Ruslizam Daud
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Ruslizam Daud
Official Name
Ruslizam, Daud
Alternative Name
Daud, Ruslizam
Daud, R.
Main Affiliation
Scopus Author ID
24479667400
Researcher ID
F-5221-2010

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  • Publication
    Finite element analysis of proximal femur under static loading during sideway fall
    (AIP Publishing, 2023)
    Wong Kah Poh
    ;
    Fauziah Che Mat
    ;
    Fauzan Djamaluddin
    ;
    Masniezam Ahmad
    ;
    Nur Saifullah Kamaruddin
    ;
    Ruslizam Daud
    ;
    Ishak Ibrahim
    A femoral fracture happens when the femur gains a very high stress concentration during fall and may results in femur fracture. In fact, most of fall-related cases occur in sideways fall. Bone fracture leads to life quality impairment and even life threatening. In this study, the effect of quasi-static loading on the femur bone during sideway fall is investigated by employing Finite Element (FE) software, ANSYS. The FE model is developed and simulated in the different fall conditions; inclination angle of 10° and rotation angle from -20° to 30°. The capacity of the bone is evaluated in terms of von Mises stress and deformation. The highest stress concentration is found at femoral neck region. 30° rotation angle with 10° inclination angle is observed as the critical loading direction at which the femoral neck may results in fracture. The understanding of the effect of loading magnitude and direction on the femoral bone capacity obtained herewith is useful in assisting the medical practitioner to provide better treatment and reduce repeated treatment cases.
  • Publication
    Energy release rate analysis on the interface cracks of enamel-cement-bracket fracture using virtual crack closure technique
    ( 2017-10-29)
    Syafiq Farhan Samshuri
    ;
    Ruslizam Daud
    ;
    Mohd Afendi Rojan
    ;
    Fauziah Che Mat
    ;
    Khairul Salleh Basaruddin
    ;
    Rozita Hassan
    This paper presents the energy method to evaluate fracture behavior of enamel-cement-bracket system based on cement thickness. Finite element (FE) model of enamel-cement-bracket was constructed by using ANSYS Parametric Design Language (APDL). Three different thickness were used in this study, 0.05, 0.2, and 0.271 mm which assigned as thin, medium and thick for both enamel-cement and cement bracket interface cracks. Virtual crack closure technique (VCCT) was implemented as a simulation method to calculated energy release rate (ERR). Simulation results were obtained for each thickness are discussed by using Griffith's energy balance approach. ERR for thin thickness are found to be the lowest compared to medium and thick. Peak value of ERR also showed a significant different between medium and thick thickness. Therefore, weakest bonding occurred at low cement thickness because less load required to produce enough energy to detach the bracket. For medium and thick thickness, both increased rapidly in energy value at about the mid-point of the enamel-cement interface. This behavior occurred because of the increasing in mechanical and surface energy when the cracks are increasing. However, result for thick thickness are higher at mid-point compared to thin thickness. In conclusion, fracture behavior of enamel cracking process for medium most likely the safest to avoid enamel fracture and withstand bracket debonding.
      1  33
  • Publication
    A review of factors influencing peri-implant bone loss
    ( 2021-07-21)
    Muhammad Ikman Ishak
    ;
    Ruslizam Daud
    ;
    Ishak Ibrahim
    ;
    Fauziah Che Mat
    ;
    Nurul Najwa Mansor
    Dental implants report high survival rate for the treatment of patients with missing teeth and being one of the undeniable restoration techniques. However, peri-implant bone loss has recently arisen to be the highlight in contemporary implant therapy. Therefore, the possible causes that are detrimental to dental implants and surrounding tissues are important to be discovered. The present review focuses on the current etiologies of peri-implant bone loss and subsequent complications observed in clinical practices. A comprehensive literature search was conducted via PubMed, Scopus, and ScienceDirect databases using the related keywords. The literature reveals numerous etiological factors may initiate the loss of marginal bone in dental implant application: loading protocols, implant body placement, implant macro-design features, implant surface roughness, implantation site preparation, foreign body reaction, implant material particles detachment and contamination, and oral habit. Albeit the biomechanical, biological, or combination of factors are known to contribute in marginal bone resorption, the predictability of treatment modalities to handle the defect remains controversial and unclear. Further clinical trials and sophisticated quantitative assessment would be advantageous to help scrutinize the issue.
      31  2
  • Publication
    Biomechanical Overloading Factors Influencing the Failure of Dental Implants: A Review
    (Springer Science and Business Media, 2022-01-01)
    Muhammad Ikman Ishak
    ;
    Ruslizam Daud
    ;
    Ishak Ibrahim
    ;
    Fauziah Che Mat
    ;
    Mansor N.N.
    The increasing popularity of dental implants has led to an increase in the number of late implant failures. Although the failure of dental implants is rare, it produces a challenging clinical situation. Thus, the scope of causes that is detrimental to dental implants and peri-implant tissues is important to be explored. Inadequate forces resulting from occlusion may cause complications that leading to implant failure. It is found that the mechanical-related contributing factors (biomechanical overloading) significantly affect the implant persistence as compared to the biological factors. The present review, therefore, emphasises the causes of the overloaded dental implants and technical complications in clinical scenarios. A comprehensive search was performed via ScienceDirect, Scopus and PubMed databases using the related keywords. The literature indicates various factors could trigger biomechanical overloading and promote the occurrence of implant failures: parafunctional habits, implant diameter, length, thread shape and material and implant-abutment connection. The relationship between these factors and implant longevity is still controversial, with further randomised clinical trials and advanced quantitative assessments are required to help elucidate this issue.
      2  2
  • Publication
    Fracture behavior of intermetallic compound (IMC) of solder joints based on finite elements’ simulation result
    ( 2017-01-01)
    Eang Pang Ooi
    ;
    Ruslizam Daud
    ;
    Nasrul Amri Mohd Amin
    ;
    Fauziah Che Mat
    ;
    Sulaiman M.H.
    ;
    Mohd Shukry Abdul Majid
    ;
    Mohd Afendi Rojan
    ;
    Ahmad Kamal Ariffin
    The development of microelectronic industry has made solder joints failure a major reliability issue. From literature, many researchers have identified that intermetallic compounds (IMC) layer contribute greatly to the fracture of solder joint. This paper presents a finite element modeling of solder butt joints IMC layer failure based on displacement extrapolation method (DEM). Conceptual study on single edge crack of IMC solder joints is presented. A FE analytical model is proposed to be used in difference range of crack length to understand the fracture behavior of solder joint of IMC layer. The simulation results show that soldering material become less tough if greater crack length is present in the joint. It also seen that the thicker IMC has slightly reduced the stress intensity factor on the crack tip but the change from solder to IMC layer decrease the solder joint fracture toughness.
      1  32
  • Publication
    Temperature measurement methods in an experimental setup during bone drilling: A brief review on the comparison of thermocouple and infrared thermography
    ( 2021-12-14)
    Islam M.A.
    ;
    Nur Saifullah Kamarrudin
    ;
    Ruslizam Daud
    ;
    Ishak Ibrahim
    ;
    Anas Abdul Rahman
    ;
    Fauziah Che Mat
    Predicting thermal response in orthopedic surgery or dental implantation remains a significant challenge. This study aims to find an effective approach for measuring temperature elevation during a bone drilling experiment by analyzing the existing methods. Traditionally thermocouple has frequently been used to predict the bone temperature in the drilling process. However, several experimental studies demonstrate that the invasive method using thermocouple is impractical in medical conditions and preferred the thermal infrared (IR) camera as a non-invasive method. This work proposes a simplified experimental model that uses the thermocouple to determine temperature rise coupled with the thermal image source approach. Furthermore, our new method provides a significant opportunity to calibrate the thermal IR camera by finding out the undetected heat elevation in a workpiece depth.
      33  6