The goal of this randomized placebo-controlled split-mouth clinical trial is to determine whether aromatherapy using lemongrass essential oil can reduce pain, dental anxiety, and physiological stress responses during orthodontic extraction of maxillary premolars . The main questions it aims to answer are: * Does aromatherapy reduce pain perception during and after tooth extraction as measured by the Visual Analog Scale (VAS)? * Does aromatherapy reduce dental anxiety and improve oral health-related quality of life during the extraction procedure as measured by the Modified Dental Anxiety Scale (MDAS-DEP) and Oral Health Impact Profile-14 (OHIP-14)?
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Pain perception during and after tooth extraction
Timeframe: Peri-procedural (during local anesthesia administration and forceps application), and at 2 hours, 12 hours, 24 hours, and 48 hours post-procedure
Dental anxiety during extraction procedure
Timeframe: Baseline (pre-procedure) and immediately post-procedure (within 30 minutes after extraction)
Oral health-related quality of life following extraction
Timeframe: 24 hours post-procedure