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1.
Article in English | WPRIM | ID: wpr-873898

ABSTRACT

Objective: Most cases of severe metabolic alkalosis have many causes that may result in renal failure and death. Therefore, these should be treated promptly for successful recovery.Patient: A 61-year-old man was hospitalized due to an acute kidney injury (creatinine level of 4.36 mg/dL) after a 3-month history of anorexia and recurrent vomiting. He had been treated for tuberculosis in the past.Results: Blood gas analysis revealed severe metabolic alkalosis with pH=7.66, HCO3=94 mmol/L, and pCO2=82.0 mmHg. Routine biochemical examination revealed severe hypokalemia (K 2.9 mEq/L) that was associated with prolonged QTc interval (0.52 seconds) on the electrocardiogram. Gastrofiberscopic examination also revealed severe stenosis and ulcerated scarring of the gastric pylorus and severe esophagitis. Intravenous hydration and correction of hypokalemia improved renal function and resolved metabolic alkalosis. An investigation that was repeated after 6 days revealed a creatinine level of 1.58 mg/dL, pH=7.47, HCO3=23.4 mmol/L, K=3.6 mEq/L, and QTc of 0.45 seconds. The patient underwent gastrectomy and adenocarcinoma was observed.Conclusion: We described a resolved case of severe metabolic alkalosis and acute kidney injury in a rural medical setting following conservative management.

2.
Article | WPRIM | ID: wpr-835176

ABSTRACT

Root resorption can be caused by several factors, including contact with the cortical bone. Here we report a case involving a 21-year-old female with Angle Class II, division 1 malocclusion who exhibited significant root resorption in the maxillary right central incisor after orthodontic treatment. The patient presented with significant left-sided deviation of the maxillary incisors due to lingual dislocation of the left lateral incisor and a Class II molar relationship. Cephalometric analysis demonstrated a Class I skeletal relationship (A pointnasion- B point, 2.5o) and proclined maxillary anterior teeth (upper incisor to sella-nasion plane angle, 113.4o). The primary treatment objectives were the achievement of stable occlusion with midline agreement between the maxillary and mandibular dentitions and appropriate maxillary anterior tooth axes and molar relationship. A panoramic radiograph obtained after active treatment showed significant root resorption in the maxillary right central incisor; therefore, we performed cone-beam computed tomography, which confirmed root resorption along the cortical bone around the incisive canal. The findings from this case, where different degrees of root resorption were observed despite comparable degrees of orthodontic movement in the bilateral maxillary central incisors, suggest that the incisive canal could be an inducing factor for root

3.
Article in English | WPRIM | ID: wpr-719291

ABSTRACT

In this report, we describe a case involving a 34-year-old woman who showed good treatment outcomes with long-term stability after multidisciplinary treatment for unilateral cleft lip and palate (CLP), maxillary hypoplasia, severe maxillary arch constriction, severe occlusal collapse, and gingival recession. A comprehensive treatment approach was developed with maximum consideration of strong scar constriction and gingival recession; it included minimum maxillary arch expansion, maxillary advancement by distraction osteogenesis using an internal distraction device, and mandibular setback using sagittal split ramus osteotomy. Her post-treatment records demonstrated a balanced facial profile and occlusion with improved facial symmetry. The patient's profile was dramatically improved, with reduced upper lip retrusion and lower lip protrusion as a result of the maxillary advancement and mandibular setback, respectively. Although gingival recession showed a slight increase, tooth mobility was within the normal physiological range. No tooth hyperesthesia was observed after treatment. There was negligible osseous relapse, and the occlusion remained stable after 5 years of post-treatment retention. Our findings suggest that such multidisciplinary approaches for the treatment of CLP with gingival recession and occlusal collapse help in improving occlusion and facial esthetics without the need for prostheses such as dental implants or bridges; in addition, the results show long-term post-treatment stability.


Subject(s)
Adult , Cicatrix , Cleft Lip , Constriction , Dental Implants , Esthetics , Female , Gingival Recession , Humans , Hyperesthesia , Lip , Osteogenesis, Distraction , Osteotomy, Sagittal Split Ramus , Palatal Expansion Technique , Palate , Prostheses and Implants , Recurrence , Tooth , Tooth Mobility
4.
Article in English | WPRIM | ID: wpr-716749

ABSTRACT

OBJECTIVE: The purpose of this study was to clarify the effects of continuous force application for extrusive tipping movement and occlusal interference on periapical root resorption in the rat mandibular first molar. METHODS: We constructed an appliance comprising a titanium screw implant with a cobalt-chromium post as the anchorage unit and a nickel-titanium closed coil spring (50 cN) as the active unit. Force was applied on the mandibular left first molar of rats for 8 (n = 10) and 15 days (n = 10; experimental groups), with the tooth in occlusion. Five rats were included as a non-treated control group to examine the body effect of the appliance. Active root resorption lacunae, identified using tartrate-resistant acid phosphatase, were evaluated in terms of the length, depth, and area. RESULTS: The rat mandibular first molars were mesially tipped and extruded in the occlusal direction. This mesio-occlusal tipping movement and occlusion resulted in the formation of a compression zone and active root resorption lacunae in the distoapical third of the distal roots. However, there was no significant difference in the amount of root resorption between the two experimental groups. The control group did not exhibit any active root resorption lacunae. CONCLUSIONS: Periapical root resorption was induced by continuous extrusive tipping force and occlusal interference in rat mandibular molars. These data suggest that we orthodontists had better take care not to induce occlusal interference during our orthodontic treatment.


Subject(s)
Acid Phosphatase , Animals , Molar , Orthodontists , Rats , Root Resorption , Titanium , Tooth , Tooth Movement Techniques
5.
Article in English | WPRIM | ID: wpr-714352

ABSTRACT

For patients with bimaxillary protrusion, significant retraction and intrusion of the anterior teeth are sometimes essential to improve the facial profile. However, severe root resorption of the maxillary incisors occasionally occurs after treatment because of various factors. For instance, it has been reported that approximation or invasion of the incisive canal by the anterior tooth roots during retraction may cause apical root damage. Thus, determination of the position of the maxillary incisors is key for orthodontic diagnosis and treatment planning in such cases. Cone-beam computed tomography (CBCT) may be useful for simulating the post-treatment position of the maxillary incisors and surrounding structures in order to ensure safe teeth movement. Here, we present a case of Class II malocclusion with bimaxillary protrusion, wherein apical root damage due to treatment was minimized by pretreatment evaluation of the anatomical structures and simulation of the maxillary central incisor movement using CBCT. Considerable retraction and intrusion of the maxillary incisors, which resulted in a significant improvement in the facial profile and smile, were achieved without severe root resorption. Our findings suggest that CBCT-based diagnosis and treatment simulation may facilitate safe and dynamic orthodontic tooth movement, particularly in patients requiring maximum anterior tooth retraction.


Subject(s)
Cone-Beam Computed Tomography , Diagnosis , Humans , Incisor , Malocclusion , Root Resorption , Tooth , Tooth Movement Techniques , Tooth Root
6.
Article in English | WPRIM | ID: wpr-97324

ABSTRACT

OBJECTIVE: The objective of this study is to investigate the eruption pattern and root resorption of the bovine anterior dentition in relation to growth-related parameters based on dental maturity. METHODS: A cross-sectional study was conducted on 110 bovine anterior mandibles by using standard radiography, cone-beam computed tomography (CBCT), and actual measurements. We determined the relationships between the stages of dental maturity by using a modification of Demirjian's method and various growth-related parameters, such as the activity of the root-resorbing tissue and mobility of the deciduous teeth. The correlation of growth-related parameters with interdental spacing and distal unusual root resorption (DRR) of the deciduous fourth incisor was assessed. The cause of mesial unusual root resorption (MRR) of the deciduous fourth incisor was determined on the basis of the arrangement of the permanent third incisor. RESULTS: An independent t-test and chi-square test indicated significant differences in growth-related parameters associated with dental arch length discrepancy and factors related to the shedding of deciduous teeth between the low and high dental maturity groups. The samples with interdental spacing and DRR showed a larger sum of mesiodistal permanent crown widths and higher dental maturity than did the respective controls. Samples with MRR tended to show a lingually rotated distal tip of the adjacent tooth crown. CONCLUSIONS: Dental maturity has relevance to the interdental spaces and unusual root resorption of mixed dentition. The position of the adjacent tooth crown on CBCT may be correlated with the occurrence of unusual root resorption of the incisor.


Subject(s)
Cone-Beam Computed Tomography , Cross-Sectional Studies , Crowns , Dental Arch , Dentition , Dentition, Mixed , Growth and Development , Incisor , Mandible , Methods , Radiography , Root Resorption , Tooth Crown , Tooth , Tooth, Deciduous
7.
Article in English | WPRIM | ID: wpr-97321

ABSTRACT

Assessing the condition of the alveolar bone before and after orthodontic treatment is important. Recently, cone-beam computed tomography has been widely accepted as a useful tool for orthodontic treatment. Moreover, using a three-dimensional (3D) structural analysis software enables gathering detailed information and quantifying data. The aim of this study was to introduce various quantitative analyses performed before and after orthodontic treatment by using a 3D structural analysis software for evaluating the morphological condition of the alveolar bone of a patient with gingival recession around the canines.


Subject(s)
Cone-Beam Computed Tomography , Gingival Recession , Humans
8.
Article in Japanese | WPRIM | ID: wpr-378288

ABSTRACT

<p><b>Objective</b> : We examined the utility of distal perfusion (DP) in open stent grafting (OSG) for the treatment of thoracic aortic aneurysm. <b>Methods</b> : Fifty patients who underwent OSG were categorized into two groups (the Non-DP group and the DP group) based on the presence or absence of distal perfusion in OSG. There was no statistically significant difference between the two groups with regard to patient characteristics. <b>Results</b> : There was no statistically significant difference between the two groups with regard to operation time, but, cardiopulmonary bypass time (178±22 min vs. 193±18 min ; <i>p</i> <0.01) and aortic cross clamp time (84±23 min vs. 106±19 min ; <i>p</i><0.01) were significantly longer in the DP group. Lower-body circulatory arrest time (46±11 min vs. 20±5 min ; <i>p</i><0.001) was significantly longer in the Non-DP group. Postoperative paraplegia and paraparesis occurred in one case each in the Non-DP group, whereas permanent spinal cord ischemia did not occur in the DP group. Postoperative intubation time (72.6±40.1 h vs. 40.1±34.7 h ; <i>p</i><0.05) was significantly longer in the Non-DP group. There were two in-hospital deaths due to stroke and respiratory failure in the Non-DP group, and one in-hospital death due to respiratory failure in the DP group. The postoperative maximum value of BUN (38.5±15.6 mg/dl vs. 30.8±9.8 mg/dl ; <i>p</i><0.05) and s-Cr (1.9±1.0 mg/dl vs. 1.3±0.4 mg/dl ; <i>p</i><0.01) were significantly higher in the Non-DP group. <b>Conclusion</b> : DP in OSG was an effective method for prevention of spinal cord ischemia, and for protection of respiratory and renal function.</p>

9.
Article in Japanese | WPRIM | ID: wpr-375450

ABSTRACT

Recoarctation, systemic hypertension, aortic aneurysm and intracranial aneurysm are generally observed within a certain period after the surgical procedure for aortic coarctation, which is known as a systemic diseases caused by not only morphological abnormalities but also arterial functional abnormalities of artery. Here, we report a case who showed complications of recoarctation, hypertension and subarachnoid hemorrhage after surgery for aortic coarctation. A 17-year-old boy originally presented to our hospital with upper extremity systemic hypertension. Recoarctation after surgery for aortic coarctation was diagnosed in his childhood, following which hypertension was followed while he received continuous treatment with anti-hypertensive drugs. He was hospitalized with sudden headache and loss of consciousness. Since subarachnoid hemorrhage was diagnosed by computed tomography, clipping of intracranial aneurysms was performed. After the clipping procedure, he underwent percutaneous intravascular stenting angioplasty. However, the pressure gradient remained and sufficient dilatation was not obtained because of the hypoplastic anatomical distal aortic arch (from the left internal carotid artery to the site of recoarctation) due to the development of collateral circulation with rib notch. At age 21, extra-anatomical bypass (from the ascending aorta to the descending aorta) was performed because of persistent upper extremity systemic hypertension. However, systemic hypertension continued to require antihypertensive medication.

10.
Article in English | WPRIM | ID: wpr-206380

ABSTRACT

OBJECTIVE: To three-dimensionally elucidate the effects of occlusal hypofunction on the periodontal ligament and alveolar bone proper of rat molars by micro-computed tomography (micro-CT). METHODS: Occlusal function in the molar area was restricted by attaching an anterior bite plate on the maxillary incisors and a metal cap on the mandibular incisors of 5-week-old male Wistar rats for 1 week. The periodontal ligament space and alveolar bone proper around roots of the mandibular first molar were assessed by histology and micro-CT. RESULTS: The periodontal ligament space was narrower and the alveolar bone proper was sparser and less continuous in the hypofunction group than in the control group. Further, both the volume of the periodontal ligament and the volumetric ratio of the alveolar bone proper to the total tissue in the region of interest were significantly lower in the hypofunction group (p < 0.05). CONCLUSIONS: Occlusal hypofunction induces atrophic changes in the periodontal ligament and alveolar bone proper of rat molars.


Subject(s)
Animals , Humans , Incisor , Male , Molar , Periodontal Ligament , Rats , Rats, Wistar
11.
Article in English | WPRIM | ID: wpr-374244

ABSTRACT

Hamstring muscles form a multi-articular muscle group that crosses the hip and knee joints. It has been said that the imbalance in the hamstrings:quadriceps strength ratio (H:Q ratio) due to weaker hamstring muscles results in an increased susceptibility to hamstring strains and anterior cruciate ligament injuries. Four different hamstrings trainings, Hip Lift (HL), Single-leg Deadlift (DL), Leg Curl (LC), and Nordic Hamstrings (NH), were conducted and compared in the effect on conventional H:Q ratio. After the training of two months, significant increase of hip extension torque and H:Q ratios in the hip joint were found in the DL group, and significant increase of knee flexion torque and H:Q ratios in the knee joint were found in the LC group (<i>P</i> < 0.05). As a conclusion, DL and LC training could be practical for hamstrings injury prevention.

12.
Article in Japanese | WPRIM | ID: wpr-374212

ABSTRACT

The primary purpose of this study was to investigate whether the baseball pitchers have asymmetric characteristics of muscle thickness (MT) in upper extremities, trunk, and lower extremities because of repetitive pitching. The secondary purpose of this study was to investigate the relationship between MT and ball speed. Twenty-six college baseball pitchers participated in this study. Twenty-six sites were selected to quantify the asymmetric characteristics of MT. The MT was measured by a B-mode ultrasound. The ball speed, measured by a radar gun, was used to quantify the pitching performance. The MT of forearm, subscapula, and chest in dominant side (pitching side) were significantly greater than those in nondominant side, and the MT of abdomen, lateral abdomen, and anterior thigh in nondominant side were significantly greater than those in dominant side. On the other hand, the MT of forearm in both sides and the MT of lateral abdomen in dominant side were significantly and positively correlated with ball speed. These results suggest that asymmetric muscle thickness in upper extremity, trunk, and lower extremity in baseball pitchers resulted from repetitive pitching, and the MT of forearm and lateral abdomen are related to the ball speed.

13.
Article in Japanese | WPRIM | ID: wpr-362111

ABSTRACT

We reporte the initial results of open stent-grafting (OSG) applied with a Matsui-Kitamura (MK) stent in the treatment of thoracic aortic aneurysm (TAA). From August 2005 to March 2011, OSG for TAA was applied in 35 cases (male/female, 29/6, 58∼86 years old, mean age 71). During deep hypothermic circulatory arrest with antegrade selective cerebral perfusion, the stent graft was delivered through the transected proximal aortic arch, followed by arch replacement with a 4-branched prosthesis. Concomitant procedures included 1 coronary artery bypass graft, 1 mitral valve replacement and 2 pacemaker implantations. Operative mortality within 30 days was 5.7% (respiratory failure in 1 and ischemic enteritis in 1). There was 1 in-hospital death due to brain stem infarction. Perioperative morbidity included 2 (5.7%) stroke, 5 (14.3%) spinal cord injuries (paraplegia in 1, paraparesis in 1 and transient paraparesis in 3) , and 1 (2.9%) temporary hemodialysis. Ten patients (28.6%) were intubated for more than 72 h. There was no complication with the graft-related incident. These initial results suggested the OSG method applied with a MK stent is a useful surgical procedure for the treatment of TAA.

14.
Article in English | WPRIM | ID: wpr-358382

ABSTRACT

<p><b>OBJECTIVES</b>The aim of this study was to determine the prevalence of Echinococcus multilocularis environmental contamination in an urban fringe-the Nopporo forest park of Sapporo city, Hokkaido, Japan. A secondary aim was to determine possible transmission risks areas by associating percentage occurrence of E. multilocularis-positive faeces with the different land-use classes.</p><p><b>METHODS</b>Wild fox faeces collected from the environment were examined by intravital methods, such as the taeniid egg sucrose floatation technique, E. multilocularis coproantigen enzyme-linked immunosorbent analysis and DNA test of taeniid eggs by PCR. Geospatial maps produced by the Global Positioning System and Landsat data were analysed using geographic information system software to determine the association between percentage occurrences of E. multilocularis-positive fox faeces and land-use classes.</p><p><b>RESULTS</b>Our findings showed high prevalence rates in both E. multilocularis egg and coproantigen-positive faeces (16 and 49%, respectively) in the investigated urban fringe forest park. Data revealed that percentage occurrence of E. multilocularis-positive fox faeces was associated with land-use classes, such as forest and open field (P < 0.05).</p><p><b>CONCLUSIONS</b>We conclude that Nopporo forest park in the urban fringe of Sapporo city, Hokkaido is a reservoir with a high prevalence of zoonotic infective agents for alveolar echinococcosis. Our findings suggest that interface habitats between forests or woodlands and open fields are indispensable for continued maintenance of the life-cycle of E. multilocularis and, as such, constitute high risk areas for echinococcosis transmission.</p>

15.
Article in Japanese | WPRIM | ID: wpr-361851

ABSTRACT

We here report two cases of successfully treated secondary aorto or iliac arterial-enteric fistula after graft replacement for abdominal aortic aneurysm. Case 1: A 80-year-old man who complained massive anal bleeding had undergone Y-shaped graft replacement for abdominal aortic aneurysm 22 years previously. Computed tomography demonstrated an aneurysm and hematoma formation at the anastomosis of the right graft limb and the right common iliac artery. Preoperative angiography showed no leak of contrast medium at the distal anastomosis of the right graft limb. A presumptive diagnosis of secondary iliac arterial enteric fistula was made, therefore, we performed an emergency operation. Extra-anatomic bypass preceded the removal of the right graft limb, partial resection and direct reconstruction of the ileum by the retroperitoneal approach. His postoperative course was uneventful and he was discharged on the 19th postoperative day. Case 2: A 77-year-old man who had received Y-shaped graft replacement of an abdominal aortic aneurysm 9 years previously was transferred to our hospital because of sudden onset epigastralgia and massive hematemesis. Gastroduodenoscopy revealed a fresh blood clot in the third portion of the duodenum where it was compressed by for surrounding pulsatile environment. An emergency computed tomography showed aneurysm formation without extravasation of contrast medium in the duodenum at the proximal anastomosis of the prosthetic graft. A secondary aortoenteric fistula was highly suspected and emergency operation was performed. Extra-anatomic bypass preceded the removal of the graft body, infrarenal aortic stump closure, duodenal closure and the greater omentum was used to fill defects. He underwent successful staged abdominal wall closure due to bowel edema making primary closure impossible. His postoperative course was uneventful and he was discharged on the 26th postoperative day.

16.
Article in Japanese | WPRIM | ID: wpr-361812

ABSTRACT

A 79-year-old man was transferred to our hospital because of massive hematemesis. Contrast-enhanced CT scan demonstrated extravasation of contrast medium into the jejunum. Therefore, we diagnosed primary aortoenteric fistula and performed an emergency operation. At surgical exploration, the jejunum was closely adherent to the normal-sized aorta. The fistula was present between the anterior wall of the aorta and the jejunum. Operative reconstruction was performed with <i>in-situ</i> grafting and a pedicled omentum flap was placed around the graft. The postoperative course was uneventful, and there has been no evidence of infection during the follow-up period of 1 year.

17.
Article in Japanese | WPRIM | ID: wpr-361800

ABSTRACT

Positron emission tomography (PET) is an established imaging tool in oncology that has also been used in infectious and inflammatory diseases. PET combined with computed tomography (PET/CT) can be used to visualize metabolic activity with precise localization. We report an infant with late presentation of poststernotomy mediastinitis, the diagnosis and localization of which was confirmed by PET/CT. An 8-month old infant, who had undergone the Jatene procedure and right ventricle outflow reconstruction 6 months prior, was admitted for inflammation surrounding the superior aspect of the healed scar. Cultures from the wound grew methicillin-resistant <i>Staphylococcus aureus</i> (MRSA). Although the only symptom was discharge from the wound, and there were no other signs or symptoms suggestive of severe general infection, substernal abscess was suspected by magnetic resonance imaging. Since PET/CT revealed high accumulation of 18-fluorodeoxyglucose at the substernal region, the diagnosis of MRSA mediastinitis was made, which was confirmed by subsequent surgical treatment.

18.
Article in Japanese | WPRIM | ID: wpr-367276

ABSTRACT

A 54-year-old man, involved in a motor vehicle collision, was transferred to our hospital. He was hemodynamically stable. A CT scan of the chest demonstrated traumatic aortic dissection and a mediastinal hematoma with hemothorax of left side. Endovascular aortic repair using a homemade device was immediately performed, and a completion angiogram revealed complete exclusion of the aortic injury, with no extravasation. A postoperative CT scan revealed satisfactory placement of the endograft, with no extravasation. The patient was discharged on the 13th postoperative day. Endovascular aortic repair was useful and minimally invasive therapy in this case for the treatment of traumatic thoracic aortic rupture.

19.
Article in Japanese | WPRIM | ID: wpr-367174

ABSTRACT

We report a rare case of acute type A aortic dissection with paraplegia which was reversed using cerebrospinal fluid drainage (CFD). The patient was a 80-year-old man who was admitted with acute back pain and paraplegia. Computed tomographic scans showed an acute type A aortic dissection. Four hours after onset of paraplegia, CFD was initiated by inserting an intrathecal catheter at L3-L4. Cerebrospinal fluid was drained freely by gravity whenever the pressure exceeded 10cmH<sub>2</sub>O. After 32h, the neurological deficit was completely resolved. CFD can be considered a useful treatment in patients with paraplegia after acute aortic dissection.

20.
Article in Chinese | WPRIM | ID: wpr-239092

ABSTRACT

<p><b>OBJECTIVE</b>To examine adaptive changes in the shape of the upper airway during titrated mandibular advancement. Furthermore, to understand the mechanism of mandible-adjustable therapy to improve the ventilation.</p><p><b>METHODS</b>Fourteen non-apnea participated in the study. A custom-made oral device was used to keep the mandible in titrated advancement at 0% (F0), 50% (F50), 75% (F75), 100% (F100) of the maximum advancement. Magnetic resonance imaging was used to investigate the difference in the shape of upper-airway in these 4 positions. Changes in the anteroposterior direction (AP), lateral direction (Lat) and its ratio (AP/Lat) were calculated, which were transformed into the percentage of the original ones.</p><p><b>RESULTS</b>The dose-dependent decrease of AP/Lat was found when the mandible was advanced (P = 0.0001). Lateral change rate in percentage increased by degrees (P = 0.0023), while the increase of anteroposterior change rate in percentage showed no statistical significance.</p><p><b>CONCLUSION</b>The shape of upper airway tended to be less round. The enlargement of upper airway during titrated mandibular advancement was mainly the result of enlargement in lateral direction.</p>


Subject(s)
Asians , Humans , Magnetic Resonance Imaging , Male , Mandible , Mandibular Advancement , Palate, Soft , Pharynx
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