Indonesia Conference Directory

Corresponding Author
Rio Aditya

Institutions
UNPAD

Abstract
Introduction In meniscal extrusion (ME), the meniscus cannot play its biomechanical role in load distribution and force absorption by dispersing tibiofemoral axial load. Significant ME will increase contact forces that contribute to the advancement of knee osteoarthritis. Arthroscopic direct meniscal extrusion reduction (ADMER) to reduce persistent ME in posterior root medial meniscus (PRMM) repair has been recommended and showed a promising outcome.The aim of this study was to compare the biomechanical properties of conventional PRMM repair with PRMM repair + ADMER technique. Materials & Methods A total of eighteen (18) porcine tibia with attached intact medial meniscus were used and the specimens were randomly assigned to 1 of 3 groups (n = 6 each). The groups included: Control group (C) with healthy medial meniscus, conventional PRMM repair (P) group, and PRMM repair with ADMER technique (AD) group. All specimens underwent testing for static pull-out strength with a servo-hydraulic material testing machine. A maximum pullout-load was applied to the PMMR until failure. Means and standard deviations of pullout strength were compared Results Mean pull-out strength was 1047.19 N (±64.4) for C group, 256.41 N (±54.26) for P group and 367.48 N (±40.5) for AD group. (Table 1) Maximum pull-out strength for PRMM + ADMER was significantly higher compared to P group (p-value 0.006). Conclusion PRMM Repair combined with ADMER technique had biomechanical properties of higher superior pullout strength compared to conventional PRMM repair and lower elastic modulus. However, we did not test its biomechanical properties under cyclic loading and both techniques did not reach the strength of the native healthy medial meniscus.

Keywords
biomechanical study, meniscus repair, meniscus root, meniscus tear

Topic
Orthopaedic Bioengineering

Link: https://ifory.id/abstract/r7KaqvbJpgmV

Corresponding Author
Yoan Putrasos Arif

Institutions
Orthopaedics and Traumatology Department
Hasan Sadikin Hospital
Faculty of Medicine
Universitas Padjadjaran

Abstract
Background Fractures are among the most frequent type of injuries in patients exposed to traumatic injury. There is increasing evidence that exposure to electromagnetic radiation can affect human health. Electromagnetic radiation stimulation is known to affect biological activity on related to fracture healing. Low-frequency electromagnetic radiation exposure has been utilized widely for supporting therapy to enhance fracture healing. This study aimed to evaluate the effects of exposure to electromagnetic radiation at a frequency of 2600 MHz (the frequency of fourth-generation cellular phones) on the healing of femur fractures in rats treated with ORIF K-wire. Methods. The study was carried out with 22 mature male Wistar rats. Femur osteotomy and fixation with open intramedullary wire were performed on all rats. The rats were preoperatively divided into two groups using simple random sampling, –a control group and an experimental group. Only the experimental group was exposed to electromagnetic radiation at a frequency of 2600 MHz for 30 minutes daily, five days per week for 2 weeks. Histopathological tests were conducted 2 weeks after the operation. Result. The Mann Whitney test score showed fracture healing was statistically significantly higher in the experimental group than in the control group (p<0.05, 3.55±0.69- and 5.91±0.83, respectively). Discussions. The thermal and non-thermal effects of electromagnetic radiation exposure have been shown to promote the proliferation phase of fracture healing due to radiation hormesis. Conclusions. High-frequency electromagnetic radiation exposure at 2600 MHz enhances the proliferation phase of the femur fracture healing process.

Keywords
Electromagnetic radiation, 4th generation cellular phone frequency, ORIF K-wire, proliferation phase

Topic
Orthopaedic Bioengineering

Link: https://ifory.id/abstract/cgXzHK6peCBV

Corresponding Author
Maria Jessica Chorman

Institutions
Faculty of Medicine Padjadjaran University (a)
Dr. Hasan Sadikin Central General Hospital (b)

Abstract
The aim of study is to determine the prevalence of sarcopenia in ambulatory, eldery with cognitive impairment in elderly nursing home residents. 33 community-dwelling elderly aged 62-89 were participated. The Asian Working Group for Sarcopenia (AWGS) criteria were used to define sarcopenia based on muscle mass, grip strength and muscle performance. The study population is consisted of women (93,9%), Chinese descendant (51,5%), mean age = 77,2 ± SD7.70 years, living in elderly community dwelling. Their BMI was 21,3 ±SD 5,1 Their mean muscle mass was 33,25 ± SD 4,48 kg/m2; mean gait speed was 1.0 ± SD 0.2 m/s, mean grip strength was 25.5 ± SD 8.1 kg. Overall, 39,3% of elderly in this study had sarcopenia. Age and BMI were significantly associated with sarcopenia whereas with underweigth BMI has a stronger relationship with the prevalence of sarcopenia compared with normal BMI. Cognitive impairment is greater in elderly who had sarcopenia than non-sarcopenia elderly. Gender, ethnicity, education were not significantly associated with sarcopenia. Using AWGS criteria to define sarcopenia, we found that 23,1% of older patients with mild cognitive impairment and 15,4% of older patients with moderate cognitive impairment. Keywords: elderly, nursing home, sarcopenia, cognitive impairment

Keywords
elderly, nursing home, sarcopenia, cognitive impairment

Topic
Orthopaedic Bioengineering

Link: https://ifory.id/abstract/Uf4JPX6xCNWn

Corresponding Author
Tommy Mandagi

Institutions
(1) Orthopedics and Traumatology Surgeon
(2) Research Assistant Medical Doctor
Department of Orthopedics and Traumatology
Siloam Hospitals Lippo Village - Pelita Harapan University

Abstract
INTRODUCTION The tibial cut referenced to the center of the intercondylar eminence (IE) in total knee arthroplasty (TKA) often leads to malalignment of the knee due to preexisting tibial deformities, is liable to polyethylene (PE) wear subsequently causing implant loosening and malalignment, which has been a common cause of knee arthroplasty revisions. Our case showed that careful preoperative planning gives good component placement and better correction of the mechanical axis of the leg, therefore increases the survivorship of the TKA. CASE PRESENTATION A 62 years old male present with bilateral knee pain (right>left), worsened by walking and squatting. Plain radiograph showed advanced knee Osteoarthritis (OA) (right>left) with significant -S-shaped- tibia valgus angle of 5.11° and 4.37° respectively. METHOD The patient had preoperative full-length (long film) standing bilateral lower limb radiographs with the patella facing forward. To measure the Tibial bowing angle and tibial reference point we use a modified method described by Thippana et al, using PACS software. From the preoperative radiographs, shifting to the medial of center intercondylar reference point of the proximal tibia was determined. The distance between the center of the intercondylar eminence and the medial condyle reference point was calculated. The same reference point was replicated intraoperatively. Post-operatively, the same radiographs were obtained at 4-weeks follow-up, medial proximal tibial component angle (MPTA) and hip knee ankle (HKA) angle were assessed. RESULTS Postoperative radiograph showing MPTA/HKA; 88.62°/180.75° of the right knee (A) and 89.69°/182.89° of the left knee (B) with the use of the medial tibial condylar reference point in a patient with tibia valgus. Both nearly achieving the optimal MPTA of 90° + 3° and HKA of 180° + 3° DISCUSSION Distributing load between tibial plateau could increase the PE survival rate and maintain the desired knee alignment in TKA, which could be achieved by preoperative measurements. Studies showed that >5° malalignment increased implant thickness loss by 0.11 mm per year in the concavity of the deformation, which increase chance of malalignment and the needs of TKA revisions. We recommend that the degree of reference point shift should be individualized based on the deformity on preoperative full-length radiographs. CONCLUSION Preoperative measurement of tibial bowing angle and tibial reference point using modified Thippana method is necessary to achieved the desired reference point for extramedullary tibial cutting jig in knees with significant tibia valgus.

Keywords
TIBIA VALGA, TOTAL KNEE ARTHROPLASTY, LOWER LIMB MORPHOLOGY, KNEE ALIGNMENT, CASE REPORT

Topic
Orthopaedic Bioengineering

Link: https://ifory.id/abstract/jkQVbD8w7UfJ

Corresponding Author
Mahyudin .

Institutions
Orthopaedi and Traumatology Hasan Sadikin Hospital Padjadjaran University

Abstract
Femoral fracture is trauma with high mortality rate. Incidence of femoral fractures in America is approximately 13 cases per 100,000 people per year. In Indonesia, it is reported that the incidence of fractures every year is 11.10 cases per 1,000 people per year, with an incidence of 11.67 cases per 1,000 people per year in men and 10.65 cases per 1,000 people per year in women. Long bone fracture cases frequently related to missing bone segments, that can disrupted the bone healing. Incidence of long bone fracture with defect reported about 13,9%. The process of defect fracture healing requires internal and external mechanical stimulation, external stimulation can be stimulated using low-intensity pulsed ultrasounds. The positive effects of ultrasound therapy (LIPUS) on accelerating bone healing have been demonstrated in several studies. Clinical studies have shown a significant positive effect from LIPUS in the treatment of non-union fractures and accelerated fracture repair compared to fractures treated with placebo of 38%. The purpose of this study was to determine the effectiveness of LIPUS on healing of defect femoral fractures in rabbit post ORIF plate and screw based on radiological measurements. This study is a comparative, unpaired laboratory experimental study with two treatment groups and one control group. Treatment group consist of group I that was given LIPUS 30 mW/cm2 for 10 minutes per day and Group II 30 mW/cm2 for 20 minutes per day, Group III without LIPUS treatment as control group. Radiological assessment was performed to assess callus formation based on the Tiedemann score. After that data is collected, data editing, coding, entry were carried out and analyzed statistically. There were significant differences between treatment group and control group towards callus diameter formation, between group I, II and control with mean of Tiedemann in each group 97.76; 169.83; 76.88; with p value < 0.05. LIPUS can enhance fracture healing in rabbit femur defect based on radiography measurement.

Keywords
fracture, femur, healing, LIPUS, mechanical, radiological

Topic
Orthopaedic Bioengineering

Link: https://ifory.id/abstract/aXmANfWFHdRU