Trial reportClinical implant dentistry and related research2026
Thread Depth Effects on Stability and Positional Accuracy in Guided Immediate Implants: A Randomized Controlled Trial.
Trial report in Clinical implant dentistry and related research, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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6 authors.
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Abstract
objectivesTo evaluate the influence of implant thread depth on implant stability and positional accuracy in fully guided immediate implant placement. MATERIALS AND
methodsFifty-four patients received a reference tapered (BLT), a standard-thread (MST), or a deep-thread implant (MDT). Fifty-four implants were placed using fully guided surgery and evaluated over 1-year follow-up. Primary outcomes were implant stability (insertion torque, ISQ, ISV). Secondary outcomes included positional accuracy and marginal bone level (MBL) at 12 months.
resultsPrimary and longitudinal stability were comparable across groups. Insertion torque was highest for MDT implants, followed by MST and BLT implants (BLT: 35.28 ± 11.18; MST: 40.00 ± 11.88; MDT: 43.89 ± 10.92 Ncm; p = 0.062). A higher proportion of MDT implants achieved insertion torque ≥ 40 Ncm (MDT: 14/18; MST: 12/18; BLT: 8/18). Angular deviation differed among implant groups (MDT: 5.57° ± 3.71°; BLT: 4.73° ± 2.46°; MST: 3.58° ± 1.81°; p = 0.062). In subgroup analysis comparing implants differing only in thread depth (MST vs. MDT), angular deviation was significantly greater for MDT (p = 0.029), particularly in molar sites. At 12 months, MBL did not differ significantly among groups.
conclusionsIn fully guided immediate implant placement, deeper-thread implants showed higher insertion torque values but were associated with greater angular deviation, while longitudinal stability and marginal bone levels remained comparable. Deeper-thread designs may be beneficial when enhanced primary stability is required, provided careful angulation control is ensured.
trial registrationcris.nih.go.kr Identifier: KCT0009402; This clinical trial was not registered prior to participant recruitment and randomization.
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