Comparison of second molar protraction using different timing for piezocision application: A randomized clinical...

Area of Science:

• Orthodontics and Dental Surgery
• Periodontal Accelerated Osteogenesis

Background:

• Second molar protraction is a common orthodontic technique.
• Piezocision is a surgical intervention to accelerate tooth movement.

Purpose of the Study:

• To compare the efficacy of early, late, and no piezocision on second molar protraction.
• To evaluate the impact of piezocision timing on space closure duration and anchorage loss.

Main Methods:

• Forty subjects with extracted mandibular first molars were divided into piezocision and no piezocision groups.
• The piezocision group was further divided into early (immediate) and late (3 months post-protraction) subgroups.
• Measurements included second molar protraction, space closure duration, and anterior anchorage loss, analyzed using ANOVA.

Main Results:

• No significant difference in molar protraction between early and late piezocision groups.
• Piezocision reduced space closure duration by approximately one month (9 vs. 10 months).
• Anchorage loss was comparable across all three groups (early piezocision, late piezocision, no piezocision).

Conclusions:

• Early and late piezocision yield similar outcomes for second molar protraction.
• Piezocision offers a temporary boost in protraction within the initial 2-3 months post-surgery.
• Piezocision effectively reduces the overall duration of mandibular first molar space closure without compromising anchorage.