Effect of Slopped Shoulder Implant Neck vs Conventional Implant Neck Design on Crestal Bone Level in the Maxilla

Cairo University (CU)

Status: Unknown

Conditions: Missing Tooth

Treatments: Other: slopped shoulder implant

Study type: Interventional

Funder types: Other

Identifiers

NCT03614442

platform switching 2018

Details and patient eligibility

About

In implant dentistry, platform switching is a method used to preserve alveolar bone levels around dental implants. The concept refers to using an implant with slopped shoulder neck of narrower diameter on implants of wider diameter, rather than placing abutments of similar diameter, referred to as platform matching.The aim of the study is to compare the effect of bone-level implants versus the conventional implant on oral soft tissues.

Full description

Implant prosthesis allows normal muscle function, and the implant stimulates the bone and maintains its dimensions in a manner similar to healthy natural teeth. Crestal bone loss can result in increased bacterial accumulation resulting in secondary peri-implant inflammation and bone loss which can further result in loss of alveolar support, which in turn can lead to occlusal overload resulting in implant failure. In implant dentistry, platform switching is a method used to preserve alveolar bone levels around dental implants. The concept refers to using an implant with slopped shoulder neck of narrower diameter on implants of wider diameter, rather than placing abutments of similar diameter, referred to as platform matching. The authors developed the concept of slopped shoulder implant which results in an inward bone creeping at the coronal part of the implant to be in continuity with the alveolar bone crest.

The rational to use this type of implant allows an increase at residual crestal bone volume around the implant neck and has 3 merits:

1. Reduced mechanical stress at the implant neck area;
2. Repositioning of gingival papillae on the beveled neck implant (that is the physiologic condition);
3. proper vascular supply to the implant investing structure and bone tissue also because of reduced inter-implant space.

The aim of the study is to compare the effect of bone-level implants versus the conventional implant on oral soft tissues

Enrollment: 16 estimated patients

Sex: All

Ages: 20 to 50 years old

Volunteers: Accepts Healthy Volunteers

Inclusion criteria

• Good oral hygiene
• Systemically healthy (free from any systemic diseases).
• Adequate native bone to achieve implant primary stability
• Have had the tooth extraction at least 3 months before implant surgery.
• Did not receive soft or hard tissue augmentation before or in conjunction with implant surgery

Exclusion criteria

• Smokers
• Pregnant woman
• Had a history of alcoholism or drug abuse within the past 5 years.
• Had bruxism or clenching habits.
• Patients who refused to join the study.
• Had significant untreated periodontal disease or history of treated periodontitis.
• Had caries on teeth adjacent to the prospective implant site.
• Periapical infection.
• localized radiation therapy of the oral cavity; antitumor chemotherapy.
• poor oral hygiene

Trial design

Primary purpose: Treatment

Allocation: Randomized

Interventional model: Parallel Assignment

Masking: Quadruple Blind

---

16 participants in 2 patient groups

slopped shoulder implant

Experimental group

Description:

The osteotomy site will be prepared using appropriate drill sizes with flapless approach, The implant (conventional neck implant design )will be inserted till the platform will be flushed with the crestal bone, The primary stability will be checked using torque wrench

Treatment:

Other: slopped shoulder implant

conventional implant with flat platform

Active Comparator group

Description:

inserted implant will be bone leveled implant (crestal maxi z) implant (conventional implant with platform). The primary stability will be checked using torque wrench

Treatment:

Other: slopped shoulder implant