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This study aims to design and implement a multimaterial system for printing multifunctional specimens suitable for various sectors, with a particular focus on biomedical applications such as addressing mandibular bone loss.

To enhance both the mechanical and biological properties of scaffolds, an automatic multimaterial setup using vat photopolymerization was developed. This setup features a linear system with two resin vats and one ultrasonic cleaning tank, facilitating the integration of diverse materials and structures to optimize scaffold composition. Such versatility allows for the simultaneous achievement of various characteristics in scaffold design.

The printed multimaterial scaffolds, featuring 20 Wt.% hydroxylapatite (HA) on the interior and poly-L-lactic acid (PLLA) with 1 Wt.% graphene oxide (GO) on the exterior, exhibited favorable mechanical and biological properties at the optimum postcuring and heat-treatment time. Using an edited triply periodic minimal surface (TPMS) lattice structure further enhanced these properties. Various multimaterial specimens were successfully printed and evaluated, showcasing the capability of the setup to ensure functionality, cleanliness and adequate interface bonding. Additionally, a novel Gyroid TPMS scaffold with a nominal porosity of 50% was developed and experimentally validated.

This study demonstrates the successful fabrication of multimaterial components with minimal contaminations and suitable mechanical and biological properties. By combining PLLA-HA and PLLA-GO, this innovative technique holds significant promise for enhancing the effectiveness of regenerative procedures, particularly in the realm of dentistry.

The prolonged army rule in the country has affected the policymaking procedure of the state. Specifically, defence and foreign policies of the country are normally decided by the armed forces of Pakistan as per their own priorities, which is against the norms of democratic culture and supremacy of the civilian rule.

The control of important decision-making process in the hands of the armed forces has generated an arms race in the subcontinent. The major portion of the national budget is being spent on the defence forces and other sectors such as education and health and social welfare are not getting their due share from the revenue of the country. The continued sense of insecurity and animosity with neighbour countries, especially India, has resulted in speeding the acquisition of sophisticated arms in the country.

This research discusses the effects of the military's role in the decision-making of the country and its impacts on the relations between India and Pakistan. The confidence building measures and peacemaking process in South Asia is dependent on the attitude of the military of both the countries.