The Impact of Thread Length on Implant Stability

Status

Completed

Phases

Study type

Interventional

Source

ClinicalTrials.gov

Registry ID

NCT05141851

Enrollment

Registered

2021-12-02

Start date

2018-06-19

Completion date

2020-06-15

Last updated

2021-12-02

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Implant Stability

Keywords

implant stability; implant threads

Brief summary

Some studies show that different types of threads in tapered implants result in differences in primary stability. The aim of this study is to a perform a prospective, controlled, randomized clinical trial comparing primary and secondary stability between long and standard thread implants in the treatment of partial edentulous patients.

Detailed description

The study sample consists of 23 maxillary partial edentulous patients, where 32 implants were placed, with threads of 0.7 mm or 0.3 mm in the location of premolars and molars. The comparison, in terms of primary stability, is made by measuring the ISQ value (implant stability quotient), in four locations (buccal, palatal, mesial and distal). Statistical analysis was performed using the independent T-Test.

Interventions

DEVICEImplants with 0,7 mm threads

Implants were placed, with threads of 0.7 mm in the location of premolars and molars.

DEVICEImplants with 0.3 mm threads

Implants were placed, with threads of 0.3 mm in the location of premolars and molars.

Study design

Allocation

RANDOMIZED

Intervention model

PARALLEL

Primary purpose

TREATMENT

Masking

SINGLE (Subject)

Eligibility

Sex/Gender

ALL

Age

18 Years to No maximum

Healthy volunteers

Yes

Inclusion criteria

* Minimum 18 years; * No systemic conditions that contraindicate surgery; * Periodontal health or periodontal disease treated as part of a periodontal support program and having a high level of plaque control; * Partial edentulous patients, in the upper jaw, specifically in the location of premolars and molars;

Exclusion criteria

* Patients with insufficient quantity of bone for implant placement without bone regeneration procedures; * Patients who underwent medication that could affect stability and osteointegration up to 3 months prior to study initiation; * Patients with untreated periodontal pathology or who have not followed periodontal supportive treatment; * Smokers, Pregnant or lactating women.

Design outcomes

Primary

Measure	Time frame	Description
primary dental implant stability	On the 1 day of implants placement	measuring the ISQ value (implant stability quotient)

Countries

Portugal

Outcome results

None listed

Source: ClinicalTrials.gov · Data processed: Feb 4, 2026