WITHDRAWN: Interventions for replacing missing teeth: 1- versus 2-stage implant placement

Area of Science:

• Dental Implantology
• Surgical Procedures
• Prosthodontics

Background:

• Dental implants can be placed using a one-stage (mucosa penetrating) or two-stage (submerged) procedure.
• The two-stage approach minimizes risks of premature loading but requires a second surgery and extends treatment time.

Purpose of the Study:

• To compare the effectiveness of one-stage versus two-stage dental implant placement procedures.

Main Methods:

• A systematic review and meta-analysis of randomized controlled trials (RCTs) was conducted.
• Searches included Cochrane Oral Health Group's Trials Register, CENTRAL, MEDLINE, and EMBASE, with additional handsearching and contact with manufacturers.
• Five RCTs with 239 patients were included, analyzing prosthesis failures, implant failures, marginal bone loss, patient preference, aesthetics, and complications.

Main Results:

• No statistically significant differences were found in prosthesis or implant failures between one-stage and two-stage procedures on a per-patient basis.
• Trends suggested a potential benefit for the two-stage (submerged) approach in fully edentulous patients.

Conclusions:

• The limited number of patients in included trials prevents definitive conclusions.
• One-stage procedures may be advantageous for partially edentulous patients due to fewer surgical interventions and shorter treatment times.
• Two-stage procedures might be preferred for implants with suboptimal primary stability, cases requiring guided tissue regeneration, or when excessive forces on abutments are anticipated in fully edentulous patients.