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Completed

NCT Number: NCT07780227

Laser Modification of Dental Implant Abutment Surfaces

Introduction: Tight soft tissue integration to the dental implants is essential to achieve a successful outcome of dental implants. Contamination by oral bacteria of the implant-mucosa interface can result in gingival recession, pocket formation, and bone resorption. There are many surface modification strategies to reinforce the soft tissue seal to dental implants. One of these strategies is laser technology. The aim of this study is to evaluate the effect of laser-induced roughness of titanium surfaces of final abutments on the connective tissue seal to the dental implant. Materials and Methods: Twenty-four pure titanium abutments of dental implants will be evaluated in this study. The abutments will be divided into 2 groups: group A will be treated with ND: YAG laser, and group B will not be treated with a laser as a control group. After 3 months, evaluation will be done by measuring peri-implant probing depth, modified gingival index, bleeding index, plaque index, and patient satisfaction.

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Key information

Conditions

Dental Implants

Age range

18 year and older

Sex eligibility

All sexes

Study type

Interventional

Phase

Not applicable

Primary location

Outpatient Clinic of Periodontology and Oral medicine Department, Faculty of Dentistry, Alexandria University, Egypt

Alexandria, Egypt

Who can participate

Healthy volunteers accepted: No

Only the study team can determine whether someone qualifies for participation.

Inclusion criteria

  • An informed consent will be signed from all the volunteers and they will be informed with all the steps, risk and benefits regarding the study.
  • Patients having osseointegrated implants ready to receive final abutment.

Exclusion criteria

  • The presence of chronic systemic disease.
  • Smoking of more than 10 cigarettes per day.
  • Bruxism habits.
  • Alcohol or drug abuse.
  • Poor oral hygiene.
  • Pregnancy

Treatment and study plan

ND: YAG laser

Other

This will include twelve titanium abutments treated by ND: YAG laser with an output power 4 W, representing 80mJ for a period of 5 seconds (20).

Machined abutment

Other

will include twelve abutments which will be left machined (as received from the manufacturer) to serve as controls.

Primary outcomes

  1. change in peri-implant probing depth

    Time frame: up to 3 months

    Desirable probing depths around dental implants are 2.5mm to 4mm. Peri-implantitis is often defined by the incidence of peri-implant probing depth ≥ 5 mm associated with bleeding on probing

Secondary outcomes

  1. change in Modified gingival index (MGI)

    Time frame: up to 3 months

    the scoring will be as follows: 0 = absence of inflammation,

    • = mild inflammation; slight change in color, little change in color; little change in texture of any portion of the marginal or papillary gingival unit,
    • = mild inflammation; criteria as above but involving the entire marginal or papillary gingival unit,
    • = moderate inflammation; glazing, redness, edema, and/or hypertrophy of the marginal or papillary gingival unit,
    • = severe inflammation; marked redness, edema and/or hypertrophy of the marginal or papillary gingival unit, spontaneous bleeding, congestion, or ulceration

  2. chaneg in Bleeding index (BI)

    Time frame: up to 3 months

    The Bleeding Index (modified Index of Saxton), will be performed by using a dental probe. The probe will be engaged approximately 1 millimetre (mm) into the gingival crevice. A moderate pressure will be used while sweeping. The scoring system is as follows: 0 = no bleeding after 30 seconds, 1 = bleeding upon probing after 30 seconds, 2 = immediate bleeding observed

  3. change in Plaque index

    Time frame: up to 3 months

    0 = no plaque. 1 = separate flecks of plaque at the cervical margin of the tooth. 2 = a thin continuous band of plaque (up to 1 mm) at the cervical margin of the tooth. 3 = a band of plaque wider than 1 mm but covering less than one-third of the crown of the tooth, 4= more than 1/3 but less than 2/3 of the tooth is covered with plaque , 5 indicated that more than 2/3 of the tooth surface is covered with plaque

  4. Patient satisfaction

    Time frame: up to 3 months

    Patient satisfaction will be assessed using a visual analogue scale (VAS)

Sponsors and collaborators

Lead sponsor

Alexandria University

Other

Registry information

Official study title

Impact of Surface Modification of Abutments of Dental Implants by Laser on Soft Tissue Seal (A Randomized Controlled Clinical Trial)

Important dates

Study start
2025
Primary completion
2025
Study completion
2025
First posted
Aug 21, 2026
Registry last updated
Aug 21, 2026

OpenTrials presents study information sourced from ClinicalTrials.gov. The official registry record should be consulted for the latest information.

View the official ClinicalTrials.gov record (opens in a new tab)

This listing is for discovery and informational purposes only. It is not medical advice, does not guarantee that a study is recruiting, and does not determine eligibility. Contact the study team and a qualified healthcare professional when considering participation.

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