Balcarek, Peter

[["dc.bibliographiccitation.firstpage","73"],["dc.bibliographiccitation.issue","4"],["dc.bibliographiccitation.journal","Strategies in Trauma and Limb Reconstruction"],["dc.bibliographiccitation.lastpage","79"],["dc.bibliographiccitation.volume","2009"],["dc.contributor.author","Konietschke, Frank"],["dc.contributor.author","Stürmer, Klaus Michael"],["dc.contributor.author","Schütze, Gunther"],["dc.contributor.author","Frosch, K.-H."],["dc.contributor.author","Schwallich, T."],["dc.contributor.author","Losch, A."],["dc.contributor.author","Walde, T."],["dc.contributor.author","Balcarek, P."],["dc.date.accessioned","2019-07-09T11:52:50Z"],["dc.date.available","2019-07-09T11:52:50Z"],["dc.date.issued","2009"],["dc.description.abstract","Ligament graft fixation with bioabsorbable interference screws is a standard procedure in cruciate ligament replacement. Previous screw designs may resorb incompletely, and can cause osteolysis and sterile cysts despite being implanted for several years. The aim of this study was to examine the in vivo degradation and biocompatibility of the new Milagro™ interference screw (Mitek, Norderstedt, Germany). The Milagro™ interference screw is made of 30% ß-TCP (TriCalcium phosphate) and 70% PLGA (Poly-lactic-co-glycolic acid). In the period between June 2005 and February 2006, 38 patients underwent graft fixation with Milagro™ screws in our hospital. Arthroscopic ACL reconstruction was performed using hamstring tendon grafts in all the patients. MR imaging was performed on 12 randomly selected patients out of the total of 38 at 3, 6 and 12 months after surgery. During the examination, the volume loss of the screw, tunnel enlargement, presence of osteolysis, fluid lines, edema and postoperative screw replacement by bone tissue were evaluated. There was no edema or signs of inflammation around the bone tunnels. At 3, 6 and 12 months, the tibial screws showed an average volume loss of 0, 8.1% (±7.9%) and 82.6% (±17.2%, P < 0.05), respectively. The femoral screws showed volume losses of 2.5% (±2.1%), 31.3% (±21.6%) and 92.02% (±6.3%, P < 0.05), respectively. The femoral tunnel enlargement was 47.4% (±43.8%) of the original bone tunnel volume after 12 months, and the mean tunnel volume of the tibial tunnel was −9.5% (±58.1%) compared to the original tunnel. Bone ingrowth was observed in all the patients. In conclusion, the resorption behaviour of the Milagro™ screw is closely linked to the graft healing process. The screws were rapidly resorbed after 6 months and, at 12 months, only the screw remnants were detectable. Moreover, the Milagro™ screw is biocompatible and osteoconductive, promoting bone ingrowth during resorption. Tunnel enlargement is not prevented in the first months but is reduced by bone ingrowth after 12 months."],["dc.identifier.doi","10.1007/s11751-009-0063-2"],["dc.identifier.fs","434403"],["dc.identifier.purl","https://resolver.sub.uni-goettingen.de/purl?gs-1/6036"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/60290"],["dc.language.iso","en"],["dc.notes.intern","Merged from goescholar"],["dc.relation.issn","1828-8936"],["dc.rights","Goescholar"],["dc.rights.uri","https://goescholar.uni-goettingen.de/licenses"],["dc.subject.ddc","610"],["dc.title","Magnetic resonance imaging analysis of the bioabsorbable Milagro interference screw for graft fixation in anterior cruciate ligament reconstruction."],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.version","published_version"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","2320"],["dc.bibliographiccitation.issue","11"],["dc.bibliographiccitation.journal","The American Journal of Sports Medicine"],["dc.bibliographiccitation.lastpage","2327"],["dc.bibliographiccitation.volume","38"],["dc.contributor.author","Balcarek, P."],["dc.contributor.author","Jung, K."],["dc.contributor.author","Ammon, J."],["dc.contributor.author","Walde, T. A."],["dc.contributor.author","Frosch, S."],["dc.contributor.author","Schuttrumpf, J. P."],["dc.contributor.author","Stürmer, K. M."],["dc.contributor.author","Frosch, K.-H."],["dc.date.accessioned","2019-07-09T11:52:57Z"],["dc.date.available","2019-07-09T11:52:57Z"],["dc.date.issued","2010"],["dc.description.abstract","Background: A trend toward young women being at greatest risk for primary and recurrent dislocation of the patella is evident in the current literature. However, a causative factor is missing, and differences in the anatomical risk factors between men and women are less defined. Purpose: To identify differences between the sexes in the anatomy of lateral patellar instability. Study Design: Case control study; Level of evidence, 3. Methods: Knee magnetic resonance images were collected from 100 patients treated for lateral patellar instability. Images were obtained from 157 patients without patellar instability who served as controls. Using 2-way analyses of variance, the influence of patellar dislocation, gender, and their interaction were analyzed with regard to sulcus angle, trochlear depth, trochlear asymmetry, patellar height, and the tibial tubercle–trochlear groove (TT-TG) distance. Mechanisms of injury of first-time dislocations were divided into high-risk, low-risk, and no-risk pivoting activities and direct hits. Results: For all response variables, a significant effect was observed for the incidence of patellar dislocation (all P\\.01). In addition, sulcus angle, trochlear asymmetry, and trochlear depth depended significantly on gender (all P\\.01) but patellar height did not (P 5 .13). A significant interaction between patellar dislocation and gender was observed for the TT-TG distance (P 5 .02). The mean difference in TT-TG distance between study and control groups was 4.1 mm for women (P\\.01) and 1.6 mm for men (P 5 .05). Low-risk and no-risk pivoting injuries were most common in women, whereas first-time dislocations in men occurred mostly during high-risk pivoting activities (P\\.01). Conclusion: The data from this study indicate that trochlear dysplasia and the TT-TG distance is more prominent in women who dislocate the patella. Both factors might contribute to an increased risk of lateral patellar instability in the female patient as illustrated by the fact that dislocations occurred most often during low-risk or no-risk pivoting activities in women."],["dc.identifier.doi","10.1177/0363546510373887"],["dc.identifier.fs","572930"],["dc.identifier.purl","https://resolver.sub.uni-goettingen.de/purl?gs-1/6247"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/60309"],["dc.language.iso","en"],["dc.notes.intern","Merged from goescholar"],["dc.rights","Goescholar"],["dc.rights.uri","https://goescholar.uni-goettingen.de/licenses"],["dc.subject.ddc","610"],["dc.title","Anatomy of Lateral Patellar Instability: Trochlear Dysplasia and Tibial Tubercle-Trochlear Groove Distance Is More Pronounced in Women Who Dislocate the Patella"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dspace.entity.type","Publication"]]