Comparison of Dual Digitally Guided vs Conventional Crown Lengthening (DIGICROWN)
Randomized Controlled Trial Evaluating Digital Dual Surgical Guide in Esthetic Crown Lengthening
This randomized controlled clinical trial aims to evaluate the clinical performance and patient-centered outcomes of dual digitally guided crown lengthening compared to the conventional surgical technique in the management of gummy smile caused by altered passive eruption (Type B1).
A total of 18 patients will be randomly allocated into two groups: the control group will undergo conventional crown lengthening based on clinical measurements, while the intervention group will receive crown lengthening using a dual digitally fabricated surgical guide.
The primary outcome is the gain in clinical crown length at 3 months. Secondary outcomes include operating time, pain perception, patient satisfaction, gingival margin stability, and periodontal clinical parameters.
This study aims to determine whether digital guidance improves surgical accuracy, efficiency, and patient satisfaction compared to traditional techniques
Descripción general del estudio
Estado
Condiciones
Intervención / Tratamiento
Descripción detallada
Esthetic crown lengthening is a commonly performed periodontal surgical procedure indicated for the correction of excessive gingival display, particularly in cases of altered passive eruption. Achieving optimal esthetic outcomes requires precise determination of gingival and osseous resection levels, which can be challenging using conventional clinical methods.
With the advancement of digital dentistry, computer-aided design and manufacturing (CAD/CAM) technologies have enabled the development of digitally guided surgical approaches. The dual digitally guided technique integrates two levels of guidance to control both soft tissue and bone resection, potentially enhancing surgical precision and predictability.
This randomized controlled clinical trial is designed to compare the effectiveness of dual digitally guided crown lengthening with the conventional technique in patients presenting with gummy smile due to altered passive eruption (Type B1).
Eighteen systemically healthy patients aged 18-40 years will be recruited and randomly assigned into two equal groups. The control group will undergo conventional crown lengthening using clinical measurements and manual surgical techniques. The intervention group will be treated using a dual digitally fabricated surgical guide based on digital smile design, CBCT analysis, and intraoral scanning.
Clinical and patient-reported outcomes will be assessed at baseline and during follow-up periods. The primary outcome is the gain in clinical crown length measured at 3 months postoperatively. Secondary outcomes include operating time, pain (VAS), patient satisfaction (VAS), gingival margin level, probing depth, gingival index, plaque index, bleeding on probing, keratinized gingival height, and gingival thickness.
The results of this study are expected to provide evidence regarding the benefits of digital guidance in periodontal esthetic surgery and its potential to improve clinical outcomes and patient experience.
Tipo de estudio
Inscripción (Actual)
Fase
- No aplica
Contactos y Ubicaciones
Ubicaciones de estudio
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Damascus, Siria
- School of Dental Medicine
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Criterios de participación
Criterio de elegibilidad
Edades elegibles para estudiar
- Adulto
Acepta Voluntarios Saludables
Descripción
Inclusion Criteria:
- Patients presenting with gummy smile due to altered passive eruption (Type B1)
- Presence of at least 6 maxillary anterior teeth indicated for crown lengthening
- Good oral hygiene and ability to maintain plaque control
- Systemically healthy patients
Exclusion Criteria:
- Poor oral hygiene
- Smokers
- Pregnancy or lactation
- Systemic diseases affecting periodontal tissues
- Previous periodontal surgery in the study area
- Active periodontal disease
- Presence of periapical pathology in the study area
- Ongoing orthodontic treatment
- Gummy smile due to skeletal or muscular causes
Plan de estudios
¿Cómo está diseñado el estudio?
Detalles de diseño
- Propósito principal: Tratamiento
- Asignación: Aleatorizado
- Modelo Intervencionista: Asignación paralela
- Enmascaramiento: Único
Armas e Intervenciones
Grupo de participantes/brazo |
Intervención / Tratamiento |
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Comparador activo: Conventional Crown Lengthening
Participants in this group will undergo conventional surgical crown lengthening based on clinical evaluation and manual measurements.
The procedure includes gingivectomy and osseous resection performed according to standard periodontal surgical protocols without the use of digital guidance.
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Conventional surgical crown lengthening performed based on clinical examination and manual measurements.
The procedure includes gingival recontouring and osseous resection carried out according to standard periodontal surgical protocols without the use of digital guidance.
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Experimental: Dual Digitally Guided Crown Lengthening
Participants in this group will receive crown lengthening using a dual digitally fabricated surgical guide.
The procedure is planned using digital smile design, intraoral scanning, and CBCT analysis to guide both soft tissue and bone resection, aiming to improve surgical precision and predictability.
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Crown lengthening performed using a dual digitally fabricated surgical guide.
The procedure is planned using digital smile design, intraoral scanning, and CBCT imaging to guide both soft tissue and bone resection, enhancing surgical accuracy and predictability.
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¿Qué mide el estudio?
Medidas de resultado primarias
Medida de resultado |
Medida Descripción |
Periodo de tiempo |
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Gain in Clinical Crown Length
Periodo de tiempo: Baseline and 3 months postoperatively
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Change in clinical crown length (mm), measured from the incisal edge to the gingival margin using a periodontal probe, to assess the effectiveness of crown lengthening procedures.
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Baseline and 3 months postoperatively
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Medidas de resultado secundarias
Medida de resultado |
Medida Descripción |
Periodo de tiempo |
|---|---|---|
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Surgical Operating Time
Periodo de tiempo: During surgery (intraoperative)
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Total duration of the surgical procedure measured in minutes from the first incision to completion of osteotomy.
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During surgery (intraoperative)
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Relative Gingival Margin Level
Periodo de tiempo: Baseline, 1 week, and 3 months postoperatively
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Measurement of gingival margin position (mm) relative to a fixed reference point to evaluate soft tissue stability.
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Baseline, 1 week, and 3 months postoperatively
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Probing Depth
Periodo de tiempo: Baseline and 3 months postoperatively
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Periodontal probing depth (mm) measured at standardized sites using a periodontal probe.
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Baseline and 3 months postoperatively
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Gingival Index (GI)
Periodo de tiempo: Baseline and 3 months postoperatively
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Assessment of gingival inflammation using the Gingival Index scoring system.
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Baseline and 3 months postoperatively
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Plaque Index (PI)
Periodo de tiempo: Baseline and 3 months postoperatively
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Assessment of oral hygiene status using the Plaque Index scoring system.
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Baseline and 3 months postoperatively
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Bleeding on Probing (BOP)
Periodo de tiempo: Baseline and 3 months postoperatively
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Presence or absence of bleeding upon gentle probing, expressed as a percentage of bleeding sites.
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Baseline and 3 months postoperatively
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Keratinized Gingival Height
Periodo de tiempo: Baseline, 1 week, and 3 months postoperatively
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Width of keratinized gingiva (mm) measured from the gingival margin to the mucogingival junction.
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Baseline, 1 week, and 3 months postoperatively
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Gingival Thickness
Periodo de tiempo: Baseline and 3 months postoperatively
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Thickness of gingival tissue (mm) measured using transgingival probing or ultrasound methods.
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Baseline and 3 months postoperatively
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Postoperative Pain (Visual Analog Scale)
Periodo de tiempo: 24 hours, 7 days, and 14 days postoperatively
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Patient-reported pain assessed using a Visual Analogue Scale (VAS) ranging from 0 (no pain) to 10 (worst pain imaginable).
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24 hours, 7 days, and 14 days postoperatively
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Patient Satisfaction (Visual Analog Scale)
Periodo de tiempo: 7 days and 3 months postoperatively
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Patient satisfaction with the esthetic and functional outcome measured using a Visual Analogue Scale (VAS).
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7 days and 3 months postoperatively
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Colaboradores e Investigadores
Patrocinador
Colaboradores
Investigadores
- Investigador principal: Raghad Alrefaai, DDs, Damascus University
- Silla de estudio: Razan Khattab, PhD, Damascus University
- Director de estudio: Saleh Al Kurdi, PhD, Arab International University
Publicaciones y enlaces útiles
Publicaciones Generales
- Malkinson S, Waldrop TC, Gunsolley JC, Lanning SK, Sabatini R. The effect of esthetic crown lengthening on perceptions of a patient's attractiveness, friendliness, trustworthiness, intelligence, and self-confidence. J Periodontol. 2013 Aug;84(8):1126-33. doi: 10.1902/jop.2012.120403. Epub 2012 Nov 9.
- Pavone AF, Ghassemian M, Verardi S. Gummy Smile and Short Tooth Syndrome--Part 1: Etiopathogenesis, Classification, and Diagnostic Guidelines. Compend Contin Educ Dent. 2016 Feb;37(2):102-7; quiz 108-10.
- Marzadori M, Stefanini M, Sangiorgi M, Mounssif I, Monaco C, Zucchelli G. Crown lengthening and restorative procedures in the esthetic zone. Periodontol 2000. 2018 Jun;77(1):84-92. doi: 10.1111/prd.12208. Epub 2018 Mar 1.
- Bynum J. Treatment of a "Gummy Smile": Understanding Etiology is Key to Success. Compend Contin Educ Dent. 2016 Feb;37(2):114-22.
- Carrera TMI, Freire AEN, de Oliveira GJPL, Dos Reis Nicolau S, Pichotano EC, Junior NVR, Pires LC, Pigossi SC. Digital planning and guided dual technique in esthetic crown lengthening: a randomized controlled clinical trial. Clin Oral Investig. 2023 Apr;27(4):1589-1603. doi: 10.1007/s00784-022-04780-8. Epub 2022 Nov 21.
Fechas de registro del estudio
Fechas importantes del estudio
Inicio del estudio (Actual)
Finalización primaria (Actual)
Finalización del estudio (Actual)
Fechas de registro del estudio
Enviado por primera vez
Primero enviado que cumplió con los criterios de control de calidad
Publicado por primera vez (Actual)
Actualizaciones de registros de estudio
Última actualización publicada (Actual)
Última actualización enviada que cumplió con los criterios de control de calidad
Última verificación
Más información
Términos relacionados con este estudio
Palabras clave
Términos MeSH relevantes adicionales
Otros números de identificación del estudio
- DN-10062024-3764
Plan de datos de participantes individuales (IPD)
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Información sobre medicamentos y dispositivos, documentos del estudio
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