Altered Passive Eruption of TeethNCT05969132
Digital Versus Conventional Guided Gingivectomy
A study testing Fully digital guided gingivectomy procedure and Convectional guided gingivectomy procedure in people with Altered Passive Eruption of Teeth, run by Ain Shams University at 1 site in Egypt.
Trial summary
The goal of this randomized controlled clinical study is to compare Fully digital to conventional guided Gingivectomy procedure in management of excessive gingival display caused by altered passive eruption type 1A. Read more about this study
- Who is it for?
- Ages 20 to 40 yearsHealthy volunteers can take part
- Conditions the study is for
- Altered Passive Eruption of Teeth
- What is being tested?
- Fully digital guided gingivectomy procedure and Convectional guided gingivectomy procedure
- Type of treatment
- Pill or oral medicine, Surgery or procedure
- Could I receive a placebo?
- No, everyone receives an active treatment
- How many people
- 24 participants
- Where
- 1 siteEgypt
- Study dates
- 31 Dec 2024to 1 May 2026
- Phase
- Interventional
- Are there results?
- None posted in the registry
Key requirements
Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.
- Ages 20 to 40 years
- All sexes
- Healthy volunteers accepted
- Adult
Who may be able to join
- Patients complaining of Excessive gingival display (3mm or more gingival display at full smiling)
- Patients classified as Altered Passive Eruption Type 1A
Who cannot join
- Patients need restorative or orthodontic correction.
- Pregnant and lactating females.
- Heavy smoker ≥ 10 cigarettes/day.
- Poor oral hygiene.
- Patients with systemic diseases which could influence the outcome of the therapy e.g.
- (Diabetic patients).
- Heavy smoker ≥ 10 cigarettes/day.
- Vulnerable groups of patients e.g. (prisoners, handicapped patients and decisionally impaired individuals)
Trial locations and contacts
1 site in 1 country.
About this study
Official title: Fully Digital Guided Gingivectomy in Management of Gummy Smile: Evaluation of Accuracy and Patient Satisfaction
The goal of this randomized controlled clinical study is to compare Fully digital to conventional guided Gingivectomy procedure in management of excessive gingival display caused by altered passive eruption type 1A.
The main question it aims to answer is:
Does the fully digital guided gingivectomy approach able to introduce a more precise, accuracy and reliability technique with more patient satisfaction compared to the conventional guided method?
Read the detailed description
Nowadays, the concept of smile and dental esthetics is no longer limited to the teeth. The essentials of a smile involve the relationship between the three primary components: the teeth, lip framework, and the gingival scaffold.
The term "pink aesthetics" refers to the aesthetics of gingival tissues, which play a significant influence in smile aesthetics.
Excessive gingival display while smiling, also usually known as a "gummy smile," is a common esthetic concern among dental patients and, being largely viewed as unesthetic, leads many patients to seek some form of treatment to address the issue.
Gummy smile (Excessive gingival display) is recognized by the American Academy of Periodontology (AAP) as a deformity and mucogingival condition that affects the area around the teeth.
This condition could be caused by many etiological factors: short lip, hypermobile/hyperactive lip, short clinical crowns, dentoalveolar extrusion, altered passive eruption (APE), gingival hyperplasia, and vertical maxillary excess.
Altered passive eruption defined as "the gingival margin in the adult is located incisal to the cervical convexity of the crown and removed from the cementoenamel junction of the tooth".
Altered passive eruption classified into two main classes according to the relationship of the gingiva to the anatomic crown and furthermore subdivided those classes according to the position of the osseous crest. The two types are subdivided into four categories: 1A, 1B and 2A, 2B.
The diagnosis of APE is made on a collective clinical and radiographic examination, it begins with analyzing the repose during a natural smile followed by analyzing the gingival display, the alveolar crest level, as well as the lip line of the patient.
Determination can be made whether a gingivectomy alone will suffice or a gingival flap will be needed with or without ostectomy will depend of the diagnosis of APE and classification of each case.
The selection of one technique over another depends on several patient related factors such as esthetics, clinical crown to root ratio, root proximity, root morphology, furcation location, individual tooth position, collective tooth position and ability to restore the teeth.
The gingivectomy approach alone is used when 3 mm gingival tissue or greater exists from bone to gingival crest, and an adequate attached gingiva will remain after surgery (APE type IA).
A diagnostic wax-up then an intraoral fabricated mock-up representing the desired outcome can assist in the selection of proper planning of the need for periodontal surgical approach.
Diagnostic mock-up fabricated using a temporary bis-acrylic resin with a putty guide directly from the wax-up can be used to provide the patient and clinician with an evaluation of the future outcome and can be used as a surgical guide for gingivectomy procedures.
The major limitations with conventional guided gingivectomy procedure would be the time consumed during making and modifying conventional wax-ups as well as the unpredictable estimate of where the gingival margin should be.
Utilization of digital workflows allowed the enhancement of communication and might improve the predictability of contemporary gingivectomy approach.
The introduction of computer-aided design and computer-aided manufacturing (CAD-CAM) techniques has helped surgeons perform more precise and predictable surgery and contributed to improved esthetics.
By combining the use of Digital Smile Design and CAD/CAM technology with (3D) printing, a surgical guide for Gingivectomy procedure could be produced.
The aim of the present study will be to evaluate accuracy and reliability of digital guided method of gingivectomy procedure using CAD CAM technology versus conventional method using resin Mock-up as gingivectomy surgical guide.
Research Question "Does the fully digital guided gingivectomy approach able to introduce a more precise, accuracy and reliability technique with more patient satisfaction compared to the conventional guided method?"
- Conditions
- Altered Passive Eruption of Teeth
- Being tested
- Fully digital guided gingivectomy procedure, Convectional guided gingivectomy procedure
- Keywords
- gummy smile, excessive gingival display, Altered Passive Eruption, gingivectomy, fully digital guided
What participants receive
What participants receive. In a randomised study each person is assigned to one group by chance.
Fully digital guided gingivectomy procedureProcedure or surgery
- Full history with clinical and radiographic examination (CBCT) to aid in patient's selection.
- Supra- and sub-gingival debridement.
- Oral hygiene instructions (OHI)
- Presurgical intraoral scanning using an intraoral scanner (IOS)
- Fabrication of the Gingivectomy guide:
- Convert (DICOM) file to STL file then merged to STL file corresponding oral soft tissues 3D data obtained by IOS using software of surgical planning.
- Digital waxing up with new desired positions of gingival margins and zenith points performed.
- Designing Gingivectomy guide then exported to a 3D printer and mill a transparent resin gingivectomy guide.
- Surgical Procedure: anesthetized the patient using local anesthesia, Surgical incision using 15c blade following CEJ anatomy will be made at each tooth using the Gingivectomy guide as reference to new gingival level and being careful to preserve the gingival papillae without involving the palatal surfaces.
- Postoperative care
Convectional guided gingivectomy procedureProcedure or surgery
- Full history with clinical and radiographic examination (CBCT) to aid in patient's selection.
- Supra- and sub-gingival debridement with OHI
- Gingivectomy guide fabrication:
- Impressions and casts obtained.
- Waxing-up included new positions of gingival margins and zenith points.
- Silicone index with condensation silicone impression materials made with pressure on the cast to reproduce the details of the wax, then filled after setting with resin material and placed in the patient's mouth.
- Resin mock-up trimmed with blade to define the correct new gingival level.
- After the patient accept the mock-up design will used as Gingivectomy guide.
- Surgical Procedure: anesthetized the patient using local anesthesia, Surgical incision using 15c blade following CEJ anatomy will be made at each tooth using the Gingivectomy guide as reference to new gingival level and being careful to preserve the gingival papillae without involving the palatal surfaces.
- Postoperative care
| Study group | Role | What they receive |
|---|---|---|
| Digital workflow-based Protocol | Experimental | Fully digital guided gingivectomy procedure Receives: Procedure: Fully digital guided gingivectomy procedure |
| Mock-up workflow-based Protocol | Active comparator | Convectional guided gingivectomy procedure Receives: Procedure: Convectional guided gingivectomy procedure |
What is being measured
The primary outcome is the main question the study is designed to answer.
Accuracy of both guides
Intraoral digital scanning for obtaining gingival contour will be made immediately postsurgical, 4 weeks and 2 months after surgery and exported in STL files format.
Diagnostic waxing-up on poured cast (for group 2) will be digitalized with a model scanner and exported in STL file format.
Accuracy will be evaluated by:
- Superimposing postoperative intraoral digital scanning STL files with virtually designed diagnostic waxing STL file (for group 1) and obtain matching differences in height of gingival margin in relation to Muco-gingival junction.
- Superimposing postoperative intraoral digital scanning STL files with digitized waxing-up STL file (for group 2) and obtain matching differences in height of gingival margin in relation to Muco-gingival junction.
Measured: Immediately postsurgical, 4 weeks and 2 months after surgery
Secondary outcomes (1)
Patient Satisfaction
A 5-item custom made questionnaire will give to the patients to be answered for assessing their satisfaction with the whole procedure and the results of the procedure performed.
- Post-operative pain (POP): It will be evaluated indirectly based on the mean consumption (in mg) of analgesics (ibuprofen)* after the surgical procedures (Wessel and Tatakis, 2008).
- Post-operative results
- Post-operative swelling: It will be reported by the patients through the first week (7 days) postsurgically based on the Verbal Rating Scale (VRS) values (absent, slight, moderate and severe) (García et al., 2008).
- Surgery time
- Procedure as a whole
Measured: 2 months
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted1 Aug 2023
- Study start31 Dec 2024
- Primary completion28 Dec 2025
- Study completion1 May 2026
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Publications (28)Papers the sponsor has linked to this study.
- Other trials for Altered Passive Eruption of TeethStudies of the same condition, open and under way.
- What the trial phases meanHow a treatment moves from first tests in people to approval.
More details
For doctors and researchers: how the study is designed, who runs it, and its registry IDs.
Study design
- Study type
- Interventional
- Phase
- Phase N/A
- Primary purpose
- Treatment
- Allocation
- Randomised
- Intervention model
- Parallel groups
- Masking
- Single blind
- Who is masked
- Outcomes assessor
- Enrolment
- 24 participants (actual)
Sponsor and investigators
- Lead sponsor
- Ain Shams University
- Sponsor type
- University, hospital or other
- Responsible party
- Principal investigator, Eslam Hashem, Ain Shams University
- Investigators
- Ahmed E. Amr, Ass. Prof., Study director, Faculty of dentistry Ain Shams University
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT05969132
- Sponsor's protocol ID
- FDASU-RecIM122209
- Status last verified
- May 2026
- First submitted
- 22 Jul 2023
- Last updated
- 3 Jun 2026
- Results posted
- No
- FDA-regulated drug
- No
- FDA-regulated device
- No
Publications
Ahmed WM, Hans A, Verhaeghe TV, Nguyen C. Managing Excessive Gingival Display Using a Digital Workflow. J Prosthodont. 2020 Jun;29(5):443-447. doi: 10.1111/jopr.13181. Epub 2020 May 6.
PubMed 32321195Arias DM, Trushkowsky RD, Brea LM, David SB. Treatment of the Patient with Gummy Smile in Conjunction with Digital Smile Approach. Dent Clin North Am. 2015 Jul;59(3):703-16. doi: 10.1016/j.cden.2015.03.007.
PubMed 26140976Armitage GC. Development of a classification system for periodontal diseases and conditions. Ann Periodontol. 1999 Dec;4(1):1-6. doi: 10.1902/annals.1999.4.1.1.
PubMed 10863370Bensimon GC. Surgical crown-lengthening procedure to enhance esthetics. Int J Periodontics Restorative Dent. 1999 Aug;19(4):332-41.
PubMed 10709500Coslet JG, Vanarsdall R, Weisgold A. Diagnosis and classification of delayed passive eruption of the dentogingival junction in the adult. Alpha Omegan. 1977 Dec;70(3):24-8. No abstract available.
PubMed 276255Davarpanah M, Jansen CE, Vidjak FM, Etienne D, Kebir M, Martinez H. Restorative and periodontal considerations of short clinical crowns. Int J Periodontics Restorative Dent. 1998 Oct;18(5):424-33.
PubMed 10093519De Rouck T, Eghbali R, Collys K, De Bruyn H, Cosyn J. The gingival biotype revisited: transparency of the periodontal probe through the gingival margin as a method to discriminate thin from thick gingiva. J Clin Periodontol. 2009 May;36(5):428-33. doi: 10.1111/j.1600-051X.2009.01398.x.
PubMed 19419444Dolt AH 3rd, Robbins JW. Altered passive eruption: an etiology of short clinical crowns. Quintessence Int. 1997 Jun;28(6):363-72.
PubMed 9477899Dym H, Pierre R 2nd. Diagnosis and Treatment Approaches to a "Gummy Smile". Dent Clin North Am. 2020 Apr;64(2):341-349. doi: 10.1016/j.cden.2019.12.003. Epub 2020 Jan 24.
PubMed 32111273Faul F, Erdfelder E, Lang AG, Buchner A. G*Power 3: a flexible statistical power analysis program for the social, behavioral, and biomedical sciences. Behav Res Methods. 2007 May;39(2):175-91. doi: 10.3758/bf03193146.
PubMed 17695343Garber DA, Salama MA. The aesthetic smile: diagnosis and treatment. Periodontol 2000. 1996 Jun;11:18-28. doi: 10.1111/j.1600-0757.1996.tb00179.x. No abstract available.
PubMed 9567953Garcia B, Larrazabal C, Penarrocha M, Penarrocha M. Pain and swelling in periapical surgery. A literature update. Med Oral Patol Oral Cir Bucal. 2008 Nov 1;13(11):E726-9.
PubMed 18978715Geevarghese A, Baskaradoss JK, Alsalem M, Aldahash A, Alfayez W, Alduhaimi T, Alehaideb A, Alsammahi O. Perception of general dentists and laypersons towards altered smile aesthetics. J Orthod Sci. 2019 Aug 8;8:14. doi: 10.4103/jos.JOS_103_18. eCollection 2019.
PubMed 31497573Goldman, H.M. & Cohen, D.W. (1968). Periodontal Therapy. 4ed. St. Louis: C.V. Mosby Company.
Gurrea J, Bruguera A. Wax-up and mock-up. A guide for anterior periodontal and restorative treatments. Int J Esthet Dent. 2014 Summer;9(2):146-62.
PubMed 24765624
Study at a glance
From the registry record, last updated by the sponsor on 3 Jun 2026. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- Fully Digital Guided Gingivectomy in Management of Gummy Smile: Evaluation of Accuracy and Patient Satisfaction
- ClinicalTrials.gov ID
- NCT05969132
- Acronym / sponsor ID
- FDASU-RecIM122209
- Conditions
- Altered Passive Eruption of Teeth
- Keywords
- gummy smile, excessive gingival display, Altered Passive Eruption, gingivectomy, fully digital guided
- Study type
- Interventional
- Recruitment status
- Completed
- Enrolment
- 24 participants (actual)
- Lead sponsor
- Ain Shams UniversityUniversity, hospital or other
- Study start
- 31 Dec 2024 (actual)
- Primary completion
- 28 Dec 2025 (actual)
- Study completion
- 1 May 2026 (actual)
- First posted
- 1 Aug 2023 (actual)
- Results
- Not posted in the source record
Clinical summary
The research question as the sponsor registered it. This describes what the study plans to test, not what it found.
The goal of this randomized controlled clinical study is to compare Fully digital to conventional guided Gingivectomy procedure in management of excessive gingival display caused by altered passive eruption type 1A.
The main question it aims to answer is:
Does the fully digital guided gingivectomy approach able to introduce a more precise, accuracy and reliability technique with more patient satisfaction compared to the conventional guided method?
Detailed description
Nowadays, the concept of smile and dental esthetics is no longer limited to the teeth. The essentials of a smile involve the relationship between the three primary components: the teeth, lip framework, and the gingival scaffold.
The term "pink aesthetics" refers to the aesthetics of gingival tissues, which play a significant influence in smile aesthetics.
Excessive gingival display while smiling, also usually known as a "gummy smile," is a common esthetic concern among dental patients and, being largely viewed as unesthetic, leads many patients to seek some form of treatment to address the issue.
Gummy smile (Excessive gingival display) is recognized by the American Academy of Periodontology (AAP) as a deformity and mucogingival condition that affects the area around the teeth.
This condition could be caused by many etiological factors: short lip, hypermobile/hyperactive lip, short clinical crowns, dentoalveolar extrusion, altered passive eruption (APE), gingival hyperplasia, and vertical maxillary excess.
Altered passive eruption defined as "the gingival margin in the adult is located incisal to the cervical convexity of the crown and removed from the cementoenamel junction of the tooth".
Altered passive eruption classified into two main classes according to the relationship of the gingiva to the anatomic crown and furthermore subdivided those classes according to the position of the osseous crest. The two types are subdivided into four categories: 1A, 1B and 2A, 2B.
The diagnosis of APE is made on a collective clinical and radiographic examination, it begins with analyzing the repose during a natural smile followed by analyzing the gingival display, the alveolar crest level, as well as the lip line of the patient.
Determination can be made whether a gingivectomy alone will suffice or a gingival flap will be needed with or without ostectomy will depend of the diagnosis of APE and classification of each case.
The selection of one technique over another depends on several patient related factors such as esthetics, clinical crown to root ratio, root proximity, root morphology, furcation location, individual tooth position, collective tooth position and ability to restore the teeth.
The gingivectomy approach alone is used when 3 mm gingival tissue or greater exists from bone to gingival crest, and an adequate attached gingiva will remain after surgery (APE type IA).
A diagnostic wax-up then an intraoral fabricated mock-up representing the desired outcome can assist in the selection of proper planning of the need for periodontal surgical approach.
Diagnostic mock-up fabricated using a temporary bis-acrylic resin with a putty guide directly from the wax-up can be used to provide the patient and clinician with an evaluation of the future outcome and can be used as a surgical guide for gingivectomy procedures.
The major limitations with conventional guided gingivectomy procedure would be the time consumed during making and modifying conventional wax-ups as well as the unpredictable estimate of where the gingival margin should be.
Utilization of digital workflows allowed the enhancement of communication and might improve the predictability of contemporary gingivectomy approach.
The introduction of computer-aided design and computer-aided manufacturing (CAD-CAM) techniques has helped surgeons perform more precise and predictable surgery and contributed to improved esthetics.
By combining the use of Digital Smile Design and CAD/CAM technology with (3D) printing, a surgical guide for Gingivectomy procedure could be produced.
The aim of the present study will be to evaluate accuracy and reliability of digital guided method of gingivectomy procedure using CAD CAM technology versus conventional method using resin Mock-up as gingivectomy surgical guide.
Research Question "Does the fully digital guided gingivectomy approach able to introduce a more precise, accuracy and reliability technique with more patient satisfaction compared to the conventional guided method?"
Study design
- Primary purpose
- Treatment
- Allocation
- Randomised
- Intervention model
- Parallel groups
- Masking
- Single blind (outcomes assessor)
- Number of arms
- 2
| Arm | Type | Receives |
|---|---|---|
| Digital workflow-based Protocol | Experimental | Procedure: Fully digital guided gingivectomy procedureFully digital guided gingivectomy procedure |
| Mock-up workflow-based Protocol | Active comparator | Procedure: Convectional guided gingivectomy procedureConvectional guided gingivectomy procedure |
Who may qualify
- Ages
- 20 to 40 years
- Sex
- All
- Healthy volunteers
- Accepted
- Age groups
- Adult
Key inclusion criteria (2 listed)
- Patients complaining of Excessive gingival display (3mm or more gingival display at full smiling)
- Patients classified as Altered Passive Eruption Type 1A
Key exclusion criteria (8 listed)
- Patients need restorative or orthodontic correction.
- Pregnant and lactating females.
- Heavy smoker ≥ 10 cigarettes/day.
- Poor oral hygiene.
- Patients with systemic diseases which could influence the outcome of the therapy e.g.
Eligibility is decided by the study team after screening; this overview does not establish that a patient qualifies. Full inclusion and exclusion criteria.
Interventions
| Intervention | Type | Arms |
|---|---|---|
| Fully digital guided gingivectomy procedure1. Full history with clinical and radiographic examination (CBCT) to aid in patient's selection. 2. Supra- and sub-gingival debridement. 3. Oral hygiene instructions (OHI) 4. Presurgical intraoral scanning using an intraoral scanner (IOS) 5. Fabrication of the Gingivectomy guide: * Convert (DICOM) file to STL file then merged to STL file corresponding oral soft tissues 3D data obtained by IOS using software of surgical planning. * Digital waxing up with new desired positions of gingival margins and zenith points performed. * Designing Gingivectomy guide then exported to a 3D printer and mill a transparent resin gingivectomy guide. 6. Surgical Procedure: anesthetized the patient using local anesthesia, Surgical incision using 15c blade following CEJ anatomy will be made at each tooth using the Gingivectomy guide as reference to new gingival level and being careful to preserve the gingival papillae without involving the palatal surfaces. 7. Postoperative care | Procedure or surgery | Digital workflow-based Protocol |
| Convectional guided gingivectomy procedure1. Full history with clinical and radiographic examination (CBCT) to aid in patient's selection. 2. Supra- and sub-gingival debridement with OHI 3. Gingivectomy guide fabrication: * Impressions and casts obtained. * Waxing-up included new positions of gingival margins and zenith points. * Silicone index with condensation silicone impression materials made with pressure on the cast to reproduce the details of the wax, then filled after setting with resin material and placed in the patient's mouth. * Resin mock-up trimmed with blade to define the correct new gingival level. * After the patient accept the mock-up design will used as Gingivectomy guide. 4. Surgical Procedure: anesthetized the patient using local anesthesia, Surgical incision using 15c blade following CEJ anatomy will be made at each tooth using the Gingivectomy guide as reference to new gingival level and being careful to preserve the gingival papillae without involving the palatal surfaces. 5. Postoperative care | Procedure or surgery | Mock-up workflow-based Protocol |
Primary outcome
Accuracy of both guides
Time frame: Immediately postsurgical, 4 weeks and 2 months after surgery
Intraoral digital scanning for obtaining gingival contour will be made immediately postsurgical, 4 weeks and 2 months after surgery and exported in STL files format. Diagnostic waxing-up on poured cast (for group 2) will be digitalized with a model scanner and exported in STL file format. Accuracy will be evaluated by: * Superimposing postoperative intraoral digital scanning STL files with virtually designed diagnostic waxing STL file (for group 1) and obtain matching differences in height of gingival margin in relation to Muco-gingival junction. * Superimposing postoperative intraoral digital scanning STL files with digitized waxing-up STL file (for group 2) and obtain matching differences in height of gingival margin in relation to Muco-gingival junction.
1 secondary outcome
Patient Satisfaction
Time frame: 2 months
Results and safety
The study is completed, but results are not available in the source record. That does not mean the treatment did or did not work.
Research links
- Official record on ClinicalTrials.govLast updated by the sponsor 3 Jun 2026.
- Background: PubMed 32321195Ahmed WM, Hans A, Verhaeghe TV, Nguyen C. Managing Excessive Gingival Display Using a Digital Workflow. J Prosthodont. 2020 Jun;29(5):443-447. doi: 10.1111/jopr.13181. Epub 2020 May 6.
- Background: PubMed 26140976Arias DM, Trushkowsky RD, Brea LM, David SB. Treatment of the Patient with Gummy Smile in Conjunction with Digital Smile Approach. Dent Clin North Am. 2015 Jul;59(3):703-16. doi: 10.1016/j.cden.2015.03.007.
- Background: PubMed 10863370Armitage GC. Development of a classification system for periodontal diseases and conditions. Ann Periodontol. 1999 Dec;4(1):1-6. doi: 10.1902/annals.1999.4.1.1.
- Background: PubMed 10709500Bensimon GC. Surgical crown-lengthening procedure to enhance esthetics. Int J Periodontics Restorative Dent. 1999 Aug;19(4):332-41.
- Background: PubMed 276255Coslet JG, Vanarsdall R, Weisgold A. Diagnosis and classification of delayed passive eruption of the dentogingival junction in the adult. Alpha Omegan. 1977 Dec;70(3):24-8. No abstract available.
- Background: PubMed 10093519Davarpanah M, Jansen CE, Vidjak FM, Etienne D, Kebir M, Martinez H. Restorative and periodontal considerations of short clinical crowns. Int J Periodontics Restorative Dent. 1998 Oct;18(5):424-33.
- Background: PubMed 19419444De Rouck T, Eghbali R, Collys K, De Bruyn H, Cosyn J. The gingival biotype revisited: transparency of the periodontal probe through the gingival margin as a method to discriminate thin from thick gingiva. J Clin Periodontol. 2009 May;36(5):428-33. doi: 10.1111/j.1600-051X.2009.01398.x.
- Background: PubMed 9477899Dolt AH 3rd, Robbins JW. Altered passive eruption: an etiology of short clinical crowns. Quintessence Int. 1997 Jun;28(6):363-72.
- Background: PubMed 32111273Dym H, Pierre R 2nd. Diagnosis and Treatment Approaches to a "Gummy Smile". Dent Clin North Am. 2020 Apr;64(2):341-349. doi: 10.1016/j.cden.2019.12.003. Epub 2020 Jan 24.
- Background: PubMed 17695343Faul F, Erdfelder E, Lang AG, Buchner A. G*Power 3: a flexible statistical power analysis program for the social, behavioral, and biomedical sciences. Behav Res Methods. 2007 May;39(2):175-91. doi: 10.3758/bf03193146.
- Background: PubMed 9567953Garber DA, Salama MA. The aesthetic smile: diagnosis and treatment. Periodontol 2000. 1996 Jun;11:18-28. doi: 10.1111/j.1600-0757.1996.tb00179.x. No abstract available.
- Background: PubMed 18978715Garcia B, Larrazabal C, Penarrocha M, Penarrocha M. Pain and swelling in periapical surgery. A literature update. Med Oral Patol Oral Cir Bucal. 2008 Nov 1;13(11):E726-9.
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Referral and contact
AzTrials does not enrol participants or take referrals. Contact the study team or a site listed below; they decide who can take part. This study is not recruiting at the moment.
Ahmed E. Amr, Ass. Prof. study director
Faculty of dentistry Ain Shams University
1 site in 1 country: see every site and its status.
Questions about this trial
What is this clinical trial studying?
A study testing Fully digital guided gingivectomy procedure and Convectional guided gingivectomy procedure in people with Altered Passive Eruption of Teeth, run by Ain Shams University at 1 site in Egypt.
The full registered description is in the About this study section and the official record.
Who may be eligible to take part?
The sponsor lists 2 inclusion and 8 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.
Is this clinical trial currently recruiting?
The record says: finished, as of the sponsor's last update on 3 Jun 2026. Status can change between updates, so confirm with the study contact before making plans.
Where is the study taking place?
The record lists 1 site in Egypt. Whether a site is taking part right now should be confirmed with that site. See every site.
What are the possible benefits and risks?
They depend on the study and the treatment, and no study can promise a benefit. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.
Are results available for this study?
The study is completed, but results are not available in the source record. That does not mean the treatment did or did not work.
How can a doctor refer a patient or contact the research team?
The record lists no contact. The official record names the sponsor, who can be asked directly. AzTrials does not enrol participants or take referrals.
What does the primary outcome measure?
Accuracy of both guides (time frame: Immediately postsurgical, 4 weeks and 2 months after surgery). It is what the study was designed to measure, not a finding.
Where can I read the original study information?
On the ClinicalTrials.gov record for NCT05969132, which also lists 28 linked publications.
Does a listing mean the treatment is approved or proven to work?
No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.
How often is this information updated?
AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 3 Jun 2026.