The present study was carried out to investigate the relationships between the depth of overbite and the masseteric silent period Normal subjects of 44 were selected, which consisted of 9 open bites, 24 normal overbites and 11 deep bites, all were 19-29 years of age EMG activity was recorded on the bilateral masseteric muscles and craniofacial radiography was done. The following results were obtained 1. The mean duration of masseteric silent period was 18.58+/-4.50 msec in open bite, 17.37+/-7.05 msec in normal overbite and 19.30+/-7.62 msec in deep bite groups. 2. There were no significant differences on masseteric silent period among open bite, normal overbite and deep bite groups. 3. There were no significant correlations between masseteric silent period and craniofacial variables.
Muscles ; Open Bite* ; Overbite* ; Radiography

The lateral margin of the psoas muscle, contrasted by retroperitoneal fat, is usually visualized o plainabdominal radiography. Failure to visualize all or segment of lateral margin of the psoas muscle, so called psoassing, has been emphasized as reliable finding of retroperitoneal pathology. But the significance of psoas sign hasbeen controversial. The authors reevaluated ‘psoas sign’ by comparing 160 abdominal radiography with CT. Theresults were as follows: 1. In 160 supine radiographys, good visualization was present in 106 cases(66.3%), faintvisualizatin in 24(15.0%), segmental nonvisualization in 18(11.3%), and completer nonvisualization in 12(7.5%). In113 erect radiographs, good visualization was present in only 36 cases(31.9%). 2. Asymmetric visualization waspresent in 84 out of 160 cases. In patient with scoliosis, lateral margin of convex side was seen more clearlythan concave side, and this finding was statistically significant (p<0.005). 3. Ascites did not directly influenceto psoa visualization contrary to common belief. 4. In 54 cases of faint or nonvisualization, normal was16(29.6%), intraperitoneal pathology was 16(29.6%), and retroperitoneal pathology was 22(40.7%). 1) In normalpatient, psoas contact with kidney or intestine and deformed psoas muscle were responsible for poor visualization. 2) The major cause of poor visualization in intraperitoneal pathology were psoas contact with displaced kidney byhepatomegaly, ascites with scanty retroperitoneal fat and derformed psaos muscle. 3) The major cause of poorvisualization in retroperitoneal pathology were psoas invasion by tumor or inflammation, psoas conntact withenlarged kidney or perirenal lesion. 5. In summary, the mechanism of faint or nonvisualization of psoas marginwere: 1) psoas contact with normal or pathologic organs 2) psoas invasion by tumor or inflammation 3) deformedpsoas muscle 4) scanty retroperitoneal fat
Ascites ; Humans ; Inflammation ; Intestines ; Intra-Abdominal Fat ; Kidney ; Pathology ; Psoas Muscles ; Radiography ; Radiography, Abdominal ; Scoliosis

OBJECTIVE: To investigate the effects of asymptomatic back muscle weakness and spinal deformity on low back pain (LBP). METHODS: Sixty healthy subjects without LBP participated in this study. Radiography and an isokinetic/isometric dynamometer were used to respectively measure spinal scoliosis/lordosis and the strength of the trunk flexors/extensors. After 2 years, 48 subjects visited the hospital again and LBP episodes, its severity and the Korean version of the Oswestry Disability Index were assessed. Differences between the group with LBP and the group without LBP were evaluated and the association with LBP incidence and severity was determined. RESULTS: Sex, age, and trunk strength were significantly different in both group. Sex and age were significantly positive associated with LBP incidence. The isometric trunk flexor and extensor strength, maximum isokinetic trunk flexor and extensor strength were significantly and negatively associated with the LBP severity. The maximum isokinetic trunk extensor and maximum isometric trunk extensor strength was significantly negative associated with the LBP incidence. CONCLUSION: LBP incidence is associated with isometric and isokinetic trunk extensor weakness, whereas LBP severity is associated with age, sex, isokinetic trunk extensor and flexor weakness, isometric trunk extensor and flexor weakness.
Back Muscles ; Congenital Abnormalities ; Incidence ; Low Back Pain* ; Muscle Strength Dynamometer ; Muscle Weakness ; Muscles* ; Pilot Projects* ; Radiography ; Risk Factors*

OBJECTIVE: To investigate the effects of asymptomatic back muscle weakness and spinal deformity on low back pain (LBP). METHODS: Sixty healthy subjects without LBP participated in this study. Radiography and an isokinetic/isometric dynamometer were used to respectively measure spinal scoliosis/lordosis and the strength of the trunk flexors/extensors. After 2 years, 48 subjects visited the hospital again and LBP episodes, its severity and the Korean version of the Oswestry Disability Index were assessed. Differences between the group with LBP and the group without LBP were evaluated and the association with LBP incidence and severity was determined. RESULTS: Sex, age, and trunk strength were significantly different in both group. Sex and age were significantly positive associated with LBP incidence. The isometric trunk flexor and extensor strength, maximum isokinetic trunk flexor and extensor strength were significantly and negatively associated with the LBP severity. The maximum isokinetic trunk extensor and maximum isometric trunk extensor strength was significantly negative associated with the LBP incidence. CONCLUSION: LBP incidence is associated with isometric and isokinetic trunk extensor weakness, whereas LBP severity is associated with age, sex, isokinetic trunk extensor and flexor weakness, isometric trunk extensor and flexor weakness.
Back Muscles ; Congenital Abnormalities ; Incidence ; Low Back Pain* ; Muscle Strength Dynamometer ; Muscle Weakness ; Muscles* ; Pilot Projects* ; Radiography ; Risk Factors*

Papillary fibroelastoma is a rare benign cardiac tumor that represents 10% of all primary cardiac tumors. Diagnosis is accomplished incidentally by echocardiography that is usually performed for another purpose. Most papillary fibroelastomas are asymptomatic, but the lesions are recognized as a cause of embolisms. To the best of our knowledge, there has been no case report of computed tomography findings of a papillary fibroelastoma. We report a case of a papillary fibroelastoma in a 78-yr-old woman who had dyspnea and chest tightness. Echocardiography revealed a small lobulated mobile echogenic mass attached to the aortic valve, and CT demonstrated a lobulated soft tissue density mass with a thin stalk at the sinotubular junction of the aortic valve.
Aged ; Aortography/*methods ; Female ; Fibroma/*radiography/*surgery ; Heart Neoplasms/*radiography/*surgery ; Humans ; Papillary Muscles/*radiography/*surgery ; Tomography, X-Ray Computed/*methods ; Treatment Outcome

STUDY DESIGN: An in-vivo experiment. OBJECTIVES: To evaluate the feasibility of achieving bone formation by percutaneous gene delivery, with plasmid DNA encoding BMP-7(OP-1). SUMMARY OF LITERATURE REVIEW: Currently, the preferred method for posterolateral spinal fusion involves decortication of the transverse process, followed by a graft of autogenous bone harvested from the iliac crest. Unfortunately, this procedure suffers from significant morbidity, including blood loss, infection and persistent pain at the harvest site. MATERIAL AND METHODS: 24 Sprague-Dawley rats, weighing approximately 250~300 g, were used. The percutaneous injection was attempted above both the L5 transverse processes. The animals were divided into three groups, according to the injection materials: 1) OP-1 gene/collagen, 2) recombinant OP-1 protein/collagen and 3) control of PBS/collagen. At 2 and 4 weeks post-injection, the animals were sacrificed. The gross, radiological and histological findings were analyzed. RESULTS: No bone was detected grossly by manual palpation or radiography in the groups receiving OP-1 gene/collagen at either time point. The histological findings revealed the initiation of endochondral bone formation within the paraspinal muscle, directly above the L5 transverse process. In the rhOP-1 protein/collagen groups, the gross, radiological and histological findings revealed extensive cartilage and bone formation at both 2 and 4 weeks. CONCLUSION: In conclusion, the authors confirmed the feasibility of achieving bone formation by percutaneous gene delivery, with plasmid DNA encoding BMP-7(OP-1).
Animals ; Cartilage ; DNA ; Osteogenesis ; Palpation ; Paraspinal Muscles ; Plasmids ; Radiography ; Rats, Sprague-Dawley ; Spinal Fusion* ; Transplants

Computerized tomography has been used in the evaluation of the intracranial lesions. Recently the usage of computerized tomography has progressively widened in many fields of clinical practice. In orthopedics computerized tomography has been tried in the diagnosis and the determination of treatment of tumors, spinal disorders, hip disorders and knee problem. Four problem cases in which concentric reduction could not be obtained after closed reduction of hip dislocations were evaluated by computerized tomography from Apr, 1, 1983 to Mar. 31, 1984 in the Capital Armed Forces General Hospital and following conclusiions were obtained: 1. Open reduction revealed that muscles(adductor and pyriformis muscles), joint capsule and osteocartilaginous loose bodies (femoral and acetabular) were interposed to hinder concentric reduction. Large posterior acetabular fragment induced instability and redislocation of the hip. 2. When there were 2-3 mm lack of symmetry of the two femoral heads or any abnormal findings(breakage of Shenton's line etc.) in plain roentgenography, computerized tomography was recommanded, and muscles, osteocartilaginous loose bodies and instability were found. 3. Computerized tomography is an easy simple method and has a great diagnostic value in the evaluation of asymmetry and instability after closed reduction of traumatic hip dislocations.
Acetabulum ; Arm ; Diagnosis ; Head ; Hip Dislocation ; Hip ; Hospitals, General ; Joint Capsule ; Knee ; Methods ; Muscles ; Orthopedics ; Radiography

OBJECTIVE: To assess whether multi-echo Dixon magnetic resonance (MR) imaging with simultaneous T2* estimation and correction yields more accurate fat-signal fraction (FF) measurement of the lumbar paravertebral muscles, in comparison with non-T2*-corrected two-echo Dixon or T2*-corrected three-echo Dixon, using the FF measurements from single-voxel MR spectroscopy as the reference standard. MATERIALS AND METHODS: Sixty patients with low back pain underwent MR imaging with a 1.5T scanner. FF mapping images automatically obtained using T2*-corrected Dixon technique with two (non-T2*-corrected), three, and six echoes, were compared with images from single-voxel MR spectroscopy at the paravertebral muscles on levels L4 through L5. FFs were measured directly by two radiologists, who independently drew the region of interest on the mapping images from the three sequences. RESULTS: A total of 117 spectroscopic measurements were performed either bilaterally (57 of 60 subjects) or unilaterally (3 of 60 subjects). The mean spectroscopic FF was 14.3 +/- 11.7% (range, 1.9-63.7%). Interobserver agreement was excellent between the two radiologists. Lin's concordance correlation between the spectroscopic findings and all the imaging-based FFs were statistically significant (p < 0.001). FFs obtained from the T2*-corrected six-echo Dixon sequences showed a significantly better concordance with the spectroscopic data, with its concordance correlation coefficient being 0.99 and 0.98 (p < 0.001), as compared with two- or three-echo methods. CONCLUSION: T2*-corrected six-echo Dixon sequence would be a better option than two- or three-echo methods for noninvasive quantification of lumbar muscle fat quantification.
Adult ; Aged ; Aged, 80 and over ; Female ; Humans ; Image Processing, Computer-Assisted ; Low Back Pain/*radiography ; Magnetic Resonance Imaging/instrumentation/*methods ; Male ; Middle Aged ; Muscles/radiography ; Spinal Cord

To evaluate the usefulness of MR in the osteomyelitis, we reviewed MR examinations of 14 patients with pyogenic osteomyelitis of the long bone. All 14 patients were confirmed to have osteomyelitis either surgically (13/14) or by aspiration (1/14). MRI was performed with 0.5R (n=8) or 2.0T (n=6) SE technique, and Gd-DTPA enhanced T1WI was obtained in 10 examinations. Anatomic location of lesions were femur (8/14), tibia (5/14),m and fibula (1/14). The marrow cavity and soft tissue were involved in 13/14, 12/14 respectively. The signals of both intraosseous and extraosseous infected area were iso to low signal intensity to muscles on T1WI and high signal intensity on PDWI & T2WI. Rim or diffuse enhancement of the marrow cavity and soft tissue were seen in all (10/10) cases. Sequestra, periosteal reaction. And cortical defect were found in 12/14, 10/14, 9/14. MR provided more accurate and detailed anatomic information including extent of disease and possible activity than bone scintigraphy, CT, or conventional radiography. We conclude that MR might be the choice of modality in the diagnosis of osteomyelitis of the long bone.
Bone Marrow ; Diagnosis ; Femur ; Fibula ; Gadolinium DTPA ; Humans ; Magnetic Resonance Imaging ; Muscles ; Osteomyelitis* ; Radiography ; Radionuclide Imaging ; Tibia

PURPOSE: Massive and irreparable rotator cuff tears present a difficult treatment problem, and if further progressed, then cuff tear arthropaty may develop. We treated seven cases of massive rotator cuff tears with latissimus dorsi tendon transfer and report their clinical results. METHODS: Seven patients of mean age of 64 years (range, 51-70 years) with irreparable massive rotator cuff tears were treated using latissimus dorsi tendon transfer. The latissimus dorsi flap was harvested through an axillary approach and reattached on the greater tuberosity, using transosseous suture with non-absorbable sutures. Outcomes were assessed clinically and radiographically after an average of 48 months (range, 28-68 months). RESULTS: The VAS pain scores improved from 6.3 to 3.3 points (p=0.019). Forward flexion increased from 62° to 105°, abduction increased from 49° to 94°, and external rotation increased from 15° to 34°. Postoperative antero-posterior radiography revealed a mean 0.1 mm depression of the humeral head, without statistical the mean American Shoulder and Elbow Surgeons score improved from 44 to 76. The acromiohumeral distance showed slight increase in amount of 0.1 mm without statistical significance. There was no complication. CONCLUSION: Latissimus dorsi transfer is a useful surgical option for treating irreparable massive rotator cuff tears.
Depression ; Elbow ; Humans ; Humeral Head ; Radiography ; Rotator Cuff* ; Shoulder ; Superficial Back Muscles* ; Surgeons ; Sutures ; Tears* ; Tendon Transfer* ; Tendons*