ABSTRACT
Immune thrombocytopenic purpura [ITP] is an immune-mediated acquired disease found in both adults and children. It is characterized by transient or persistent decreases in the platelet count. We report a case of ITP detected based on oral hemorrhagic symptoms. The patient was a 79-year-old female with no significant past medical history. She presented with sudden onset of gingival bleeding and hemorrhagic bullae on the buccal mucosa. Gingival bleeding was difficult to control. Laboratory tests revealed severe thrombocytopenia with a platelet count as low as 2000/micro L. Under a provisional diagnosis of a hematological disorder, she was referred to a hematologist. A peripheral smear showed normal-sized platelets. A bone marrow examination revealed increased numbers of megakaryocytes without morphologic abnormalities. The patient was diagnosed with ITP and treated with a combination of pulsed steroid therapy and high-dose immunoglobulin therapy. However, her severe thrombocytopenia was refractory to these treatments. Then, a thrombopoietin receptor agonist was begun as a second-line treatment. Her platelets rapidly increased, and no bleeding complications were reported. Because oral symptoms can be one of the initial manifestations of ITP, dentists should be familiar with the clinical appearance of ITP, and attention must be paid to detect and diagnose unidentified cases
ABSTRACT
PURPOSE: The purpose of this study was to investigate the effects of implant tilting and the loading direction on the displacement and micromotion (relative displacement between the implant and bone) of immediately loaded implants by in vitro experiments and finite element analysis (FEA). METHODS: Six artificial bone blocks were prepared. Six screw-type implants with a length of 10 mm and diameter of 4.3 mm were placed, with 3 positioned axially and 3 tilted. The tilted implants were 30° distally inclined to the axial implants. Vertical and mesiodistal oblique (45° angle) loads of 200 N were applied to the top of the abutment, and the abutment displacement was recorded. Nonlinear finite element models simulating the in vitro experiment were constructed, and the abutment displacement and micromotion were calculated. The data on the abutment displacement from in vitro experiments and FEA were compared, and the validity of the finite element model was evaluated. RESULTS: The abutment displacement was greater under oblique loading than under axial loading and greater for the tilted implants than for the axial implants. The in vitro and FEA results showed satisfactory consistency. The maximum micromotion was 2.8- to 4.1-fold higher under oblique loading than under vertical loading. The maximum micromotion values in the axial and tilted implants were very close under vertical loading. However, in the tilted implant model, the maximum micromotion was 38.7% less than in the axial implant model under oblique loading. The relationship between abutment displacement and micromotion varied according to the loading direction (vertical or oblique) as well as the implant insertion angle (axial or tilted). CONCLUSIONS: Tilted implants may have a lower maximum extent of micromotion than axial implants under mesiodistal oblique loading. The maximum micromotion values were strongly influenced by the loading direction. The maximum micromotion values did not reflect the abutment displacement values.
Subject(s)
Dental Implants , Finite Element Analysis , Immediate Dental Implant Loading , In Vitro TechniquesABSTRACT
PURPOSE: This study investigated the effects of bone density and crestal cortical bone thickness at the implant-placement site on micromotion (relative displacement between the implant and bone) and the peri-implant bone strain distribution under immediate-loading conditions. METHODS: A three-dimensional finite element model of the posterior mandible with an implant was constructed. Various bone parameters were simulated, including low or high cancellous bone density, low or high crestal cortical bone density, and crestal cortical bone thicknesses ranging from 0.5 to 2.5 mm. Delayed- and immediate-loading conditions were simulated. A buccolingual oblique load of 200 N was applied to the top of the abutment. RESULTS: The maximum extent of micromotion was approximately 100 μm in the low-density cancellous bone models, whereas it was under 30 μm in the high-density cancellous bone models. Crestal cortical bone thickness significantly affected the maximum micromotion in the low-density cancellous bone models. The minimum principal strain in the peri-implant cortical bone was affected by the density of the crestal cortical bone and cancellous bone to the same degree for both delayed and immediate loading. In the low-density cancellous bone models under immediate loading, the minimum principal strain in the peri-implant cortical bone decreased with an increase in crestal cortical bone thickness. CONCLUSIONS: Cancellous bone density may be a critical factor for avoiding excessive micromotion in immediately loaded implants. Crestal cortical bone thickness significantly affected the maximum extent of micromotion and peri-implant bone strain in simulations of low-density cancellous bone under immediate loading.
Subject(s)
Bone Density , Dental Implants , Finite Element Analysis , MandibleABSTRACT
We evaluated the efficacy, usefulness and safety of acupuncture and moxibustion treatment in rheumatoid arthritis, by the randomized, parallel-group, multi-center study with the drug-treated outpatient group as the control. The endpoints, important in the clinical assessment of acupuncture treatment, included the improvement criteria in ACR core set variables and the Japanese version of the Arthritis Impact Measurement Scales Version 2 (AIMS-2), a system of evaluation of the QOL of patients with RA.<br>Regarding intervention (therapy), a therapy chart for each stage of disease was drawn up to give local and systemic treatment in consideration of the patient's activity and disability in each stage of rheumatoid arthritis, so that generally consistent therapy adapted to the patient's condition would be provided. Result 1. Patients eligible for analysis were 80 patients of A-group (drug therapy group) (80 females, 2 males, 2dropped) and 90 patients of B-group (drug plus acupuncture and moxibustion group), total 170 patients. 2. Patients who satisfied the improvement criteria in ACR core set variables (improved patients) were 8 of 80 patients in A-group and 20 of 90 patients in B-group. The improvement rate was significantly higher for B-group treated by drug plus acupuncture and moxibustion versus A-group, with P=0.04 in 2×2 table chi square test. 3. In QOL change investigated by AIMS-2 questionnaire, the improvement occurred significantly more frequently in the drug plus acupuncture and moxibustion group, with difference between groups at 12 months after the initiation of clinical study at P=0.001. 4. Changes in the subjects included in AIMS-2 questionnaire: Improvement was significantly more frequent in the drug plus acupuncture and moxibustion group versus drug therapy group in respect to the ability to walk, finger function, housework, sociableness, pain, mood, and the degree of subjective improvement. In the present randomized, parallel-group, multicenter study, a significant improvement was detected in the drug plus acupuncture and moxibustion group versus the drug therapy group in the aforesaid respect, which suggested that the use of acupuncture and moxibustion combined with the conventional therapy would prevent deterioration of physical functions, improve blood circulation, stabilize mental status, and thereby contribute to the improvement of QOL in patients with rheumatoid arthritis.
ABSTRACT
We evaluated the efficacy, usefulness and safety of acupuncture and moxibustion treatment in rheumatoid arthritis (RA), by the randomized, parallel-group, multi-center study with the drug-treated outpatient group as the control. The endpoints, important in the clinical assessment of acupuncture treatment, included the improvement criteria in ACR core set variables and the Japanese version of the Arthritis Impact Measurement Scales Version 2 (AIMS-2), a system of evaluation of the quality of life (QOL) of patients with RA.<BR>Regarding intervention (therapy), a therapy chart for each stage of disease was drawn up to give local and systemic treatment in consideration of the patient's activity and disability in each stage of RA, so that generally consistent therapy adapted to the patient's condition would be provided. Result 1. Patients eligible for analysis were 80 patients of A-group (drug therapy group) (80 females, 2 males) and 90 patients of B-group (drug plus acupuncture and moxibustion group), total 170 patients. 2. Patients who satisfied the improvement criteria in ACR core set variables (improved patients) were 8 of 80 patients in A-group and 20 of 90 patients in B-group. The improvement rate was significantly higher for B-group treated by drug plus acupuncture and moxibustion versus A-group, with P=0.04 in 2 (2 table chi square test. 3. In QOL change investigated by AIMS-2 questionnaire, the improvement occurred significantly more frequently in the drug plus acupuncture and moxibustion group, with difference between groups at 12 months after the initiation of clinical study at P=0.001. 4. Changes in the subjects included in AIMS-2 questionnaire : Improvement was significantly more frequent in the drug plus acupuncture and moxibustion group versus drug therapy group in respect to the ability to walk, finger function, housework, sociableness, pain, mood, and the degree of subjective improvement. In the present randomized, parallel-group, multicenter study, a significant improvement was detected in the drug plus acupuncture and moxibustion group versus the drug therapy group in the aforesaid respect, which suggested that the use of acupuncture and moxibustion combined with the conventional therapy would prevent deterioration of physical functions, improve blood circulation, stabilize mental status, and thereby contribute to the improvement of QOL in patients with rheumatoid arthritis.
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One of the complications in patients on long-term hemodialysis is spondyloarthropathy resulting from amyloidosis due to abnormal accumulation of β2-microglobulin. With deposition of β2-microglobulin in soft tissues, such as ligaments and joints, destruction of bones and cartilages begins at the site of ligament attachment and proceeds with the accompanying inflammatory reaction, fibrosis and ligament thickening. The soft tissue proliferative lesion and destruction of bones and cartilages produce spinal canal stenosis and, ultimately, compression of the spinal cord and cauda equina, to give rise to various clinical symptoms.<br>We tried acupuncture treatment on two patients with lumbar spinal canal stenosis due to hemodialysis-related spondyloarthropathy who presented with neurogenic intermittent claudication, and evaluated its effects. Acupuncture treatment involved placement of acupuncture needles chiefly in the stenotic region, once weekly, for about three months. Marked improvement was obtained regarding claudication distance and JOA score in patient number one, who had radicular type intermittent claudication. Slight improvement of claudication distance and improvement of JOA score (particularly relief of pain) were obtained in patient number two, who had mixed type intermittent claudication. These results suggest that acupuncture treatment might be effective for dialysis patients with lumbar spinal canal stenosis associated with hemodialysis-induced spondyloarthropathy.
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The effect of acupuncture treatment on ending peripheral facial nerve paralysis was examined using standard set by the Japan Society of Facial Nerve Treatment. A comparison was made of how recovery was affected by acupuncture treatment alone, drug treatment alone, and a combination of drugs (steroids) and acupuncture.<BR>As a result we found that 1) in groups having an ENoG of 41% or more, the acupuncture-only group showed less recovery than did the group that received oral steroids. 2) Among the groups having an ENoG of 21% or more, there was no significant difference between the group given oral steroids and the group given both steroids and acupuncture treatment. 3) For groups having an ENoG of 1%-20%, there was no difference in recovery between the group given large doses of injected steroids and the group given large doses of injected steroids concommitant with acupuncture. But the group that was given both oral steroids and acupuncture did not recover as well as the other groups. 4) A comparison of the groups receiving only medication and receiving medication with acupuncture showed there was no special hastening of recovery seen with the administration of acupuncture; in fact, the acupuncture may have even delayed recovery.<BR>The above results indicate that the administration of steroids is more important than the use acupuncture in the treatment of peripheral facial nerve paralysis, and that a suitable treatment should commence within 7 days after the occurrence of symptoms.
ABSTRACT
We executed an acupuncture therapy to 62 lumbar spinal canal stenosis cases who were diagnosed by CT, MRI photo state and clinical symptom and examined the result.<br>The 36 men and 26 women in this study had a mean age of 67.3 years.<br>An acupuncture was executed by aiming to give an effect to the soft tissues and a blood circulation around the area where the stenosis was recognized then pierced facet joint closely and deeply and gave an electric acupuncture stimulus.<br>14 cases were very good and 17 cases had good results according to the JOA score. No cases worsened.<br>We concluded an acupuncture treatment was effective for treating lumbar spinal canal stenosis.