Changes in Oral Health-related Quality of Life (OHRQoL) During Full Arch Implant Treatment

Changes in Oral Health-related Quality of Life ( OHRQoL) Full Arch Implant Treatment: A Prospective Study

Full-arch implant-supported fixed dental prostheses are a widely accepted treatment for edentulous patients, with high long-term implant survival rates. However, further research is needed on longer-term patient satisfaction and on the psychosocial impact of this treatment on patients' daily life and functioning. Assessing patient-reported outcomes - oral health-related quality of life (OHRQoL) and patient satisfaction - allows the impact of full-arch rehabilitation on patients to be evaluated.

Study Overview

• Status: Recruiting
• Conditions: Quality of Life; Tooth Loss; Edentulous Mouth; Oral Health Quality of Life (OHQoL) Was Assessed
• Intervention / Treatment: Procedure: Full Arch Implant Surgery; Device: Full arch prosthesis

Detailed Description

The aim of this prospective observational cohort study is to evaluate changes in oral health-related quality of life (OHRQoL) during the course of full-arch implant-supported rehabilitation. The study also aims to analyze whether the type of edentulous arch (maxilla or mandible) and the type of prosthetic rehabilitation (e.g. provisional vs definitive, and different prosthetic materials) influence the evolution of OHRQoL and patient satisfaction.

Eligible patients will undergo immediate full-arch implant-supported treatment using 4, 6, or 8 implants per arch, depending on the anatomical and clinical indications. Immediate loading will be achieved through screw-retained acrylic provisional prostheses. After a healing period of 3 to 6 months, a definitive screw-retained prosthesis (monolithic zirconia, veneered zirconia, or hybrid prosthesis) will be delivered.

Patient-reported outcomes will be assessed using three instruments (two validated questionnaires - OHIP-14 PT and PIDAQ-PT - and one custom-made Global Satisfaction Questionnaire):

Oral Health Impact Profile (OHIP-14 PT)

• Assesses perceived oral health-related quality of life.
• Administered at five time points:

T0: Baseline (before surgery)

T1: Day of surgery (calibration)

T2: One month after surgery and provisional prosthesis placement

T3: Prior to definitive prosthesis delivery

T4: One month after definitive prosthesis placement

Psychosocial Impact of Dental Aesthetics Questionnaire (PIDAQ-PT)

• Evaluates patients' self-perception and psychosocial impact of dental aesthetics.
• Administered at:

T0: Baseline

T2: One month after surgery and provisional prosthesis placement

T4: One month after definitive prosthesis placement

Global Satisfaction Questionnaire - Global Satisfaction Questionnaire […] - Administered at two time points:

T0: Baseline (before surgery) T4: One month after definitive prosthesis placement

Custom-made questionnaire with six items assessing patient satisfaction in the following domains:

General condition

Phonetics

Chewing comfort

Prosthesis stability

Ease of cleaning (cleanability)

Aesthetics - Each item is rated using a 4-point Likert scale:

"Very satisfied",

"Mostly satisfied",

"Less satisfied",

"Not at all satisfied".

- Administered at T4 only.

Quantitative data collected from these instruments will be used to analyze the progression of OHRQoL throughout the rehabilitation process and to explore correlations between patient profiles (sociodemographic and clinical variables) and perceived outcomes.

All questionnaires will be administered in Portuguese using secure digital platforms (Google Forms), ensuring patient confidentiality and data integrity.

• Study Type: Observational
• Enrollment (Estimated): 100

Contacts and Locations

• Study Contact: Name: Artur F Simões; Phone Number: +351962555077; Email: filipesimoesmd@gmail.com

Study Locations

• Portugal
  • Lisbon District
    • Lisbon, Lisbon District, Portugal, 1070-061
      • Recruiting
      • Instituto de Implantologia
      • Principal Investigator: Duarte Marques, Phd
      • Contact: Artur F Simões
      • Principal Investigator: Artur F Simões, Msc
      • Principal Investigator: João M Caramês, Phd

Participation Criteria

Eligibility Criteria

• Ages Eligible for Study: Adult; Older Adult
• Accepts Healthy Volunteers: No

• Sampling Method: Non-Probability Sample

Study Population

Adults with an indication for full-arch screw-retained implant-supported rehabilitation (FASISR) of the maxilla and/or mandible, in generally good systemic health and without contraindications to implant therapy.

Description

Inclusion Criteria:

Adults aged 18 years or older. Patients requiring full-arch implant-supported rehabilitation of the maxilla and/or mandible.

Patients with indication for immediate full-arch implant-supported rehabilitation using 4, 6, or 8 implants per arch, according to anatomical and clinical conditions.

Patients able to understand the study procedures and complete patient-reported outcome questionnaires Patients willing to provide written informed consent.

Exclusion Criteria:

Patients with medical contraindications for implant surgery. Patients unable to provide informed consent. Patients unable to complete the study questionnaires Patients with uncontrolled systemic conditions that may contraindicate implant therapy.

Patients unable or unwilling to attend the planned follow-up visits. Patients receiving partial-arch implant rehabilitation only.

Study Plan

How is the study designed?

Number of groups / cohorts

1

Cohorts and Interventions

Group / Cohort

Intervention / Treatment

Full-Arch Immediate Implant-Supported Rehabilitation; Participants will receive a full-arch immediate implant-supported prosthesis over 4, 6 or 8 implants, depending on individual anatomy and clinical indication. Some maxillary cases may require a sinus lift procedure. Immediate loading is performed with a screw-retained provisional prosthesis. After 3-6 months, a definitive prosthesis is delivered Maxillary or/and mandibular screw retained acrylic provisional prostheses supported by at least 4 implants; Maxillary or/and mandibular screw retained hybrid prostheses supported by at least 4 implants; Maxillary or/and mandibular screw retained zirconia monolithic prostheses supported by at least 4 implants

Procedure: Full Arch Implant Surgery; A surgical and prosthetic treatment involving the placement of 4, 6 or 8 dental implants in the edentulous maxilla or mandible, potentially preceded by sinus augmentation if needed.; Device: Full arch prosthesis; This intervention includes the full surgical and prosthetic treatment for edentulous patients undergoing full-arch implant-supported rehabilitation. The treatment consists of two main phases: Immediate implant placement with provisional prosthesis: A surgical procedure is performed for the placement of 4, 6, or 8 implants per arch (maxilla or mandible), with or without sinus augmentation depending on the case. On the same day, a screw-retained acrylic provisional prosthesis is delivered, allowing immediate functional and aesthetic rehabilitation. Definitive prosthesis delivery: After a healing period of approximately 3 to 6 months, once osseointegration and soft tissue stabilization are confirmed, a definitive screw-retained prosthesis is fabricated and delivered. Definitive prostheses may be manufactured from monolithic zirconia, veneered zirconia, or hybrid materials depending on the case. Both prosthetic phases are part of a standardized treatment protocol performed under control.

What is the study measuring?

Primary Outcome Measures

Outcome Measure	Measure Description	Time Frame
Change in Oral Health-Related Quality of Life measured by the Oral Health Impact Profile-14 Portuguese version	People's perceptions of the social impact of oral disorders on their well-being: oral health quality of life (OHIP-14). Oral health-related quality of life will be assessed using the Portuguese validated version of the Oral Health Impact Profile-14 (OHIP-14). The OHIP-14 includes 14 items, each scored from 0 to 4, generating a total score ranging from 0 to 56. Higher scores indicate poorer oral health-related quality of life and greater negative impact of oral conditions on daily life. The primary outcome will be the change in total OHIP-14 score during full-arch implant-supported rehabilitation.	[Time Frame: T0 - baseline before surgery; T1 - day of surgery; T2 - 1 month after surgery and provisional prosthesis placement; T3 - prior to definitive prosthesis delivery (approximately 3 to 6 months); T4 - 1 month after definitive prosthesis placeme

Secondary Outcome Measures

Outcome Measure	Measure Description	Time Frame
Change in psychosocial impact of dental aesthetics measured by the Psychosocial Impact of Dental Aesthetics Questionnaire - Portuguese version (PIDAQ-PT)	The psychosocial impact of dental aesthetics will be assessed using the Portuguese validated version of the PIDAQ (PIDAQ-PT). The PIDAQ-PT comprises 23 items across four subscales (dental self-confidence, social impact, psychological impact, and aesthetic concern), each scored on a 5-point Likert scale (0 to 4). Dental self-confidence items are reverse-scored so that higher total scores indicate a greater negative psychosocial impact of dental aesthetics. The outcome is the change in PIDAQ-PT total and subscale scores during full-arch implant-supported rehabilitation.	Time Frame: T0 - baseline before surgery; T2 - 1 month after surgery and provisional prosthesis placement; T4 - 1 month after definitive prosthesis placement (approximately 4 to 7 months from baseline).
Patient satisfaction measured by a Global Satisfaction Questionnaire	Patient satisfaction will be assessed using a custom-made six-item Global Satisfaction Questionnaire covering general condition, phonetics, chewing comfort, prosthesis stability, ease of cleaning (cleanability), and aesthetics. Each item is rated on a 4-point Likert scale ("Very satisfied", "Mostly satisfied", "Less satisfied", "Not at all satisfied"). The outcome is the change in patient satisfaction scores from baseline to after delivery of the definitive prosthesis.	T0 - baseline before surgery; T4 - 1 month after definitive prosthesis placement (approximately 4 to 7 months from baseline).

Collaborators and Investigators

• Sponsor: Implantology Institute
• Investigators: Principal Investigator: Artur F Simões, Msc, Implantology Institute; Study Director: Duarte Marques, Phd, Implantology Institute

Publications and helpful links

General Publications

• Slade GD. Derivation and validation of a short-form oral health impact profile. Community Dent Oral Epidemiol. 1997 Aug;25(4):284-90. doi: 10.1111/j.1600-0528.1997.tb00941.x.
• Slade GD, Spencer AJ. Development and evaluation of the Oral Health Impact Profile. Community Dent Health. 1994 Mar;11(1):3-11.
• Cella D, Riley W, Stone A, Rothrock N, Reeve B, Yount S, Amtmann D, Bode R, Buysse D, Choi S, Cook K, Devellis R, DeWalt D, Fries JF, Gershon R, Hahn EA, Lai JS, Pilkonis P, Revicki D, Rose M, Weinfurt K, Hays R; PROMIS Cooperative Group. The Patient-Reported Outcomes Measurement Information System (PROMIS) developed and tested its first wave of adult self-reported health outcome item banks: 2005-2008. J Clin Epidemiol. 2010 Nov;63(11):1179-94. doi: 10.1016/j.jclinepi.2010.04.011. Epub 2010 Aug 4.
• João Almeida Amaral, Duarte Marques, João Godinho, Filipe Barcelos, José Vaz Patto, António Mata, # 7. Validação de uma versão portuguesa do questionário Oral Health Impact Profile-14, Revista Portuguesa de Estomatologia, Medicina Dentária e Cirurgia Maxilofacial, Volume 55, Supplement 1, 2014, Page e4, ISSN 1646-2890, https://doi.org/10.1016/j.rpemd.2014.11.117. (https://www.sciencedirect.com/science/article/pii/S1646289014002039)
• Fidalgo J, Botelho J, Proenca L, Mendes JJ, Machado V, Delgado AS. Cross-Cultural Adaptation and Validation of the Portuguese Version of the Psychosocial Impact of Dental Aesthetics Questionnaire. Int J Environ Res Public Health. 2022 Aug 11;19(16):9931. doi: 10.3390/ijerph19169931.

Study record dates

Study Major Dates

• Study Start (Actual): November 1, 2025
• Primary Completion (Estimated): October 1, 2026
• Study Completion (Estimated): October 1, 2028

Study Registration Dates

• First Submitted: April 28, 2026
• First Submitted That Met QC Criteria: April 28, 2026
• First Posted (Actual): May 5, 2026

Study Record Updates

• Last Update Posted (Actual): July 21, 2026
• Last Update Submitted That Met QC Criteria: July 19, 2026
• Last Verified: July 1, 2026

More Information

Terms related to this study

• Keywords: quality of life; dental implant; oral health; OHIP-14; oral health quality of life; oral quality of life; outcome studies; Implant-supported prosthesis; PIDAQ-PT
• Additional Relevant MeSH Terms: Periodontal Diseases; Mouth Diseases; Stomatognathic Diseases; Tooth Diseases; Tooth Loss; Mouth, Edentulous
• Other Study ID Numbers: II2022-10

Plan for Individual participant data (IPD)

• Plan to Share Individual Participant Data (IPD)?: UNDECIDED

Drug and device information, study documents

• Studies a U.S. FDA-regulated drug product: No
• Studies a U.S. FDA-regulated device product: No