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MacIntosh BA, Ramsden CE, Honvoh G, Faurot KR, Palsson OS, Johnston AD, Lynch C, Anderson P, Igudesman D, Zamora D, Horowitz M, Gaylord S, Mann JD. Methodology for altering omega-3 EPA+DHA and omega-6 linoleic acid as controlled variables in a dietary trial. Clin Nutr 2021; 40:3859-3867. [PMID: 34130033 PMCID: PMC8293619 DOI: 10.1016/j.clnu.2021.04.050] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2020] [Revised: 04/09/2021] [Accepted: 04/30/2021] [Indexed: 12/23/2022]
Abstract
BACKGROUND & AIMS Increasing dietary intake of n-3 EPA+DHA and lowering dietary n-6 LA is under investigation as a therapeutic diet for improving chronic pain syndromes as well as other health outcomes. Herein we describe the diet methodology used to modulate intake of n-3 and n-6 PUFA in a free living migraine headache population and report on nutrient intake, BMI and diet acceptability achieved at week 16 of the intensive diet intervention and week 22 follow-up time-point. METHODS A total of 178 participants were randomized and began one of three diet interventions: 1) a high n-3 PUFA, average n-6 PUFA (H3) diet targeting 1500 mg EPA+DHA/day and 7% of energy (en%) from n-6 linoleic acid (LA), 2) a high-n-3 PUFA, low-n-6 PUFA (H3L6) targeting 1500 mg EPA+DHA/day and <1.8 en% n-6 LA or 3) a Control diet with typical American intakes of both EPA+DHA (<150 mg/day) and 7 en% from n-6 LA. Methods used to achieve diet change to week 16 include diet education, diet counseling, supply of specially prepared foods, self-monitoring and access to online diet materials. Only study oils and website materials were provided for the follow-up week 16 to week 22 periods. Diet adherence was assessed by multiple 24 h recalls administered throughout the trial. Diet acceptability was assessed in a subset of participants at 4 time points by questionnaire. RESULTS At week 16 H3 and H3L6 diet groups significantly increased median n-3 EPA+DHA intake from 48 mg/2000 kcals at baseline to 1484 mg/2000 kcals (p < 0.0001) and from 44 mg/2000 kcals to 1341 mg/2000 kcals (p < 0.0001), respectively. In the Control group, EPA+DHA intake remained below the typical American intake with baseline median at 60 mg/2000 kcals and 80 mg/2000 kcals (p = 0.6) at week 16. As desired, LA intake was maintained in the H3 and Control group with baseline median of 6.5 en% to 7.1 en% (p = 0.4) at week 16 and from 6.5 en% to 6.8 en% (p = 1.0) at week 16, respectively. In the H3L6 group, n-6 LA decreased from 6.3 en% at baseline to 3.2 en% (p < 0.0001) at week 16. There were no significant changes in BMI or diet acceptability throughout the trial or between diet groups. CONCLUSIONS We find this diet method to be acceptable to research participants and successful in altering dietary n-3 EPA+DHA with and without concurrent decreases in n-6 LA. If n-6 LA of less than 3 en% is desired, additional techniques to limit LA may need to be employed.
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Affiliation(s)
- Beth A MacIntosh
- Metabolic and Nutrition Research Core, UNC Medical Center, 102 Mason Farm Rd., CB#7777, NC, 27599, USA.
| | - Christopher E Ramsden
- Lipid Peroxidation Unit, Laboratory of Clinical Investigation, National Institute on Aging, NIH, Baltimore, MD, USA; Intramural Program of the National Institute on Alcohol Abuse and Alcoholism, NIH, Bethesda, MD, USA; Department of Physical Medicine and Rehabilitation, University of North Carolina, Chapel Hill, NC, USA
| | - Gilson Honvoh
- Department of Physical Medicine and Rehabilitation, University of North Carolina, Chapel Hill, NC, USA; Department of Biostatistics, Gillings School of Global Public Health, Program on Integrative Medicine, Department of Physical Medicine and Rehabilitation, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
| | - Keturah R Faurot
- Department of Physical Medicine and Rehabilitation, University of North Carolina, Chapel Hill, NC, USA
| | - Olafur S Palsson
- Division of Gastroenterology and Hepatology, Department of Medicine, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
| | - Angela D Johnston
- Department of Physical Medicine and Rehabilitation, University of North Carolina, Chapel Hill, NC, USA
| | - Chanee Lynch
- Department of Physical Medicine and Rehabilitation, University of North Carolina, Chapel Hill, NC, USA
| | - Paula Anderson
- Department of Physical Medicine and Rehabilitation, University of North Carolina, Chapel Hill, NC, USA
| | - Daria Igudesman
- Department of Nutrition, Gillings School of Global Public Health, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
| | - Daisy Zamora
- Department of Psychiatry, UNC School of Medicine, Chapel Hill, NC, USA; Lipid Peroxidation Unit, Laboratory of Clinical Investigation, National Institute on Aging, NIH, Baltimore, MD, USA
| | - Mark Horowitz
- Lipid Peroxidation Unit, Laboratory of Clinical Investigation, National Institute on Aging, NIH, Baltimore, MD, USA
| | - Susan Gaylord
- Department of Physical Medicine and Rehabilitation, University of North Carolina, Chapel Hill, NC, USA
| | - John D Mann
- Department of Neurology, School of Medicine, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
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Abstract
OBJECTIVES The purpose of this study was to improve the handling and physical properties of a self-setting, water-based calcium phosphate cement by combining it with polymerizable resins and to study the setting reactions involved. METHODS Dual-cured composite cements were prepared from a calcium phosphate cement powder and dental monomers that contain carboxylated hydrophilic resins or resin/water mixtures. The setting reaction of the calcium phosphate cement in the presence of the resins was evaluated by pH measurements, infrared spectroscopy, diametral tensile strength, x-ray diffraction analysis, and scanning electron microscopy. RESULTS Carboxylated resins were chosen because they can form ionic bonds to the mineral filler, which was confirmed by appearance of an infrared absorbance peak at 1552 cm-1 within 24 h after mixing due to the formation of a carboxylate salt. Hydroxyapatite did not develop in composites prepared from resin and calcium phosphate cement. However, composites from calcium phosphate cement, resin and water showed approximately 40% hydroxyapatite. The resulting composite cements have moderately high DTS of 14-15 MPa and high pH. SIGNIFICANCE Hydrophilic acidic resins allows mixing with water and/or allow rapid diffusion of water into the resinous cement so that the dissolution and reprecipitation processes required for the conversion of the calcium phosphate components to hydroxyapatite can occur. The characteristics of the resulting composite cements suggest that the materials may be useful in pulp capping and/or cavity lining.
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Affiliation(s)
- S H Dickens-Venz
- American Dental Association Health Foundation, Paffenbarger Research Center, Gaithersburg, MD 20899, USA
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Abstract
This study evaluated and compared the contributions to dentin adhesive bonding of three N-phenylglycine analogues with electron-withdrawing substituents on the aromatic ring. These electron-deficient "N-compounds" included: N-(4-chlorophenyl)-glycine (NCPG), N-methyl-N-(4-chlorophenyl)-glycine (NMNCPG), and N-(3,4-dichlorophenyl)-glycine (NDCPG). An experimental three-step dentin-bonding protocol that consisted of sequential application of acidic ferric oxalate solution, an N-compound in acetone, and a surface-active comonomer in acetone was used. The first and third steps were held constant throughout the study. Each N-compound (NCPG, NMNCPG, NDCPG) was used in step two at ten concentrations ranging from 0.0 mol/L (pure acetone) to 5 x 10(-1) mol/L, depending on solubility. After overnight storage in distilled water, the dentin-to-composite bonds were broken in tension. The data were analyzed with ANOVA, and multiple comparisons were performed with Duncan's Multiple Range test. All statistical tests were controlled at alpha = 0.05. At 5 x 10(-3) mol/L, the relative effectiveness of the three N-compounds (as measured by tensile bond strengths) was NMNCPG > NCPG > NDCPG. Of all concentrations studied, the mean bond strengths produced with NMNCPG were statistically as good as or better than those produced by the other two compounds, and NCPG was always as good as or better than NDCPG. Increased electron-withdrawing from the nitrogen of the amine group by the substituents narrowed the effective concentration range for dentin bonding and, in general, produced lower mean bond strengths between dentin and composite.
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Affiliation(s)
- N J Miniotis
- Naval Dental School, NNDC, Bethesda, MD 20814-5077
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Abstract
Transfer of technology to the dental office could provide thin polymeric coatings over tooth crowns and accessible root surfaces. These coatings can be prepared from relatively inexpensive, commercially available materials in one-step reactions. When the monomer technique becomes available, it will provide caries protection for all of your patients.
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Affiliation(s)
- A D Johnston
- American Dental Association Health Foundation, Paffenbarger Research Center, Gaithersburg, Md
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Abstract
Three structurally related substituted amino acids (N-compounds) were studied in a three-step dentin-bonding protocol. The first step of an acidic ferric oxalate solution and the third step of a surface-active comonomer were held constant throughout the study. In the second step, the amount of the N-compound--either N-phenylglycine (NPG), N-methyl-N-phenylglycine (NMNPG), or N-phenyl-beta-alanine (NPBA)--was varied in acetone from 0 mol/L through 5 x 10(-1) mol/L in seven steps. At 1 x 10(-3) mol/L for NPG and NMNPG, average bond strength values were 7.4 +/- 2.2 and 10.5 +/- 2.7 MPa. The highest bond strength value for NMNPG was at 1 x 10(-2) mol/L, with 13.2 +/- 4.0 MPa. The highest value for NPG was at 1 x 10(-1) mol/L, with a value of 11.8 +/- 2.5 MPa. The average bond strength for NPBA did not differ from zero across the entire range of concentrations. Molar efficiency was defined as the bond strength per mole of these applied N-compounds. For the two N-compounds that did provide adhesion to dentin, NPG and NMNPG, the average bond strengths rose, peaked, and fell as the amounts of applied N-compound were increased. The molar efficiency dropped off as the concentration of applied N-compound rose. The least operator-sensitive and most efficient N-compound, NMNPG, delivered a bond strength equivalent to that of NPG, with 10% of the applied NPG amount.
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Affiliation(s)
- R E Webb
- Naval Dental School, NNDC, Bethesda, Maryland 20814-5077
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Abstract
The addition product of 2-hydroxyethyl methacrylate (HEMA) and pyromellitic dianhydride (PMDA), known as PMDM, is a mixture of two structural isomers. The para PMDM isomer--currently used in mediating adhesive bonding of restorative materials to hard tooth tissues--is a crystalline solid. The meta isomer is a liquid. In the synthesis of PMDM, the para isomer, which can be purified by crystallization, is usually present to the extent of only 50% of the product mixture. The effect of the amine catalyst structure was studied relative to its role in increasing the yield of the para isomer, either by a reduction in the amount of the meta isomer or by an increase in the extent of overall reaction. The chemical structure of the amine catalyst had an important role in the synthesis of PMDM and influenced the ratio of the isomers. Among aliphatic amines, especially noteworthy as catalysts that gave excellent yields of the para isomer in high purity were N,N-di-isopropyl-ethylamine and hexamethylenetetramine.
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Affiliation(s)
- M Farahani
- Paffenbarger Research Center, National Institute of Standards and Technology, Gaithersburg, Maryland 20899
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Abstract
Using bond strength measurements, we investigated a number of related compounds in order to elucidate the role of the surface-active ingredient, N-phenylglycine (NPG), in experimental two-step and three-step bonding protocols resulting in adhesive bonding to dentin. All active compounds identified for the two-step or the three-step protocol were N-aryl-alpha-amino acids, and the results delineate some of the key features of the NPG molecule for bonding. For the three-step protocol, there was a requirement for a secondary or tertiary aromatic amino group, a carboxylic acid group, and a single (secondary or tertiary) methylene unit between those two functional groups of the amino acid. For the two-step protocol, additional substitutions at the para position of the phenyl ring on the amine improved the bond strength. In both protocols, para-methyl- and para-chloro-substituted NPG analogues ranked higher than NPG. A "catalytic" effect of the aromatic tertiary amino group on the polymerization of the adhering resin in both procedures could not be ruled out.
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Affiliation(s)
- A D Johnston
- Paffenbarger Research Center, American Dental Association Health Foundation, Gaithersburg, Maryland 20899
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Desrosiers MF, Simic MG, Eichmiller FC, Johnston AD, Bowen RL. Mechanically-induced generation of radicals in tooth enamel. Int J Rad Appl Instrum A 1989; 40:1195-7. [PMID: 2559053 DOI: 10.1016/0883-2889(89)90062-2] [Citation(s) in RCA: 41] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Mechanical instrumentation of enamel leads to the formation of long-lived free radicals that can be conveniently measured by electron paramagnetic resonance (EPR) spectroscopy. Powdered enamel tissue exhibited EPR signals remarkably similar to the radicals formed by ionizing radiation. The observations described below lead to the conclusion that physical stress will induce a free-radical formation in dental tissues. These observations have significance for other areas of study such as dosimetry and archeological dating.
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Affiliation(s)
- M F Desrosiers
- Center for Radiation Research, National Institute of Standards and Technology, Gaithersburg, MD 20899
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Misra DN, Johnston AD. Adsorption of N-phenylglycine on hydroxyapatite: role in the bonding procedure of a restorative resin to dentin. J Biomed Mater Res 1987; 21:1329-39. [PMID: 2824518 DOI: 10.1002/jbm.820211105] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
The adsorption of N-phenylglycine (NPG) onto synthetic hydroxyapatite from ethanol solutions was studied to elucidate the role of surface-active moieties in determining the character of adsorption, and to explore the role of NPG in a bonding procedure of restorative resin to dentin. The adsorption isotherm of N-phenylglycine is reversible (and Langmuirian) from ethanol (99.8%). At maximum adsorption the phenyl rings of the adsorbed molecules lie flat on the surface and the carboxylate oxygens and amino nitrogens are anchored to the surface. The N-phenylglycine serves as an amine accelerator since the peroxide containing monomer polymerizes with the adsorbate-covered apatite. The diametral tensile strength of this composite is approximately equal to the composite filled with untreated apatite. The role of various factors contributing to adhesive strength in the bonding procedure is also discussed.
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Affiliation(s)
- D N Misra
- American Dental Association Health Foundation Paffenbarger Research Center, National Bureau of Standards, Gaithersburg, Maryland 20899
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Schultz RJ, Johnston AD, Krishnamurthy S. Thermal effects of polymerization of methyl-methacrylate on small tubular bones. Int Orthop 1987; 11:277-82. [PMID: 3623767 DOI: 10.1007/bf00271461] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
This study was designed to investigate the thermal effects of polymerization on small tubular bones. The results demonstrated only a slight increase in temperature during cement-curing in the medullary canals of these bones. The maximum rise (11.7 degrees C) was within the levels of tolerance for living bone cells. It was demonstrated that the small volumes of methyl-methacrylate cool more rapidly, hence further decreasing the deleterious effects of heat. The histological studies showed no recognisable adverse reaction to the thermal effects of methyl-methacrylate polymerization on small tubular bones or on the overlying tissue.
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Johnston AD. Aneurysmal bone cyst of the hand. Hand Clin 1987; 3:299-310. [PMID: 3584257] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
Diagnosis of aneurysmal bone cyst in the hands is confused by rarity (2%) and overlapping characteristics of other lesions, especially benign osteoblastoma and giant-cell tumor. Pseudosinusoidal vascular channels create interfaces between liquid blood (maintained by fibrolysin) and connective tissue cells. The role of trauma is inexplicable.
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Abstract
Blastomycosis osteomyelitis frequently complicates systemic blastomycosis, but it is unusual as an isolated osteolytic lesion in the asymptomatic patient. An isolated blastomycotic osteomyelitis of the distal radius was the initial manifestation of blastomycosis in a healthy young man. The lesion was originally interpreted as a sarcoma. Fungal osteomyelitis must be differentiated from radiologically similar bone neoplasms.
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Abstract
The innervation of the proximal interphalangeal joint was studied by gross dissection with magnification and histologic analysis. The joint is innervated by a constant articular branch arising from the palmar proper digital nerve at the level of the midproximal phalanx. This articular nerve bifurcates adjacent to the joint, and its terminal branches enter the joint in the midlateral plane at the junction of the palmar plate and lateral capsule. No contribution to the articular innervation was found to arise from the sensory radial, dorsoulnar cutaneous, and collateral branches of the proper digital nerve that cross the joint. The innervation of the proximal interphalangeal joint is congruent with the palmar sensory innervation and has no relation to the dorsal sensory innervation.
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Abstract
Malignant fibrous histiocytoma (MFH) is a pleomorphic sarcoma that is uncommon in children. It most frequently arises from the soft tissues; however, it has been recently established that primary bone MFH also exists. Surgical resection or amputation is the cornerstone of treatment for MFH of bone. But, with this modality of therapy alone the majority of patients develop either distant metastases or local recurrence. This study reports on three adolescent girls with MFH of bone who were successfully treated with radical resection and 18 months of adjuvant chemotherapy with vincristine, high dose methotrexate, Citrovorum Factor rescue, and Adriamycin. All three patients remain disease-free for a follow-up period of 42-48 months. The current regimen was well tolerated. Morbidity was minimal, with no patient developing any significant drug-related complications. The adjuvant chemotherapy regimen described appears to be effective in prolonging survival in patients with MFH of bone and appears to warrant further study in additional patients.
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Jacobs JC, Berdon WE, Johnston AD. HLA-B27-associated spondyloarthritis and enthesopathy in childhood: clinical, pathologic, and radiographic observations in 58 patients. J Pediatr 1982; 100:521-8. [PMID: 6977633 DOI: 10.1016/s0022-3476(82)80746-4] [Citation(s) in RCA: 97] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
HLA-B27 typing of all arthritic children helped to identify and focus attention on a subset whose disease was pathogenetically related to and demonstrated clinical features of ankylosing spondylitis and Reiter syndrome, but only rarely fulfilled current diagnostic criteria for those disorders (spondyloarthritis). In contrast to other forms of childhood arthritis, enthesopathy (inflammation at the sites of attachment of ligaments and tendons to bone) was a prominent feature in 75%; a family history of similar arthritis was obtained from 60%; boys were more frequently affected (2:1); urethritis, acute iritis, conjunctivitis, or keratoderma blennorrhagicum occurred at some time in 42%; and the initial attack followed an unexplained febrile illness, known dysentery or urethritis, or severe musculoskeletal trauma in 41%. The arthritis was generally pauciarticular, asymmetric, and primarily in the feet and large joints of the lower extremities. Distinctive radiographic features included periostitis, severe osteopenia, calcaneal erosions, and heel spurs; three of 58 had rapid destruction of a single joint. Only ten patients (all boys) were found to have radiographic sacroiliitis after an average of five years of disease, and only three had the Reiter triad. The lifetime risk of sacroiliitis and spinal ankylosis can only be determined by long-term follow-up of such prospectively identified groups of spondyloarthritic children.
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MESH Headings
- Adolescent
- Arthritis, Infectious/diagnostic imaging
- Arthritis, Infectious/immunology
- Arthritis, Infectious/pathology
- Arthritis, Reactive/diagnostic imaging
- Arthritis, Reactive/immunology
- Arthritis, Reactive/pathology
- Bone and Bones/pathology
- Child
- Child, Preschool
- Female
- HLA Antigens/analysis
- HLA-B27 Antigen
- Humans
- Infant
- Inflammation/pathology
- Ligaments, Articular/pathology
- Male
- Pain/etiology
- Prospective Studies
- Radiography
- Spondylitis, Ankylosing/diagnostic imaging
- Spondylitis, Ankylosing/immunology
- Spondylitis, Ankylosing/pathology
- Tendons/pathology
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Miranda R, Johnston AD, O'Leary JP. Incidental appendectomy: frequency of pathologic abnormalities. Am Surg 1980; 46:355-7. [PMID: 7396263] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
The incidence of pathologic abnormalities found in the appendix when it is removed incidentally at the time of jejunoileal bypass is reported. Thirty-one per cent of these appendices had significant histopathologic changes. In the authors' opinion these findings support the theory that the appendix may undergo bouts of acute inflammation that are self-limited and that the fibrosis observed in the appendix is a direct sequela of such episodes. In potentially contaminated primary procedures the addition of incidental appendectomy does not increase operative morbidity or mortality.
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Bigliani LU, Neer CS, Parisien M, Johnston AD. Dysplasia epiphysealis hemimelica of the scapula. A case report. J Bone Joint Surg Am 1980; 62:292-4. [PMID: 7358760] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
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O'Leary JP, Malik FS, Donahoe RR, Johnston AD. The effects of a minidose of heparin on peritonitis in rats. Surg Gynecol Obstet 1979; 148:571-5. [PMID: 432773] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Sprague-Dawley rats with peritonitis treated with either a subcutaneous or intraperitoneal minidose of heparin show a significant increase in survival time when compared with controls. In the treatment groups, adhesions and abscesses were less severe and localized to the area of gangrenous bowel. Heparin also significantly reduced the incidence of recovery of viable bacteria from the blood and peritoneal cavity. These findings may be related to a decreased deposition of fibrinogen within the abdomen or to the early mobilization of fibrin.
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Dick HM, Bigliani LU, Michelsen WJ, Johnston AD, Stinchfield FE. Adjuvant arterial embolization in the treatment of benign primary bone tumors in children. Clin Orthop Relat Res 1979:133-41. [PMID: 455830] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
This report presents an initial clinical experience with arterial embolization as adjuvent therapy in the surgical treatment of selected benign primary bone tumors in childhood. Embolization was dramatically effective in 4 children with spinal or pelvic vascular tumors. This technique facilitated local surgical resection and/or curettage. No child had evidence of local recurrence. Three of the 4 children had spinal cord or nerve root compression resulting in various degrees of paralysis prior to surgery. All treated patients had complete recovery from their paralysis. There were no complications of embolization or surgery. The treatment of benign primary bone tumors of the spine and pelvis is immeasurably improved by the adjuvant arterial embolization procedure. The immediate surgical treatment of these difficult tumors now becomes feasible with the greatly diminished blood flow resulting from embolization.
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Johnston AD, Parisien MV. Soft tissue tumors about the knee. Orthop Clin North Am 1979; 10:263-80. [PMID: 221873] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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Jacobs JC, Phillips PE, Johnston AD. Needle biopsy of the synovium of children. Pediatrics 1976; 57:696-701. [PMID: 940709] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/25/2022] Open
Abstract
While the diagnosis of juvenile rheumatoid arthritis is based on clinical criteria and does not require confirmation by synovial biopsy, biopsy is occasionally desired to exclude other diagnoses. Needle synovial biopsy of the knee may be performed on young children as an office procedure and generally provides adequate tissue for examination. In the author's clinic this procedure has replaced open biopsy of the knee of children.
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Tornberg DN, Dick HM, Johnston AD. Multicentric giant-cell tumors in the long bones. A case report. J Bone Joint Surg Am 1975; 57:420-2. [PMID: 1123400] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
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Worland RL, Ryder CT, Johnston AD. Recurrent osteoid-osteoma. Report of a case. J Bone Joint Surg Am 1975; 57:277-8. [PMID: 1112857] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
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Feldman F, Johnston AD. Ganglia of bone: theories, manifestations, and presentations. CRC Crit Rev Clin Radiol Nucl Med 1973; 4:303-32. [PMID: 4588950] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
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Tornberg DN, Rice RW, Johnston AD. The ultrastructure of chondromyxoid fibroma. Its biologic and diagnostic implications. Clin Orthop Relat Res 1973:295-9. [PMID: 4754214] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
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Rice RW, Cabot A, Johnston AD. The application of electron microscopy to the diagnostic differentiation of Ewing's sarcoma and reticulum cell sarcoma of bone. Clin Orthop Relat Res 1973:174-85. [PMID: 4574064 DOI: 10.1097/00003086-197303000-00026] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
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Kennedy WR, Johnston AD, Becker A. Massive articular osteolysis in rheumatoid arthritis, treated by total hip replacement. Case report and review of literature. Clin Orthop Relat Res 1973:161-73. [PMID: 4120242] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
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Dick HM, Francis KC, Johnston AD. Ewing's sarcoma of the hand. J Bone Joint Surg Am 1971; 53:345-8. [PMID: 5546706] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
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Popowitz M, Johnston AD. Osteoporosis: controlled methods of measurement. Clin Orthop Relat Res 1971; 74:185-95. [PMID: 5540398] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
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