Effects of surgery with the YESS technique on lumbar range of motion and limb function in patients with lumbar disc herniation / 中国基层医药

Objective:To investigate the effects of surgery with the Yeung endoscopic spine system (YESS) technique on lumbar range of motion and limb function in patients with lumbar disc herniation.Methods:A total of 148 patients with lumbar intervertebral disc herniation admitted to Liaocheng Second Hospital Affiliated to Shandong First Medical University from April 2018 to April 2021 were included in this study. They were randomly divided into control and observation groups ( n = 74/group). The control group was treated with laminectomy, and the observation group was treated with an intervertebral foramen mirror YESS. The lumbar range of motion, Oswestry disability index score, and incidence of surgical complications were compared between the two groups. Results:At postoperative 7 days, ranges of motion in lumbar flexion, lumbar extension, left lumbar lateral flexion, and right lumbar lateral flexion in the observation group were (87.45 ± 7.38)°, (26.87 ± 3.41)°, (28.58 ± 3.41)°, (28.39 ± 3.41)°, which were significantly higher than (68.98 ± 6.51)°, (15.69 ± 3.23)°, (18.69 ± 2.32)°, (14.56 ± 2.96)° in the control group ( t = 16.15, 20.48, 20.63, 26.35, all P < 0.001). At postoperative 7 days, the Oswestry Disability Index in each group was significantly decreased compared with before treatment (both P < 0.05). At postoperative 7 days, the score of each dimension of the Oswestry Disability Index in the observation group was significantly lower compared with the control group ( t = 49.13, 50.20, 54.78, 37.79, 32.04, 36.68, 43.69, 28.92, 39.31, 64.12, all P < 0.001). There were no significant differences in the incidences of perioperative incision infection, nerve injury, cerebrospinal fluid leaks, lumbar spondylolisthesis, and foot drop between the two groups (all P > 0.05). Conclusion:Treatment of lumbar intervertebral disc herniation with the YESS technique is helpful to improve lumbar mobility and reduce lumbar dysfunction and is highly safe.

Causes of asymptomatic side limb pain after minimally invasive transforaminal lumbar interbody fusion / 中国骨伤

OBJECTIVE@#To investigate possible causes and preventive measures for asymptomatic pain in the limbs after minimally invasive transforaminal lumbar interbody fusion(MIS-TLIF).@*METHODS@#Clinical data from 50 patients with lumbar degenerative disease who underwent MIS-TLIF between January 2019 and September 2020 were retrospectively analyzed. The group included 29 males and 21 females aged from 33 to 72 years old, with an average age of (65.3±7.13) years. Twenty-two patients underwent unilateral decompression, and 28 underwent bilateral decompression. The side(ipsilateral or contralateral) and site(low back, hip, or leg) of the pain were recorded before surgery, 3 days after surgery, and 3 months after surgery. The pain degree was evaluated using the visual analogue scale(VAS) at each time point. The patients were further grouped based on whether contralateral pain occurred postoperatively (8 cases in the contralateral pain group and 42 in the no contralateral pain group), and the causes and preventive measures of pain were analyzed.@*RESULTS@#All surgeries were successful, and the patients were followed up for at least 3 months. Preoperative pain on the symptomatic side improved significantly, with the VAS score decreasing from (7.00±1.79) points preoperatively to (3.38±1.32) points at 3 days postoperatively and (3.98±1.17) points at 3 months postoperatively. Postoperative asymptomatic side pain (contralateral pain) occurred in 8 patients within 3 days after surgery, accounting for 16% (8/50) of the group. The sites of contralateral pain included the lumbar area (1 case), hip(6 cases), and leg (1 case). The contralateral pain was significantly relieved 3 months after surgery.@*CONCLUSION@#More cases of contralateral limb pain occur after unilateral decompression MIS-TLIF, and the reason may include contralateral foramen stenosis, compression of medial branches, and other factors. To reduce this complication, the following procedures are recommended: restoring intervertebral height, inserting a transverse cage, and withdrawing screws minimally.

The theory of emphasizing both muscles and bones in the treatment of lumbar intervertebral disc herniation / 国际中医中药杂志

The theory of "equal stress on bones and muscles" emphasizes that "the tendons bind to the bones, the bones are stretched, the bones are connected, and the bones are fractured. The relationship between bone and soft tissues are important, which is the law of Traditional Chinese Medicine in the treatment of orthopedic diseases. For patients with lumbar disc herniation, the percutaneous intervertebral foraminal technology remodels the disordered internal biological balance of the spine under pathological conditions. Among them, two common clinical minimally invasive approaches under endoscopy are paid attention to soft tissue protection, and active and appropriate functional exercises after surgery, which have become a typical manifestation of the theory of "equal stress on bones and muscles" in modern spinal orthopedic surgery.

Short-term clinical observation on the treatment of single-segment lumbar disc herniation and lumbar spinal stenosis by improved transforaminal endoscopic spine system technique with full visual endoscopic foraminoplasty / 中国综合临床

Objective:To investigate the safety and efficacy of the modified transcutaneous endoscopic spine system (TESSYS) with full visual foramen plasty and percutaneous endoscopic discectomy (PTED) in the treatment of lumbar disc herniation and lumbar spinal stenosis.Methods:A case-control study was conducted to analyze the clinical data of 68 patients with single segment lumbar disc herniation and lumbar spinal stenosis treated with visual endoscopic foraminal plasty and modified TESSYS technique and intervertebral foraminal fusion from April 2020 to March 2021. According to the operation method, 38 cases were divided into two groups: pted group (38 cases) and TLIF group (30 cases). Independent sample t-test was used to compare the incision length, bleeding volume, operation time, time to go down and hospital stay between the two groups. Visual analog scale (VAS) scores and Oswestry disability index (ODI) scores were measured repeatedly. The differences between preoperative and postoperative 7 days and 1, 3, 6 months were analyzed and compared by generalized estimation equation. Rank sum test was performed in combination with the modified MacNab standard in the last follow-up. The excellent and good rate was compared between groups χ 2. Test and evaluate the curative effect. Results:The postoperative follow-up was 8.5-14.0 months. The incision length (1.25±0.33) cm, operation time (119.45±14.95), blood loss (24.03±8.62) mL, downtime time (1.42±0.50) d, and hospital stay (3.39±0.55) d in the PTED group were all higher than those in the TLIF group ((14.37±2.91) cm, (140.53±16.16) min, (158.00±51.35) mL, (3.20±0.96) d, (7.33±0.55) d) had obvious advantages ( t values were 24.56, 5.57, 14.13, 9.20, and 29.48, respectively; all P<0.001). The VAS scores and ODI scores of the two groups after operation were significantly improved compared with those before operation (all P<0.001), and with the passage of time, the VAS scores and ODI scores of the two groups of patients from 7 days to 6 months after operation by month were significantly decreased ( P<0.001). However, there was no significant difference between the two groups in VAS score from 1 week to 6 months after operation: P7d=0.997, P1 month=0.139, P3 month=0.057, P6 month=0.539, all P>0.05. There was no significant difference in ODI scores between time points (ODI: P7d=0.278, P1 month=0.442, P3 month=0.963, P6 month=0.278, all P>0.05). There was no significant difference between the two groups in terms of clinical efficacy and excellent and good rate evaluated by modified MacNab criteria at the last follow-up ( Z=0.09, P=0.927; χ 2=0.92, P=0.761). Conclusion:The short-term curative effect of full visual endoscopic foraminal plasty and modified TESSYS technique in the treatment of single level lumbar disc herniation and lumbar spinal stenosis is close to that of classical foraminal interbody fusion, and has certain advantages.

Alargamento do forame como complemento no tratamento endodôntico para regeneração de uma lesão periapical extensa: relato de caso / Foraminal enlargement as a complement in the endodontic treatment for the regeneration of an extensive periapical lesion. A case report

Introdução: O alargamento do forame refere-se ao alargamento mecânico intencional do forame para reduzir a carga bacteriana em uma área afetada frequentemente por infecções endodônticas além do limite da constrição apical. Objetivo: O objetivo do presente relato de caso é apresentar a técnica de alargamento do forame de um dente com lesão periapical extensa, como complemento do tratamento endodôntico e alternativa precoce à microcirurgia periapical. Métodos: É apresentado o caso de um incisivo lateral superior endodonticamente tratado, com uma extensa lesão periapical associada. Devido à história clínica e radiográfica, tempo decorrido desde o tratamento endodôntico inicial e alta probabilidade de áreas de reabsorção apical com biofilme extrarradicular, o retratamento endodôntico com alargamento do forame foi indicado como primeira opção, adiando a indicação de cirurgia endodôntica de acordo com a evolução. Resultados: Na avaliação de acompanhamento de dois anos, por exame de imagem, observou-se evolução clínica favorável ao retratamento, com aumento total da densidade óssea. O procedimento cirúrgico endodôntico complementar foi descartado. Conclusão: O alargamento do forame é uma alternativa complementar viável em casos de periodontite apical de longa duração com suspeita de biofilme no nível do forame. Pode ser considerado uma opção antes da indicação de retratamento endodôntico cirúrgico (AU).

Introduction: Foraminal enlargement refers to intentional mechanical enlargement of the foramen to reduce the bacterial load in an area frequently affected by endodontic infections beyond the limits of the apical constriction. The objective of this case report is to present the foraminal enlargement technique of a tooth with an extensive periapical lesion as a complement in the endodontic treatment and an early alternative to periapical microsurgery. Materials and methods: The case is presented of an endodontically treated upper lateral incisor with an extensive associated periapical lesion. Due to the clinical and radiographic history, the time elapsed since the initial endodontic treatment, and the high probability of areas of apical resorption with extra-radicular biofilm, endodontic retreatment with foraminal enlargement was indicated as the first option, postponing the indication for endodontic surgery according to evolution. Results: In the follow-up appointment at 2 years, a favorable clinical imaging evolution of retreatment was observed, with a total increase in bone density. The complementary endodontic surgical procedure was discarded. Conclusion: Foraminal enlargement is a viable complementary alternative in cases of long-term apical periodontitis with suspicion of biofilm at the foramen level. It can be considered an option before the indication of surgical endodontic retreatment (AU).

Instrumentação foraminal: repercussões locais e sistêmicas / Foraminal enlargement: Local and systemic repercussions

Introdução: A infecção endodôntica pode alcançar a saída foraminal e, inclusive, ir além dela. Logo, a determinação da constrição apical como o limite ideal para instrumentação e obturação tem sido questionada. A instrumentação foraminal intencional é realizada com o intuito de diminuir o contingente microbiano a níveis mais favoráveis ao reparo. Entretanto, repercussões locais e sistêmicas estão associadas à sua execução. Objetivo: Realizar uma revisão crítica da literatura sobre repercussões locais e sistêmicas relativas à instrumentação foraminal intencional. Métodos: Em março de 2018, uma busca eletrônica realizada na base de dados PUBMED utilizando os termos "foraminal enlargement" OR "foraminal widening" OR "apical limit" AND "endodontics" identificou 74 artigos científicos. Esses artigos, a análise de suas referências bibliográficas e a utilização de mais 5 artigos base resultaram nos 111 estudos consultados para a realização dessa pesquisa. Resultados: A ampliação foraminal intencional nem sempre pode ser praticada em virtude de razões anatômicas e morfológicas. Quanto maior a ampliação do forame apical, maior a possibilidade de extravasamento de substâncias e/ou materiais utilizados para a realização do tratamento endodôntico. A instrumentação foraminal intencional parece ser contraindicada em pacientes que fazem ou fizeram uso de bisfosfonatos recentemente, com distúrbios de coagulação e/ou sob uso crônico de anticoagulantes e com alto risco de bacteremia. Conclusões: Os impactos da instrumentação foraminal intencional sobre o sucesso do tratamento endodôntico devem ser investigados. Contudo, os delineamentos metodológicos dos estudos clínicos devem ser cuidadosos, principalmente no tocante às condições sistêmicas dos pacientes que farão parte do universo amostral (AU).

Introduction: endodontic infection can reach and even go beyond the apical foramen. Therefore, determining apical constriction as the ideal limit for instrumentation and obturation has been questioned. Intentional foraminal enlargement is performed for the purpose of reducing the microbial contingent to levels more favorable to repair. However, local and systemic repercussions have been associated with this approach. Objectives: to critically review the literature on local and systemic repercussions relative to intentional foraminal enlargement. Methods: in March 2018, an electronic search performed on the PUBMED database using the terms "foraminal enlargement" OR "foraminal widening" OR "apical limit" AND "endodontics" identified 74 scientific articles. These articles, analysis of their references and use of another 5 base articles resulted in the 115 studies used for performing this research. Results: intentional foraminal enlargement cannot always be performed due to the anatomical and morphological conditions. The greater the apical foramen enlargement, the greater the possibility of extrusion of substances and/or materials used to perform endodontic treatment. Intentional foraminal enlargement seems to be contraindicated in patients who are taking or have recently used bisphosphonates, those with coagulation disorders and/ or under chronic use of anticoagulants and at high risk for bacteremia. Conclusions: the impacts of intentional foraminal enlargement on the success of endodontic treatment should be investigated. However, the methodological procedures of clinical studies should be carefully designed, especially taking into consideration the systemic conditions of patients who will be part of the sample (AU).

Odontometria eletrônica em Endodontia: quando e como fazer o melhor uso dos localizadores eletrônicos foraminais / Electronic foramen locators: when and how to use them

Novas tecnologias vêm sendo incorporadas aos protocolos endodônticos com o intuito de facilitar ou tornar mais eficiente a atuação dos profissionais que os executam. Nessa perspectiva, os localizadores eletrônicos foraminais (LEFs) apresentam-se como ferramentas quase indispensáveis para uma correta determinação do comprimento real dos condutos. Por sua vez, essa etapa reveste-se de vital importância para que os procedimentos endodônticos sejam mais precisos e limitem-se às extensões desejadas pelo endodontista, sem delegá-las ao acaso ou a variações anatômicas na relação entre os forames apicais (FA) e os vértices radio- gráficos. Objetivo: O objetivo do presente artigo é discorrer sobre os protocolos de emprego dos LEFs e a influência que algumas condições clínicas podem exercer na precisão desses dispositivos. Resultados: Tomando por base a evidência científica disponível, aspectos como o ajuste do instrumento e a relação desse com o preparo cervical, o limite apical de penetração e a sequência de emprego do LEF, assim como a condição foraminal, parecem interferir significativamente nos valores de precisão observados. Conclusões: Torna-se evidente que o conhecimento do funcionamento dos localizadores e sua relação com as diversas situações clínicas per- mite utilizá-los de maneira mais efetiva, incrementando sua precisão e extraindo do equipamento, qualquer que seja, um melhor resultado, favorecendo a correta obtenção do comprimento do canal radicular, assim colaborando para a realização de uma Endodontia mais previsível e de qualidade (AU).

Novas tecnologias vêm sendo incorporadas aos protocolos endodônticos com o intuito de facilitar ou tornar mais eficiente a atuação dos profissionais que os executam. Nessa perspectiva, os localizadores eletrônicos fora- minais (LEFs) apresentam-se como ferramentas quase indis- pensáveis para uma correta determinação do comprimento real dos condutos. Por sua vez, essa etapa reveste-se de vital importância para que os procedimentos endodônticos sejam mais precisos e limitem-se às extensões desejadas pelo endodontista, sem delegá-las ao acaso ou a variações anatômicas na relação entre os forames apicais (FA) e os vértices radio- gráficos. Objetivo: O objetivo do presente artigo é discorrer sobre os protocolos de emprego dos LEFs e a influência que algumas condições clínicas podem exercer na precisão desses dispositivos. Resultados: Tomando por base a evidência científica disponível, aspectos como o ajuste do instrumento e a relação desse com o preparo cervical, o limite apical de penetração e a sequência de emprego do LEF, assim como a condição foraminal, parecem interferir significativamente nos valores de precisão observados. Conclusões: Torna-se evidente que o conhecimento do funcionamento dos localizadores e sua relação com as diversas situações clínicas per- mite utilizá-los de maneira mais efetiva, incrementando sua precisão e extraindo do equipamento, qualquer que seja, um melhor resultado, favorecendo a correta obtenção do comprimento do canal radicular, assim colaborando para a realização de uma Endodontia mais previsível e de qualidade(AU).

3D Printer Application for Endoscope-Assisted Spine Surgery Instrument Development: From Prototype Instruments to Patient-Specific 3D Models

Research progress in minimally invasive treatment of cervical nerve root canal stenosis under total endoscope / 中国修复重建外科杂志

Objective: To review the research progress of total endoscopic minimally invasive technique in treating cervical nerve root canal stenosis (CNRCS). Methods: The related literature at home and abroad was extensively reviewed. The research history, current situation, research progress, advantages and disadvantages of minimally invasive treatment of CNRCS under total endoscope were summarized. Results: In recent years, with the continuous development of minimally invasive technique of total endoscope in spine surgery, the surgical treatment methods are also constantly innovated. Compared with the traditional open surgery, minimally invasive treatment of CNRCS under total endoscope can obtain better effectiveness, keep the stability of the cervical segment to the maximum extent, reduce the impact on the activity of the cervical spine and the occurrence of related surgical complications, which is an effective minimally invasive technology. Conclusion: The minimally invasive treatment of CNRCS under total endoscope has achieved some results, which is expected to be one of the indispensable means to treat CNRCS, but it still needs to be improved.

Valoración de la lordosis lumbar y diámetro foraminal utilizando el Soporte de Cirugía Espinal / Evaluation of lumbar lordosis and foraminal diameter using a Spinal Surgery Table

Introducción Tenemos como objetivo, cuantificar los cambios de la lordosis fisiológica en las distintas posiciones, de pie y en decúbito ventral, sobre el Soporte de Cirugía Espinal (SCE) y evaluar indirectamente los cambios de diámetro de los distintos forámenes, midiendo la distancia interpedicular. Materiales y métodos 20 pacientes de 20 a 40 años. Se tomaron radiografías, en posición de pie y sobre el SCE. Se midió la lordosis lumbar en radiografías de pié, y sobre el SCE en dos posiciones (baja/alta) así como la distancia interpedicular de los forámenes de cada segmento. Resultados Se constata una pérdida de la lordosis en la primera posición de 21,65° (37,00%) y en la segunda posición de 28,75° (49,14%). Encontramos un aumento de la distancia interpedicular en todos los niveles tanto en la posición baja como alta del SCE. Los forámenes que presentaron mayor apertura fueron los segmentos de L4-L5, seguidos por L5-S1. Conclusiones Se encontró una pérdida promedio de la lordosis fisiológica del 37,00% y del 49,14% con la utilización del SCE en las dos posiciones utilizadas. En todos los casos existió un aumento de la distancia interpedicular, que vario entre un 10 y un 15%. Los forámenes que mayor apertura presentaron en las distintas posiciones fueron los segmentos L4-L5 seguido por L5-S1. La cifotización de los segmentos móviles permitirían una mejor liberación sacorradicular al aumentar el diámetro del canal y los forámenes. Nivel de Evidencia: IV

Background The aim of this study is to quantify the changes of the physiological lordosis in the different positions, standing and in ventral decubitus, on a Spinal Surgery Table (SST), and indirectly evaluate the changes in diameter of the different foramina, and measuring the interpedicular distance. Methods The study included 20 patients from 20 to 40 years old. X-rays were taken in standing position and on the SST. Lumbar lordosis was measured using the X-rays in the standing position, and on the SST in two positions (low/high), as well as the interpedicular distance of the foramina of each segment. Results A loss of lordosis was found in the first position of 22.65° (37.00%) and in the second position of 28.75° (49.14%). An increase was found in the interpedicular distance at all levels in both the low and high position of the SST. The foramina with the greatest opening were the L4-L5 segments, followed by L5-S1. Discussion A mean loss of 37.00% and 49.14%, respectively, was found in the physiological lordosis with the use the SST in the two positions used. In all cases there was an increase in the interpedicular distance, which varied between 10% and 15%. The foramina with the greatest openness in the different positions were segments L4-L5 followed by L5-S1. The kyphotisation of the mobile segments would allow a better sacrum-radicular release when increasing the diameter of the channel and the foramina. Evidence Level: IV

​A Morphological Study of Position of Nutrient Foramen in Dry Human Femur

Aim: The aim of the study is to determine the variations in diaphyseal nutrient foramen(NF) of femur with respect to theirnumber, location, direction and size in Jharkhand state population.Materials and Methods: 70 dry adult femora(38 Right side and 32 Left side) were collected from the department of Anatomy,Mahatma Gandhi Memorial Medical College, Jamshedpur, Jharkhand. Femora were examined for mean length of femur, number,position including foraminal index, direction and size of nutrient foramina.Result:- Mean length of femur was 42.27cm. According to Foraminal Index the location of nutrient foramina were 72.34% inright side and 86.84% were located in left side in middle 1/3 of bone. Most common position was between two lips of Lineaaspera(42.35%). Single nutrient foramen was 64.70%.Conclusion:- The knowledge of anatomical variation in diaphyseal nutrient foramen of femur is important for bone ossification,bonehealing and it also give additional information to orthopedicians for microvascular bone grafting.

A Study On Variations Of Nutrient Foramen Of Humerus With Its Clinical Implications

Background: Nutrient foramen is an opening into shaft of humerus which gives passage to the blood vessels ofmedullary cavity. The knowledge of nutrient foramen is important in surgical procedures like bone grafting andmore recently in microsurgical vascularized bone transplantation. Lack of an adequate vascular supply cansignificantly delay or prevent fracture healing. Nutrient artery is the major source of blood supply to the longbone and hence plays an important role in fracture healing.Objective: The nutrient foramens obey the rule of ossification, that is directed away from the growing end of thebone or not.Materials and Methods: The present study consisted of 68 (34 right and 34 left) dried humeurus excluding anyfracture or pathological abnormalities. Number and direction of nutrient foramen was observed in each humerus.Location of nutrient foramen in relation with surfaces and zones of humeurus was determined.Result: It has been observed that 94.12% of the humerus had a single nutrient foramen, 6.39% double foramen,all humerus have nutrient foramina. It was concluded that the majority (73.61%) of the nutrient foramina werepresent on the antero-medial surface, 8.33% on the anterolateral surface and 8.33% on the posterior surface ofthe shaft of humerus and 8.33% of nutrient foramina present on anterior border. It was also concluded that most(86.11%) of the foramina present in the zone II followed by zone I (8.33%) then by zone III (5.56%). All foraminawere directed toward the lower end of humerus.Conclusion: By knowing the number and location of the nutrient foramina in humerus would be useful in preventingintra-operative injury of nutrient artery during orthopedic, plastic and reconstructive surgery and will also berelevant in medico legal practice.

Anatomical and Morphological Study of Nutrient Foramen in Leg Bones

Introduction: Knowledge of position of nutrient foramina of long bones can be useful in certain surgical procedures. Bone ossification, growth and healing depend on its vascularity. Nutrient artery is the main source of blood supply of bone along with periosteal arteries. The topographical knowledge of these foramina is useful in certain operative procedures, in orthopedics as well as in plastic and reconstructive surgeries.AIM: The present study aims to determine the number and position of nutrient foramen of tibia and fibula and to observe direction and obliquity of nutrient foramina. Subjects and Methods: 100 adult dry bones including 50 tibia and 50 fibula were studied. Nutrient foramina were identified with naked eyes. The obliquity was determined with hypodermic needle. The nutrient foramina location was determined by dividing total bone into segments, the locations were validated by calculating foraminal index. Results: It has been observed that 98% (49) tibia has single nutrient foramina, double nutrient foramiana present in 2%of tibia. Most of the nutrient foramina in tibia are present in upper third i.e 65%(33).Foramina index of tibia is 45.05 with standard deviation of 8.29.In fibula single foramen was observed in 46(92%) and double foramina 2(4) and there is no nutrient foramen in 2(4). In 2 fibulae having double nutrient foramen, proximal foramen was directed downward and distal foramen was directed upwards. In 50%(25) nutrient foramina is present in posterior surface,most of nutrient are in middle third 48(96%).mean foraminal index of fibula is 45.05 with standard deviation of 8.29. Conclusion: Our study has attempted to put together findings from different studies regarding the number and position and obliquity of nutrient foramina of leg bones .The present study will be useful for orthopedic surgeons during procedures like bone grafting and more recently microsurgical vascularised bone transplantation and new graduates to understand the importance of nutrient foramina of long bones.

Study of Nutrient Foramina of Human Radii of Saurashtra Region

Introduction: In long bones including radius, surface opening of nutrient canal is known as nutrient foramen, which transmits nutrient artery to supply cortical bone and medullary cavity. Topographical information about nutrient foramen is very crucial during various orthopedic surgical procedures. Objective: Present study was conducted to study number of nutrient foramina, its location and direction in relation to growing end of bone and to calculate foraminal index of human radius. Subjects and Methods: In present study 63(31 right and 32 left sided) radii bone of unknown age and sex were studied. Only fully intact bone without any disease were included. Surface location and direction of nutrient foramina were recorded. Total length of radius was measured with osteomatric board. Distance of nutrient foramen from proximal end was measured with digital vernier caliper. And foraminal index was calculated. All data was tabulated and analyzed statistically. Results: All radii had single nutrient foramen. Majority (82.54%) of the nutrient foramina were detected on the anterior surface, 14.29% were on posterior surface and only two bone have nutrient foramen on other surface. Zone I contained 30.16% and Zone II contained 66.67% and Zone III contained 3.17% foramina. Direction of all foramina were towards upper end of radius except two bones. Conclusion: Almost all the results coincided with previous studies from different geographical regions. Thorough knowledge of morphology of nutrient foramina is necessary for preserving circulation. Because it is very crucial in bone grafting, fracture healing, joint replacement therapy and vascularized bone micro surgeries.

Avaliação da variação de área e transporte foraminal após preparo e ampliação apical / Evaluation of area variation and foraminal transport after preparation and apical enlargement

A limpeza durante o preparo endodôntico tem por objetivo a eliminação de todo conteúdo séptico dos canais radiculares ao passo que a modelagem atribui ao mesmo conformação regressivamente cônica desde o orifício de sua entrada até o ápice, mantendo-se ao máximo sua anatomia original. Um dos maiores desafios da Endodontia é promover adequada limpeza e desinfecção de todo sistema de canais principalmente na região apical em equilíbrio com a manutenção da anatomia apical, o que favoreceria a reparação. Diante do exposto, este estudo teve como propósito, avaliar por meio da microscopia eletrônica, a capacidade de ampliação apical e transporte foraminal nos procedimentos de patência e alargamento utilizando instrumentos de glide path após instrumentação mecanizada. Para tal finalidade foram avaliados, por meio de Microscopia Eletrônica de Varredura (MEV), os forames de 60 raízes antes e após a instrumentação com sistema automatizado Easy Pro Logic. Todas as raízes foram preparadas com instrumento 40/05 com comprimento de trabalho 1 mm aquém e posteriormente complementadas com instrumentos de glide path 45/01 e 50/01 no comprimento do dente ou 1 mm além de acordo com os grupos experimentais. Os resultados revelaram que houve aumento do diâmetro apical estatisticamente significante com consequentemente maior remoção de debris nos grupos onde foi realizada a ampliação foraminal. Em todos os grupos experimentais houve regularização no desgaste dos forames após a instrumentação com inexpressivo transporte apical, no entanto, o grupo onde foi realizada a ampliação foraminal com instrumento 40.01 além do comprimento do dente apresentou menor coeficiente de deformação e transporte foraminal. Conclui-se que melhores resultados, tanto na variação da área do forame quanto no transporte foraminal foram obtidos nos grupos onde foi realizada a ampliação apical(AU)

Cleaning during endodontic preparation aims to eliminate all septic content from the root canals, while modeling attributes to the same conformation that is regressively conical from the entrance orifice to the apex, maintaining its original anatomy as much as possible. One of the greatest challenges in Endodontics is to promote adequate cleaning and disinfection of the entire canal system, mainly in the apical region, in balance with the maintenance of the apical anatomy, which would favor repair. In view of the above, this study aimed to assess, through electron microscopy, the capacity of apical enlargement and foraminal transport in the procedures for patency and enlargement using glide path instruments after mechanized instrumentation. For this purpose, the Scanning Electron Microscopy (SEM) evaluated the foramina of 60 roots before and after instrumentation with an automated Easy Pro Logic system. All roots were prepared with a 40/05 instrument with a working length of 1 mm below and then supplemented with 45/01 and 50/01 glide path instruments in the tooth length or 1 mm in addition to the experimental groups. The results revealed that there was a statistically significant increase in the apical diameter with consequently greater removal of debris in the groups where foraminal enlargement was performed. In all experimental groups there was regularization of foramen wear after instrumentation with inexpressive apical transport, however, the group where foraminal enlargement was performed with instrument 40.01 in addition to the length of the tooth showed a lower coefficient of deformation and foraminal transport. It was concluded that better results, both in the variation of the foramen area and in the foraminal transport, were obtained in the groups where the apical enlargement was performed(AU)

Percutaneous Stenoscopic Lumbar Decompression with Paramedian Approach for Foraminal/Extraforaminal Lesions

The lumbar foramen is affected by different degenerative diseases, including extraforaminal disc herniation, foraminal stenosis (FS), and degenerative or spondylolytic spondylolisthesis. The purpose of this study was to describe percutaneous stenoscopic lumbar decompression with a paramedian approach (para-PSLD) for foraminal/extraforaminal lesions. All operative procedures were performed using a complete uniportal endoscopic instrument system. The para-PSLD can be easily applied to patients with FS and narrow disc space or facet joint hypertrophy. The anatomical view of a para-PSLD is similar to that of a conventional open surgery and allows for good visualization of the foraminal/extraforaminal areas. We suggest that para-PSLD is an alternative and minimally invasive procedure to treat degenerative lumbar foraminal/extraforaminal stenoses.

A Study On Variations Of Nutrient Foramen Of Ulna In Saurashtra Region With Its Clinical Relevance

Background: Nutrient foramen is an opening into shaft of Ulna which gives passage to the blood vessels ofmedullary cavity. The knowledge of nutrient foramen is important in surgical procedures like bone grafting andmore recently in microsurgical vascularized bone transplantation.Objective: To determine the number, location and direction of nutrient foramen and whether the nutrient foramensobey the rule of ossification, that is directed away from the growing end of the bone or not.Method: The present study consisted of 150 (75 right and 75 left) dried ulna bones excluding any fracture orpathological abnormalities Number and direction of nutrient foramen was observed in each ulna. Location ofnutrient foramen in relation with surfaces and zones of ulna was determined.Result: It has been observed that 96.67% of the ulna had a single nutrient foramen, 1.33% double foramen and 2%had no nutrient foramen. It was concluded that 90% of the nutrient foramina were present on the anteriorsurface, 5.33% on anterior border and 4.67% on interosseous border It was also concluded that most (62.67%)of the foramina present in the zone II followed by zone I (23.33%) then by zone III (14%). All foramina weredirected toward the upper end of ulna.Conclusion: By knowing the number and location of the nutrient foramina in ulna would be useful in preventingintra-operative injury of nutrient artery during orthopedic, plastic and reconstructive surgery and will also berelevant in medico legal practice.

Surgical design and clinical application of posterior percutaneous full-endoscopic cervical foraminotomy for cervical osseous foraminal stenosis / 中国修复重建外科杂志

Objective: To design the method of posterior percutaneous full-endoscopic cervical foraminotomy (P-PECF) for treating cervical osseous foraminal stenosis and analyze its feasibility in clinical application. Methods: The clinical data of 12 patients with cervical osseous foraminal stenosis who met the selection criteria between October 2015 and June 2017 were retrospectively analysed. There were 7 males and 5 females with an age of 52-63 years (mean, 57.6 years). The disease duration ranged from 15 days to 6 months (mean, 3.7 months). The segments included C 4, 5 in 2 cases, C 5, 6 in 6 cases, and C 6, 7 in 4 cases; all showing root pain or numbness caused by nerve root compression. All patients were treated with the P-PECF technique. At preoperation, immediately after operation, and at last follow-up, visual analogue scale (VAS) scores and neck disability index (NDI) were respectively recorded to assess the patient's quality of life and the pain of neck and arm. The clinical outcomes were evaluated by the modified Macnab criteria. Results: All operations were successful. The operation time was 71-105 minutes (mean, 82 minutes); the intraoperative blood loss was about 5 mL. The CT of the cervical spine at 1 week postoperatively showed that the cervical root canal was enlarged and the nerve root compression was relieved. The symptoms of neck and arm pain and numbness were relieved; the hospitalization time was 2-5 days (mean, 3 days). All patients were followed up 6-18 months (mean, 12.3 months). Except for 1 patient's feeling transient hypoesthesia postoperatively, there was no complication such as hematoma, nerve root injury, or incision infection. The VAS scores and NDI at immediate postoperatively and at last follow-up were significantly improved when compared with preoperative scores ( P<0.05); and the scores also improved significantly at last follow-up when compared with the scores at immediate postoperatively ( P<0.05). According to modified Macnab criteria, the results were excellent in 9 cases, good in 2 cases, and fair in 1 case, with an excellent and good rate of 91.7%. Conclusion: The P-PECF technique can enlarge the nerve root canal and relieve nerve root compression, and obtain better effectiveness by minimally invasive methods. It is a safe and feasible procedure.

Effect of Limited Laminectomy Combined with Foraminal Stenosis Decompression on Preventing C5Palsy / 中国康复理论与实践

@#Objective To observe the effect of limited laminectomy combined with foraminal stenosis decompression on preventing C5nerve root palsy and improving neurological function. Methods From March,2014 to May,2016,69 patients with multi-segment cervical spondylotic myelopathy underwent surgical treatment in our hospital were included.Thirty-eight patients(group A)were treated with limited lami-nectomy combined with foraminal stenosis decompression and internal fixation,and 31 patients(group B)under-went routine laminectomy and internal fixation.The postoperative neurological recovery rate,cervical curvature index(CCI)and C5palsy rate were recorded and analyzed. Results No spinal cord and nerve injury occurred during the operation.The width of laminectomy was(16.8±2.1)mm in group A,and was significantly less than(21.7±2.5)mm in group B(t=8.849,P<0.001).There was no significant difference in operation time and intraoperative blood loss between two groups(t<0.439,P>0.05).The Japanese Orthopaedic Association (JOA) score increased continuously after surgery in both groups (F>42.996, P<0.05), and no significant difference was found between them at each time point(t<1.021,P>0.05).The cervical curva-ture index improved after surgery(F>86.379,P<0.05),and no significant difference was found between them at each time point(t<0.943,P>0.05).The spinal cord drift distance was(3.6±0.7)mm in group A,and ws signifi-cantly shorter than(2.5±0.5)mm in group B(t=7.602,P<0.001).There was no significantly difference in the neu-rological recovery rate between two groups(t=0.724,P=0.471).The C5palsy rate was lower in group A(5.2%,2/38)than in group B(22.5%,7/31)(χ2=4.514,P=0.034). Conclusion Limited laminectomy combined with foraminal stenosis decompression could relieve the spinal cord com-pression and restrict the excessive back drift, promote the neurological function recovery and reduce the inci-dence of C5palsy.

Análise da precisão do exame de tomografia computadorizada de feixe cônico na determinação do comprimento de trabalho durante a terapia endodôntica / Analysis of the accuracy of cone beam computed tomography exam in determining the work length during root canal treatment

Objetivo: Avaliar a precisão do exame de Tomografia Computadorizada de Feixe Cônico (TCFC) na determinação do comprimento de trabalho (CT) em 24 dentes humanos unirradiculares. Material e Método: Após a realização dos procedimentos de abertura coronária, exploração do canal radicular e preparo dos terços cervical e médio os dentes tiveram seus comprimentos de trabalho determinados pelos métodos direto, eletrônico e tomográfico. No método direto, o CT foi determinado visualmente com o auxílio de uma lima do tipo K-File #20, enquanto que nos métodos eletrônico e tomográfico, as odontometrias foram estabelecidas, respectivamente, com a utilização de um localizador eletrônico foraminal da marca Root ZX II e em imagens de TCFC obtidas em um tomógrafo Prexion 3D. Os dados foram analisados por meio do teste ANOVA ao nível de 5% de significância Resultados: Ao todo foram realizadas 72 mensurações. Não foram observadas diferenças estatisticamente significantes entre as medidas obtidas pelos diferentes métodos empregados. Conclusões: O exame de TCFC revelou ser uma alternativa eficaz para a obtenção do CT durante a terapia endodôntica.

Aim: To evaluate the accuracy of Cone Beam Computed Tomography (CBCT) in work length (WL) determination in twentyfour single-rooted human Material and Methods: After performing the procedures of coronary opening, root canal exploration and cervical preflaring, the teeth had their work lengths determined by direct, electronic and tomographic methods. In the direct method, the WL was determined visually, using a #20 KFile instrument. In the electronic and tomographic methods, the WLs were determined using the Root ZX II locating device and TCFC images, respectively. The data were analyzed statistically by the ANOVA test at 5% significance level. Results: A total of 72 measurements were performed. No statistical difference was observed between the measurements obtained by the different methods. Conclusions: The CBCT proved to be an effective alternative for WL determination during root canal treatment.