Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Liquid-Solid Phase Transition Alloy as Reversible and Rapid Molding Bone
  Cement   Bone cement has been demonstrated as an essential restorative material in the
orthopedic surgery. However current materials often imply unavoidable
drawbacks, such as tissue-cement reaction induced thermal injuries and
troublesome revision procedure. Here we proposed an injectable alloy cement to
address such problems through its liquid-solid phase transition mechanism. The
cement is made of a unique alloy BiInSnZn with a specifically designed low
melting point 57.5{\deg}C. This property enables its rapid molding into various
shapes with high plasticity. Some fundamental characteristics including
mechanical strength behaviors and phase transition-induced thermal features
have been measured to demonstrate the competence of alloy as unconventional
cement with favorable merits. Further biocompatible tests showed that this
material could be safely employed in vivo. In addition, experiments also found
the alloy cement capability as an excellent contrast agent for radiation
imaging. Particularly, the proposed alloy cement with reversible phase
transition feature significantly simplifies the revision of cement and
prosthesis. This study opens the way to implement alloy material as bone cement
to fulfill diverse clinical needs.

27
The categories of this paper are: comp-gas
14
The categories of this paper are: math-ph
9
The categories of this paper are: nlin
35
The categories of this paper are: mtrl-th
21
The categories of this paper are: adap-org
33
The categories of this paper are: plasm-ph
32
The categories of this paper are: atom-ph
2
The categories of this paper are: math
29
The categories of this paper are: funct-an
15
The categories of this paper are: nucl-ex
18
The categories of this paper are: econ
0
The categories of this paper are: hep-ph
11
The categories of this paper are: hep-lat
30
The categories of this paper are: q-alg
34
The categories of this paper are: chem-ph
25
The categories of this paper are: patt-sol