how to convert svg to image and save to database

svg code

<svg class="teeth" 
 width="400px" height="300px" viewBox="0 0 400 300" preserveAspectRatio="xMidYMid meet">
    <!-- upper right 8 -->
    <g id="molar-group" class="molar">
        <rect x="75" y="75" stroke="black" id="disto-occlusal" style="stroke-width: 5px;" width="125" height="150" fill="white"/>
        <rect x="200" y="75" stroke="black" id="mesio-occlusal" style="stroke-width: 5px;" width="125" height="150" fill="white"/>

        <polygon stroke="black" id="disto-buccal" style="stroke-width: 5px;" points="0 0 200 0 200 75 75 75" fill="white" />
        <polygon stroke="black" id="mesio-buccal" style="stroke-width: 5px;" points="200 0 400 0 325 75 200 75" fill="white" />

        <polygon stroke="black" id="mesial" style="stroke-width: 5px;" points="400 0 400 300 325 225 325 75" fill="white" />

        <polygon stroke="black" id="mesio-palatal" style="stroke-width: 5px;" points="400 300 200 300 200 225 325 225" fill="white" />
        <polygon stroke="black" id="disto-palatal" style="stroke-width: 5px;" points="200 300 0 300 75 225 200 225" fill="white" />

        <polygon stroke="black" id="distal" style="stroke-width: 5px;" points="0 300 0 0 75 75 75 225" fill="white" />
    </g>
</svg>

how to convert the SVG to image and save to the database .....................................................