# New clinical trials in Yemen: 42 since Nov 2024

Updated November 3, 2026.

42 clinical studies with a site in Yemen were first posted on ClinicalTrials.gov from March 4, 2025 to November 3, 2026; 0 have an industry sponsor and 14 are recruiting or about to. The newest, NCT07912489, was posted on November 3, 2026: Effectiveness of Clockwise vs. Counter-Clockwise Osseodensification for Implant Site Preparation (University of Science and Technology, Yemen).

## The full list

New clinical trials with a site in Yemen: 42 rows for $5, first posted on ClinicalTrials.gov from November 12, 2024 to November 9, 2026. Columns: NCT ID, Title, Sponsor, Sponsor class, Phase, Status, Conditions, Condition groups (MeSH), Interventions, Start date, First posted, Enrollment, Enrollment type, Location countries, Central contact, Contact phone, Contact email, Last update posted, Read on, Source. The new rows each week by email, about 5 rows a month: $19 a month. Pay by card with no account. Prices exclude VAT. CSV and Excel files with the columns this page does not show (central contact, contact phone, contact email, sponsor class, condition groups (MeSH), interventions and 5 more), which open on your screen as soon as the payment clears and come by email.

Buy: https://specstream.ai/data/clinical-trials/country/yemen

SpecStream is the live web data engine for teams and agents. It reads every new study on ClinicalTrials.gov each morning, and this page is that reading. Ask for the conditions, phases or countries you follow and each new trial arrives in your sheet, CRM, Slack or agent with the sponsor, the sites and the listed contact.

- New trials: 42
- Industry sponsored: 0
- Recruiting or not yet: 14
- Latest posted: November 3, 2026

## Newest trials

The newest 42 of 42, each linked to its record. The full list holds every one with the sponsor class, interventions, start date and the central contact as the record prints it.

| First posted | NCT ID | Title | Sponsor | Phase | Status | Conditions | Enrollment | Countries | Source |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| November 3, 2026 | NCT07912489 | Effectiveness of Clockwise vs. Counter-Clockwise Osseodensification for Implant Site Preparation | University of Science and Technology, Yemen | Not applicable | Active not recruiting | Osseodensification Drilling Technique | 10 | Yemen | [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT07912489) |
| November 2, 2026 | NCT07909278 | Surgical Guide Versus Freehand Dental Implants Placement | Khadyjah Ali Ali Alrassas | Not applicable | Recruiting | Dental Implant Placement | 30 | Yemen | [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT07909278) |
| October 28, 2026 | NCT07901686 | Z-Shaped Versus Conventional Miniplates for Mandibular Fractures | Sana'a University | Not applicable | Completed | Mandibular Fractures | 20 | Yemen | [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT07901686) |
| October 7, 2026 | NCT07863427 | Clinical Fit of Conventionally Cast and 0° SLM Removable Partial Denture Frameworks | IBB University | Not applicable | Active not recruiting | Partial Edentulism Class 3, Removable Partial Denture | 2 | Yemen | [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT07863427) |
| October 2, 2026 | NCT07853664 | Topical Dexamethasone/Diclofenac Hydrogel for Postoperative Pain and Swelling in Facial Soft Tissue Injuries | Thamar University | Phase 2/3 | Recruiting | Facial Injuries, Pain, Swelling | 52 | Yemen | [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT07853664) |
| September 29, 2026 | NCT07848035 | Injectable Platelet-Rich Fibrin and Microneedling With or Without Vitamin C for Gingival Phenotype Augmentation. | University of Science and Technology, Yemen | Not applicable | Not yet recruiting | Thin Gingival Phenotype | 27 | Yemen | [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT07848035) |
| September 24, 2026 | NCT07840053 | Evaluation of Myobrace for Crossbite Correction in Mixed Dentition | Sana'a University | Not applicable | Active not recruiting | Cross Bite | 40 | Yemen | [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT07840053) |
| September 11, 2026 | NCT07814898 | Comparison Between the Effect of Triclosan Toothpaste and Chlorhexidine Mouthwash on Gingival Health in a Group of Fixed Orthodontic... | University of Science and Technology, Yemen | Phase 4 | Completed | Gingival Inflammation | 60 | Yemen | [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT07814898) |
| September 8, 2026 | NCT07807189 | HERMES: International Survey and Portable External Power Evaluation During Respiratory Support Transport | Medipol University | Observational | Completed | Patient Transport, Respiratory Failure, Noninvasive Ventilation, High-Flow Nasal Oxygen, Mechanical Ventilation... | 246 | Chile, Croatia, Egypt, India, Iran, Italy, Mexico, Oman, Qatar, Saudi Arabia... | [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT07807189) |
| August 31, 2026 | NCT07795073 | Acceleration of Tooth Movement Using PRP and Photobiomodulation With Clear Aligners | Sana'a University | Phase 1/2 | Not yet recruiting | Orthodontic Tooth Movement | 42 | Yemen | [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT07795073) |
| August 28, 2026 | NCT07792798 | Botulinum Toxin A for Jaw Dystonia . | Sana'a University | Phase 1 | Completed | Oromandibular Dystonia, Electromyography | 20 | Yemen | [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT07792798) |
| August 28, 2026 | NCT07792720 | Effect of Advanced PRF and Hyaluronic Acid on Dental Implant Healing | Samar Ali Abdu Salamah | Not applicable | Recruiting | Partial Edentulism, Dental Implant Placement | 30 | Yemen | [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT07792720) |
| August 25, 2026 | NCT07786272 | Impact of Khat Chewing on Color Stability and Patient Satisfaction of Multilayer Zirconia and Feldspathic Veneer Zirconia. | Thamar University | Not applicable | Active not recruiting | Color Stability of Dental Ceramics, Zirconia Restorations, Khat Chewing Effects, Dental Restoration Staining | 10 | Yemen | [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT07786272) |
| August 7, 2026 | NCT07752849 | Palatoplasty Techniques Using PRF and Gentamicin-Loaded PRF in Cleft Palate | Al-Thawra Modern General Hospital | Not applicable | Recruiting | Cleft Palate, Unilateral Cleft Palate, Bilateral Cleft Palate, Complete Cleft Palat, Incompelet Cleft Palate | 90 | Yemen | [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT07752849) |
| August 6, 2026 | NCT07749729 | Early Versus Late Intervention in Maxillofacial Trauma | Haifa Mohammed Sharaf-Aldeen | Observational | Completed | Maxillofacial Trauma | 50 | Yemen | [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT07749729) |
| August 4, 2026 | NCT07743879 | Comparative Efficacy of Therapeutic Ultrasound and Neurodynamic Techniques for Carpal Tunnel Syndrome | IBB University | Not applicable | Completed | Carpal Tunnel Syndrome (CTS) | 60 | Yemen | [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT07743879) |
| July 8, 2026 | NCT07690774 | AI-Assisted Versus Conventional Orthodontic Diagnosis and Treatment Planning | Ben Hafeed Dental Center | Observational | Completed | Malocclusion, Angle Class I, Malocclusion, Angle Class II, Malocclusion, Angle Class III | 120 | Yemen | [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT07690774) |
| July 7, 2026 | NCT07688109 | Primary Versus Delayed Wound Closure in Complicated Appendectomy (The HIEDI-Yemen Trial) | Sana'a University | Not applicable | Not yet recruiting | Appendicitis, Surgical Wound Infection, Postoperative Complications, Wound Healing | 200 | Yemen | [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT07688109) |
| June 22, 2026 | NCT07659665 | Oral Nifedipine Versus Placebo for Pain and Healing After Hemorrhoidectomy | Sana'a University | Phase 4 | Not yet recruiting | Hemorrhoids, Postoperative Pain, Wound Healing, Analgesia | 100 | Yemen | [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT07659665) |
| June 15, 2026 | NCT07648706 | Vitamin D3 Supplementation Regimens and Preeclampsia Risk | Sana'a University | Not applicable | Recruiting | Preeclampsia | 268 | Yemen | [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT07648706) |
| June 8, 2026 | NCT07633860 | Sellar Masses: Clinical and Imaging Features With Correlation to Histopathology and Surgical Approach | Arab Board of Neurosurgery | Observational | Completed | Sellar Mass, Pituitray Tumor | 49 | Yemen | [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT07633860) |
| June 4, 2026 | NCT07627503 | Supine vs. Prone PCNL for Large Renal Stones: A Randomized Trial in Yemen. | Sana'a University | Not applicable | Not yet recruiting | Kidney Calculi, Nephrolithiasis | 140 | Yemen | [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT07627503) |
| June 1, 2026 | NCT07616973 | Letrozole vs. Clomiphene Citrate Plus Tamoxifen for Ovulation Induction and Pregnancy Outcomes. | Sana'a University | Phase 3 | Active not recruiting | Infertility Drugs, Infertility Involuntary | 240 | Yemen | [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT07616973) |
| February 27, 2026 | NCT07436533 | Osseodensification for Narrow Alveolar Ridge Expansion | University of Science and Technology, Yemen | Not applicable | Active not recruiting | Osseodensification, Bone Expansion, Alveolar Bone Loss, Jaw, Edentulous, Partially | 35 | Yemen | [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT07436533) |
| February 20, 2026 | NCT07424742 | Graftless TSFE Via Self-tapping Implants | Sana'a University | Not applicable | Recruiting | Edentulous Posterior Maxilla, Maxillary Sinus Pneumatization, Alveolar Bone Atrophy | 20 | Yemen | [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT07424742) |
| February 20, 2026 | NCT07424716 | Bone Regeneration Using PRF After Cyst Enucleation | Sana'a University | Not applicable | Recruiting | Odontogenic Cyst, Jaw Cysts, Osseous Defect After Cyst Enucleation | 20 | Yemen | [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT07424716) |
| February 13, 2026 | NCT07408895 | Effect of Injectable Platelet Rich Derivatives on Orthodontic Canine Retraction | Sana'a University | Not applicable | Completed | Accelerate Tooth Movement | 21 | Yemen | [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT07408895) |
| February 10, 2026 | NCT07399197 | 3-D Evaluation of Alveolar Bone Changes and Root Resorption After Traction of Buccally Displaced Maxillary Canines | Sana'a University | Not applicable | Recruiting | Malocclusion; Displaced Teeth | 40 | Yemen | [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT07399197) |
| January 5, 2026 | NCT07317596 | Comparing Methylprednisolone And Hyaluronic Acid To Reduce Wisdom Tooth Surgery Complications | Sana'a University | Phase 3 | Enrolling by invitation | Wisdom Tooth Removal, Post Operative Complications, Hyaluronic Acid, Methylprednisolone | 40 | Yemen | [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT07317596) |
| December 29, 2025 | NCT07307209 | "Sliding Jigs vs Retraction Hooks for Maxillary Dentition Distalization Using IZC Miniscrews" | Sana'a University | Not applicable | Recruiting | Skeletal Class II Malocclusion | 40 | Yemen | [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT07307209) |
| December 26, 2025 | NCT07304882 | A Comparison of Recovery After Impacted Wisdom Tooth Removal | University of Science and Technology, Yemen | Phase 3 | Completed | Impacted Mandibular Third Molar Extraction, Post Operative Complications | 24 | Yemen | [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT07304882) |
| December 23, 2025 | NCT07300371 | Intra-oral Evaluation of Force Decay of Pigmented and Transparent Elastomeric Power Chains: | Sana'a University | Not applicable | Completed | Orthodontic Treatment, Malocclusion | 96 | Yemen | [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT07300371) |
| December 5, 2025 | NCT07267637 | Autogenous Tooth Bone Graft for Alveolar Socket Preservation | Haifaa Mohammed Al-hussini | Not applicable | Active not recruiting | Alveolar Bone Grafting, Bone Regeneration Following Wisdom Teeth Extraction, Tooth Extraction Site Healing | 20 | Yemen | [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT07267637) |
| December 5, 2025 | NCT07266935 | Posterior Pericardiotomy for Prevention of POAF After Cardiac Surgery: RCT in Yemen | Taiz University - Faculty of Medicine | Not applicable | Completed | Postoperative Atrial Fibrillation, Cardiac Tamponade | 210 | Yemen | [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT07266935) |
| September 9, 2025 | NCT07162389 | Comparative (Short vs. Standard) Length Implants in Early Stability Patterns. | University of Science and Technology, Yemen | Not applicable | Active not recruiting | Alveolar Bone Atrophy | 10 | Yemen | [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT07162389) |
| August 26, 2025 | NCT07141836 | Effectiveness of Elastic Chains Versus Elastics in Maxillary Canine Retraction | Sana'a University | Not applicable | Completed | Elastic Chains, Elastics | 33 | Yemen | [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT07141836) |
| August 8, 2025 | NCT07111702 | Prophylactic Antibiotics in Groin Hernioplasty | Sana'a University | Not applicable | Completed | Surgical Site Infection, Groin Hernia, Hernioplasty | 100 | Yemen | [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT07111702) |
| August 5, 2025 | NCT07104994 | Inferior Alveolar Nerve Translocation With Dental Implant Placement in Severely Resorbed Mandibles | University of Science and Technology, Yemen | Not applicable | Completed | Sever Mandibular Bone Resorption, Sensory Defect, Implant Failure | 9 | Yemen | [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT07104994) |
| August 3, 2025 | NCT07101315 | Early Versus Delayed Laparoscopic Cholecystectomy for Acute Cholecystitis | Sana'a University | Not applicable | Completed | Acute Cholecystitis | 81 | Yemen | [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT07101315) |
| June 10, 2025 | NCT07013162 | Efficacy of Laser Therapy for Periodontitis | University of Science and Technology, Yemen | Not applicable | Active not recruiting | Periodontal Disease | 21 | Yemen | [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT07013162) |
| March 20, 2025 | NCT06886100 | Melanin Recurrence in Scalpel and LASER Gingival Depigmentation in Thin and Thick Phenotypes. | Thamar University | Not applicable | Completed | Melanin Hyperpigmentation | 30 | Yemen | [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT06886100) |
| March 4, 2025 | NCT06856811 | Condylar Position Changes in Anterior Disc Displacement with Reduction | Sana'a University | Not applicable | Completed | TMJ Disorder | 14 | Yemen | [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT06856811) |

## Sponsors posting most

| Sponsor | New trials | Latest |
| --- | --- | --- |
| Sana'a University | 20 | October 28, 2026 |
| University of Science and Technology, Yemen | 8 | November 3, 2026 |
| Thamar University | 3 | October 2, 2026 |
| IBB University | 2 | October 7, 2026 |
| Khadyjah Ali Ali Alrassas | 1 | November 2, 2026 |
| Medipol University | 1 | September 8, 2026 |
| Samar Ali Abdu Salamah | 1 | August 28, 2026 |
| Al-Thawra Modern General Hospital | 1 | August 7, 2026 |
| Haifa Mohammed Sharaf-Aldeen | 1 | August 6, 2026 |
| Ben Hafeed Dental Center | 1 | July 8, 2026 |
| Arab Board of Neurosurgery | 1 | June 8, 2026 |
| Haifaa Mohammed Al-hussini | 1 | December 5, 2025 |
| Taiz University - Faculty of Medicine | 1 | December 5, 2025 |

## Conditions

| Condition group | New trials | Latest |
| --- | --- | --- |
| [Pain](https://specstream.ai/data/clinical-trials/condition/pain) | 3 | October 2, 2026 |
| Malocclusion | 3 | September 24, 2026 |
| Alveolar Bone Loss | 3 | February 27, 2026 |
| [Surgical Wound Infection](https://specstream.ai/data/clinical-trials/condition/surgical-wound-infection) | 2 | July 7, 2026 |
| Mandibular Fractures | 1 | October 28, 2026 |
| Facial Injuries | 1 | October 2, 2026 |
| [Gingivitis](https://specstream.ai/data/clinical-trials/condition/gingivitis) | 1 | September 11, 2026 |
| [Respiratory Insufficiency](https://specstream.ai/data/clinical-trials/condition/respiratory-insufficiency) | 1 | September 8, 2026 |
| [Patient Satisfaction](https://specstream.ai/data/clinical-trials/condition/patient-satisfaction) | 1 | August 25, 2026 |
| Cleft Palate | 1 | August 7, 2026 |
| [Carpal Tunnel Syndrome](https://specstream.ai/data/clinical-trials/condition/carpal-tunnel-syndrome) | 1 | August 4, 2026 |
| Malocclusion, Angle Class I | 1 | July 8, 2026 |
| Malocclusion, Angle Class II | 1 | July 8, 2026 |
| Malocclusion, Angle Class III | 1 | July 8, 2026 |
| Appendicitis | 1 | July 7, 2026 |
| [Postoperative Complications](https://specstream.ai/data/clinical-trials/condition/postoperative-complications) | 1 | July 7, 2026 |
| Hemorrhoids | 1 | June 22, 2026 |
| [Pain, Postoperative](https://specstream.ai/data/clinical-trials/condition/pain-postoperative) | 1 | June 22, 2026 |
| [Agnosia](https://specstream.ai/data/clinical-trials/condition/agnosia) | 1 | June 22, 2026 |
| [Pre-Eclampsia](https://specstream.ai/data/clinical-trials/condition/pre-eclampsia) | 1 | June 15, 2026 |
| [Kidney Calculi](https://specstream.ai/data/clinical-trials/condition/kidney-calculi) | 1 | June 4, 2026 |
| Nephrolithiasis | 1 | June 4, 2026 |
| Anovulation | 1 | June 1, 2026 |
| [Infertility](https://specstream.ai/data/clinical-trials/condition/infertility) | 1 | June 1, 2026 |
| [Polycystic Ovary Syndrome](https://specstream.ai/data/clinical-trials/condition/polycystic-ovary-syndrome) | 1 | June 1, 2026 |

## By phase

| Phase | New trials | Latest |
| --- | --- | --- |
| [Not applicable](https://specstream.ai/data/clinical-trials/phase/not-applicable) | 30 | November 3, 2026 |
| [Observational](https://specstream.ai/data/clinical-trials/phase/observational) | 4 | September 8, 2026 |
| [Phase 3](https://specstream.ai/data/clinical-trials/phase/phase-3) | 3 | June 1, 2026 |
| [Phase 4](https://specstream.ai/data/clinical-trials/phase/phase-4) | 2 | September 11, 2026 |
| [Phase 2/3](https://specstream.ai/data/clinical-trials/phase/phase-2-3) | 1 | October 2, 2026 |
| [Phase 1/2](https://specstream.ai/data/clinical-trials/phase/phase-1-2) | 1 | August 31, 2026 |
| [Phase 1](https://specstream.ai/data/clinical-trials/phase/phase-1) | 1 | August 28, 2026 |

## Where the register publishes

- [ClinicalTrials.gov](https://clinicaltrials.gov/)
- [ClinicalTrials.gov API](https://clinicaltrials.gov/data-api/api)

Source: [ClinicalTrials.gov API v2 (U.S. National Library of Medicine)](https://clinicaltrials.gov/data-api/api). U.S. government data; ClinicalTrials.gov terms of use. Studies are as their sponsors registered them on ClinicalTrials.gov, read through its API. Condition groups are the MeSH terms ClinicalTrials.gov assigns to each study's conditions; a study with several is in several groups. Sponsor class is the register's class of the lead sponsor. The central contact is in the full list only as the record prints it.

Free to reuse with credit to SpecStream under [CC BY 4.0](https://creativecommons.org/licenses/by/4.0/).