Posterior Atrophic MaxillaNCT07417293
Clinical and Patient Outcomes of 4 mm Ultra-Short vs. 8 mm Implants With Bone Augmentation in the Back Upper Jaw
A study testing Ultra short implants and Long implants with bone augmentation in people with Posterior Atrophic Maxilla, run by Universitat Internacional de Catalunya.
Trial summary
This study aims to compare 2 different groups of patients with both a healed site in the upper posterior sector after extractions, one treated with ultra-short implants, and another with long implants with bone regeneration. Read more about this study
- Who is it for?
- Ages 18 years and older
- Conditions the study is for
- Posterior Atrophic Maxilla
- What is being tested?
- Ultra short implants and Long implants with bone augmentation
- Type of treatment
- Medical device
- Could I receive a placebo?
- No, everyone receives an active treatment
- How many people
- 35 participants
- Where
- No sites listed yet
- Study dates
- 20 Feb 2026to 1 Jul 2029
- Phase
- Interventional
- Are there results?
- Not yet: the study is under way
Key requirements
Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.
- Ages 18 years and older
- All sexes
- No healthy volunteers
- Adult, Older adult
Who may be able to join
- Inform consent signed.
- Adult patients (≥18 years old).
- No pregnant women or without the desire to stay.
- Periodontal and peri-implant health in a pristine or reduced periodontium.
- Full mouth plaque score < 20% (O'Leary, 1972)
- Maxillary multiple posterior maxillary healed sites at least 4 months after extraction (with antagonist teeth with a good prognosis (Lindhe et al. 2008)) presenting ≥ 6.5 mm of bone width and 5-6 mm in height from the bone crest to the floor of the sinus.
- Need for a multiple splinted implant supported restoration with distal adjacent teeth or distal free-end in the posterior maxilla
Who cannot join
- Patients with uncontrolled systemic diseases.
- Smoker patients (≥10 cig/day).
- Patients taking medications that affect bone metabolism or immunologic disorders.
- Patients allergic to penicillin.
- Patients presenting acute or chronic maxillary sinus lesions.
- Advanced vertical crestal bone atrophy in the posterior maxilla (Type V and IV, Cawood-Howell Classification)
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- Vertical space of < 6 mm for a screw-retained implant restoration.
- Patients referring allergy to titanium or to any component of the implant/restoration.
- No previous attempts of implant installation in the same surgical site.
- Pregnant or lactating women.
- Patients willing to start or in course of an orthodontic therapy.
About this study
Official title: Clinical- and Patient-related Outcomes of 4 mm Ultra-short Implants Compared to 8 Mm-long Implants With Bone Augmentation for the Rehabilitation of Posterior Atrophic Maxilla: a Randomized Controlled Clinical Trial.
This study aims to compare 2 different groups of patients with both a healed site in the upper posterior sector after extractions, one treated with ultra-short implants, and another with long implants with bone regeneration. The objective is to evaluate if short-implants are superior in terms of better clinical outcomes, survival rates and safety, reduced surgical time, postoperative discomfort, and complication risk compared to conventional implants and bone regeneration.
- Conditions
- Posterior Atrophic Maxilla
- Being tested
- Ultra short implants, Long implants with bone augmentation
What participants receive
What participants receive. In a randomised study each person is assigned to one group by chance.
Ultra short implantsDevice
Placement of an ultra short implant of 4mm in the posterior atrophic maxilla without any bone regeneration procedure
Long implants with bone augmentationDevice
Placement of long implants of 8mm in the posterior atrophic maxilla alongside bone augmentation
| Study group | Role | What they receive |
|---|---|---|
| ultra-short implants | Experimental | 4mm long implants Receives: Device: Ultra short implants |
| long implants with bone augmentation | Other | 8mm long implants after transcrestal sinus floor elevation with bone augmentation Receives: Device: Long implants with bone augmentation |
What is being measured
The primary outcome is the main question the study is designed to answer.
Satisfaction of the surgical procedure
The patient is gonna make a subjective assessment of satisfaction of the surgery once it is finished. For that, we are going to use a 10 centimeter visual analog scale. The extremes of the scale are the extreme expressions of satisfaction, where the extreme left represents a 0 (not satisfied) and 10 (very satisfied). The patient won't have numbers between 0-10 so he will not be influenced by them. Wherever he marks, we will measure it and it will represent in centimeters how was his satisfaction
Measured: The day of the intervention after the surgery is finalized
Secondary outcomes (13)
Surgical time
elapsed time since the administration of local anesthesia until the placement of the last suture knot, with a scale of the exact minutes
Measured: at the day of the intervention, since the administration of the anesthesia until the placement of the last suture knot
Pain Intensity
Subjective assessment of pain intensity using a 10-cm visual analog scale. The extremes of the scale are the extreme expressions of pain
Measured: Since the day of the intervention once the surgery is finalized , until the 7th day after the surgery, each day of the following 7 days
Rescue medication
The need to intake rescue medication of Ibuprofen 600mg, Paracetamol 650mg or Amoxicilin 500mg with a nominal response of Yes or No
Measured: After the surgery during the next 7 days
Intra-surgical complications
Any undesired event that happens during the surgical procedure, for example, profuse bleeding, Schneider membrane perforation, by a categorical nominal answer Yes or No
Measured: The day of the surgery
Post-surgical complications
Any undesired event that happens during the first week of healing
Measured: 7 days after the surgery
Implant survival
If the implant is present in the mouth regardless of the biological or technical complications. An implant will be considered as failed if explantation is needed for the following reasons: (i) lateral, vertical mobility or rotation; (ii) drastic decrease in the ISQ values over time; (iii) discomfort or pain; and (iv) peri-implant radiolucency compatible with fibrointegration. It will be evaluated in a categorical nominal answer Yes or No
Measured: From 10 weeks after surgery to 36 months, after restoration delivery
Marginal bone level changes
distance from the mucosal margin to the base of the peri-implant pocket as measured with a PCP UNC 15 periodontal probe. By a mm scale
Measured: The day of the surgery, 12 months after and 36 months after
Probing pocket depth
distance from the mucosal margin to the base of the peri-implant pocket as measured with a PCP UNC 15 periodontal probe. Scale in mm.
Measured: 12 months after surgery and 36 months after surgery
Bleeding on probing
: presence or absence of bleeding when performing the peri-implant probing. By a categorical nominal answer Yes or No
Measured: 12 months and 36 months after surgery
Suppuration on probing
Presence or absence of suppuration when performing the peri- implant probing. By a categorical nominal answer Yes or No
Measured: 12 months and 36 months after surgery
Keratinized mucosa width
distance from the mucogingival line to the peri-implant mucosal margin in the buccal site as measured with a PCP UNC 15 periodontal probe. In a mm scale
Measured: 12 months and 36 months after surgery
Soft tissue dehiscence
exposure of any of the abutment or implant components, by a categorical nominal answer Yes or No
Measured: 12 months and 36 months after surgery
Prosthetic complications
Any undesired event in the prosthetic component (abutment or crown), for example, screw loosening, ceramic chipping
Measured: 12 months and 36 months after surgery
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted18 Feb 2026
- Study start20 Feb 2026 (estimated)
- Primary completion1 Jul 2028 (estimated)
- Study completion1 Jul 2029 (estimated)
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Other trials for Posterior Atrophic MaxillaStudies of the same condition, open and under way.
- What the trial phases meanHow a treatment moves from first tests in people to approval.
More details
For doctors and researchers: how the study is designed, who runs it, and its registry IDs.
Study design
- Study type
- Interventional
- Phase
- Phase N/A
- Primary purpose
- Treatment
- Allocation
- Randomised
- Intervention model
- Parallel groups
- Masking
- None (open label)
- Enrolment
- 35 participants (estimated)
Sponsor and investigators
- Lead sponsor
- Universitat Internacional de Catalunya
- Sponsor type
- University, hospital or other
- Responsible party
- Sponsor
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT07417293
- Sponsor's protocol ID
- PER-ECL-2024-07
- Status last verified
- Jan 2026
- First submitted
- 14 Jan 2026
- Last updated
- 18 Feb 2026
- Results posted
- No
- FDA-regulated drug
- No
- FDA-regulated device
- Yes
Study at a glance
From the registry record, last updated by the sponsor on 18 Feb 2026. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- Clinical- and Patient-related Outcomes of 4 mm Ultra-short Implants Compared to 8 Mm-long Implants With Bone Augmentation for the Rehabilitation of Posterior Atrophic Maxilla: a Randomized Controlled Clinical Trial.
- ClinicalTrials.gov ID
- NCT07417293
- Acronym / sponsor ID
- PER-ECL-2024-07
- Conditions
- Posterior Atrophic Maxilla
- Study type
- Interventional
- Recruitment status
- Not yet recruiting
- Enrolment
- 35 participants (estimated)
- Lead sponsor
- Universitat Internacional de CatalunyaUniversity, hospital or other
- Study start
- 20 Feb 2026 (estimated)
- Primary completion
- 1 Jul 2028 (estimated)
- Study completion
- 1 Jul 2029 (estimated)
- First posted
- 18 Feb 2026 (actual)
- Results
- Not posted in the source record
Clinical summary
The research question as the sponsor registered it. This describes what the study plans to test, not what it found.
This study aims to compare 2 different groups of patients with both a healed site in the upper posterior sector after extractions, one treated with ultra-short implants, and another with long implants with bone regeneration. The objective is to evaluate if short-implants are superior in terms of better clinical outcomes, survival rates and safety, reduced surgical time, postoperative discomfort, and complication risk compared to conventional implants and bone regeneration.
Study design
- Primary purpose
- Treatment
- Allocation
- Randomised
- Intervention model
- Parallel groups
- Masking
- None (open label)
- Number of arms
- 2
| Arm | Type | Receives |
|---|---|---|
| ultra-short implants | Experimental | Device: Ultra short implants4mm long implants |
| long implants with bone augmentation | Other | Device: Long implants with bone augmentation8mm long implants after transcrestal sinus floor elevation with bone augmentation |
Who may qualify
- Ages
- 18 years and older
- Sex
- All
- Healthy volunteers
- Not accepted
- Age groups
- Adult, Older adult
Key inclusion criteria (7 listed)
- Inform consent signed.
- Adult patients (≥18 years old).
- No pregnant women or without the desire to stay.
- Periodontal and peri-implant health in a pristine or reduced periodontium.
- Full mouth plaque score < 20% (O'Leary, 1972)
Key exclusion criteria (11 listed)
- Patients with uncontrolled systemic diseases.
- Smoker patients (≥10 cig/day).
- Patients taking medications that affect bone metabolism or immunologic disorders.
- Patients allergic to penicillin.
- Patients presenting acute or chronic maxillary sinus lesions.
Eligibility is decided by the study team after screening; this overview does not establish that a patient qualifies. Full inclusion and exclusion criteria.
Interventions
| Intervention | Type | Arms |
|---|---|---|
| Ultra short implantsPlacement of an ultra short implant of 4mm in the posterior atrophic maxilla without any bone regeneration procedure | Device | ultra-short implants |
| Long implants with bone augmentationPlacement of long implants of 8mm in the posterior atrophic maxilla alongside bone augmentation | Device | long implants with bone augmentation |
Primary outcome
Satisfaction of the surgical procedure
Time frame: The day of the intervention after the surgery is finalized
The patient is gonna make a subjective assessment of satisfaction of the surgery once it is finished. For that, we are going to use a 10 centimeter visual analog scale. The extremes of the scale are the extreme expressions of satisfaction, where the extreme left represents a 0 (not satisfied) and 10 (very satisfied). The patient won't have numbers between 0-10 so he will not be influenced by them. Wherever he marks, we will measure it and it will represent in centimeters how was his satisfaction
13 secondary outcomes
Surgical time
Time frame: at the day of the intervention, since the administration of the anesthesia until the placement of the last suture knot
Pain Intensity
Time frame: Since the day of the intervention once the surgery is finalized , until the 7th day after the surgery, each day of the following 7 days
Rescue medication
Time frame: After the surgery during the next 7 days
Intra-surgical complications
Time frame: The day of the surgery
Post-surgical complications
Time frame: 7 days after the surgery
Implant survival
Time frame: From 10 weeks after surgery to 36 months, after restoration delivery
Marginal bone level changes
Time frame: The day of the surgery, 12 months after and 36 months after
Probing pocket depth
Time frame: 12 months after surgery and 36 months after surgery
Bleeding on probing
Time frame: 12 months and 36 months after surgery
Suppuration on probing
Time frame: 12 months and 36 months after surgery
Keratinized mucosa width
Time frame: 12 months and 36 months after surgery
Soft tissue dehiscence
Time frame: 12 months and 36 months after surgery
Prosthetic complications
Time frame: 12 months and 36 months after surgery
Results and safety
This study is still under way. Results are not available in the source record yet.
Research links
- Official record on ClinicalTrials.govLast updated by the sponsor 18 Feb 2026.
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Alveolar Bone Loss
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Referral and contact
AzTrials does not enrol participants or take referrals. Contact the study team or a site listed below; they decide who can take part.
The record lists no contact. Use the official record to reach the sponsor.
Questions about this trial
What is this clinical trial studying?
A study testing Ultra short implants and Long implants with bone augmentation in people with Posterior Atrophic Maxilla, run by Universitat Internacional de Catalunya.
The full registered description is in the About this study section and the official record.
Who may be eligible to take part?
The sponsor lists 7 inclusion and 11 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.
Is this clinical trial currently recruiting?
The record says: opening soon, as of the sponsor's last update on 18 Feb 2026. Status can change between updates, so confirm with the study contact before making plans.
What are the possible benefits and risks?
They depend on the study and the treatment, and no study can promise a benefit. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.
Are results available for this study?
This study is still under way. Results are not available in the source record yet.
How can a doctor refer a patient or contact the research team?
The record lists no contact. The official record names the sponsor, who can be asked directly. AzTrials does not enrol participants or take referrals.
What does the primary outcome measure?
Satisfaction of the surgical procedure (time frame: The day of the intervention after the surgery is finalized). It is what the study was designed to measure, not a finding.
Where can I read the original study information?
Does a listing mean the treatment is approved or proven to work?
No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.
How often is this information updated?
AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 18 Feb 2026.