Evaluation of Bone Regenerated With Guided Bone Regeneration (GBR) Using Polymethylmethacrylate (PMMA) Membrane

Horizontal Ridge Deficiency Clinical Trial

Official title:

Evaluation Of Bone Regenerated After Guided Bone Regenration (GBR) Using Customized 3D Printed Polymethylmethacrylate (PMMA) Membrane in Horizontally Deficient Maxillary Aesthetic Zone

Clinical Trial Details — Status: Not yet recruiting

Administrative data

• NCT number: NCT06186232
• Other study ID #: OMFS 3310
• Status: Not yet recruiting
• Phase: N/A
• Start date: July 1, 2024
• Est. completion date: December 1, 2025

Study information

• Verified date: March 2024
• Source: Cairo University
• Contact: Rana Sherif
• Phone: 01095306060
• Email: rana-mohamed[@]dentistry.cu.edu.eg
• Is FDA regulated: No
• Study type: Interventional

Clinical Trial Summary

To evaluate the quantity and quality of bone generated, radiographically and histomorphometrically, after guided bone regeneration (GBR) using a membrane of 3D printed custom made (PMMA) and subsequent stability of delayed implant placement.

Description:

Guided bone regeneration (GBR), is the most widely used technique to facilitate bone generation. It depends on using a biocompatible membrane that acts as physical barrier preventing the connective tissue from invading the bone defect.

To achieve maximum bone regeneration, GBR membrane should have several characteristics, including:

• Biocompatibility.

• Proper stiffness for space maintenance.

• Prevent epithelial cell migration.

• Appropriate resorption time after proper bone regeneration. Membranes used in guided bone regeneration (GBR) may have some limitations as the need of second surgery for removal of the membrane (in case of non-resorbable membranes as titanium mesh or expanded polytetrafluoroethylene (e-PTFE) membranes), lake of space maintenance (as collagen membranes) in addition to their high cost.

Thus, we aim to use a commercially available material as polymethyl methacrylate (PMMA) with (GBR) to facilitate bone generation as well as subsequent implant placement.

Recent forms of (PMMA), have been certified to be biocompatible and safe for skin and mucosal contact. PMMA is characterized by having high toughness which may provide a space maintenance when using as membrane in guided bone regeneration (GBR). The PMMA prosthesis can be pre-fabricated, which results in reduction of surgical time, easy technical handling and good esthetic results.

In addition, it has a relatively low cost when it is compared to other types of membranes used in guided bone regeneration (GBR).

Recruitment information / eligibility

• Status: Not yet recruiting
• Enrollment: 6
• Est. completion date: December 1, 2025
• Est. primary completion date: June 1, 2025
• Accepts healthy volunteers: Accepts Healthy Volunteers
• Gender: All
• Age group: 18 Years to 50 Years

Eligibility

Inclusion Criteria:

• Patients with edentulous area related to horizontally deficient aesthetic zone of maxilla.

• Patients are physically healthy with no medical history of any systemic or local disease that would contraindicate ridge augmentation and/or implant surgery or complicate the healing process. (Severe liver or kidney disease, a history of head and neck radiotherapy, chemotherapy at the time of surgery, uncontrolled diabetes, active periodontal in the residual dentition, inflammatory or autoimmune disorders of the oral mucosa, poor oral hygiene, patient failure to cooperate, and any other disease condition contraindicating the oral surgery).

• Non-smokers.

• Free from temporomandibular joint disorders and abnormal oral habits such as bruxism.

• The edentulous ridges were covered with optimal thickness of keratinized mucosa with no signs of inflammation, ulceration or scar tissue.

• The occlusion shows sufficient inter-arch space for future prothesis.

Exclusion Criteria:

• General contraindications to surgery.

• Patients subjected to irradiation in the head and neck area less than 1 year before fixation.

• Untreated periodontitis.

• Poor oral hygiene.

• Uncontrolled diabetes.

• Pregnant or nursing.

• Substance abuse.

• Psychiatric problems or unrealistic expectations.

• Severe bruxism or clenching.

• Immunosuppressed or immunocompromised.

• Treated or under treatment with intravenous amino-bisphosphonates.

• Patients participating in other studies, if the present protocol could not be properly followed

Related Conditions & MeSH terms

• Horizontal Ridge Deficiency

Intervention

Procedure:
• guided bone regeneration (GBR).
guided bone regeneration (GBR) using polymethylmethacrylate (PMMA) polymer as membrane.

Locations

Country	Name	City	State
n/a

Sponsors (1)

Lead Sponsor	Collaborator
Cairo University

References & Publications (7)

AlSubaie MF, Al-Sharydah AM, Nassim HM, Alhawsawi A. Orbital Floor Blowout Fracture Reconstruction Using Moldable Polymethyl Methacrylate: A Report of Two Cases and Their Imaging Findings. Open Access Emerg Med. 2022 May 25;14:223-232. doi: 10.2147/OAEM.S359173. eCollection 2022. — View Citation

Benic GI, Hammerle CH. Horizontal bone augmentation by means of guided bone regeneration. Periodontol 2000. 2014 Oct;66(1):13-40. doi: 10.1111/prd.12039. — View Citation

Elgali I, Omar O, Dahlin C, Thomsen P. Guided bone regeneration: materials and biological mechanisms revisited. Eur J Oral Sci. 2017 Oct;125(5):315-337. doi: 10.1111/eos.12364. Epub 2017 Aug 19. — View Citation

Fernandes da Silva AL, Borba AM, Simao NR, Pedro FL, Borges AH, Miloro M. Customized polymethyl methacrylate implants for the reconstruction of craniofacial osseous defects. Case Rep Surg. 2014;2014:358569. doi: 10.1155/2014/358569. Epub 2014 Jun 30. — View Citation

Freitas de Andrade P, Meza-Mauricio J, Kern R, Faveri M. Labial Repositioning Using Print Manufactured Polymethylmethacrylate- (PMMA-) Based Cement for Gummy Smile. Case Rep Dent. 2021 Dec 21;2021:7607522. doi: 10.1155/2021/7607522. eCollection 2021. — View Citation

Khojasteh A, Kheiri L, Motamedian SR, Khoshkam V. Guided Bone Regeneration for the Reconstruction of Alveolar Bone Defects. Ann Maxillofac Surg. 2017 Jul-Dec;7(2):263-277. doi: 10.4103/ams.ams_76_17. — View Citation

Lee SW, Kim SG. Membranes for the Guided Bone Regeneration. Maxillofac Plast Reconstr Surg. 2014 Nov;36(6):239-46. doi: 10.14402/jkamprs.2014.36.6.239. Epub 2014 Nov 12. — View Citation

Outcome

Type	Measure	Description	Time frame	Safety issue
Other	post operative ridge width	using bone caliper	6 months postoperative
Other	initial implant stability	using manual ratchet	6 months post operative
Primary	amount of bone gain	radiographic using cone beam computed tomography (CBCT)	6 months postoperative
Secondary	quality of bone regenerated	bone core biopsy (histomorphometric analysis)	6 months after surgical procedure