Peri-implantitis Surgical Regenerative Therapy Using Bovine Bone Substitute With Hyaluronic Acid

The Effect of Periimplantitis Surgical Regenerative Therapy Using Bovine Bone Substitute With Hyaluronic Acid: Randomized Controlled Clinical Trials

The study aimed to assess 6- and 12-months evaluation of clinical, microbiological, and radiography outcomes after performing peri-implantitis regenerative surgical therapy with the bovine bone substitute with or without hyaluronic acid. Materials and Methods: The study could be designed as randomized control clinical trial. Patients with a minimum of one or more early, moderate and advanced stages of the peri-implant lesion will be included in the study. After meeting inclusion criteria, during a regenerative surgical procedure, after mucoperiosteal flap elevation and implant surface decontamination, all patients will be randomly divided into two groups: test group in which bovine bone substitute with hyaluronic acid (HA) (Cerabone plus, Botiss, Germany) will be applied for the filling peri-implant bone defects while in the control group peri-implant bone defects will be filled with bovine bone substitute (Cerabone, Botiss, Germany). Bone grafts will be covered in both groups with collagen dermal matrix (Mucoderm, Botiss, Germany). Clinical, radiograph and microbiological outcomes will be followed at 6 and 12 months after the surgical procedure. ISQ implant stability will be measured before, during a surgical procedure, and 7, 15, 30 days, 3, 6 and 12 months after a surgical procedure.

Treatment procedure After the crown was removed immediately, ISQ implant stability and clinical parameters will be measured, and the sample for microbiological analyses will be taken. Subsequently, patients with a minimum of one or more diagnosed periimplantitis will undergo non-surgical periimplantitis therapy in order to reduce inflammation. The patient will be instructed on adequate oral hygiene. Antibiotics and mouths wash will not be prescribed in this phase. Surgical procedure Two weeks after the non-surgical procedure, surgical regenerative therapy will be performed by experienced operators. After local anaesthesia, a full-mucoperiosteal flap will be evaluated. ISQ implant stability will be measured before implant debridement. After granulation tissue is removed by using titanium or graphite curettes, ISQ implant stability will be measured, and implant surface decontamination will be performed, respectively. Implant surface decontamination will be performed by titanium brushes and photodynamic therapy. After implant surface decontamination, bone defect and soft tissue thickness will be measured intra-operatively using a periodontal probe. In the cases where there is additional supracrestal bone lost the implantoplasty will be performed. Thereafter, the bone defects around treated implants will be full-filled either with bovine bone substitute with or without HA (Cerabone plus or Cerabone) and Mucoderm will be inserted. Microderm (Botiss, Germany) will be fixed with 5.0 resorbable sutures. The flap will be coronally positioned and sutured with 5.0 non-resorbable sutures, respectively. ISQ implant stability will be measured after the flap was sutured. The temporary crown will be inserted, respectively. Patients will be prescribed antibiotics (Amoxicillin 500 mg, three times per day, in seven days), and 0,12% chlorhexidine solution for 14 days. Sutures will be removed 7 days after surgery. Prosthetic outcomes Every patient with periimplantitis will be scanned with an intraoral scanner in order to define premature contacts or interferent contacts in excentre movements of implants. The scan will be taken before any therapy, six, and 12 months after the surgical therapy. In the first visit, where it is possible, the crown will be removed, and the impression for the temporary crown will be taken, depending on group distribution. A temporary crown will be fixed immediately after the surgical procedure, while the new permanent crown will be made a minimum of three months after surgery. Crowns will be screw-retained. Dental implant emergent profile will be evaluated at 6 and 12 months after prosthetic rehabilitation. Gained results will be statistically analyzed using SPSS softer.

In the test group (T), bone defects will be full-filled with bovine bone substitute with HA (Cerabone plus, Botiss, Germany)

In the control group (C), bone defects will be full-filled with xenograft bovine bone substitute without HA (Cerabone, Botiss, Germany).

After local anaesthesia, a full-mucoperiosteal flap will be evaluated. After granulation tissue is removed by using titanium or graphite curettes and implant surface decontamination will be performed using photodynamic therapy. Thereafter, the peri-implant bone defects in the test group will be full-filled either with bovine bone substitute with hyaluronic acid (Cerabone plus). Collagen dermal matrix (Mucoderm) will be inserted instead of a collagen membrane. Mucoderm will be fixed with 5.0 resorbable sutures. The flap will be coronally positioned and sutured with 5.0 non-resorbable sutures, respectively.

After local anaesthesia, a full-mucoperiosteal flap will be evaluated. After granulation tissue is removed by using titanium or graphite curettes and implant surface decontamination will be performed using photodynamic therapy. Thereafter, the peri-implant bone defects in the control group will be full-filled either with bovine bone substitute (Cerabone). Collagen dermal matrix (Mucoderm) will be inserted instead of a collagen membrane. Mucoderm will be fixed with 5.0 resorbable sutures. The flap will be coronally positioned and sutured with 5.0 non-resorbable sutures, respectively.

CAL, measured in millimetres as the distance from implant shoulder to the bottom of peri-implant pocket at six points.

KTW, measured at the middle of the inserted implant in the millimetres as the distance between MM of the implant to a mucogingival junction (MGJ).

GT, measured at the mid-buccal aspect of treated implants on the long axis, 3 mm apically from perimucosal tissue margin.

Assess of the wound healing based on redness, granulation tissue presence, bleeding, suppuration, and epithelialization

>18 years of age Competent to fully understand all information regarding the research protocol of the study and to sign a written consent for participation

Inclusion Criteria: Peri-implantitis with: Presence of peri-implant pocket > 5mm, Bleeding on probing (BOP), Radiographic evidence of bone loss > 3mm, or one or two-third bone loss Implant in function for more than one year (prosthetic rehabilitation for more than six months) Good level of oral hygiene (plaque index <1) No periodontal or peri-implant treatment three months prior to the study No use antibiotics in the last three months No anti-inflammatory drugs were used in the previous two months Exclusion Criteria: Buccally implant placement, implant mobility, two-third of bone loss, patient with systemic conditions (diabetes mellitus, leukemia), patient on radiation therapy, drug and alcohol abuse, pregnant and breastfeeding, women

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