Gingival displacement using diode laser or retraction cords: A comparative clinical study.

Area of Science:

• Dental materials science
• Prosthodontics
• Periodontology

Background:

• Accurate final impressions are crucial for fixed denture restorations.
• Gingival sulcus conditioning is essential for exposing the finish line.
• Traditional methods like retraction cords can be uncomfortable for patients.

Purpose of the Study:

• To compare the efficacy of gingival retraction cords (RC) versus diode laser (DL) for gingival sulcus conditioning.
• To evaluate the impact of these techniques on clinical crown height and gingival restoration.
• To assess operator ease and patient comfort during the procedures.

Main Methods:

• 74 abutments for complete crown restoration were randomized into RC and DL groups.
• Clinical crown height was measured at four time points: T0, T1, T2, and T3.
• Gingival retraction (ΔT2-T1) and restoration to baseline (ΔT3-T1) were calculated.
• Ease of technique, patient comfort, time, and bleeding were assessed using the Visual Analog Scale.

Main Results:

• No significant difference was found in the amount of gingival retraction between RC and DL (P=0.966).
• Gingival restoration to baseline was also similar between the two groups (P=0.286).
• Diode laser required significantly less time, was easier for the operator, and more comfortable for the patient (all P<0.001).

Conclusions:

• Both gingival retraction cords and diode laser are effective for gingival sulcus conditioning.
• Diode laser offers advantages in terms of time efficiency, ease of use, and patient comfort.
• Diode laser may be a preferable alternative to retraction cords for impression procedures.