O objetivo no presente estudo foi avaliar, por meio de tomografia computadorizada cone beam, o transporte do canal, o aumento da área do canal e o desgaste da dentina intrarradicular na região voltada para a furca de molares inferiores com diferentes instrumentos e verificar a influência do desgaste na determinação do instrumento apical inicial (IAI) por meio de MEV. Os dentes foram dispostos (n=10) em três bases de resina (corpos de prova) de acordo com o tipo de preparo cervical e submetidos ao escaneamento em tomógrafo computadorizado de feixe cônico. Em seguida foi realizado o preparo cervical nos canais mesiais G1: Gattes-Glidden 2 e 3 nos canais mesiais e 3 e 4 no distal; G2 LA Axxess 20.06 e 35.06 nos canais mesiais e 35.06 e 45.06 no canal distal. Concluído o preparo do terço cervical os corpos de prova foram submetidos a novo exame tomográfico. O IAI foi determinado inserindo-se passivamente limas tipo K de aço inox, seqüencialmente a partir da lima #10 até obter a sensação de travamento do instrumento no comprimento de trabalho, em seguida este instrumento foi fixado utilizando-se adesivo à base de cianoacrilato para posterior corte apical e observação em MEV. O índice de centralização não mostrou diferença estatística entre os grupos estudados. O aumento percentualda área do canal pós preparo apresentou diferença estatisticamente significante apenas no canal mesio-lingual (p=0,023), o desgaste da dentina intraradicular na região voltada para a furca foi estatisticamente diferente somente na raiz distal. Os resultados mostraram que o percentual médio de ocupação da área do canal pelo IAI não apresentou diferença estatística entre os grupos estudados. Concluiu-se que o desgaste da região de cervical com Gates-Glidden e LA Axxxes não influenciou na determinação precisa do diâmetro anatômico apical nos canais de molares inferiores. / The aim of this study was to evaluate, by means of cone beam computed tomography, the transportation, the increased of the area, and the dentine thickness of the cervical third of the root canal of thirty lower first molars prepared with different instruments and the influence of this preparation to determining the initial apical file to bind (IAI), through scanning electron microscopy. The teeth (n = 10) were fixed on three resin plates (samples) according to the instrumentsused in the cervical preflaring and scanned with a cone beam computed tomography device. Then, preparation was performed in the cervical third of the canals: G1 Gattes-Glidden burs #2 and #3 in the mesial canals and #3 and #4 in the distal canal; G2 - LA Axxess #20.06 and #35.06 in the mesial canals and #35.06 and #45.06 in the distal canal. After preparation, the specimens were submitted to a new CT scan. Each canal was sized using manual K-files, starting with size 08 files, until the working length (WL) was reached. File sizes were increased until a binding sensation was felt at the WL, and the instrument sizewas recorded for each canal. The files were fixed with methylcyanacrylate at the WL. Teeth were then sectioned transversally 1 mm from the apex, with the binding file in the position. The apical region was then observed under a scanning electron microscope. The centering ratio showed no statistical difference between groups; the percentage of area increase after preparation showed statistical significance only in the mesio-lingual canal (P = 0.023); the thickness of the dentine in the region facing the furcation showed statistical difference only in the distal root. SEM analysis showed that the mean percentage area of the IAI in relation to the root canal area at the WL showed no statisticalsignificant difference between groups. It was concluded that cervical preflaring with Gates-Glidden or LA Axxess did not influence the determination of the apical gauging in lower molars.

A ação das metaloproteinases de matriz (MMP-2, MMP-9 e MT1-MMP) é necessária para degradação da membrana basal em carcinomas da cérvice uterina. O objetivo deste trabalho consistiu na avaliação da expressão das metaloproteinases MMP -2, -9 e MT1-MMP, do gene supressor de metástase RECK e do inibidor tecidual de MMPs (TIMP-2) em modelo de células de neoplasia da cérvice-uterina cultivadas em substratos de matriz extracelular. As linhagens celulares de carcinoma de cérvice uterina SiHa, CaSki, ambas HPV 16 positivas, e C33A, HPV negativa, foram cultivadas em gel de colágeno tipo I, Matrigel e plástico. Avaliou-se o crescimento, invasão, expressão gênica, através de ensaios de real-time PCR, e atividade de metaloproteinases, através de ensaios de zimografia. Os resultados demonstraram que estas linhagens de carcinoma cervical quando cultivadas em gel de colágeno tipo I apresentaram uma diminuição no crescimento, morfologia modificada na presença de substrato de matriz extracelular, e que nas linhagens HPV positivas há um aumento da expressão de MMP-2, MT1-MMP e TIMP-2 e da atividade de pró-MMP-2 em relação à linhagem HPV negativa. Observou-se também que, RECK apresentou maior expressão gênica em CaSki associada à atividade de pró-MMP-2. MMP-9 apresentou muito baixa expressão gênica em todas as linhagens e condições estudadas. Quando analisamos as linhagens separadamente, observamos que o Matrigel influenciou a expressão gênica de MMP-2, e que o gel de colágeno tipo I aparece como indutor da atividade de pró-MMP-2 em todas as linhagens. Em conclusão, nossos resultados mostram que a expressão de MMP-2, MT1-MMP e TIMP-2 e que a atividade de pró-MMP-2 estão aumentadas nas células HPV positivas, sugerindo que o HPV está associado com a expressão de MMPs e TIMP-2. / Matrix metalloproteinases (MMPs) -2, -9, and MT1-MMP are required for basement membrane degradation in cervical carcinoma. We evaluated the expression and activity of MMPs and their inhibitors RECK and TIMP-2 in three human invasive cervical carcinoma cell lines. Two HPV-16- positive cell lines (SiHa and CaSki), HPV-negative cell line (C33A) were cultured either onto type-I collagen gel, Matrigel or plastic, in order to recreate their three-dimensional growth environment and evaluate the growth and invasion of the cells and expression of these genes using quantitative real-time PCR (Q-PCR). We also analyzed the gelatinolytic activity of MMP-2 and -9 by zymography. We found that the growth curves carcinoma cells are decreased and cells morphology are modified in ECM substrate. HPV-positive cell lines expressed higher levels of MMP-2, MT1-MMP and TIMP-2 than the HPV negative cell line. In addition, MMP-9 was expressed at very low levels in both HPV-negative and HPV-positive cell lines. We also observed that the expression of the RECK gene is higher in CaSki cells, being associated with pro-MMP-2 activity. The Matrigel substrate influence MMP-2 expression for SiHa and CaSki cells. On the other hand, we found that type-I collagen gel, but not Matrigel, can enhance pro-MMP-2 activity in all cell lines. Our results suggest that the presence of HPV is related to increased expression of MMP -2, MT1-MMP and TIMP-2 and pro-MMP-2 activity in HPV-positive cells than in HPV-negative cells.

A infecção genital pelo papilomavírus humano (HPV) corresponde a uma das doenças sexualmente transmissíveis mais frequentes no mundo. Uma preocupação dos pacientes que apresentam HPV na região anogenital diz respeito à possibilidade de disseminação desse vírus para outras partes do corpo. O objetivo geral desse estudo foi avaliar a possível correlação existente entre infecções pelo HPV na mucosa oral e no colo uterino em mulheres com sorologias positiva e negativa para o HIV. Pretendeu-se, também, identificar variáveis clínicas, demográficas e laboratoriais associadas à infecção oral pelo HPV. A amostra foi constituída por 200 pacientes do gênero feminino, sendo 100 com sorologia positiva para HIV (grupo 1) e 100 com sorologia negativa para HIV (grupo 2). As pacientes foram incluídas consecutivamente no Centro de Referência e Treinamento em DST-AIDS entre abril de 2008 a maio de 2009. Todas as pacientes assinaram um Termo de Consentimento Livre e Esclarecido e responderam a uma ficha com questionamentos sobre hábitos e comportamento sexual. Além disso, tiveram as cavidades oral e ginecológica examinadas, sendo que células superficiais de ambos os locais foram coletadas e avaliadas pela captura híbrida 2 e pela citologia em base líquida. Para comparação de variáveis qualitativas, como freqüências e proporções, foi utilizado o teste de qui-quadrado ou exato de Fisher, se necessário. Para comparação de dados quantitativos, foram utilizados os testes de Mann-Whitney ou t de Student. A análise multivariada foi executada utilizando-se o teste de regressão logística, sendo que o valor de significância estatística estabelecido foi de 5% (p<0,05). O DNA do HPV foi detectado nas amostras cervicais de 41 (41%) pacientes HIV+ e de 45 (45%) HIV- (p=0.67). Nas amostras da cavidade oral, o DNA do HPV foi observado em 11 mulheres do G1 (HIV+) e em 2 mulheres do G2 (HIV-) (OR=6,06; 95%IC=1,31-28,07; p=0,02). Os subtipos oncogênicos foram prevalentes em ambos os grupos, sendo que não foi observada diferença entre os grupos (p=0.87). Nenhuma paciente apresentou lesão macroscópica oral relacionada ao HPV, sendo que 15 (15%) mulheres do G1 (HIV+) e 17 (17%) do G2 (HIV-) apresentaram lesão macroscópica na região genital (p=0.2129). Com os resultados obtidos pôde-se concluir que nesta população não houve correlação entre a infecção pelo HPV nas mucosas oral e cervical. Além disso, as pacientes HIV+ apresentaram maior prevalência de infecção pelo DNA-HPV na boca em comparação às pacientes HIV-. / Human papillomavirus (HPV) is one of the most prevalent sexually transmitted viruses worldwide with both oral and genital manifestations. The high prevalence of HPV infection among HIV + individuals provides an opportunity to elucidate the relationship between oral and cervical HPV-infection in this group of subjects. The aim of this study is to evaluate the possible association between oral and cervical infections in HIV-positive and negative patients. One hundred HIV+ (group 1) and 100 HIV- (group 2) women were recruited consecutively from a gynecologic clinic between April 2008 and May 2009. All subjects were given a cervical and oral examination. Cytological samples were evaluated by the hybrid capture 2 technique from oral and cervical scrapings. Statistical analysis was performed using chi-square test and p values < 0.05 were considered significant. HPV-DNA was detected in cervical scrapings from 41 (41%) HIV-positive subjects and from 45 (45%) HIVnegative subjects (p=0.67). In oral samples, HPV-DNA was observed in 11 subjects from group 1 and in 2 subjects from group 2 (p=0.02). High-risk HPV subtypes were prevalent in both groups and no difference between the groups was detected (p=0.87). No subject showed macroscopic oral HPV-related lesion, whereas 15 (15.00%) from group 1, and 17 (17.00%) from group 2, presented with macroscopic genital lesion (p=0.2129). HPV-DNA was more frequent in oral mucosa of HIV+ patients than HIV- (p=0,018). There was no association between oral and cervical HPV infection in HIV+ and HIV- patients. Presence of cervical lesion was not associated with oral lesion.

O Papilomavírus Humano (HPV), da família Papilomaviridae, são vírus epiteliotrópicos que provocam lesões de pele ou mucosa. O carcinoma do colo uterino é uma das principais causas de morte de mulheres em todo o mundo, sendo a infecção pelo HPV o principal fator de risco para o desenvolvimento do carcinoma cervical. Durante o processo maligno, a migração descontrolada de células neoplásicas, é uma característica fundamental da invasão tumoral, sendo que as metaloproteinases de matriz (MMPs) participam largamente deste processo pois são responsáveis pela clivagem de proteínas da matriz extracelular. O projeto propôs investigar a expressão de MMP-9 total em amostras cérvico-vaginais com inflamação, lesão e tumor. Foram coletadas duas amostras cérvico-vaginais como esfregaços para diagnóstico citológico e imunocitoquímica. A coleta foi realizada em 630 pacientes da Penitenciária Feminina de Sant´ana, no período de agosto de 2009 a agosto de 2010. As lâminas foram submetidas à imunocitoquímica para detecção da expressão de MMP-9. Os resultados indicaram um aumento da expressão de MMP-9 total diretamente proporcional com o aumento do grau das lesões nos esfregaços, corroborando com dados de histologia da literatura. Portanto, tal método de correlação de MMP-9 total com esfregaços cérvico-vaginais poderá auxíliar o prognóstico em esfregaços. / The Human Papillomavirus (HPV) are epitheliotropic viruses from family Papillomaviridae, which cause skin or mucous lesions. Carcinoma of the cervix is a major cause of death in women worldwide, and HPV infection a major risk factor for development of cervical carcinoma. During the malignant process, cell migration is a fundamental characteristic of tumor invasion, and the matrix metalloproteinases (MMPs) are responsible for the cleavage of extracellular matrix proteins. This project aims to investigate the expression of MMP-9 in different degrees of injury in the smear. We collected two cervical smears for cytological diagnosis and immunocytochemistry. Data collection was conducted in 630 women of the Sant´ana Women\'s Penitentiary, during the period August 2009 to August 2010. The slides were submitted to immunocytochemistry to detect the expression of MMP-9 and noticed an increase in protein expression in parallel with the increased lesions grade, which corroborates the histology of the literature and could be a method prognostic aid in vaginal smears.

Este estudo avaliou biomecanicamente o efeito da força resultante, em região de coluna cervical, exercida por um aparelho odontológico ortopédico mecânico, instalado em um paciente tipo classe III de Angle, durante o período de 06 meses. Para isso, selecionou-se um paciente de 10 anos e 04 meses de idade, leucoderma, do sexo masculino, para servir de modelo para este estudo. Ao exame intra-oral foram observadas chave de molares em classe III de Angle, mordida cruzada anterior, dentição mista e arcada superior atrésica. Na avaliação radiográfica, juntamente com análises de USP, Mac Namara, Bimler e Petrovic, foram constatadas maloclusão tipo classe III e potencial de crescimento mandibular maior que maxilar. Na análise de modelos, observaram-se, discrepâncias positivas tanto no sentido transversal como ântero-posterior nas duas arcadas. Foram solicitados exames radiográficos panorâmico, tele-radiografia lateral e de coluna torácica para elaboração do diagnóstico e plano de tratamento. Após isso, foi proposta a disjunção da arcada superior através de disjuntor de Mc Namara modificado e tracionamento da maxila com máscara facial de Petit, utilizando para isso, elásticos extra-orais com tração de força média (400gf). Após o uso da máscara por 06 meses, numa média de 14 horas por dia, foram feitas novas radiografias crânio cervicais para a avaliação da nova situação. O que se pode observar, além da correção da mordida cruzada anterior (clinicamente), foi, radiograficamente, a flexão da coluna do paciente com uma extensão compensatória do crânio e encurtamento de alguns músculos extensores da coluna cervical, analisados em seus marcos ósseos de origem e inserção. / This study has evaluated biomechanicaly the effect of the resultant strength at the cervical column developed by an odonthologic orthopedical mechanic appliance installed in a class III of Angle patient during 6 months. The model for this study is a 10 years and 4 months old patient, during six months. The model for this study is a 10 years and 4 months old patient, male and white. By the intra-oral exam it was possible to observe that the patient had molars in class III of Angle, previous crossed bite, mixed teething and the superior arcade is atresical. By the radiographic evaluation with analysis from USP, Mac Namara, Bimler e Petrovic, was detected a malocclusion class III and a potential of bigger mandibular growth then jaw. By the model analysis, a positive differences in the transversal as well as in the antero-posterior region of both arcades. Panoramic radiological exams, lateral and thoracic vertebral column teleradiografic exams were done in order to elaborate a diagnosis and a treatment plan. Afterwards a disjunction from the superior arcade through a modified disjunctor was proposed and a maxilla tracking through a Petit facial mask, with intra oral gummy strings with a medium strength force (400gf). After using this mask for 6 months, about 14 hours a day, other cranial-cervical x rays were done to evaluate the new results. It\'s possible to observe that not only the crossed bite was corrected (clinically) but also the cervical column flexion from the patient with a compensatory cranial extension. A shortening of some extensor muscles of cervical column, analyzed in its osseous marks of origin and insertion, was also observed.

Thesis (MPA.) -- University of Limpopo, 2018 / Background: Cancer of the cervix is the fourth most common cancer affecting women worldwide and is currently considered as a sexually transmitted cancer. This type of cancer is caused in most cases by a viral infection, Human Papilloma Virus (HPV) strains 16 and 18. Cervical screening aims to prevent invasive cervical carcinoma by detection and treatment of its precursors cervical intraepithelial neoplasia grade 2 (CIN2) and, particularly, grade 3 (CIN3). The current study aimed at determining the distribution of cervical cancer and the association of cervical cancer with HIV infection in Limpopo Province. Methods: The current study used quantitative retrospective method to systematically review the available data on Papanicolaou (Pap) smears from National Health Laboratory Services at Polokwane hospital from the year 2013 to 2015. The data was kept anonymously by not using the names of the patients and ethical clearance was received from the Turfloop Research Committee of University of Limpopo in consideration of section 14, 15, 16, and 17 of National Health Act 61 of 2004. The data was exported to excel spreadsheet and cleaned before exported into SPSS 23.0 software which was used for data analysis. Results: The findings from the current study show a decline of 33% in the number of Pap smears that were submitted for cytology between 2013 (82 041) and 2015 (23 527) in Limpopo province. However, the study revealed that there is an increase in prevalence of cervical cancer from 16.7% in 2013 to 19.2% in 2015 in Limpopo Province. In the same period this rural province already demonstrates a high burden of cervical cancer among the middle aged women. The positive cervical smears were classified as cervical intraepithelial neoplasia (CIN) I, II, or III and therefore, 78.5% were CIN I, 21% CIN II and 0,5% CIN III. HIV infections have been found to be associated with cervical cancer as the prevalence of cervical cancer among HIV positive women was found to be 25% and most of the affected women are the middle aged group. vi Conclusion: The screening coverage for cervical cancer has decreased in Limpopo Province but the prevalence of cervical cancer has increased by 2.5% therefore, this translates to the need for community awareness about prevention of cervical cancer. Majority of the cases were classified as CIN 1 at 78.5% which can be cured if treatment started early. The Limpopo Province should therefore strengthen strategies to integrate HIV and cervical cancer services as it was found that there is a strong association between the HIV and cervical cancer.

Cervical cancer is the fifth most common cancer in United States with more than 12,000 women diagnosed each year and more than 4,000 preventable deaths with minorities disproportionally represented. Cervical cancer prevention strategies rarely focus on the management of abnormal screening results. The purpose of this quality improvement project was to standardize the management program for abnormal cervical cancer screening results within an integrated health delivery system serving a large minority community. The Plan-Do-Study-Act model guided a comprehensive program evaluation with process improvement, including the creation of an electronic quality data reporting tool to formalize the work process and a quality control and assurance program with exception reports. The evaluation was completed with data to measure the timeliness of abnormal results outreach and continued clinical management. The data were evaluated over time with run charts. Also, an analysis of the data was done through pre- and post-test comparisons with 2-sample t tests to evaluate abnormal cervical cancer screening management before and after the revisions. Although the project did not show a statistically significant difference in the timeliness of outreach and follow-up of abnormal cervical cancer screening results due to the limited data set, the run charts trended positively for timeliness and consistent data reporting with no missed screening reports. Effective cervical cancer screening includes the accurate and timely management of abnormal results to reduce disparities in cervical cancer deaths. This project contributes to positive social change by responding to the Healthy People 2020 goal to reduce the incidence of cervical cancer deaths through a formal process to insure timely intervention for abnormal results in a largely minority community.

African American women tend to have lower attendance rates at cervical cancer screenings compared to the attendance rates of women from other ethnic groups. The purpose of this research project was to understand how perceptions of African American women affects attendance of future cervical cancer screenings. The goal was to understand what contributes to low attendance. Previous research did not focus on factors contributing or interfering with appointment attendance among African American women, aged 30-65. The conceptual framework was based on individual health behavior. The research questions examined lived experiences affecting attendance of cervical cancer screenings, attendance of future screenings, and perceptions of experiences. Data collection was based on a phenomenological approach. Open-ended questions were used to gather descriptions of 5 participants' experiences via telephone interviews. These interviews were recorded, transcribed, and coded for recurring themes and patterns. Findings revealed 3 emergent themes related to the attendance of screenings: being knowledgeable of the purpose of cervical cancer screening, a female examiner performing the screening, and the encouragement of family and friends. The implications for social change would be increased knowledge among African American women aged 30-65 and the medical community.

In 2015, there were 257,524 women with cervical cancer (CC) in the United States (U.S.). CC is preventable; screening detects early-stage cancer when treatment is most successful. This study aimed to identify predictors for CC screening adherence among U.S. women, describe predictors for screening adherence by marital status, and examine physician recommendation for CC screening and adherence to those recommendations. Predictors were grouped as demographic, acculturation, access to care, chronic conditions, and health behaviors. Descriptive analyses were performed on a sample of 10,667 women from the 2015 National Health Interview Survey, and multiple logistic regression models determined predictors of CC screening adherence, physician recommendations, and adherence to physician recommendations. Overall, 81.7% (95%CI=80.7-82.7%) of U.S. women adhered to CC screening guidelines. Adherence declined with increasing age after 39 years old. Never married women (adjusted odds ratio[aOR]=0.67, CI=0.56-0.79) or current smokers (aOR=0.70, CI=0.59-0.84) had lower odds, while college-educated women had greater odds (aOR=1.38, CI=1.14-1.67) of CC screening adherence. Among unmarried women, 78.6% adhered to CC screening. Unmarried women who were unemployed (aOR=0.48, CI=0.38-0.62), had no physician visits (aOR=0.58, CI=0.40-0.85), no usual source of care (aOR=0.67, CI=0.50-0.89), never heard of HPV (aOR=0.59, CI=0.46-0.76), never received HPV vaccine (aOR=0.50, CI=0.34-0.75), no birth control use (aOR=0.33, CI=0.23-0.47), no flu shot (aOR=0.62, CI=0.48-0.80), and perceived low breast cancer risk (aOR=0.66, CI=0.47-0.92) had lower odds of adherence. Among women with a physician, 55.6% received screening recommendations. Race/ethnicity, access to care, HPV knowledge and vaccine receipt, age when first child was born, and flu shot were significant predictors of physician recommendation for CC screening. Significant predictors of adherence to physician recommendation included education, employment, English proficiency, outpatient clinic visits, usual source of care, age when first child was born, birth control, alcohol use, smoking status, flu shot, and health status. Based on our results, two levels of intervention should be explored. First, targeted interventions are needed for women who are unmarried, have low socio-economic status, and limited access to care to reduce cervical cancer risk. Second, interventions for physicians to increase screening recommendations to all eligible women are needed to improve national screening rates.

Cervical spondylotic myelopathy is the most common spinal cord disorder in persons over 55 years of age in North America and perhaps in the world. Surgical options are broadly classified into two categories namely, anterior and posterior approaches. This study focuses on the posterior based approach (i.e. laminectomy or laminoplasty) which is considered when multiple levels of the spine have to be decompressed or when most of the cord compression results from posterior pathological conditions. The external and internal behavior of the spine after laminoplasty and laminectomy has been evaluated using both experimental and computational methods. Computationally, a validated intact 3D finite element model of the cervical spine (C2-T1) was modified to simulate laminectomy and laminoplasty (open door (ODL) and double door (DDL)) at levels C3-C6. During flexion, after ODL the adjacent levels C2-C3 and C6-C7 showed a 39% and 20% increase in the motion respectively; while no substantial changes were observed at the surgically altered levels. The percent increase in motion after DDL varied from 4.3% to 34.6%. The inclination towards increased motion during flexion after double door laminoplasty explains the role of the lamina-ligamentum flavum complex in the stability of spine. Compared to the intact model, laminectomy at C3-C6 led to a profound increase (37.5% to 79.6%) in motion across the levels C2-C3 to C6-C7. Furthermore, the changes in the von Mises stresses of the intervertebral disc observed after laminoplasty and laminectomy during flexion can be correlated to the changes in the intersegmental motions. An in-vitro biomechanical study was conducted to address the effects of laminoplasty (two-level and four-level) and four-level laminectomy on the flexibility of the cervical spine. Both two-level and four-level laminoplasty resulted in minimal changes in C2-T1 range of motion. For flexion/extension, two-level and multi-level laminoplasty showed an approximate 20% decrease (p>0.05) in the range of motion at C4-C5 and C2-C3 respectively due to the encroachment of the spinous process into the opened lamina. The decrease was mostly observed in older specimens and specimens with adjacent laminae close to each other; thus leading to the encroachment of the spinous process into the opened lamina. Laminectomy resulted in a statistically significant (p<0.05) increase in the range of motion compared to the intact condition during the three loading modes. These results correspond well with the finite element predictions, where a four-level ODL and laminectomy resulted in a minimal 5.4% and a substantial 57.5% increase in C2-T1 motion respectively during flexion. Adaptive bone remodeling theory was applied to the open door laminoplasty model to understand the effect of the surgical procedure on the internal architecture of bone. Bone remodeling was implemented at the C5 vertebra by quantifying the changes in apparent bone density in terms of the mechanical stimulus (i.e. SED/density). After laminoplasty, the increased load distribution through the bony hinge region led to the increased bone density during extension. This increased bone density could eventually lead to bone formation in those regions through external remodeling. The current study proved laminoplasty to be a motion preservation technique wherein the plates and spacer provided additional stability via reconstruction of the laminar arch while laminectomy can cause instability of spine especially during flexion. In the future, patient-specific finite element models that incorporate geometry-related differences could be developed to optimize the number of operated levels and to further explain the effect of surgical procedure on the unaltered levels.