Bone Healing at Non-submerged Implants Installed With Different Insertion Torques.

Overview

The objective of the study is to evaluate histomorphometrically the healing at implants installed with standard or very low insertion torque values.

Full Title of Study: “Bone Healing at Non-submerged Implants Installed With Different Insertion Torques. A Split Mouth Histomorphometric Randomized Controlled Trial.”

Study Type

  • Study Type: Interventional
  • Study Design
    • Allocation: Randomized
    • Intervention Model: Parallel Assignment
    • Primary Purpose: Treatment
    • Masking: Triple (Participant, Investigator, Outcomes Assessor)
  • Study Primary Completion Date: November 22, 2016

Detailed Description

Very high insertion torque values have been recommended when immediate loading is applied to implants.1 However, it has been shown that similar clinical outcomes may be achieved even with insertion torque values ≤15 Ncm when implants are splinted together. Due to the contradictory outcomes on the influence of the torque on osseointegration and a lack of histological data in humans, there is a need of more evidences that may support the clinicians in the decision making when an unintentional low insertion torque occur at implants during the daily practice. So the aim of the study i evaluate histomorphometrically the healing at implants installed in Twelve volunteer patients that will be recruited. Two screw-shaped titanium devices will be installed in the distal segments of the mandible using insertion torque values of either <10 Ncm or ~30 Ncm. The implants were left to heal in a non-submerged fashion. After 8 weeks, biopsies will be retrieved and ground sections will be prepared for histological evaluation.

Interventions

  • Procedure: implant installation
    • All site preparations will be performed deeper compared to the length of the implant so that the implant apex cannot reach the bottom of the osteotomy.

Arms, Groups and Cohorts

  • Experimental: Test site (torque of <10 Ncm)
    • The test sites (<10 Ncm) will be over-prepared with drills of larger diameter
  • Other: Control site (torque of ~30 Ncm)
    • the standard sites (~30 Ncm)will be prepared with the corresponding drills suggested by the manufacturer

Clinical Trial Outcome Measures

Primary Measures

  • New bone in contact with the implant surface
    • Time Frame: After 8 weeks of healing
    • The percentages of new bone will be evaluated both in contact with the implant surface

Secondary Measures

  • Bone density around the implant surface
    • Time Frame: After 8 weeks of healing
    • The total mineralized bone will be assessed as sum of new and old bone

Participating in This Clinical Trial

Inclusion Criteria

  • presence of at least two edentulous zone in the posterior segment of the mandible – ≥ 25 years of age – smoking ≤ 10 cigarettes per day – Good general health – No contraindication for oral surgical procedures. – Not being pregnant. Exclusion Criteria:

  • Presence of systemic disorders – Chemotherapy or radiotherapy; – Smokers >10 cigarettes per day – Previous bone augmentation procedures in the region

Gender Eligibility: All

Minimum Age: 25 Years

Maximum Age: 70 Years

Are Healthy Volunteers Accepted: Accepts Healthy Volunteers

Investigator Details

  • Lead Sponsor
    • ARDEC Academy
  • Provider of Information About this Clinical Study
    • Sponsor

Citations Reporting on Results

Trisi P, Todisco M, Consolo U, Travaglini D. High versus low implant insertion torque: a histologic, histomorphometric, and biomechanical study in the sheep mandible. Int J Oral Maxillofac Implants. 2011 Jul-Aug;26(4):837-49.

Cesaretti G, Botticelli D, Renzi A, Rossi M, Rossi R, Lang NP. Radiographic evaluation of immediately loaded implants supporting 2-3 units fixed bridges in the posterior maxilla: a 3-year follow-up prospective randomized controlled multicenter clinical study. Clin Oral Implants Res. 2016 Apr;27(4):399-405. doi: 10.1111/clr.12565. Epub 2015 Feb 9.

Gallucci GO, Benic GI, Eckert SE, Papaspyridakos P, Schimmel M, Schrott A, Weber HP. Consensus statements and clinical recommendations for implant loading protocols. Int J Oral Maxillofac Implants. 2014;29 Suppl:287-90. doi: 10.11607/jomi.2013.g4. No abstract available.

Pantani F, Botticelli D, Garcia IR Jr, Salata LA, Borges GJ, Lang NP. Influence of lateral pressure to the implant bed on osseointegration: an experimental study in dogs. Clin Oral Implants Res. 2010 Nov;21(11):1264-70. doi: 10.1111/j.1600-0501.2010.01941.x.

Rea M, Lang NP, Ricci S, Mintrone F, Gonzalez Gonzalez G, Botticelli D. Healing of implants installed in over- or under-prepared sites–an experimental study in dogs. Clin Oral Implants Res. 2015 Apr;26(4):442-446. doi: 10.1111/clr.12390. Epub 2014 Mar 31.

Rea M, Botticelli D, Ricci S, Soldini C, Gonzalez GG, Lang NP. Influence of immediate loading on healing of implants installed with different insertion torques–an experimental study in dogs. Clin Oral Implants Res. 2015;26(1):90-5. doi: 10.1111/clr.12305. Epub 2013 Dec 9.

Barone A, Alfonsi F, Derchi G, Tonelli P, Toti P, Marchionni S, Covani U. The Effect of Insertion Torque on the Clinical Outcome of Single Implants: A Randomized Clinical Trial. Clin Implant Dent Relat Res. 2016 Jun;18(3):588-600. doi: 10.1111/cid.12337. Epub 2015 Jun 5.

Verardi S, Swoboda J, Rebaudi F, Rebaudi A. Osteointegration of Tissue-Level Implants With Very Low Insertion Torque in Soft Bone: A Clinical Study on SLA Surface Treatment. Implant Dent. 2018 Feb;27(1):5-9. doi: 10.1097/ID.0000000000000714.

Verrastro Neto A, Andrade R, Correa MG, Casarin RCV, Casati MZ, Pimentel SP, Ribeiro FV, Cirano FR. The impact of different torques for the insertion of immediately loaded implants on the peri-implant levels of angiogenesis- and bone-related markers. Int J Oral Maxillofac Surg. 2018 May;47(5):651-657. doi: 10.1016/j.ijom.2017.11.001. Epub 2017 Nov 23.

Duyck J, Corpas L, Vermeiren S, Ogawa T, Quirynen M, Vandamme K, Jacobs R, Naert I. Histological, histomorphometrical, and radiological evaluation of an experimental implant design with a high insertion torque. Clin Oral Implants Res. 2010 Aug;21(8):877-84. doi: 10.1111/j.1600-0501.2010.01895.x. Epub 2010 Apr 30.

Duyck J, Roesems R, Cardoso MV, Ogawa T, De Villa Camargos G, Vandamme K. Effect of insertion torque on titanium implant osseointegration: an animal experimental study. Clin Oral Implants Res. 2015 Feb;26(2):191-6. doi: 10.1111/clr.12316. Epub 2013 Dec 11.

Muktadar AK, Gangaiah M, Chrcanovic BR, Chowdhary R. Evaluation of the effect of self-cutting and nonself-cutting thread designed implant with different thread depth on variable insertion torques: An histomorphometric analysis in rabbits. Clin Implant Dent Relat Res. 2018 Aug;20(4):507-514. doi: 10.1111/cid.12611. Epub 2018 Apr 16.

Berardini M, Trisi P, Sinjari B, Rutjes AW, Caputi S. The Effects of High Insertion Torque Versus Low Insertion Torque on Marginal Bone Resorption and Implant Failure Rates: A Systematic Review With Meta-Analyses. Implant Dent. 2016 Aug;25(4):532-40. doi: 10.1097/ID.0000000000000422.

Balshi SF, Wolfinger GJ, Balshi TJ. A retrospective analysis of 44 implants with no rotational primary stability used for fixed prosthesis anchorage. Int J Oral Maxillofac Implants. 2007 May-Jun;22(3):467-71.

Rodrigo D, Aracil L, Martin C, Sanz M. Diagnosis of implant stability and its impact on implant survival: a prospective case series study. Clin Oral Implants Res. 2010 Mar;21(3):255-61. doi: 10.1111/j.1600-0501.2009.01820.x. Epub 2009 Dec 4.

Caneva M, Lang NP, Calvo Guirado JL, Spriano S, Iezzi G, Botticelli D. Bone healing at bicortically installed implants with different surface configurations. An experimental study in rabbits. Clin Oral Implants Res. 2015 Mar;26(3):293-9. doi: 10.1111/clr.12475. Epub 2014 Sep 15.

Ferri M, Lang NP, Angarita Alfonso EE, Bedoya Quintero ID, Burgos EM, Botticelli D. Use of sonic instruments for implant biopsy retrieval. Clin Oral Implants Res. 2015 Nov;26(11):1237-43. doi: 10.1111/clr.12466. Epub 2014 Aug 11.

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