BENEFITS OF USING THE 4 POSTERIOR SCALER The #4 Posterior Scaler is ideal for heavy calculus removal. Large deposits in the supragingival area can indicate more concerns on the subgingival level. Luckily, this stainless steel posterior scaler can manage both types of calculus, making for an all-around healthier smile. You can start by clearing away the supragingival calculus so you can see and loosen up what’s below. Then, you can begin working on periodontal scaling without changing instrumen