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CompletedNCT04854239Updated Apr 22, 2021

Accuracy of Half-guided Implant Placement

A Phase 4 interventional study of Half-guided implant placement in Partial-edentulism, sponsored by Semmelweis University. Completed at 1 site in Hungary. Open to participants aged 29 Years to 67 Years, including healthy volunteers. Per ClinicalTrials.gov, last updated 2021-04-22.

Sponsored by Semmelweis University · Phase 4, Interventional, and Treatment

From the registry’s dates

  • Registered 4 years 3 months after the study started (first participant enrolled Jan 2017, registered Apr 2021).
Phase
Phase 4
Study type
Interventional
Enrollment
40
Allocation
Randomized
Ages
29 Years to 67 Years
Sex
All
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Study summary

The aim of the present prospective randomized controlled study is to compare the accuracy of implant placement performed either with a surgical motor or a torque wrench as part of a half-guided surgical protocol after maxillary sinus floor augmentation.

Read the detailed description

Implant insertion with half-guided surgical protocol was utilized by surgical motor (machine-driven group) or torque wrench (manual group) in the maxilla. Forty patients were randomly divided in two study groups; 20 implants were inserted with a surgical motor and 20 implants with a torque wrench. After the healing period, accuracy comparison method between planned and actual implant positions was performed based on digital intraoral scan. Coronal, apical and angular deviation parameters, insertion time and maximum insertion torque was evaluated.

02

Conditions studied

  • Partial-edentulism

Keywords

  • dental implants
  • computer-assisted surgery
  • guided surgery
  • accuracy
  • machine driven implant insertion
  • manual implant insertion
03

In context

Lead sponsor

Semmelweis University is the lead sponsor of 136 studies on the registry; 54 are open to participants now.

Counted across the registry records on this site, refreshed daily.

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Who can participate

Ages eligible
29 Years to 67 Years
Sexes eligible
All
Accepts healthy volunteers
Yes

Inclusion criteria

  • at least one edentulous maxillary premolar or molar site treated successfully by sinus floor elevation with a xenogenic bone substitute (cerabone, botiss biomaterials, Zossen, Germany) confirmed by preoperative cone-beam computed tomography
  • full- mouth plaque and bleeding scores (FMPS and FMBS) \<20%
  • good patient compliance (including willingness to participate in the follow-up procedures)
  • signed informed consent

Exclusion criteria

Exclusion Criteria:

  • clinically relevant diseases (e.g.: diabetes, rheumatism, cancer)
  • systemic steroid or bisphosphonate use
  • acute or chronic inflammatory processes
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Study design

Phase
Phase 4
Primary purpose
Treatment
Allocation
Randomized
Intervention model
Parallel assignment
Masking
Double (Participant, Outcomes assessor)
Enrollment
40 participants (actual)

Study arms

  • Experimental
    Machine-driven group

    In the machine-driven group, after guided implant bed preparation, implant insertion was performed with contra-angled handpiece.

    Procedure: Half-guided implant placement

  • Experimental
    Manual group

    In the manual group, after guided implant bed preparation, implant insertion was performed with torque-wrench.

    Procedure: Half-guided implant placement

Interventions

  • ProcedureHalf-guided implant placement

    The surgery was performed under local anaesthesia in both groups, half-guided implant placement was carried out based on randomization.

    Also known as: Guided implant placement

06

What researchers measure

Primary outcomes

  1. Global coronal implant position deviation

    Measurement: comparison of planned and actual implant position in a virtual model. Tool: Linear measurement with Amira 5.4.0 (Thermo Fisher Scientific, USA). Unit: mm

    Time frame: 3 months after implant placement

  2. Global apical implant position deviation

    Measurement: comparison of planned and actual implant position in a virtual model. Tool: Linear measurement with Amira 5.4.0 (Thermo Fisher Scientific, USA). Unit: mm

    Time frame: 3 months after implant placement

  3. Horizontal coronal implant position deviation

    Measurement: comparison of planned and actual implant position in a virtual model. Tool: Linear measurement with Amira 5.4.0 (Thermo Fisher Scientific, USA). Unit: mm

    Time frame: 3 months after implant placement

  4. Horizontal apical implant position deviation

    Measurement: comparison of planned and actual implant position in a virtual model. Tool: Linear measurement with Amira 5.4.0 (Thermo Fisher Scientific, USA). Unit: mm

    Time frame: 3 months after implant placement

  5. Angular implant position deviation

    Measurement: comparison of planned and actual implant position in a virtual model. Tool: Linear measurement with Amira 5.4.0 (Thermo Fisher Scientific, USA). Unit: mm

    Time frame: 3 months after implant placement

Secondary outcomes

  1. Implant insertion torque

    Measurement: Insertion torque. Tool: torque wrech Unit: Ncm

    Time frame: During implant insertion

  2. Implant insertion torque

    Measurement: Insertion torque. Tool: surgical motor Unit: Ncm

    Time frame: During implant insertion

  3. Duration of implant insertion

    Measurement: Duration of implant insertion Tool: stopwatch Unit: seconds

    Time frame: During implant insertion

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Study locations

1 site
  • Semmelweis University Department of Periodontology
    Budapest, 1088, Hungary
08

References and documents

Publications

  • Orban K, Varga E Jr, Windisch P, Braunitzer G, Molnar B. Accuracy of half-guided implant placement with machine-driven or manual insertion: a prospective, randomized clinical study. Clin Oral Investig. 2022 Jan;26(1):1035-1043. doi: 10.1007/s00784-021-04087-0. Epub 2021 Aug 16. PubMed 34401946 ↗

Individual participant data

Plan to share: No

09

Updates

Tracking since Sep 25, 2026
No changes since tracking began. The registry record was last updated on Apr 22, 2021, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
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Registry details

Key details

Study ID
NCT04854239
Lead sponsor
Semmelweis University
Collaborators
NSK Europe GmbH, Botiss Medical AG, Institut Straumann AG, Dicomlab Kft., Hungarian Human Resources Development Operational Program (EFOP-3.6.2-16-2017-00006), Excellence Program of the Ministry for Innovation and Technology in Hungary
Responsible party
Balint Molnar (Dr. Balint Molnar DMD, PhD, associate professor, Semmelweis University) — Principal investigator
First posted
Apr 22, 2021
Start date
Jan 1, 2017
Primary completion
Jan 31, 2019
Completion
Jan 31, 2019
Last update
Apr 22, 2021

Oversight

Data monitoring committee
No
FDA-regulated drug
No
FDA-regulated device
No
View the source record on ClinicalTrials.gov ↗

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