The Indications of First Molar Extraction at Tufts University, School of Dental Medicine

NCT04705181 | Active Not Recruiting

• 1 other identifier: STUDY00000314
• Study Type: observational
• Target: 240
• Locations: 1 country
• Sites: 1

Brief Summary

The aim of the present study is to investigate whether there has been a change of criteria for tooth extraction at Tufts University School of Dental Medicine (TUSDM) from 2005 to 2018. The primary outcome is the change of mean of radiographic interproximal bone loss of extracted teeth. The secondary outcomes are changes of other parameters (periodontal, endodontic and restorative) of extracted teeth and reasons for extraction.

Conditions

Tooth Extraction

Outcome Measures

Primary Outcomes (2)

• Part 1: Change in mean of radiographic interproximal bone loss of extracted teeth

  * All the measurements are based on the following reference points projected onto the theoretical tooth long axis * Cemento-enamel junction (CEJ); if there is dental restoration or prosthesis on tooth making CEJ undetectable on the radiographs, the apical margin of dental restoration or prosthesis will be used as CEJ * The most apical points of mesial and distal interproximal bone height * The apex of root * The radiographic mesial and distal bone loss will be determined by the proportion of the distance between bone height to apex and the distance between CEJ to apex, projected on the tooth axis * The greater bone loss of the mesial and distal sides on radiographs will be used for further analysis

  2005-2018

• Part 2: Change of criteria for tooth extraction

  The aim for sub-project 2 represent an extension of the Aim for Subproject 1 outlined above. This sub-project will investigate whether there has been a change of criteria for tooth extraction at TUSDM from 2007 to 2018 specifically for and limited to molar teeth that were extracted and subsequently replaced with dental implants. Criteria for extraction of first molar teeth has changed between 2007 and 2018 toward early extraction of teeth with less severe periodontal and other conditions.

  2007-2018

Eligibility Criteria

• Sex: all
• Healthy Volunteers: Yes
• Age Groups: Child (0-17), Adult (18-64), Older Adult (65+)
• Sampling Method: Non-Probability Sample

Study Population

Patients who had fully-erupted first molar extraction (tooth number #3 or #14 or #19 or #30) under CDT code of D7140 (Extraction, erupted tooth or exposed root) and D7210 (Extraction, erupted tooth requiring removal of bone and/or sectioning of tooth, and including elevation of mucoperiosteal flap if indicated) at TUSDM

You may qualify if:

• Patients who had fully-erupted first molar extraction (tooth number #3 or #14 or #19 or #30) under Code on Dental Procedures and Nomenclature (CDT) code of D7140 (Extraction, erupted tooth or exposed root) and D7210 (Extraction, erupted tooth requiring removal of bone and/or sectioning of tooth, and including elevation of mucoperiosteal flap if indicated) at TUSDM.
• The electronic records must include the following data:
• Gender
• Age
• Comprehensive periodontal chart, including probing depth (PD), clinical attachment level (CAL), furcation involvement and mobility. The periodontal chart has to be recorded within 12 months before tooth extraction
• Periapical radiograph and bite-wing radiographs of extracted tooth. The radiographs have to be taken within 12 months before tooth extraction
• Reasons for tooth extraction
• Part 2:
• Patients who had:
• Fully-erupted first and second molars (tooth number #2, #3, #14, #15, #18, #19, #30, #31) that were extracted under CDT codes D7140 (Extraction, erupted tooth or exposed root) or D7210 (Extraction, erupted tooth requiring removal of bone and/or sectioning of tooth, and including elevation of mucoperiosteal flap if indicated).
• The same extracted tooth were replace with dental implant placement under CDT code D6010 (Surgical placement, endosteal implant) within 24 months after extraction.
• The electronic records must include the following data
• Sex
• Age
• Dental records including:

You may not qualify if:

• Absence of tooth distal to extracted tooth.
• a. Clinical decision for tooth extraction may be affected by tooth location. When the tooth is the distal abutment in the dentition, clinicians tend to keep the tooth even if the prognosis is compromised.
• Presence of dental implant adjacent to extracted tooth a. Clinical decision for tooth extraction may be affected by adjacent dental implants.

Sponsors & Collaborators

• Tufts University: lead

Study Sites (1)

Tufts University School of Dental Medicine

Boston, Massachusetts, 02111, United States

Location

Study Officials

• Bjorn Steffensen, DDS, MS, PhD

  Tufts University School of Dental Medicine

  PRINCIPAL INVESTIGATOR

Study Design

• Study Type: observational
• Observational Model: OTHER
• Time Perspective: RETROSPECTIVE
• Sponsor Type: OTHER
• Responsible Party: PRINCIPAL INVESTIGATOR
• PI Title: Professor and Chair Department of Periodontology

Study Record Dates

• First Submitted: January 8, 2021
• First Posted: January 12, 2021
• Study Start: March 19, 2020
• Primary Completion (Estimated): June 30, 2027
• Study Completion (Estimated): June 30, 2028
• Last Updated: September 19, 2025

Record last verified: 2025-09

Locations

US (1)