Effects of Implant Placement Depth (4 mm Versus 6 mm) on Crestal Bone Stability in Immediate Implant Placement: A Clinical Study With 1-Year Post-Restorative Results

Tomas Linkevicius35 enrolled

Overview

The aim of a study was to analyze the effect of implant placement depth (4 mm versus 6 mm below the mid-facial gingival margin) on marginal bone loss (MBL) around implant and implant stability during immediate implant placement after tooth extraction. Clinical trial was conducted involving 35 patients requiring immediate implant placement after tooth extraction. Implants were placed either 4 mm (control group) or 6 mm (test group) below the mid-facial gingival margin. Primary outcome was deemed to be radiographic assessment of marginal bone level from periapical radiographs. Secondary outcome was implant stability quotient registration using resonance freaquency analyzer. The null hypothesis is that there is no significant difference in peri-implant marginal bone loss between implants placed at 4 mm depth versus 6 mm depth relative to the buccal gingival margin during immediate implant placement.

Study Type

INTERVENTIONAL

Allocation

NON_RANDOMIZED

Purpose

TREATMENT

Masking

SINGLE

Enrollment

Conditions

Dental Implant Tooth Extractions Marginal Bone Loss Around Implants

Interventions

Implants were positioned 4 mm below the mid-facial gingival marginPROCEDURE

Tooth was carefully extracted and implant was placed 4 mm below free gingival margin of the extracted tooth.

Implant was placed 6 mm below free gingival marginPROCEDURE

Tooth was extracted and dental implant placed 6 mm below free gingival margin of the extracted tooth.

Eligibility

Sex: ALLMin age: 18 Years

Medical Language ↔ Plain English

Inclusion Criteria: 1\) age ≥ 18 years; (2) generally healthy individuals with no medical contraindications for implant surgery; (3) healthy soft tissue, indicated by bleeding on probing (BOP) \< 20% and Plaque Index (PI) \< 25%; (4) keratinized gingiva ≥ 2 mm, both buccally and lingually; (5) presence of molar or premolar in the upper or lower jaw; (6) implant primary stability ≥ 35 Ncm; (7) intact alveolar bone walls post-extraction; (8) one study implant per patient; and (9) signed informed consent with permission to utilize data for research purposes Exclusion Criteria: (1) smoking (≥ 10 cigarettes/day); (2) history of uncontrolled periodontitis; (3) uncontrolled diabetes or alcoholism; (4) medications known to impair healing; and (5) implant primary stability \< 35 Ncm

Outcomes

Primary Outcomes

Marginal bone loss around dental implant

Time frame: From implant restoration delivery till 1 year follow-up

Secondary Outcomes

Implant stability quotient

Time frame: After implant placement and after 4 months