[Complication management following resection and reconstruction of the upper limbs and shoulder girdle]. / Komplikationsmanagement nach Tumorresektion und Defektrekonstruktion an der oberen Extremität und am Schultergürtel.

BACKGROUND: Sarcomas of the upper limbs commonly affect the proximal humerus or scapula. Complications after tumor resection and reconstruction are rare but cannot be neglected, particularly after tumor endoprosthetic reconstructions. MATERIALS AND METHODS: The most common complications after resection of sarcomas of the upper limbs and shoulder girdle are described, and current knowledge regarding complication management is presented. Additionally, a selective literature search was performed, incorporating personal experiences. RESULTS: Wound healing disorders and infections after tumor resection without specific reconstruction (clavicle resection, scapulectomy) usually respond well to conservative or surgical treatment. However, periprosthetic infections after reconstruction using a megaendoprosthesis constitute a severe and frequent complication, with an incidence of 5-10%. Two-stage implant replacement still represents the gold standard, although in selected cases, one-stage revision with retention of the prosthetic stem appears warranted. Secondary amputation as a result of periprosthetic infection is rare compared to the situation with infections of the lower limb. Mechanical complications necessitating surgical revision are mostly limited to joint dislocation after inverse total shoulder replacement (TSR). (Sub)luxation in anatomic TSR can be tolerated provided there is no tendency toward perforation of the skin in a asymptomatic patient. Biological reconstructions are most often indicated for reconstruction of intercalary defects of the humerus, and revision is necessitated most frequently by mechanical complications. Despite multiple surgical revisions, stable reconstructions and limb salvage can usually be achieved in the upper limb.

Autologous Bone Marrow Transplant in Multiple Myeloma Patient With Bone Marrow Hematopoietic Stem Cell.

Multiple myeloma (MM) is a malignancy with multiple complications such as recurrent bacterial infections, anemia, osteolytic lesions, bone marrow failure and decreased kidney function. In developed transplant center, the bone marrow transplant procedure is performed by the source of peripheral blood stem cells. Apheresis machine which is not always available in all Haematology and Oncology Centre in Indonesia, is required for harvesting stem cell from PBSC (peripheral blood stem cell). There are only a few reports on marrow-derived stem cells transplant from BM with a 24-hour storage in multiple myeloma cases. We report two cases with non-secretory myeloma stage III and IgG myeloma stage II (International Staging System). Both patients were treated with induction regimens CyBord until a complete remission. Once remission was achieved, an autologous bone marrow transplant procedures were performed. The source of haematopietic stem cells (HSCs) were harvested from bone marrow and stored for 24 hours at a temperature of 4◦ C. The complications were neutropenia, anemia, thrombocytopenia, mucositis, diarrhea, hair loss, and skin darkness. The HSCs grew well on day 12 and 23. After treatment in the isolation room, the patient's condition improved and the patients were discharged.

[Biological downsizing : Acetabular defect reconstruction in revision total hip arthroplasty]. / Biologisches Downsizing : Azetabuläre Knochendefekte in der Hüftrevisionsendoprothetik.

BACKGROUND: Periacetabular bony defects remain a great challenge in revision total hip arthroplasty. After assessment and classification of the defect and selection of a suitable implant the primary stable fixation and sufficient biological reconstitution of a sustainable bone stock are essential for long term success in acetabular revision surgery. Biological defect reconstruction aims for the down-sizing of periacetabular defects for later revision surgeries. TECHNIQUE: In the field of biological augmentation several methods are currently available. Autologous transplants feature a profound osseointegrative capacity. However, limitations such as volume restrictions and secondary complications at the donor site have to be considered. Structural allografts show little weight bearing potential in the long term and high failure rates. In clinical practice, the usage of spongious chips implanted via impaction bone grafting technique in combination with antiprotrusio cages for the management of contained defects have shown promising long time results. Nevertheless, when dealing with craniolateral acetabular and dorsal column defects, the additional implantation of macroporous metal implants or augments should be considered since biological augmentation has shown little clinical success in these particular cases. PROSPECT: This article provides an overview of the current clinically available biological augmentation methods of peri-acetabular defects. Due to the limitations of autologous and allogeneic bone transplants in terms of size and availability, the emerging field of innovative implantable tissue engineering constructs gains interest and will also be discussed in this article.

Retrospective Evaluation of Implants Placed in Iliac Crest Autografts and Pristine Bone.

OBJECTIVE: Iliac crest autografts can compensate for severe mandibular atrophy before implant placement. However, the implant success in the augmented bone is not entirely predictable. Here we performed a retrospective cohort study to determine the success and related parameters of implants placed in augmented bone and pristine bone for up to 11 years. MATERIAL AND METHODS: We analyzed 18 patients where 72 implants were placed six months after iliac crest transplantation and 19 patients where 76 implants were placed in pristine bone. The primary endpoint was implant loss. Secondary endpoints were the implant success, peri-implant bone loss, and the clinical parameters related to peri-implantitis. Moreover, we evaluated the oral-health-related quality of life (OHIP). RESULTS: Within a mean follow-up of 5.8 ± 2.2 and 7.6 ± 2.8 years, six but no implants were lost when placed in augmented and pristine bone, respectively. Among those implants remaining in situ, 58% and 68% were rated as implant success (p = 0.09). A total of 11% and 16% of the implants placed in the augmented and the pristine bone were identified as peri-implantitis (p = 0.08). Bone loss was similar in both groups, with a mean of 2.95 ± 1.72 mm and 2.44 ± 0.76 mm. The mean OHIP scores were 16.36 ± 13.76 and 8.78 ± 7.21 in the augmentation and the control group, respectively (p = 0.35). CONCLUSIONS: Implants placed in iliac crest autografts have a higher risk for implant loss and lower implant success rates compared to those placed in the pristine bone.

[Ulnar collateral ligament reconstruction of the elbow in posttraumatic and chronic ligament instability]. / Rekonstruktion des medialen Bandapparats am Ellenbogen bei posttraumatischen und chronischen Bandinstabilitäten.

OBJECTIVE: Restoration of ulnar elbow stability in cases of posttraumatic and chronic ulnar ligament instability. INDICATIONS: Symptomatic therapy-resistant ulnar ligament instability of the elbow. CONTRAINDICATIONS: Arthrofibrosis and high-grade elbow arthrosis. SURGICAL TECHNIQUE: Anatomical reconstruction of the ulnar collateral ligament (UCL) with autologous tendon graft (tendons of the palmaris longus muscle and gracilis muscle) in implant-free docking technique. POSTOPERATIVE MANAGEMENT: A cast for 1 week, then 5 weeks orthesis with limitation of complete extension and flexion; full weight bearing after 3 months. RESULTS: After 2 years 90% of the patients are able to return at an equal level of activity. The overall complication rate is 10.4%. The most common complication is ulnar nerve neurapraxia in 7.8% of the patients.

Developments in the Field of Myeloma in the Last Decade.

The plasma cell disorders constitute a heterogeneous group of diseases. Accumulation of knowledge in the field has helped us to understand these diseases better, stage them more precisely, prognosticate more accurately and manage them more effectively. The paradigm shift in the management of multiple myeloma over the last one-and-a-half decades shows no signs of slackening. In addition to novel therapies, better supportive care and high-dose melphalan with autologous hematopoietic stem cells have contributed to this positive outcome. This review summarizes the developments in this sphere in the recent past.

Comparison of the effect of three autogenous bone harvesting methods on cell viability in rabbits.

Background. This study was designed to compare the viability of autogenous bone grafts, harvested using different methods, in order to determine the best harvesting technique with respect to more viable cells. Methods. In this animal experimental study, three harvesting methods, including manual instrument (chisel), rotary device and piezosurgery, were used for harvesting bone grafts from the lateral body of the mandible on the left and right sides of 10 rabbits. In each group, 20 bone samples were collected and their viability was assessed using MTS kit. Statistical analyses, including ANOVA and post hoc Tukey tests, were used for evaluating significant differences between the groups. Results. One-way ANOVA showed significant differences between all the groups (P=0.000). Data analysis using post hoc Tukey tests indicated that manual instrument and piezosurgery had no significant differences with regard to cell viability (P=0.749) and the cell viability in both groups was higher than that with the use of a rotary instrument (P=0.000). Conclusion. Autogenous bone grafts harvested with a manual instrument and piezosurgery had more viable cells in comparison to the bone chips harvested with a rotary device.

[Open-wedge osteotomy of the glenoid for treatment of posterior shoulder instability with increased glenoid retroversion]. / Open-wedge-Glenoidosteotomie als Therapie bei posteriorer Schulterinstabilität aufgrund vermehrter Glenoidretroversion.

OBJECTIVE: Treatment of posterior shoulder instability with increased retroversion of the glenoid using open-wedge osteotomy of the glenoid neck stabilized with an autologous bone block. INDICATIONS: Symptomatic, atraumatic posterior shoulder instability with increased retroversion (>20°) of the glenoid and previously failed conservative or surgical treatment. CONTRAINDICATIONS: General contraindications against surgery. Relative contraindications: osteoporosis, nicotine abuse, or suspected patient noncompliance. SURGICAL TECHNIQUE: Posterior approach with a 7 cm long incision starting medial of the posterolateral corner of the acromion heading to the posterior axillary fold and subsequent preparation of the deltoid muscle and the infraspinatus muscle. The posterior glenohumeral capsule is incised by performing a capsular T­shift. The osteotomy is performed intracapsulary medial to the genoid rim. The wedge bone graft, harvested from spina scapulae or iliac spine, is placed "press fit" in position. Additional fixation of the graft is not necessary if the anterior cortex is intact. For reinforcing the posterior capsule, a posterior capsule shift should be performed. Insertion of extracapsular wound drainage. Successive wound closure. POSTOPERATIVE MANAGEMENT: Postoperative immobilization in a 0° shoulder orthesis for 6 weeks; avoidance of horizontal abduction for 8 weeks. After removing the wound drainage, start of limited active-assisted range of motion. Over-head sports after 6 months. RESULTS: From 2009-2015, 6 posterior open wedge glenoid osteotomies were performed. Postoperative retroversion of the glenoid was 11.2 ± 9.4° compared to 26.0 ± 8.6° before surgery. Of 6 shoulders, 2 showed postoperative signs of persistent posterior instability; the other 4 shoulders were free of complaints. No revision surgery was needed.

The Thermogenic Circuit: Regulators of Thermogenic Competency and Differentiation.

In mammals, a thermogenic mechanism exists that increases heat production and consumes energy. Recent work has shed light on the cellular and physiological mechanisms that control this thermogenic circuit. Thermogenically active adipocytes, namely brown and closely related beige adipocytes, differentiate from progenitor cells that commit to the thermogenic lineage but can arise from different cellular origins. Thermogenic differentiation shares some features with general adipogenesis, highlighting the critical role that common transcription factors may play in progenitors with divergent fates. However, thermogenic differentiation is also discrete from the common adipogenic program and, excitingly, cells with distinct origins possess thermogenic competency that allows them to differentiate into thermogenically active mature adipocytes. An understanding of this thermogenic differentiation program and the factors that can activate it has led to the development of assays that are able to measure thermogenic activity both indirectly and directly. By combining these assays with appropriate cell models, novel therapeutic approaches to combat obesity and its related metabolic disorders by enhancing the thermogenic circuit can be developed.

Uma estratégia clínica para reabilitar a maxila atrófica com enxertos ósseos da calvária, implantes dentários temporários e definitivos: acompanhamento clínico de cinco anos / A clinical strategy to rehabilitate the atrophic maxilla with calvarial bone grafts, temporary and defi nitive implants: a 5-year follow-up report

O objetivo deste caso clínico foi relatar o tratamento de uma discrepância maxilomandibular de 5 mm através de enxertos da calota craniana para futura colocação de implantes dentários. Uma paciente de 65 anos de idade queixava-se da dificuldade de mastigar e do suporte labial inadequado com sua prótese total superior. Após a anamnese, exames intra e extraoral e por imagem, oito blocos ósseos foram removidos da calota craniana e fixados na região vestibular do rebordo alveolar. Depois, seis implantes (3,5-4,5 mm x 8-11 mm) foram colocados na maxila, porém, com a prótese provisória ficando suportada apenas por dois implantes provisórios (2,5 x 18 mm) para aguardar o tempo de consolidação do enxerto e dos implantes definitivos. Após cinco anos de acompanhamento, esta estratégia clínica se mostrou efetiva na estabilidade da correção do suporte labial e da discrepância maxilomandibular...

The aim of this clinical case was to report the treatment of a 5 mm maxillomandibular discrepancy using calvarial bone grafts for further dental implant placement. A 65-years-old patient had claims of poor mastication and inadequate lip support with her complete denture. After clinical and tomographic exams, 8 bone blocks were harvested from the calvarium region and secured at the buccal aspect of the alveolar maxillary ridge. After, six implants (3.5-4.5 mm x 8-11 mm) were installed; however, the provisional prosthesis was supported only by two provisional implants (2.5 x 18 mm) allowing for proper graft consolidation and implant osseointegration. After fi ve years of follow-up, this clinical strategy proved to be efficient to stabilize the lip support and the maxillomandibular discrepancy...

Uso do PRP com enxertos autógeno e de banco de tecido ósseo para levantamento do seio maxilar em um modelo em cães: desenho tipo split-mouth com resultados microscópico / The use of PRP with autogenous and tissue bone bank grafting for sinus lift procedures in the dog model: split-mouth design with microscopic results

Objetivo: avaliar microscopicamente a contribuição do plasma rico em plaquetas (PRP) no processo de reparo do enxerto ósseo de banco de ossos humanos e de osso autógeno em seios maxilares de cães. Material e métodos: quatro cães da raça Beagle, com dois anos de idade e aproximadamente 10 kg, foram submetidos a cirurgias de levantamento de seio maxilar utilizando-se enxerto ósseo autógeno (lado direito) como grupo-controle e enxerto de banco de ossos humanos (lado esquerdo) associados ao PRP em dois cães, e sem nos outros. As amostras para análise foram removidas com broca trefina no período de 60 dias pós-enxertia. Resultados: o enxerto autógeno mostrou processo de reparo em desenvolvimento; quando associado ao PRP apresentou organização lamelar e presença de medula óssea. No enxerto alógeno foram observadas fibrilas colágenas desorganizadas com grande quantidade de osteócitos; quando associado ao PRP, notou-se ausência de infiltrado inflamatório e processo de reparo em fase final. Conclusão: 1) através da análise histológica, o processo de ossificação do enxerto autógeno associado ao PRP foi superior; 2) a associação do PRP ao enxerto de banco de ossos humanos demonstrou reparo ósseo superior, quando comparado ao enxerto autógeno utilizado isoladamente.

Objectives: to microscopically evaluate the contribution of Platelet Rich Plasma (PRP) in the process of repairing bone human bones graft stock and autogenous bone in maxillary sinus of dogs. Material and methods: four Beagle dogs, aged 2 years old and about 10 pounds underwent maxillary sinus surgery using autogenous bone graft (right) as a control group and grafting of human bone bank (hand left) associated with the PRP in two dogs, and no other. Samples for analysis were removed with trephine drill within 60 days after grafting. Results: the autograft showed the repair process in development, when combined with PRP showed lamellar organization and the presence of bone marrow. In the allograft was observed disorganized collagen fibrils with loads of osteocytes, and when combined with PRP, it was noted the absence of inflammatory infiltrate, and repair process in the final stage. Conclusion: 1) by histological analysis, the process of ossification of the autogenous PRP was associated with higher; 2) association of PRP to the graft database of human bones showed higher bone healing compared to autograft used alone.