Analysis of osseointegration of implants with different macrogeometries: a randomized clinical trial

Not Applicable

• Conditions: Osseointegration; C05.500.480

• Registration Number: RBR-96n5x69
• Lead Sponsor: pontifícia universidade católica do paraná

Brief Summary

To verify the influence of macrogeometry with healing chambers on the osseointegration of dental implants, through the analysis of the implant stability quotient (ISQ) in addition to evaluate the correlation between insertion torque and insertion ISQ of implants with different macrogeometries. Thirty implants were installed in the posterior mandible of 15 patients, with sufficient bone height for the installation of implants measuring 3.5 mm in diameter and 9.0 mm in length. The implants had two types of macrogeometry: test group (GT) with 13 conical implants with healing chambers and control group (GC) with 13 conical implants with conventional threads. To insert the implants, a bone drilling protocol was used up to 3 mm in diameter with the last helical bur. The insertion torque of the implants was evaluated and then the ISQ at times 0 (T-0), 7 (T-7), 14 (T-14), 21 (T-21), 28 (T-28) and 42 (T-42) days. There was no significant difference between groups regarding insertion torque, with a mean value of insertion torque of 43 Ncm for both groups. For ISQ values, there was no difference between groups at the different times evaluated (p>0.05), except at T-7 (GT = 69.87?1.89 and GC = 66.48?4.49; p=0.01). There was no correlation between insertion torque and insertion ISQ (p>0.05). During the evaluated period, implants of 3.5 mm in diameter with macrogeometry, with or without healing chambers, inserted with a drilling protocol up to 3 mm in diameter of the last helical bur, obtained similar secondary stability, with no difference in ISQ values. Insertion torque did not correlate with insertion ISQ, providing similar primary stability to implants of both macrogeometries.

Detailed Description

Not available

Study Timeline

• Results First Posted: 1900-01-01
• Study Completion: 2022-09-01
• Study Start: 2023-06-19
• Last Update Posted: 26 June 2023

Recruitment & Eligibility

• Status: Data analysis completed
• Sex: Not specified
• Target Recruitment: Not specified

Inclusion Criteria

partial edentulous patients in the posterior region of the mandible requiring one implant in each half-arch or two implants in each half-arch;minimum bone height of 11 mm and minimum bone thickness of 5 mm in the posterior region of the bilateral mandible evaluated by means of cone beam computed tomography; sufficient prosthetic space for subsequent prosthetic rehabilitation

Exclusion Criteria

the need for some type of bone reconstruction or advanced surgery to allow the installation of the implant; patients who did not accept to be part of the study; patients with uncontrolled diabetes, considering glycated hemoglobin above 7.5%; smokers more than 10 cigarettes a day; use of oral or injectable bisphosphonates; immunodeficient patients; patients who underwent radiotherapy in the head and neck region for a period of less than five years before the beginning of the research; patients with another systemic condition that contraindicated performing oral surgery at the time or who had conditions that could interfere with the osseointegration process

Study & Design

• Study Type: Intervention
• Study Design: Not specified