Factors Affecting Periprosthetic Bone Loss after Hip Arthroplasty / 대한고관절학회지

Periprosthetic bone loss may lead to major complications in hip arthroplasty, including aseptic loosening, implant migration, and even periprosthetic fracture. Such a complication leads to revision surgeries, which are expensive, technically demanding, and result in a low satisfaction rate. Therefore, a study was conducted of the factors affecting the periprosthetic bone loss around the stem that caused these complications. Factors influencing periprosthetic bone loss include demographic factors such as age, sex, obesity, smoking, and comorbidity including diabetes and osteoporosis. The implant design and fixation method are also factors that are determined before surgery. In addition, there are surgical factors, such as surgical approach and surgical technique, and we wish to investigate the factors affecting periprosthetic bone loss around the stem by comparing the effects of postoperative rehabilitation protocols and osteoporosis drugs.

Total Hip Arthroplasty after Acetabular Fracture: Acute Phase and Delayed Phase

The incidence of acetabular fractures in the elderly has increased because of the increasing elderly population. To determine the treatment plan for acetabular fractures, the patient's age, gait ability, presence or absence of osteoporosis and osteoarthritis, underlying disease, and fracture pattern should be considered. The application of total hip arthroplasty for acetabular fractures with the proper indications can be expected to have a good prognosis. In this paper, the application of total hip arthroplasty as a treatment method for acetabular fractures is divided into acute and delayed phases.

Intrapelvic Migration of the Lag Screw with Wedge Wing from Dyna Locking Trochanteric Nail: A Case Report and Literature Review / 대한고관절학회지

The intrapelvic migration of cervicocephalic lag screws is a rare complication after intertrochanteric fracture synthesis with an intramedullary nail. Only 15 cases of intrapelvic penetration by three different instrument systems have been described in the literature. However, to our knowledge, there is no report of intrapelvic migration of the lag screw with wedge wing designed to increase fixation power using the Dyna locking trochanteric (DLT) nail. We present a case of intrapelvic migration of the lag screw with wedge wing from DLT nail. The patient described herein underwent a two-staged operation of implant removal without intrapelvic approach followed by bipolar hemiarthroplasty. With intrapelvic migration conditions, although it is not uncommon to require an additional intrapelvic approach, this modification can lead to lethal consequences. For this reason, it is recommended to coordinate with the vascular surgery department due to the close proximity of the major vessels.

Short-term Outcomes of Ceramic Coated Metal-on-Metal Large Head in Total Hip Replacement Arthroplasty / 대한고관절학회지

PURPOSE: This study characterizes the short-term outcomes of ceramic coated metal-on-metal (MoM) large head total hip arthroplasty (THA) in prospectively selected patients aged 70 to 75 years. MATERIALS AND METHODS: Eighteen patients (18 hips) between the ages of 70 and 75-years old with THA using ceramic-coated MoM large heads between June 2014 and December 2014 were evaluated. We prospectively selected patients younger than 70 years for bipolar hemiarthroplasty and older than 75 years for conventional THA. There were one case of osteoarthritis, 8 cases of femur neck fracture, and 9 cases of intertrochanteric fracture. All patients underwent clinical and radiological follow-up at 6 weeks, 6 and 12 months, and every year postoperatively. The mean duration of follow-up was 24.2 months (range, 18–34 months). RESULTS: The average Harris hip score at the final follow-up was 81.0, except one case which was ultimately converted to conventional THA due to acetabular cup loosening. Radiographically, mean acetabular cup inclination was 45.8°(range, 38–56°) and anteversion was 20.1° (range, 11–25°). The average femoral head size was 48.7 mm. All stems were neutral-positioned except 1 varus-positioned stem. There was 1 case of a soft tissue infection, 3 patients complained of persistent groin pain, and no dislocations occurred. CONCLUSION: Ceramic coated large MOM articulation (ACCIS) have many complications: cup loosening, groin pain, which can lead to fatal outcomes in the elderly patients. Especially in patients with communicated intertrochanter fracture (AO 31-A22, 23), careful attention should be paid to the choice of surgical option.

Superior Gluteal Artery Pseudoaneurysm Caused by Pelvic C-Clamp Blind Application: A Case Report / 대한고관절학회지

To control such a hemorrhage, a displaced pelvic ring must be rapidly reduced and stabilized with a pelvic binder, an external fixator, or a pelvic clamp. Among them, pelvic clamps can be life-saving but pin malposition may cause vascular complications. We present a case of superior gluteal artery pseudoaneurysm caused by AO pelvic C-clamp pin malposition.

Underestimated Sacroiliac Joint Lesion on Computed Tomography in Pelvic Open-book Injury: A Case Report / 대한고관절학회지

The classification of anteroposterior compression (APC) injury type is based on using static radiographs, stress radiographs are known as a useful adjunct in classifying type of APC pelvic injuries. According to a recent article, the intraoperative stress examination has led to a change in the treatment plan in more than 25% of patients on 22 patients presumed APC type I (symphyseal diastasis <2.5 cm) injuries. Here authors present a case demonstrating a necessity of intraoperative stress test for excluding concealed posterior ring disruption.

Atypical Pelvic Crescent Fracture Caused by Vertical Shear Force / 대한고관절학회지

The crescent fracture consists of a posterior iliac wing fracture with extension into the sacroiliac joint and a dislocation of the sacroiliac joint. This fracture represents a subset of lateral compression injury. The strong posterior ligaments of sacroiliac joint remain intact and a fracture fragment (crescent shape) involving the posterior superior iliac spines remains firmly attached to the sacrum. We report a patient with atypical pelvic crescent fracture that is mainly influenced by vertical shear injury and is characterized by posterior fracture-dislocations of the sacroiliac joint. In this case report, we review the literature on classification and treatment of atypical type of crescent fracture.

Surgical Correction and Osteosynthesis for Cranial Displaced Pelvic Nonunion: Technical Note and Two Cases Report Regarding Anterior Correction and Osteosynthesis Following Posterior Release

Nonunion of an unstable pelvic fracture with cranial displacement pelvic surgery is technically difficult due to a large amount of bleeding and the risk of nerve damage. In addition, surgical correction of leg length discrepancy by reduction of a dislocated sacroiliac joint is in high demand. Nevertheless, when a patient is strongly disabled by a pelvic deformity, surgical correction may be necessary. Two patients with pelvic deformity were treated successfully by surgical correction and osteosynthesis.

Dyspareunia Caused by Pelvis Malunion / 대한고관절학회지

In unstable pelvic ring injury, if there is damage to both the anterior and posterior, both anterior and posterior fixation will be needed in order to stabilze the pelvic ring. A female patient complained of dyspareunia due to malunion and additional bone bridge at the inferior ramus of the pelvis. She should have undergone both anterior and posterior fixation, but had undergone anterior fixation only. We report on a patient who was treated successfully with resection of additional bone bridge, scar tissue and adhesive band around the vagina.

Treatment of Unstable Pelvic Ring Injuries / 대한고관절학회지

Pelvic fractures are classified according to the stability of the pelvic ring. Unlike stable pelvic fractures, which heal without complications, unstable fractures may lead to pelvic ring deformities, which cause severe complications. An orthopedic surgeon must determine the stability of the pelvic ring by radiography and physical examination of the patient in order to ensure early, prompt treatment. This article includes anatomy of the pelvic ring, classification of pelvic ring injuries, its treatment algorithm, and corresponding cases involving unstable pelvic ring injury.

Comparison of Postoperative Bleeding and Complications between Cemented and Non-cemented Bipolar Hemiarthroplasty in Treatment of Unstable Pertrochanteric Fracture / 대한고관절학회지

PURPOSE: In cases of patients who underwent bipolar hemiarthroplasty (BPHA) for treatment of a pertrochanteric fracture, we compared and analyzed the amount of blood loss and complications between a group using the cemented stem and a group using the cementless stem. MATERIALS AND METHODS: A total of 104 patients who underwent BPHA for treatment of a pertrochanteric fracture in our hospital for three years and 10 months (From January 2008 to October 2011) were included in this study. Among the 104 patients, 64 patients with a cemented stem were categorized into group 1, and the other 40 patients with an uncemented stem were categorized into group 2. Before surgery, the type of stem was determined by the bone quality of the proximal femur, which had been evaluated with a simple X-ray. Then, after surgery, the amount of blood loss and complications were compared between the two groups. RESULTS: Expected blood loss during the operation was 389.8 cc in group 1, and 395.3 cc in group 2(P=0.88). Postoperatively, average drained blood loss was 219.6 cc in group 1, and 338.1 cc in group 2. Cemented stem was associated with significantly less blood loss (P=0.004). The average operation time in group 1 and in group 2 was 96 minutes and 72 minutes. There was no significant difference in operating time (P=0.85). In addition, there was no difference in INR (International Normalized Ratio) and BMI (Body Mass Index) (P=0.28 and 0.08) regarding total amount of postoperatively drained blood loss. There was no occurrence of hypotensive shock or fatal pulmonary embolism in either group. Three cases of periprosthetic fracture occurred in group 2. CONCLUSION: Fewer occurrences of postoperative blood loss and fewer complications were observed in the cemented stem group than in the cementless stem group. Preoperative evaluation of bone quality and use of the cement stem for patients with poor bone quality may be a good treatment method that can help to reduce complications.

Fixation of Greater Trochanter Using an AO Trochanteric Reattachment Device (AO TRD) in Arthroplasty for Intertrochanteric Femur Fracture of Elderly Patients / 대한고관절학회지

PURPOSE: The purpose of this study is to evaluate the efficacy of the trochanter reattachment device (TRD) as a firm internal fixation method for bipolar hemiarthroplasty in unstable intertrochanteric femur fracture for elderly patients over 65 years old. MATERIALS AND METHODS: From September 2010 to April 2011, 19 patients (M/F: 1/18) over 65 years old were treated with bipolar hemiarthroplasty using the TRD as a fixation method for intertrochanteric femur fracture with above Evans-Jensen classification 2nd (above AO/OTA A1.3). They were followed up for more than 12 months(12-29 months). RESULTS: Out of 19 patients, only one had loosening of the TRD plate and reoperation was performed. There was no dislocation after surgery. Complete fracture union was observed in 19 patients with follow up of more than 12 months. CONCLUSION: In bipolar hemiarthroplasty for intertrochanteric femur fracture, TRD produced easy and firm fixation. Additional fixation with TRD restoring abduction force by union of greater trochanter can be a good choice of surgery for avoidance of dislocation and chronic pain due to trochanteric nonunion after arthroplasty.

Clinical Features of Distal Tibial Fractures and Treatment Results of Minimally Invasive Plate Osteosynthesis / 대한족부족관절학회지

PURPOSE: The purpose of this study is to analyze the clinical features of distal tibia fractures and to evaluate the treatment outcomes of minimally invasive plate osteosynthesis (MIPO). MATERIALS AND METHODS: From January 2004 to December 2009, 84 cases of 81 patients treated with plate fixation for distal tibia fracture were enrolled in this retrospective review. We investigated age, sex, injury mechanism, fracture patterns, and complications, and the clinical features were analyzed. To evaluate the treatment outcomes of MIPO, we divided into two groups. MIPO group consisted of 55 patients were treated with MIPO technique and conventional group consisted of 18 patients were treated with open reduction and internal fixation with conventional anterolateral plating. The results were compared between two groups by assessing bony union time, operation time, amount of blood loss, range of ankle motion, clinical score by American Orthopaedic Foot and Ankle Society (AOFAS) score, and post-operative complications. RESULTS: The mean age of 81 patients with distal tibia fracture was 54.8 years. According to AO classification, A1:2:3 were 16, 20, 16 patients, B1:2:3 were 2, 8, 7, C1:2:3 were 1, 3, 11 patients. According to injury mechanism, slip down injury was patients, traffic accident was 26, fall from height injury was 14 patients respectively. The type A fractures were lower energy trauma and more older patients. The type C fractures were higher energy trauma and younger patients. MIPO group was better than conventional group in operative time, blood loss, bony union time, and ankle joint motion. In complications, MIPO group showed no nonunion and infection, one malunion, one skin necrosis, nine skin irritations, and one screw breakage. Conventional group showed two nonunion, four infections, two skin necrosis, and one metal failure. CONCLUSION: Distal tibial fractures caused by low energy trauma were on the increase. Minimal invasive plate osteosynthesis was shorter bony union time and operation time, less blood loss, and larger ankle motions than conventional open reduction and plate fixation.

Reverse Shoulder Arthroplasty for Humeral Head Fracture with Massive Rotator Cuff Tear in Elderly Patient / 대한정형외과학회잡지

There are several methods to treat anatomic neck fracture of humerus in elderly patients. It is not easy to obtain optimal clinical or radiological results because of unstable fixaton of fractured site attributed to multifractured osteoporotic tuberosities and combined massive rotator cuff tears in these patients. These factors often lead to high failure rate of implantation. Alternative methods of treatment have been proposed to reduce complications and improve shoulder functions. Reverse shoulder prosthesis was originally designed for patients with cuff tear arthropathy. Indications for reverse shoulder arthroplasty have expanded with initial success. However, there are few reports to perform reverse shoulder prosthesis in proximal humerus fracture. We performed reverse shoulder arthroplasty in a 74-year-old man with right anatomic neck fracture of humerus and concomitant massive rotator cuff tear.

Treatment of Distal Femoral Fractures Using Polyaxial Locking Plate

PURPOSE: To report the clinical outcome of polyaxial locking plate (Noncontact bridging (NCB) plate (Zimmer, Warsaw, Indiana)) for the treatment of distal femur fracture with minimal invasive percutaneous periosteal osteosynthsis (MIPPO) technique. MATERIALS AND METHODS: Between February 2008 to April 2010, twenty six patients (11 men, 15 women), twenty eight cases diagnosed as distal femoral fractures are enrolled in this retrospective study. The mean age of the patients was 63 years (34 to 85) and the mean follow-up was 20.3 months (12 to 32). According to the AO/ASIF classification, 15 fractures were type A, 1 type B and 9 type C. And there were 3 periprsthetic fractures around knee. The analysis of the clinical and radiologic outcome were performed by Sanders functional evaluation scale and radiologic follow up after operation, respectively. RESULTS: Among 28 cases, 25 cases united without additional operation. According to Sanders functional evaluation scale, there were 11 excellent, 9 good, 4 fair, 2 poor. As complications, there were 1 knee stiffness, 1 delayed union, 1 implant failure with refracture, 1 implant loosening. Three patients except one knee stiffness, underwent a second LISS plating using NCB plate and and bone grafting, resulting in a satisfactory final outcome. CONCLUSION: Internal fixation using polyaxial locking plate with MIPO technique may be one of the most effective methods for the treatment of distal femoral fractures.

Treatment for the Acetabular Fracture

The acetabulum is the socket of the hip joint and incongruence of the joint surface caused by fracture causes hip pain and posttraumatic arthritis. The usual choice of treatment for displaced acetabular fracture is operative treatment, which entails a challenging, stiff learning curve. The principle of treatment is restoring the stable and congruent hip joint for early mobilization to prevent local and systemic complications.

Arthroscopic Treatment of Popliteal Cysts using the Trans-Septal Approach

PURPOSE: The purpose of this study is to evaluate the usefulness of the trans-septal approach for treating popliteal cyst, to determine the frequency and types of the associated pathologies and to assess the follow up ultrasound evaluation. MATERIALS AND METHODS: From February, 2002 to February, 2007, 44 patients with popliteal cyst were treated by arthroscopy only. Fourteen patients were male and 30 patients were female. Their average age was 50 years (range: 20~77 years). We used the trans-septal portal approach. We evaluated the satisfaction of the patients and the recurrence of the popliteal cyst by performing ultrasound exams at an average follow up of 36 months after surgery. At the final follow up, we evaluated the clinical results by the criteria of Rauschning and Lindgren. RESULTS: We found no communication between the knee joint and the popliteal cyst by CT or MRI in 4 cases (8%), but we found a communication by arthroscopy in all the cases. Thirty-four cases had intra-articular pathologies and 9 cases didn't. The total intra-articular pathologies included 17 articular cartilage defects or chondral lesion (38%) and 15 meniscus tears (34%). In 1 case, open excision was performed for the revision surgery because the patient had recurrence of the popliteal cyst, which caused compressive neuropathy of the common peroneal and tibial nerve. At the last follow up, the clinical outcome of surgery according to the criteria of Rauschning and Lindgren was grade 0 (28 cases), grade1 (12 cases), grade 2 (3 cases) and grade 3 (1 case). CONCLUSION: We can approach the orifice of a popliteal cyst directly with using the trans-septal portal and easily decompress the orifice of the cyst. We propose that the arthroscopic decompression using the trans-septal portal is an excellent treatment modality for popliteal cysts.

Modified Double Tension Band Wiring for Reattaching the Greater Trochanter When Performing Hemiarthroplasty for Intertrochanteric Fracture in Elderly Patients

PURPOSE: We wanted to evaluate the clinical and radiological results after performing arthroplasty for an intertrochanteric fracture in patients 70 years of age or older, and we used a new fixation technique of the greater trochanter. MATERIAL AND METHODS: From January, 2004 to August 2007, we treated 21 cases (M/F: 3/18) of intertrochanteric fracture with hemiarthroplasty with modified double tension band wiring. All the cases were above type 2 (AO/OTA A1.3) according to the Jensen modification of the Evans classification, and all the patients were elderly. The fractures were evaluated for the fracture pattern by using simple radiography and 3D computed tomography. We analyzed the clinical and radiological results at a minimum of 12 months (range: 12~36 months). RESULTS: We performed hemiarthroplasty with modified double tension band wiring. Two cases (9.5%) among the 21 cases developed loss of reduction due to an additional injury and one of them underwent reoperation using a greater trochanter reattachment device (GTRD). The greater trochanters were well maintained without displacement and excellent union was seen at the fracture site of 19 cases. CONCLUSION: The modified double tension band wiring technique, along with several other fixation methods, should be considered to easily obtain rigid fixation in an unstable intertrochanteric fracture.

A pitfall for short external rotator preserving THA : A Case Report

The posterior and posterolateral surgical approach has been frequently used for total hip replacement arthroplasty (THA). But there is a risk of dislocation with this method and so several other methods for preventing dislocation have been presented. The short external rotator preserving technique is currently under the limelight and the reported clinical outcomes have been good. But we report here on one case of disruption of the piriformis muscle from the origin site due to excessive tension during total hip arthroplasty with using the short external rotator preserving technique. We think the conventional approach is safer than the short external preserving approach if excessive tension has to be loaded on the short external rotator for obtaining an appropriate intraoperative field for the patient with a large skeletal structure or the obese patient.

Comparison with Number and Position of Percutaneous Iliosacral Screws as Treatment of Unstable Pelvic Fracture / 대한정형외과학회잡지

PURPOSE: A closed reduction of the posterior arch and percutaneous fixation with S1 and S2 iliosacral (IS) screw was performed on an unstable pelvis fracture with a disruption of the sacroiliac complex. The radiological and clinical results were analyzed according the number of screws and their position. MATERIALS AND METHODS: Of 31 cases with an unstable pelvis fracture involving the sacral complex, classified as Tile type C (AO/OTA), 16 and 15 cases were treated with one S1 screw fixation and two screws fixation into S1 and S2, respectively, using a percutaneous fixation technique. The patients were followed up for a minimum of 12 months and the radiological and clinical outcomes were analyzed statistically using the Majeed score and SF-36. RESULTS: Five cases of screw displacement occurred in the one screw fixation group. On the other hand, there was no screw displacement in the two screws fixation group after a mean follow-up of 40.2 months. In the case of a narrow safe zone (iliac cortical density, ICD), it is impossible to fix with two S1 screws. However, in these patients, good clinical results were achieved with S1 and S2 were achieved with S1 and S2 screw without complications. CONCLUSION: The technique of two screws fixation is an efficient and reliable method for reducing and fixing the unstable pelvic ring disruptions. Additional S2 screw fixation is recommended for patients with a narrow ICD.