of the study was to evaluate the success rate with the one-stage sinus lifting procedure in patients with a need for bony augmentation of the alveolar process. Fifteen patients were partially dentate and 11 edentulous. The mean height of the alveolar ridge was 2.5 mm preoperatively (range 1-5.5 mm). 126 fixtures were inserted, 93 in grafted bone and 33 in alveolar bone. Twenty-two patients have been followed for three years, 21 for four years and 11 for five years. The clinical overall survival rate was 69.6% although only 61.2% in grafted bone. Ten of the patients had varying degree of sinusitis post-fixture installation. At the end of the study, 23 patients had permanent bridges. The survival rate was low for inlay supported implants when the one-stage surgical technique was applied. Two-stage surgery may be a safer method.
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| 76706. |
- Kahnberg, Karl-Erik, 1941, et al.
(författare)
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The approach to dentofacial skeletal deformities using a multisegmentation technique.
- 2007
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Ingår i: Clinics in plastic surgery. - : Elsevier BV. - 1558-0504 .- 0094-1298. ; 34:3, s. 477-84
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Tidskriftsartikel (refereegranskat)abstract
- This article describes the authors' approach to correcting dentofacial skeletal deformities requiring multisegmentation of the maxilla. Achieving optimal results requires a close collaboration within the orthodontic-surgical team. The importance of attention to detail in the course of the surgical procedure cannot be overemphasized, because complications of avascular necrosis cannot be corrected easily. The multisegmental maxilla is a valuable technique and adds to the versatility of the LeFort I in the treatment of open bite and transverse discrepancies in dentoalveolar deformities.
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| 76707. |
- Kahnberg, Karl-Erik, 1941
(författare)
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Transverse expansion of the maxilla using a multisegmentation technique.
- 2007
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Ingår i: Scandinavian journal of plastic and reconstructive surgery and hand surgery / Nordisk plastikkirurgisk forening [and] Nordisk klubb for handkirurgi. - : Informa UK Limited. - 0284-4311. ; 41:3, s. 103-8
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Tidskriftsartikel (refereegranskat)abstract
- In a long-term prospective study multisegmentation for transverse widening of the maxilla was followed up to calculate tendency to relapse and clinical outcome. Thirty-six patients were followed up for 30 months and 13 for 60 months postoperatively. There were no complications after the maxillary operations. Transverse widening varied from 2 mm to 1.5 cm in the posterior part of the maxilla, and was posterior to the canine teeth by a multisegmentation technique in the palatal bone. Although there was a tendency to relapse, which varied from 0.3-0.8 mm in the series, the clinical results are highly satisfactory.
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| 76708. |
- Kahrs, C. R., et al.
(författare)
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Enterovirus as trigger of coeliac disease: nested case-control study within prospective birth cohort
- 2019
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Ingår i: Bmj-British Medical Journal. - : BMJ. - 1756-1833. ; 364
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Tidskriftsartikel (refereegranskat)abstract
- OBJECTIVE To determine whether infection with human enterovirus or adenovirus, both common intestinal viruses, predicts development of coeliac disease. Case-control study nested within Norwegian birth cohort recruited between 2001 and 2007 and followed to September 2016. Children carrying the HLA genotype DR4-DQ8/DR3-DQ2 conferring increased risk of coeliac disease. Enterovirus and adenovirus detected using real time polymerase chain reaction in monthly stool samples from age 3 to 36 months. Coeliac disease diagnosed according to standard criteria. Coeliac disease antibodies were tested in blood samples taken at age 3, 6, 9, and 12 months and then annually. Adjusted odds ratios from mixed effects logistic regression model were used to assess the relation between viral infections before development of coeliac disease antibodies and coeliac disease. Among 220 children, and after a mean of 9.9 (SD 1.6) years, 25 children were diagnosed as having coeliac disease after screening and were matched to two controls each. Enterovirus was found in 370 (17%) of 2135 samples and was significantly more frequent in samples collected before development of coeliac disease antibodies in cases than in controls (adjusted odds ratio 1.49, 95% confidence interval 1.07 to 2.06; P=0.02). The association was restricted to infections after introduction of gluten. High quantity samples (>100 000 copies/mu L) (adjusted odds ratio 2.11, 1.24 to 3.60; P=0.01) and long lasting infections (>2 months) (2.16, 1.16 to 4.04; P=0.02) gave higher risk estimates. Both the commonly detected enterovirus species Enterovirus A and Enterovirus B were significantly associated with coeliac disease. The association was not found for infections during or after development of coeliac disease antibodies. Adenovirus was not associated with coeliac disease. In this longitudinal study, a higher frequency of enterovirus, but not adenovirus, during early childhood was associated with later coeliac disease. The finding adds new information on the role of viral infections in the aetiology of coeliac disease.
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| 76709. |
- Kahsay, G. A., et al.
(författare)
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Leader turnover and forest management outcomes: Micro-level evidence from Ethiopia
- 2020
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Ingår i: World Development. - : Elsevier BV. - 0305-750X. ; 127
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Tidskriftsartikel (refereegranskat)abstract
- The presence of persistent elite capture has been suggested as a reason for the mixed livelihood outcomes of participatory forest management. Leadership selection may overcome this. While there is a growing evidence that leaders are important for economic performance both at macro and micro (e.g., firms, villages, forest user groups) levels, few recent studies looked into a logical extension of this: leader turnover matters for economic growth, social welfare and political liberalization. We present new micro-level evidence linking leader turnover to forest management outcomes. Using data on forest user groups in rural Ethiopia, we find that leader turnover is positively correlated with forest management outcomes. Additional analysis suggests that the nature of this relation is causal: groups with higher leader turnover maintained higher forest stock, benefit more from the forest and have fairer distribution of these benefits. A closer look at forest governance reveals that groups with higher leader turnover elect leaders who are educated and perform better as well as held frequent group meetings. © 2019 Elsevier Ltd
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| 76710. |
- Kaidi, Donia, et al.
(författare)
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Impact of thymidine phosphorylase and CD163 expression on prognosis in stage II colorectal cancer
- 2022
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Ingår i: Clinical & Translational Oncology. - : Springer Science and Business Media LLC. - 1699-048X .- 1699-3055. ; 24:9
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Tidskriftsartikel (refereegranskat)abstract
- Background Tumor-associated macrophages (TAM) are known to facilitate colorectal cancer (CRC) growth. High macrophage infiltration in thymidine phosphorylase (TYMP) expressing CRC may correspond to poor prognosis. The prognostic impact of the expression CD163, a receptor associated with TAM, and TYMP in stroma, respectively, tumor tissue is not yet established. The aim of this study was to identify the potential associations between TYMP and CD163 expression levels and relapse-free survival (RFS) of patients with stage II CRC, and if microdissection is of importance. Methods Stage II CRC patients, radically resected with relapse (n = 104), were matched to patients with a 5-year relapse-free follow-up (n = 206). Gene expression of TYMP and CD163 was analyzed in snap-frozen tumor tissues and in microdissected formalin-fixed tumor tissues separated into tumor epithelium and stroma. Results TYMP expression was high in poorly differentiated tumors, right-sided CRC, and tumors with high microsatellite instability CD163-expressing macrophages near tumor epithelial cells had high expression in poorly differentiated and T4 tumors. High TYMP expression in tumor epithelial cells was in the multivariate analyses associated with shorter relapse-free survival (hazard ratio 1.66; 95% confidence interval: 1.09-2.56; p < 0.05). Conclusions TYMP expression in tumor epithelial cells was associated with RFS and emphasizes the need for tissue microdissection. Additional studies are needed to establish whether TYMP and CD163 could add clinically relevant information to identify high-risk stage II patients that could benefit from adjuvant chemotherapy.
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