Clinical study evaluating the survival and success rates of two dental implants with a narrow diameter made of a titanium-zirconium alloy supporting a dental bridge

Prospective clinical study of Straumann NNC dental implants for the treatment of partially edentulous patients

Status

Active, not recruiting

Phases

Unknown

Study type

Observational

Source

ISRCTN

Registry ID

ISRCTN23651018

Enrollment

Registered

2017-11-28

Start date

2012-09-15

Completion date

Unknown

Last updated

2023-09-11

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Partially edentulous patients, missing 3 or four teeth in both jaws Oral Health

Interventions

Thirty patients with partial edentulism (missing 3 or 4 teeth from second premolar to second premolar of both jaws) will be recruited for the study at the School of Dentistry’s Clinic, Universitat Int

Eligibility

Sex/Gender

All

Inclusion criteria

Inclusion criteria: 1. Patients =18 years of age 2. Patients in need of multiple teeth restoration in the maxilla or mandible, of incisors, canines and bicuspids 3. Patients with narrow ridges where conventional implants with a diameter of 4.1 mm cannot be used (< 6 mm) 4. Patients with a full mouth plaque according to O’Leary = 25% at time of surgery

Exclusion criteria

Exclusion criteria: 1. Patients with any conditions or circumstances which would interfere with the requirements for oral surgery 2. Patients allergic to any implant metallic component 3. Patients needing major bone regeneration techniques 4. Patients where the ridge allows the restoration with a conventional implant diameter of 4.1 mm

Design outcomes

Primary

Measure	Time frame
Success and survival rate of Straumann NNC implants 12 months after final restoration: 1. The success rate will be assessed according to the criteria of Buser (Buser et al., 1991): 1.1. No detectable clinical mobility (hand testing) 1.2. No radiolucency surrounding the total surface of the implant 1.3. No persistent pain refractory to medical therapy 1.4. No recurrent peri-implant infection 2. A surviving implant is an implant that is in place at the time of evaluation	—

Measure

Time frame

Success and survival rate of Straumann NNC implants 12 months after final restoration: 1. The success rate will be assessed according to the criteria of Buser (Buser et al., 1991): 1.1. No detectable clinical mobility (hand testing) 1.2. No radiolucency surrounding the total surface of the implant 1.3. No persistent pain refractory to medical therapy 1.4. No recurrent peri-implant infection 2. A surviving implant is an implant that is in place at the time of evaluation

—

Secondary

Measure	Time frame
Measured after 1 year, 3 years and 5 years: 1. Radiological measurements of the crestal bone level (mesial and distal), with bite registration and paralleling technique 2. Patient satisfaction and dentist satisfaction, measured using VAS 3. Periodontal evaluation: clinical attachment level, bleeding on probing, plaque index, pocket probing depth 4. Vestibular bone stability, measured using a small field CBCT 4. Survival, success and complications of the prostho treatment	—

Measure

Time frame

Measured after 1 year, 3 years and 5 years: 1. Radiological measurements of the crestal bone level (mesial and distal), with bite registration and paralleling technique 2. Patient satisfaction and dentist satisfaction, measured using VAS 3. Periodontal evaluation: clinical attachment level, bleeding on probing, plaque index, pocket probing depth 4. Vestibular bone stability, measured using a small field CBCT 4. Survival, success and complications of the prostho treatment

—

Countries

Spain

Outcome results

None listed

Source: ISRCTN (via WHO ICTRP) · Data processed: Feb 4, 2026