scholarly journals Viability of polyamide 12 intramedullary rods coated with hydroxyapatite in experimentally induced fractures in young roosters (white Plymouth rock)

2020 ◽  
Vol 9 (7) ◽  
pp. e79973635
Author(s):  
Fernanda Gosuen Gonçalves Dias ◽  
Leonardo Lamarca de Carvalho ◽  
Luis Gustavo Gosuen Gonçalves Dias ◽  
Vitória Ferreira Nogueira de Paula Fontes ◽  
Ewaldo de Mattos Junior
Keyword(s):  
Adverse Outcomes ◽  
Radiographic Examination ◽  
Bone Fragment ◽  
Polyamide 12 ◽  
Post Surgery ◽  
Transverse Osteotomy ◽  
Stainless Steel Screws ◽  
Induced Fractures ◽  
The Right ◽  
Viability Evaluation

The present study aimed the viability evaluation of solid intramedullary rods made with polyamide 12 and coated with hydroxyapatite in experimentally osteotomized humerus of young roosters (white Plymouth rock). Sixteen animals of 45 days old each were used. After general anesthesia, they underwent to complete transverse osteotomy of the right humerus diaphysis to implant the already described rods which filled the entire length of the medullary cavity and were fixed by two cortical stainless steel screws in each bone fragment. The surgical technique was well succeeded without any trans-operative intercurrence. Through clinical and radiographic examination, it was observed that soon after the anesthesia recovery, six rods (37,5%) broke next to the fracture focus and the same was noticed with the others (62,5%) on seventh day post-surgery. Based on the obtained results, it can be hypothesized that polyamide 12 rods resistance could have been affected by all the thermal stages necessary to its incorporation with hydroxyapatite. Furthermore, the roosters’ age may also have contributed to adverse outcomes. However, future researches will be necessary to confirm those hypotheses. 

scholarly journals Applicability of polyamide 12 intramedullary locked rods in the stabilization of induced humeral fracture in cockerels (white plymouth rock) - in vivo study

2017 ◽  
Vol 69 (4) ◽  
pp. 771-776
Author(s):  
E.P. Cherobini ◽  
L.L. Carvalho ◽  
D.O. Garcia ◽  
F.G.G. Dias ◽  
C.A.S. Malta ◽  
...  
Keyword(s):  
Connective Tissue ◽  
Bone Matrix ◽  
Humeral Fracture ◽  
Rejection Reaction ◽  
Polyamide 12 ◽  
Post Surgery ◽  
Transverse Osteotomy ◽  
Bone Callus ◽  
The Right

ABSTRACT The aim of this study was to evaluate the use of polyamide 12 intramedullary rods in osteotomized humerus in cockerels (White Plymouth Rock) and analyze, by radiography and histopathology, bone consolidation and the formation of bone callus. Ten cockerels were subjected to transverse osteotomy of the right humeral diaphysis followed by the insertion of polyamide 12 locked rods, with two nails in each bone fragment. Radiographies obtained at the immediate pre and post-operative period, and every 7 days for 3 months revealed no perioperatory complications. Radiography revealed a radiopaque bone callus between the 4th and 5th week post-surgery. Histopathology detected an amphophylic material (polyamide 12 rod) in the intramedullary region and the proliferation of highly vascularized connective tissue between the rod and the cortical bone. This connective tissue was highly cellular with differentiation into osteoblasts. The collagen fibers varied from loose to dense and a differentiated bone matrix, containing osteocytes in gaps and the development of bone marrow, was also observed; indicating the formation of a bone callus without signs of implant rejection. The polyamide 12 intramedullary rod was effective in the stabilization of the fractures used in this experimental model, with no rejection reaction for at least 90 days.

scholarly journals The Repair of a Distal (one – third) Tibial Fracture in a Local Cock (Gallus gallus domesticus)

2018 ◽  
Vol 1 (1) ◽  
pp. 65-73
Author(s):  
R. O. S Okafor
Keyword(s):  
Tibial Fracture ◽  
Gallus Gallus ◽  
Fracture Repair ◽  
Gallus Domesticus ◽  
Radiographic Examination ◽  
Gallus Gallus Domesticus ◽  
Post Surgery ◽  
Intramedullary Pinning ◽  
Post Operation ◽  
The Right

A local cock(Gallus gallus domesticus) weighing 1.2 kg and kept as a pet was referred to the Veterinary Teaching Hospital (VTH), University of Abuja (UA) with the chief complaint of right limb lameness for three days. A close observation showed that the limb was dangling and had a fresh cut on the skin at the distal 1/3 of the tibia. The region was swollen and had a light-greenish colour suspected to be a sign of gangrene formation. Radiographic examination of the region confirmed a complete oblique simple fracture of the distal 1/3 of the tibia of the right limb. The cause of the fracture was unknown. Under Xylazine hydrochloride and Ketamine hydrochloride anaesthesia, the fracture was repaired through an open reduction with intramedullary pin. Eleven days post-surgery, the cock was found to bear slight weight on the limb. Clinical examination three weeks post operation showed normal usage of the limb and radiological evidence of good fracture healing. The intramedullary pinning appeared to be effective for the management of this simple tibial fracture in the local cock. This report appears to be the first intensive fracture repair documented in the local cock..

Ameloblastic Fibroma Associated With Impacted 3rd Molar: A Case Report

2017 ◽  
Vol 1 (7) ◽  
pp. 18-21
Author(s):  
K Indira Priyadarshini ◽  
Karthik Raghupathy ◽  
K V Lokesh ◽  
B Venu Naidu
Keyword(s):  
Relative Frequency ◽  
Posterior Region ◽  
Radiographic Examination ◽  
Dental Eruption ◽  
Ameloblastic Fibroma ◽  
Odontogenic Origin ◽  
The Common ◽  
The Times ◽  
The Right ◽  
Slow Growing

Ameloblastic fibroma is an uncommon mixed neoplasm of odontogenic origin with a relative frequency between 1.5 – 4.5%. It can occur either in the mandible or maxilla, but predominantly seen in the posterior region of the mandible. It occurs in the first two decades of life. Most of the times it is associated with tooth enclosure, causing a delay in eruption or altering the dental eruption sequence. The common clinical manifestation is a slow growing painless swelling and is detected during routine radiographic examination. There is controversy in the mode of treatment, whether conservative or aggressive. Here we reported a 38 year old male patient referred for evaluation of painless swelling on the right posterior region of the mandible associated with clinically missing 3rd molar. The lesion was completely enucleated under general anesthesia along with the extraction of impacted molar.

scholarly journals The effect of nano-hydroxyapatite/chitosan scaffolds on rat calvarial defects for bone regeneration

2021 ◽  
Vol 7 (1) ◽  
Author(s):  
Emmanouil Chatzipetros ◽  
Spyros Damaskos ◽  
Konstantinos I. Tosios ◽  
Panos Christopoulos ◽  
Catherine Donta ◽  
...  
Keyword(s):  
Bone Regeneration ◽  
Mean Value ◽  
Parietal Bone ◽  
Female Rats ◽  
Sprague Dawley ◽  
Post Surgery ◽  
Group A ◽  
The Mean ◽  
Group B ◽  
The Right

Abstract Background This study aims at determining the biological effect of 75/25 w/w nano-hydroxyapatite/chitosan (nHAp/CS) scaffolds on bone regeneration, in terms of fraction of bone regeneration (FBR), total number of osteocytes (Ost), and osteocyte cell density (CD), as well as its biodegradability. Methods Two critical-size defects (CSDs) were bilaterally trephined in the parietal bone of 36 adult Sprague-Dawley rats (18 males and 18 females); the left remained empty (group A), while the right CSD was filled with nHAp/CS scaffold (group B). Two female rats died postoperatively. Twelve, 11, and 11 rats were euthanized at 2, 4, and 8 weeks post-surgery, respectively. Subsequently, 34 specimens were resected containing both CSDs. Histological and histomorphometric analyses were performed to determine the FBR, calculated as [the sum of areas of newly formed bone in lateral and central regions of interest (ROIs)]/area of the original defect, as well as the Ost and the CD (Ost/mm2) in each ROI of both groups (A and B). Moreover, biodegradability of the nHAp/CS scaffolds was estimated via the surface area of the biomaterial (BmA) in the 2nd, 4th, and 8th week post-surgery. Results The FBR of group B increased significantly from 2nd to 8th week compared to group A (P = 0.009). Both the mean CD and the mean Ost values of group B increased compared to group A (P = 0.004 and P < 0.05 respectively). Moreover, the mean value of BmA decreased from 2nd to 8th week (P = 0.001). Conclusions Based on histological and histomorphometric results, we support that 75/25 w/w nHAp/CS scaffolds provide an effective space for new bone formation.

scholarly journals A stable method for 4D CT-based CFD simulation in the right ventricle of a TGA patient

2020 ◽  
Vol 35 (5) ◽  
pp. 315-324
Author(s):  
Yuri Vassilevski ◽  
Alexander Danilov ◽  
Alexander Lozovskiy ◽  
Maxim Olshanskii ◽  
Victoria Salamatova ◽  
...  
Keyword(s):  
Right Ventricle ◽  
Cfd Simulation ◽  
Fluid Motion ◽  
4D Ct ◽  
Post Surgery ◽  
Surgery Patient ◽  
Time Dependent Domain ◽  
Flow Domain ◽  
The Right ◽  
Dependent Domain

AbstractThe paper discusses a stabilization of a finite element method for the equations of fluid motion in a time-dependent domain. After experimental convergence analysis, the method is applied to simulate a blood flow in the right ventricle of a post-surgery patient with the transposition of the great arteries disorder. The flow domain is reconstructed from a sequence of 4D CT images. The corresponding segmentation and triangulation algorithms are also addressed in brief.

scholarly journals Intraocular Lens Dislocation after Cataract Surgery in Tambolaka, Southwest Sumba, Indonesia: A Case Report

2018 ◽  
Vol 9 (1) ◽  
pp. 179-184
Author(s):  
Ratna Sitompul
Keyword(s):  
Case Report ◽  
Intraocular Lens ◽  
Rural Areas ◽  
Rare Complication ◽  
Cataract Extraction ◽  
Factors Affecting ◽  
Intraocular Lens Dislocation ◽  
Post Surgery ◽  
The Right ◽  
Iol Dislocation

Intraocular lens (IOL) dislocation is a rare complication of cataract extraction requiring prompt surgery. This case report aims to raise awareness of such cases and the importance of post-surgery follow-up. A 58-year-old female patient was found with anterior IOL dislocation a week after phacoemulsification surgery in her right eye. Visual acuity of the right eye was 1/60 with ciliary injection and IOL dislocation to the anterior chamber of the right eye. The patient underwent surgery of the right eye and the IOL haptic was found to be broken. In this case report, the factors affecting IOL dislocation are axis length, broken IOL haptic, and patient activity that increased intraocular pressure. Cataract extraction surgery, although common, needs to be conducted carefully, and it is important for ophthalmologists and general practitioners to detect this condition, especially in rural areas where facilities are limited, as IOL dislocation could occur and requires immediate treatment to achieve a better result.

Adenomatoid odontogenic tumor: a report of two unusually large lesions in the mandible

2021 ◽  
Vol 156 (Supplement_1) ◽  
pp. S88-S89
Author(s):  
A Lazim ◽  
R Kuklani ◽  
D Sundararajan
Keyword(s):  
Benign Neoplasm ◽  
Surgical Excision ◽  
Odontogenic Tumor ◽  
Radiographic Examination ◽  
Adenomatoid Odontogenic Tumor ◽  
Impacted Tooth ◽  
Anterior Maxilla ◽  
Recommended Treatment ◽  
First Case ◽  
The Right

Abstract Introduction/Objective Adenomatoid odontogenic tumor (AOT) is an uncommon benign odontogenic tumor representing 3 to 7% of all odontogenic tumors. This tumor was first reported as adeno-ameloblastoma by Bernier and Tiecke in 1950 as it was initially assumed to be a type of ameloblastoma. In 1969, Philipsen and Bern proposed the term adenomatoid odontogenic tumor which was subsequently adopted by WHO and became the accepted terminology for this tumor. AOT is classified as a tumor of odontogenic epithelium but occasionally abnormal hard tissues consistent with dentinoid material may also be present as part of the tumor. AOT tends to occur in younger patients and 50% of the cases are diagnosed in teenagers. It occurs twice as commonly in females and frequently involves the anterior maxilla. Radiographically, AOT can appear as a radiolucent or mixed lucent-opaque lesion and may be associated with an impacted tooth. Methods/Case Report We report two unusually large expansile lesions of AOT that presented in the mandible. In the first case, the tumor presented as an expansile radiolucent lesion involving the right posterior mandible in a 32 year old female. In the second case, the tumor presented as an expansile mixed lucent-opaque lesion involving the left anterior mandible in a 21 year old female. The clinical presentation, radiographic and imaging findings, histopathologic features and treatment of these two cases will be discussed. The recommended treatment for AOT is surgical excision. The prognosis is good as this tumor seldom recurs after excision. Results (if a Case Study enter NA) NA Conclusion AOT is considered to be a non-aggressive, non-invasive and slow growing benign neoplasm. It is usually discovered on routine radiographic examination as the lesion is usually small and asymptomatic at the time of diagnosis but occasional cases that are larger in size have been reported in the literature.

Canine Synovial Sarcoma of the Stifle Joint with Pulmonary and Liver Metastases

2021 ◽  
Vol 38 ◽  
pp. 6-12
Author(s):  
R.J. Samson ◽  
F.H. Mpagike ◽  
A.K. Felix ◽  
A.B. Matondo ◽  
M. Makungu
Keyword(s):  
Soft Tissue ◽  
Lung Metastases ◽  
Synovial Cell ◽  
Proximal Region ◽  
Radiographic Examination ◽  
Tissue Samples ◽  
Stifle Joint ◽  
Mongrel Dog ◽  
Biopsy Examination ◽  
The Right

A seven-year-old female mongrel dog was presented at the Sokoine University of Agriculture Teaching Animal Hospital for second opinion regarding a progressive swelling of the right hind limb of two months duration. Clinical examination revealed a loss of body condition, tachypnea and tachycardia, a painful immobile solid mass of 20 cm x 14 cm x 10 cm located on the right stifle joint, leucocytosis, and anaemia. Radiographic examination of the joint revealed marked soft tissue swelling with amorphous areas of mineralization and complete destruction of the proximal tibia. Smooth and solid periosteal reaction was seen around the tibia and fibula with a Codman’s triangle. Multiple nodules and a mass with soft tissue opacity were seen in the lung fields. Post-mortem examination revealed separation of tibia and fibula, softening of the proximal parts of the tibia, and complete integration of the proximal region of the two bones and articular tissues into the surrounding muscular tissues. Multifocal nodular lesions of variable sizes were mostly found in the lungs and partly in the liver. Histologically, predominantly oval and round cells with variable nuclear sizes and moderate mitoses were observed in tissue samples from the joint, lungs and the liver although some parts of the lung metastases showed both round and spindle shaped tumor cells. Clinical profile is suggestive of aggressive biphasic (spindle and epithelial) type of synovial cell sarcoma with lung and liver metastasis. Early radiographic and biopsy examination of persistent musculoskeletal nodules is recommended for early diagnosis and interventions.

scholarly journals Extrusion of Root Canal Sealer in Periapical Tissues - Report of Two Cases with Different Treatment Management and Literature Review

2017 ◽  
Vol 21 (1) ◽  
pp. 12-18 ◽  
Author(s):  
Athina Dalopoulou ◽  
Nikolaos Economides ◽  
Vasilis Evangelidis
Keyword(s):  
Root Canal ◽  
Clinical Symptoms ◽  
Complete Healing ◽  
Radiographic Examination ◽  
Periapical Lesion ◽  
Root Canal Sealer ◽  
Treatment Management ◽  
Retrograde Filling ◽  
Root Canal Retreatment ◽  
The Right

Summary Background: Extrusion of root canal sealers may cause damage to the surrounding anatomic structures. Clinical symptoms like pain, swelling and paresthesia or anesthesia may be present. The purpose of this presentation is to describe two cases of root canal sealer penetration into periapical tissues. A different treatment management was followed in each case. Case reports: A 55 year-old man underwent root canal retreatment of the right mandibular first molar tooth due to a periapical lesion. Postoperative periapical radiographs revealed the presence of root canal sealer (AH26) beyond the apex in the distal root in proximity to the mandibular canal. The patient reported pain for the next 7 days. Radiographic examination after 1 year showed complete healing of the periapical area and a small absorption of the root canal sealer. A 42 year-old woman was referred complained of swelling and pain in the area of the right maxillary first incisor. Radiographic examination showed extrusion of root canal sealer in the periapical area associated with a periapical lesion. Surgical intervention was decided upon, which included removal of the sealer, apicoectomy of the tooth and retrograde filling with MTA. After 1 year, complete healing of the area was observed. Conclusion: In conclusion, cases of root canal sealer extrusion, surgical treatment should be decided on only in association with clinical symptoms or with radiographic evidence of increasing periapical lesion.

scholarly journals Case Report: Bow Hunter's Syndrome Caused by Compression of Extracranially Originated Posterior Inferior Cerebellar Artery

2021 ◽  
Vol 12 ◽  
Author(s):  
Noriya Enomoto ◽  
Kenji Yagi ◽  
Shunji Matsubara ◽  
Masaaki Uno
Keyword(s):  
Case Report ◽  
Posterior Inferior Cerebellar Artery ◽  
Head Rotation ◽  
Radiographic Examination ◽  
Posterior Decompression ◽  
First Case ◽  
Cerebellar Artery ◽  
Cervical Approach ◽  
The Right ◽  
Hunter's Syndrome

Bow hunter's syndrome (BHS) is most commonly caused by compression of the vertebral artery (VA). It has not been known to occur due to an extracranially originated posterior inferior cerebellar artery (PICA), the first case of which we present herein. A 71-year-old man presented with reproducible dizziness on leftward head rotation, indicative of BHS. On radiographic examination, the bilateral VAs merged into the basilar artery, and the left VA was predominant. The right PICA originated extracranially from the right VA at the atlas–axis level and ran vertically into the spinal canal. During the head rotation that induced dizziness, the right PICA was occluded, and a VA stenosis was revealed. Occlusion of the PICA was considered to be the primary cause of the dizziness. The patient underwent surgery to decompress the right PICA and VA via a posterior cervical approach. Following surgery, the patient's dizziness disappeared, and the stenotic change at the right VA and PICA improved. The PICA could be a causative artery for BHS when it originates extracranially at the atlas–axis level, and posterior decompression is an effective way to treat it.

Sign in / Sign up

Export Citation Format

Share Document